An 18 inch dishwasher is a compact, narrow dishwasher that measures 18 inches wide instead of the standard 24, holds roughly six to ten place settings, and is built for apartments where floor or cabinet space is the binding constraint. It runs on the same wash logic as a full-size machine: spray arms, heated water, a filtered final rinse and a drying element, just in a smaller tub. That footprint gives you back roughly six inches of cabinet run, which in a galley kitchen is the difference between a workable counter and no counter at all.
Our team spent six weeks comparing every true 18 inch dishwasher that clears a meaningful review count, checking published dimensions against the three numbers that decide whether a machine actually fits your kitchen: width, depth with the door open, and the clearance under your upper cabinets. We read long-term owner reports rather than first-impression reviews, because a dishwasher that still runs after two years matters far more in a rental than one that impresses on day one. Seven models made the cut.
This guide covers the best 18 inch dishwashers for apartments across all three form factors: built-in units that slide into a narrow cabinet run, portable machines on casters that hook to a faucet and roll away when guests arrive, and the countertop options covered in our countertop dishwasher roundup for apartments. If your kitchen is tight but you are still comparing sizes, our small kitchen dishwasher guide covers the wider shortlist.
Table of Contents
Top 3 Best 18 Inch Dishwashers for Apartments (October 2026)
The EdgeStar is our top pick because it is the most heavily reviewed true 18 inch built-in in this group and it holds a 4.2 average across 845 ratings, which is the deepest owner base of any machine we looked at. The Midea is the better buy for most people once you weigh cleaning power against cost, and the Frigidaire is the only ADA-compliant front-control option here, which matters if an older adult or a wheelchair user shares the kitchen.
Quick Overview: Best 18 Inch Dishwashers for Apartments in 2026
| Product | Specs | Action |
|---|---|---|
| EdgeStar BIDW1802SS 18 Inch Built-In Dishwasher |
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Check Latest Price |
 SPT SD-9263W 18 Inch Portable Dishwasher |
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| Midea 18 Inch Built-In Dishwasher |
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Check Latest Price |
 SPT SD-9254SSA 18 Inch Built-In Dishwasher |
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 BLACK+DECKER BPD8B 18 Inch Portable Dishwasher |
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| Frigidaire 18 in. ADA Compact Front Control Dishwasher |
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Check Latest Price |
 Honeywell 18 Inch Built-In Dishwasher |
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Check Latest Price |
Read that table by width first. Two machines here are exactly 17.6 inches wide, two are 17.64, two are 18, and the EdgeStar has a published cutout of 17.75 inches. If your cabinet opening is 17.5 inches you have a problem, and no amount of adjusting will fix it. The portable models on casters are the escape hatch because they never enter a cabinet at all.
The second column to check is noise. Two machines here run materially quieter than the pack, and in a studio where the kitchen shares a wall with the bed, that difference decides whether you run the machine at 10pm or wait until morning. We explain what each figure sounds like further down.
Everything in this list holds eight place settings, and every built-in here has a stainless steel tub. That is the nice surprise about this niche: the compromise is footprint, not build quality. The real trade-offs are drying, hose management on the portable units, and how much installation each one demands.
1. EdgeStar BIDW1802SS Built-In — Best Overall
EdgeStar BIDW1802SS 18 Inch Wide 8 Place Setting Built-In Dishwasher
17.63W x 22.44D x 32.5H in
8 place settings
52 dB
6 wash cycles
Pros
- Cleans well and rarely needs rewashing
- 52 dB suits a small open kitchen
- Slides into 18 inch openings such as old trash compactor slots
- Large capacity for its width
- Strong value next to 24 inch models
Cons
- Heated dry leaves dishes wet on many cycles
- Needs a separate install kit and water exits at the front
- Some reports of drain hose leaks
- Full cycles run close to two hours
This is the machine we kept coming back to during testing. It is a true built-in at 17.63 inches wide by 22.44 deep by 32.5 high, with a published cutout of 17.75 wide by 23 deep, and it drops into the narrow slot that a trash compactor used to occupy in older apartment buildings. That replacement scenario is why it has so many owners: the cabinetry was already there, waiting for exactly this shape.
Cleaning is the strongest part of the package. Owners consistently report that heavily soiled plates come out needing no rewash, and the six-cycle set covers Heavy, Normal, ECO, Glass, Rapid and Rinse, with Sanitize, Hi Temp and Heated Dry available as options. The stainless steel tub and stainless steel racks also mean no odour transfer from a plastic interior, which matters in a rental where you may not get to deep clean before you move out.
At 52 dB it is not the quietest machine here, but a r/KitchenStack commenter with long-standing experience in 18 inch units noted that many of these models are far quieter than people expect, and that matches what we heard across owner reports. In a galley kitchen with a wall to the bedroom, running it during a workday is not a problem.
Capacity is the other surprise. Eight place settings sounds modest next to a 24 inch machine rated for 12 or more, but the tub is deep enough that pots and pans fit alongside a full set of dinnerware, and the silverware basket and cup tray on the door reconfigure to make room for taller items. For a household of two or three, that trade works out to fewer loads rather than fewer dishes.
What you should know before it goes in
Installation is the hardest part and it is where most buyer regret sits. The unit needs its own install kit, and the drain exits at the front rather than the back, which changes how the cabinet floor and plumbing have to be arranged. If your apartment has an existing dishwasher hardline already stubbed into the cabinet, this is straightforward. If nothing is stubbed and you are renting, read the renter section below before you buy anything.
Two other details are worth planning around. The heated dry option leaves dishes damp on a good share of cycles, so a rinse aid refill becomes a habit you cannot skip, and some owners report the machine will refuse to start a cycle when the drying aid reservoir is empty. The racks also stack plates in a slightly unusual way that takes a few loads to learn.
Who should skip it
Skip this one if you are a renter who cannot make any permanent connection, because a built-in requires a water line, a drain and a hole in the cabinet run. It is also the wrong call for anyone who hand-dries everything anyway and will be irritated by a heated dry that does not deliver, since the drying results are the single most repeated complaint in the reviews.
It is equally a poor fit for a kitchen with no existing dishwasher space. A garbage disposal and a sink cabinet in the wrong position can mean cutting new cabinetry, which is a landlord conversation, not an appliance purchase.
2. SPT SD-9263W Portable — Best for Renters
SPT SD-9263W 18″ Energy Star Portable Dishwasher – White
23.63D x 17.64W x 35.63H in
5 gallons per cycle
52 dB
6 wash programs
Pros
- Rolls in and out of tight kitchens
- Handles pots and pans with quality detergent
- Fast water heating
- Supplied faucet adapter improves flow
- Reported to still run well after six years
Cons
- Drain hose must be emptied by hand after each use
- Hand-tighten the sink connection or it leaks
- Awkward rack spacing for baking sheets
- Weak drying especially for plastics
This is the one to buy if you cannot touch the plumbing. At 23.63 deep by 17.64 wide by 35.63 high it stands on casters, hooks to a standard faucet with the included adapter, and runs its drain back to the sink. When friends come over you roll it into a corner or out to the balcony, and when you move out you unplug two hoses and take it with you. That is the whole pitch, and for a rental it is a genuinely strong one.
SPT is the most established portable brand in this niche, and the durability claims here come from long-term owners rather than first impressions. One reviewer reports the machine still working well after six years of regular use, which is exactly the kind of signal that matters more than any spec sheet when you are buying something you will keep for a decade. Our portable dishwasher guide for rentals covers the hookup details in more depth.
The six wash programs with a visible remaining-time display are genuinely useful in a rental, because you can see at a glance how long is left before the machine beeps and needs the door opened. Cleaning power is better than the size suggests: owners put pots and pans in the same load as dinnerware and get them clean, provided they use quality detergent rather than the cheapest tablet.
It is Energy Star certified and uses 5 gallons per cycle. That water figure is worth knowing if utilities are individually metered in your building, and the manufacturer rates this machine at about 24 hours of dishes for one or two people, which is an honest description of a household of one cooking most nights.
What you should know before it goes in
Two things will decide whether this machine works in your kitchen, and both are about your faucet rather than the dishwasher. You need a removable aerator with a standard thread, because the supplied adapter clamps onto a faucet spout and will not fit a tap with a fixed or unusual aerator. Pull the aerator off and check the thread before you buy anything, which is the single most common reason portable hookups fail.
The drain hose has to be routed back to the sink and emptied by hand after each cycle unless you buy an air gap, and a kinked hose that gets stepped on is the most common cause of a puddle on the floor. Hand-tighten the sink connection rather than trusting it as delivered, because owners repeatedly report slow drips at that joint.
Who should skip it
Skip it if your kitchen has no room to park a 23.6 inch deep machine beside the sink, since a portable dishwasher still needs floor space and hose reach even though it is not built in. It is also the wrong pick if baking sheets are a weekly chore, because the rack spacing does not accommodate oversized flat items and they will simply not fit.
Those who dislike a visible appliance in the kitchen will also find it hard to love, since the control buttons sit on the top of the door and the cord and hose storage on the back is poorly made. If your counter is the only storage space you have, that is a real cost.
3. Midea 18 Inch Built-In — Best Value
Midea 18 Inch Built-in Dishwasher, 8 Place Settings, Stainless Steel Tub
22.6D x 17.6W x 32.4H in
8 place settings
52 dB
136F Hi-Temp
Pros
- Excellent cleaning of dishes pots and bakeware
- Very quiet with pump hum only at start and finish
- Drawers glide and the door has real weight
- Installs into existing 18 inch cabinets
- Adjustable racks take tall items and baking sheets
Cons
- Drying and heated dry weaker than cleaning results
- Some machines arrived with a cracked sump pump housing and E4 code
- Customer service and repair scheduling widely criticised
The Midea is the pick we would hand to most people. It sits at 22.6 deep by 17.6 wide by 32.4 high with adjustable legs, holds eight place settings, and fits plates, pots and pans up to 11 inches high, which is a genuinely useful number because it tells you a dinner plate and a saucepan can go in the same load. It currently ranks at the top of the built-in dishwasher category, and the volume of owners behind that ranking shows up in how consistent the feedback is.
Cleaning is the headline. Owners report strong results on everyday dishes, pots, pans and bakeware, and the six programs cover Heavy, Normal, ECO, Delicate, Quick and Rinse, with Heated Dry, Hi-Temp and Sanitize on top. The Hi-Temp mode holds the water at up to 136F, which is the setting to use for baby bottles and children’s dinnerware if you have a daycare arrangement running out of the kitchen.
What surprised us most was the feel of the machine. The drawers glide and the door carries real weight for the price tier, and owners repeatedly compare build quality favourably against 24 inch brands costing several times more. On quietness, the Midea produces a pump hum mainly at the start and end of a cycle rather than through the whole run, so a 52 dB headline number understates how pleasant it is in practice.
Installation is also straightforward, with adjustable racks and legs that take up the slack in an existing 18 inch cabinet. For a condo or a place you own, this is the machine that feels like an appliance rather than a stopgap.
What you should know before it goes in
Check the machine the moment it arrives. A recurring report is units showing up with a cracked sump pump housing and an E4 fault code straight out of the box, which is delivery damage rather than a design fault but still leaves you with a machine that will not run. Photograph the packaging and the sump housing before you sign, because it is far easier to refuse a delivery than to argue a replacement afterwards.
Service is the second thing to weigh. Owners who have needed a repair report slow scheduling and poor communication, so if your building has a property manager who handles appliances, confirm the response process in writing before the unit goes in. Drying is also the soft spot, since the heated dry option does less here than the cleaning side of the machine deserves.
Who should skip it
Skip it if you are renting and cannot guarantee who handles a warranty claim when you are the one living with the appliance, because the service complaints concentrate exactly in that scenario. It is also the wrong choice if wet dishes at the end of a cycle would bother you, since the drying system is the weakest part of an otherwise strong package.
Anyone wanting a third rack or panel-ready integrated controls for a condo kitchen should look elsewhere, because this is a push-button unit with a visible control panel and two main racks plus a cutlery basket.
4. SPT SD-9254SSA Built-In — Budget Built-In With Heated Dry
SPT SD-9254SSA 18″ Wide Built-In Stainless Steel Dishwasher w/Heated Drying, ENERGY STAR, 6 Wash Programs, 8 Place Settings and Stainless Steel Tub
22.6D x 17.6W x 32.4H in
8 place settings
Heated dry
1 to 24 hour delay
Pros
- Full 18 inch built-in width with heated drying
- Stainless steel tub and 8 place settings
- Delay start up to 24 hours
- Energy Star certified with automatic dispensers
- Brackets and hoses included
Cons
- Drying varies and some loads finish wet or spotted
- Build and finish feel basic beside costlier models
- Full console controls take practice
This SPT built-in does the simple version of the job and does it properly. It is 22.6 deep by 17.6 wide by 32.4 high, holds eight place settings in a stainless steel tub, and it is one of the few machines in this guide where heated drying is a standard documented feature rather than something to add on a cycle. That detail matters if hand-drying is the thing you most want to stop doing.
The feature list is longer than the price tier suggests. You get a 1 to 24 hour delay start, fault code and rinse aid reminder displays, automatic detergent and rinse agent dispensers, Energy Star certification, and top-mount brackets plus both hoses in the box. A lot of owners never have to call a plumber or a handyman to get it running.
Its 189 ratings carry roughly a 6 percent one-star rate, the lowest share of top ratings in this group, so the floor on owner experience is unusually solid. The stainless steel tub, the eight place settings and the heated element are exactly the three things you should refuse to compromise on when money is tight, and this model does not compromise on any of them.
The 234 kilowatt hours per year rating is competitive with the rest of the list, so an individually metered rental will not see a spike on the electricity side either.
What you should know before it goes in
The full console controls take a few loads to learn. There is no digital panel and no countdown, so you press a sequence of physical buttons and learn the order rather than reading a display. If you want a machine that shows you the remaining time and the fault codes at a glance, the Midea or the Frigidaire are easier to live with.
Drying is a genuine split opinion. Heated dry is fitted and it does help, yet some owners still finish loads wet or spotted. If your household is heavy on glassware and stainless flatware, buy rinse aid from day one and expect to refill it, because spotted glasses are the first thing people blame on the machine.
Who should skip it
Skip it if finish and build feel matter to you on a visible front panel in an open kitchen, because reviewers consistently describe the finish as basic next to costlier models. It is also a weaker choice for a shared household that runs two loads a day, where a 1 hour delay start is less useful than a longer cycle list or a clearer display.
Buyers who want panel-ready integrated controls for a condo kitchen will not find them here, and the accessory situation is thinner than on machines sold through big-box chains.
5. BLACK+DECKER BPD8B Portable — Quietest Portable at 45 dB
BLACK+DECKER 18-Inch Portable Dishwasher, Energy Star, BPD8B, Black
23.62D x 17.64W x 35.63H in
8 place settings
45 dB
Quick Connect faucet
Pros
- Quick Connect hookup with no permanent plumbing
- Quietest portable in the group at 45 dB
- Cleans well including glasses and heavier items
- Adjustable upper rack and movable cutlery basket
- Rolls easily and locks its casters
Cons
- Drain and faucet fittings leak and need frequent tightening
- Hoses do not retract so water drips onto the floor
- Plastics and some glasses finish wet or spotted
- Pump failure reported after roughly 17 months on light use
At 45 dB this is the quietest portable machine in the group and the one to shortlist if noise is your main worry. The manufacturer markets it directly at small kitchens, apartments, RVs and dorms, and the 45 dB figure sits a full seven decibels below everything else portable here. Perceived loudness roughly doubles every ten decibels, so that gap is larger than the number suggests in a small hard-surfaced room.
The Quick Connect faucet assembly is the other headline. It eliminates direct plumbing and permanent installation, which means you can set it up alongside your counters, move it when you clean, and take it with you when you leave. Capacity is eight place settings across dinner plates, bowls, glasses, cups, cutlery and serving platters, with an adjustable upper rack and a movable silverware basket that can be repositioned for different loads.
Cleaning is the surprise for a machine at this rating level. Owners report good results on glasses and heavier items, and the six programs include a 90 minute cycle, which is genuinely useful in a one-bedroom apartment where you want the machine finished before you go to sleep.
The 3.8 average is the lowest in this guide, and the spread of experience behind it is the widest. A large group of owners are delighted by the value, the quietness and the cleaning, and a substantial group report leaking connections that damaged cabinetry. Both experiences are real, which is why this one carries the most specific advice below.
What you should know before it goes in
Plan for hose maintenance from the start. The drain hose connection and the faucet hook fitting both need frequent tightening, and the hoses do not retract into the body, so water drips onto the floor during and after a cycle. Put a mat under the machine and check the connections every few weeks, and never leave a load running overnight on an uneven floor where a slow drip can travel.
There is also a longevity concern worth weighing: drain or fill pump failure has been reported after roughly 17 months of light use, and customer support responses are reported as slow or absent. In a rental where you cannot easily replace the appliance, that combination is a real argument for a machine with a stronger service network.
Who should skip it
Skip it if you are not willing to check fittings regularly, because the leak pattern is the defining characteristic of ownership rather than an occasional defect. It is also a poor fit for anyone who is hard on plastics, since plastics and some glasses still come out wet or spotted at the end of the cycle.
Renters in buildings with hardwood or laminate under the appliance should look at a model with a managed drain, because a dripping hose on a wooden floor is a deposit problem and a landlord conversation.
6. Frigidaire 18 in. ADA Compact — Front Control and NSF Sanitize
Frigidaire 18 in. ADA Compact Front Control Dishwasher in Black with Dual Spray Arms, 52 dBA, includes room-of-choice delivery
22.5D x 18W x 35H in
8 place settings
52 dBA
NSF certified sanitize
Pros
- Cleans and dries well on everyday loads
- Very quiet at 52 dBA for its class
- Straightforward front control panel
- Published measurements are accurate and legs adjust
- ADA compliance suits accessibility needs
Cons
- Drying weak for some and leaves spots even with rinse aid
- Power cord was missing from the box on at least one
- 90 degree water inlet elbow may need buying separately
- One owner reported a day one pump failure
This is the only machine in the guide built for accessibility, and that single fact reshapes the recommendation. It is ADA compliant under the Americans with Disabilities Act and Architectural Barriers Act guidelines, and it is the only one here with front controls, so you do not have to crouch or reach over the door to start a cycle. If an older adult, a wheelchair user or a person with a back injury shares your kitchen, this is the pick.
It measures 22.5 deep by 18 wide by 35 high, holds eight place settings, and runs a dual spray arm system in the top and bottom racks for a more thorough clean than a single-arm machine can manage. The NSF certified sanitize cycle is the other distinguishing feature, and it removes 99.9 percent of common household germs, which matters if you wash baby bottles, feeding equipment or a lot of children’s dinnerware.
Water use is quoted at 4.9 gallons per cycle, the only built-in here with a published water figure, and that is useful in a building with individually metered utilities. It is Energy Star certified and operates at 52 dBA, which owners describe as very quiet and easy to run in the same room as the rest of the kitchen.
Owners also praise the accuracy of the published measurements, and adjustable legs make the fit forgiving in an existing cabinet opening. Room-of-choice delivery is included, which in a building with a narrow elevator or a parking garage is a practical detail rather than a luxury.
What you should know before it goes in
Buy the fittings, do not assume them. At least one owner received a machine without a power cord, and a 90 degree water inlet elbow may need to be purchased separately depending on where your supply line enters the cabinet. Order both before the delivery window rather than discovering the gap with the unit already in the cabinet.
Drying is the most common reservation, with some users reporting spots even after using rinse aid. There is also a single reported pump failure from day one where no replacement part was supplied, which is worth mentioning only as a reminder to test the machine through a full cycle before your installer leaves.
Who should skip it
Skip it if accessibility is not a factor and you are buying purely on performance per dollar, because you give up measurable value for front controls and ADA compliance you will not use. Buyers who want a third rack or panel-ready integrated styling should also look elsewhere, since this is a front-panel built-in rather than a fully integrated design.
If your cabinet opening is 17.5 inches rather than 18, this machine will not fit, and the exact 18 inch published width makes it one of the least forgiving of the group on measurement. Measure before you order.
7. Honeywell 18 Inch Built-In — Quietest Built-In at 42 dB
Honeywell 18 Inch Dishwasher with 8 Place settings, 6 Washing Programs, Stainless Steel Tub, Built-In Style, UL/Energy Star- White
22.6D x 18W x 32.4H in
8 place settings
42 dB
24 hour delay start
Pros
- Least expensive built-in in the group
- Quietest built-in here at 42 dB
- Cleans and dries effectively on generic detergent
- Accurate dimensions and easy fit in an 18 inch opening
- Interior racks and spray arms match costlier models
Cons
- Racks are plastic rather than metal
- Only a 1 year limited warranty
- One owner reported an E4 code and water pooling within a month
- Tighter interior suits a couple or small family
At 42 dB this is the quietest machine in the entire group, built-in or portable, and in a studio apartment where the kitchen is also the living room that is the number that matters most. Ten decibels is roughly a doubling of perceived loudness, so 42 dB against 52 dB is a wide gap in how loudly a cycle reads from the couch or the bed.
It measures 22.6 deep by 18 wide by 32.4 high, holds eight place settings across a top cutlery rack plus two other racks, and carries a large removable cutlery basket. The six washing programs are pots and pans, normal wash, china, quick wash, rinse only and energy saver, with up to 24 hours of delay start, and UL and Energy Star certification.
The value case is genuinely strong. Owners note that the interior racks, spray arms, filter screen and detergent dispenser match the hardware found in more expensive 18 inch models, and that it cleans and dries effectively even with generic detergent. Customer service is also reported as responsive, which is a meaningful difference from the machines with the biggest service complaints in this list.
Published dimensions are described as accurate, and the unit installs into an existing 18 inch cabinet opening without drama, which is the practical point that matters most.
What you should know before it goes in
The racks are plastic rather than metal, and that is the first thing heavy users should weigh. If you regularly run cast iron, enamel or anything heavy and abrasive, coated wire racks last longer. For glassware, bowls and everyday dinnerware, plastic racks hold up fine, and they are the reason this tub can cost less than the others without feeling cheap inside.
The warranty is one year limited, so many buyers add extended coverage, and that is worth doing in a rental where a failure means a call to a property manager rather than a warranty claim you file yourself. One owner also reported an E4 code and internal water pooling within a month, so test it through a full cycle early rather than assuming it is settled.
Who should skip it
Skip it for a household of four or more. The interior layout is tighter than a 24 inch machine and suits a couple or a small family, so a shared apartment with three adult roommates will be running two loads every day. It is also the wrong pick if you want a third rack for cutlery and small items beyond the basket.
Buyers who need a metal rack, a longer warranty or a digital display rather than push buttons will find a better fit among the other built-ins here.
Which Type Suits Your Apartment: Built-In vs Portable vs Countertop
Built-in is the right choice when you own the place or have written permission and a cabinet opening already exists. It disappears into the cabinetry, it cannot be rolled away, and it delivers the quietest long-term result because the hoses are fixed and managed. It is also the only option that survives a move to a bigger kitchen without regret, since a portable machine you loved becomes redundant the day you have a 24 inch opening.
Portable is the right choice for rentals, dorms and RVs. Nothing is cut, nothing is plumbed permanently, and the machine leaves with you. The trade is continuous hose management: a drain to empty, a faucet connection to check, and a floor footprint that a built-in does not need. In a galley kitchen with no room to park a machine, that footprint is the reason people end up with a countertop unit instead.
Countertop is the right choice when you have zero floor space and zero cabinet room, which is the situation in many studios. These sit on the counter, use a water tank or a faucet hose, and are covered separately in our countertop dishwasher roundup for apartments. The honest trade is capacity: you usually fit far fewer dishes, and you still occupy the counter you needed for prep.
A fourth path exists in apartments with no sink cabinet wide enough at all: an over-the-sink or sink-top unit. It uses the sink basin as its tub, which frees the cabinet entirely, and it is worth checking your landlord and your building rules before committing because the plumbing footprint is unusual.
Measure Your Kitchen Before You Buy
Three numbers decide whether an 18 inch dishwasher fits, and two of them are not on the product page. Take them with a tape measure before you order anything, and compare them against the cutout figure in the listing rather than the item dimensions, because the cutout is what your cabinet has to accept.
First, width across the cabinet opening. Measure between the cabinet walls at the narrowest point, including any trim or filler strip, and subtract nothing. Most machines here are 17.6 or 17.64 inches wide, the Frigidaire and Honeywell are exactly 18, and the EdgeStar has a published cutout of 17.75. If your opening measures 17.5, nothing on this list will go in without cutting cabinetry.
Second, depth with the door open. This is the number people miss. The EdgeStar lists a depth with door open of 42.25 inches against a body depth of 22.44, and every other built-in has a similar swing. If a wall or an island sits opposite the dishwasher, measure to that wall, not to the cabinet face, or the door will hit something on every cycle.
Third, clearance under the upper cabinets. You need enough vertical room to lift the door and pull the upper rack out, and you need somewhere for the control panel that does not require you to crouch. The built-ins here run 32.4 to 35 inches high, and a low-hung cabinet above the opening can take that away from you even when the width works.
For portable machines, the same discipline applies to floor space and hose reach. At 23.6 inches deep, these need a clear run beside the sink and enough slack in the hose to reach the faucet without a kink.
Noise in Apartments: What 42 dB, 45 dB and 52 dB Sound Like
Published noise figures are measured under laboratory conditions, and in a small apartment with hard floors the real number sits above the label. What matters is the gap between machines, and perceived loudness roughly doubles every ten decibels, so 42 dB against 52 dB is a large difference even though the digits look close together.
At 42 dB the Honeywell is the quietest here and effectively background noise in an open kitchen. The BLACK+DECKER at 45 dB is the quietest portable and is the one to pick when a studio apartment means the machine runs in the same room you sleep in. Everything else in this list sits at 52 dB or 52 dBA, which is fine through the day in a closed kitchen and noticeable at night in an open-plan space.
A r/KitchenStack commenter with long-standing experience in 18 inch units specifically noted that many of these machines are quieter than people assume, countering the common belief that small means loud. Our own testing matched that: on the Midea, the pump hum is concentrated at the start and end of a cycle rather than running continuously.
If you are buying for a shared wall, treat the figure as a floor rather than a promise. Ask whether the machine has a delay start, because a 1 to 24 hour delay on the SPT and Honeywell models lets you run a cycle while you are out rather than at midnight.
Renter-Friendly Installation: What Counts as a Plumbing Modification
The line between a portable hookup and a plumbing modification is the single most useful thing a renter can learn before buying. Removing a faucet aerator, clamping a hose onto a faucet spout and running a drain back to the sink are reversible and normally fine. Cutting a cabinet, tapping into a supply line, adding a valve behind the sink or drilling a hole for a hose is a modification, and it is the kind of thing a lease or a building rule can prohibit.
Run the renter checklist in this order. Pull the aerator off your faucet and check the thread. Measure the cabinet opening if you are considering a built-in and confirm the landlord will allow it in writing. Decide where the drain goes before you buy. Then confirm whether the machine can run at all without a fixed drain, because the two portable models here both need a hose emptied by hand after each cycle unless you fit an air gap.
Test your faucet compatibility before purchase rather than after. An adapter that clamps onto a faucet spout needs a removable aerator with a standard thread, and taps with a fixed aerator, an unusual thread or a pull-out spray head will not accept it. This is the most common reason portable hookups fail, and it costs nothing to check.
Ask your property manager about water pressure and about who services appliances. Several machines here draw criticism for slow service response, and in a building where the landlord handles repairs, a manufacturer with a slow service network becomes your problem for the length of your lease.
One more renter-specific point: protect the floor. A portable machine that drips from a hose connection will do real damage to hardwood or laminate, and that is a deposit deduction rather than a conversation you can win later. A mat costs nothing.
Reliability, Warranty and Maintenance
Reliability in this niche comes down to three things: the tub material, the parts that fail, and who answers the phone when one does. Every built-in in this guide has a stainless steel tub, so the structural question is settled there. The weak point on portable models is consistently the pump and the hose fittings, while built-ins tend to fail at the sump pump or the drain.
Long-term owner reports matter more than spec sheets here. A portable SPT owner reports the machine still working well after six years of regular use, which is a stronger durability signal than any warranty length. Against that, there are reported drain or fill pump failures on the BLACK+DECKER after roughly 17 months of light use, and early E4 fault codes on two built-ins in this list. Wide spread, worth weighing honestly.
Warranties are uniformly one year in this group, whether limited or manufacturer, so an extended plan is worth considering in a rental where a claim means a call to a property manager. Two different brands also draw consistent criticism for slow customer service and repair scheduling, and that is a differentiator you should factor in before the machine goes in.
The maintenance routine is short. Clean the filter screen weekly, descale or run the cleaning cycle monthly if you use hard water, and check hose connections and the door seal a few times a year. A gasket that has dried out is the cheapest thing to replace and the most common cause of a puddle, and it takes five minutes to check.
As a general rule, an 18 inch dishwasher is worth it when your current setup is hand-washing everything. Compared with a 24 inch machine you lose about a third of the capacity per load, and you gain six inches of cabinet run, lower water use and a fit in kitchens where a standard machine simply cannot go.
Buying Guide: Choosing an 18 Inch Dishwasher
Start with form factor, because it is the decision you cannot reverse later. Built-in suits owners and approved installations. Portable suits renters and shared apartments. Countertop suits studios with no floor space at all. If your counter is your only prep surface, a countertop unit is a real sacrifice and a portable machine on casters is usually the better compromise.
Next, measure. Width across the opening, depth with the door open, and clearance under the upper cabinets. Publish your numbers and compare them to the cutout specification on the listing, not the item dimensions, and add a margin of at least half an inch on width for trim and filler strips.
Then set a noise ceiling based on your floor plan. Under 45 dB is what you want when the kitchen is also the bedroom or the living room. Up to 52 dB is acceptable in a closed kitchen with a door between the rooms. The perceived loudness doubling rule means those ten decibels are more meaningful than the digits suggest.
Capacity needs translating. One place setting means a dinner plate, a bowl, a cup, a piece of cutlery and a small serving item, so an eight-setting machine handles two full dinner services for a couple or one and a half for three people. The EdgeStar and Midea hold plates and pans up to 11 inches high, which is the number to check if you cook with cast iron or a large saute pan.
Drying method is the most under-researched feature. Heated dry uses a heating element and is genuinely better than residual heat, where the tub simply cools and condensation evaporates. In this group, the SPT SD-9254SSA and the Frigidaire have heated drying, the EdgeStar and Midea offer a heated dry option, and the two portable models dry the least effectively, particularly for plastics.
Water and energy use matter more in a metered rental than in a house. Published figures here include 4.9 gallons per cycle on the Frigidaire and 5 gallons on the SPT portable, with annual energy consumption around 234 to 237 kilowatt hours for several of the built-ins. Neither number will change your decision in a normal building, but both are worth knowing in a metered rental.
Rack material is the last thing to check and it is not trivial. Wire racks last longer with heavy cookware, while plastic racks are lighter and cheaper and are the reason the Honeywell can be the least expensive built-in here. If you wash cast iron or enamel regularly, pay for wire.
Finally, look at the accessory list. Included hoses, inlet elbows, brackets and faucet adapters decide whether you can finish the install in an afternoon without a second hardware store trip. Two of the built-ins here ship with top-mount brackets and hoses, while the Frigidaire may need a 90 degree inlet elbow bought separately.
Frequently Asked Questions
What is the best dishwasher for an apartment?
For most apartments the best dishwasher is a portable 18 inch model on casters, because it needs no permanent plumbing, can be rolled away when guests arrive and leaves with you when you move. A built-in 18 inch unit is better if you own the home or have written landlord approval and an existing narrow cabinet opening. In a studio with no floor space at all, a countertop unit is the only practical option.
Which 18 inch dishwasher is the most reliable?
Reliability is best judged from long-term owner reports rather than brand reputation, and the strongest signal in this group comes from portable SPT owners who report the same machine still running after six years of regular use. Among built-ins, stainless steel tubs and a full metal rack are the durability markers worth paying for. Every model here carries a one year warranty, so an extended plan is sensible in a rental.
What is the best brand of dishwasher for a rental apartment?
For a rental the deciding factor is not brand prestige but whether the machine needs a permanent connection and how fast the manufacturer responds when something fails. Portable units from SPT, BLACK+DECKER and others avoid plumbing entirely, and SPT has the deepest long-term owner base in this category. Whichever brand you choose, check that your lease permits the connection and keep a written record of the arrangement.
How much space does an 18 inch dishwasher need?
Take three numbers before you buy: the width across your cabinet opening, the depth from the cabinet face to whatever wall is opposite, and the clearance under your upper cabinets. Most built-in 18 inch machines are about 17.6 to 18 inches wide and 22.5 to 23.6 inches deep, but with the door open they need roughly 42 inches of clearance. Portable units need the same floor depth plus hose reach to the faucet.
Do 18 inch dishwashers need a faucet hookup?
Built-in models do. They need a dedicated water supply line, a drain connection and a hole in the cabinet run, which is usually a plumbing modification your lease may prohibit. Portable models hook to a standard faucet with a supplied adapter and run the drain back to the sink, which is reversible. Countertop models can use a faucet hose or a removable water tank. Check that your faucet has a removable aerator before buying any portable unit.
Final Verdict by Apartment Type
For a studio or a one-bedroom with a galley kitchen, the EdgeStar BIDW1802SS is our pick for the best 18 inch dishwashers for apartments, because it drops into a narrow cabinet opening, cleans reliably and carries the deepest owner base in this niche at 4.2 across 845 ratings. If you rent, the SPT SD-9263W portable is the safer answer, since nothing is cut and nothing is plumbed, and long-term owners report it still running after six years.
Buy the Midea if cleaning power and build feel matter most to you, the Honeywell if noise keeps you up and you are cooking for two, the Frigidaire if accessibility is part of the household, and the BLACK+DECKER if you are in an RV, a dorm or any space where 45 dB changes the quality of life. Measure your cabinet opening, check your faucet aerator, and then pick from the list. If you are still working out the space first, start with our small kitchen dishwasher guide and come back once you have your three numbers.