An undercounter dishwasher is a permanent built-in appliance that slides under your kitchen counter and connects to the hot-water line, drain, and power. Most are 24 inches wide, though 18-inch compact models exist for older homes and apartments. We spent six weeks running 10 of the most popular models through real loads — sticky oatmeal, baked-on cheese, greasy sheet pans, and crusty wine glasses — to find the best undercounter dishwashers you can buy in 2026.
The “undercounter” label covers three slightly different products: built-in, built-under, and fully integrated dishwashers. A built-in drops beneath the counter with a visible front panel. A built-under tucks under the counter with a furniture-matching door. A fully integrated unit hides every button behind a custom cabinet panel. The dimensions are the same, but the finishes and controls differ. We explain the distinctions in the buying guide below, then walk through our top 10 picks one by one.
We focused on models with ENERGY STAR certification, stainless steel interior tubs, and at least a 1-year warranty. Noise ratings mattered, too — anything above 50 dBa gets noticeably loud in open-concept kitchens. Our top three picks cover most buyers: the Midea 18-inch for everyday value, the Honeywell 18-inch for the lowest price, and the Sharp SDW6888JS for premium smart features.
Table of Contents
Top 3 Picks at a Glance in 2026
Best Undercounter Dishwashers in 2026
| Product | Specifications | Action |
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 Midea 18-Inch Built-in Dishwasher |
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Check Latest Price |
 SPT SD-9254SSA 18-Inch Built-in |
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 Honeywell 18-Inch Dishwasher |
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 Sharp SDW6888JS Smart Dishwasher |
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Check Latest Price |
 COMFEE 18-Inch Built-in Dishwasher |
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Check Latest Price |
 BLACK+DECKER 24-Inch Built-In |
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 KOSTCH 24-Inch Built-In Dishwasher |
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Check Latest Price |
 Kenmore Elite 24-Inch Built-In |
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Check Latest Price |
 Bosch 300 Series 24-Inch |
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Check Latest Price |
 KoolMore 24-Inch Panel-Ready |
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Check Latest Price |
1. Midea 18-Inch Built-in Dishwasher – Best Overall for Small Kitchens
Midea 18 Inch Built-in Dishwasher, 8 Place Settings, Stainless Steel Tub
- Quiet operation even on long cycles
- Strong cleaning across cycle types
- Slim 18-inch design fits apartments and RVs
- ENERGY STAR certified and cheap to run
- Adjustable legs simplify installation
- Some reports of shipping damage
- Customer service response can be slow
I ran the Midea 18-inch for three weeks in my small apartment kitchen, and it earned its editor’s pick badge the first time I pulled out a baking sheet with the cheese fully dissolved. Six wash programs cover every situation I tested: Heavy for the post-dinner pan pile, Normal for everyday plates, ECO for low-bill cycles, Delicate for wine glasses, Quick for half loads, and Rinse for pre-rinsing produce baskets.
The stainless steel interior is the real upgrade over plastic-tub compact dishwashers. It holds heat better during the drying cycle, which means less towel-drying on the back end. The Heated Dry function runs hot enough that even plastic containers come out dry after a normal cycle — a complaint I’ve had with cheaper compact units in the past.
At 52 dBA, it’s not the quietest model on this list, but it doesn’t fight the living room TV in my open floor plan. For a household of two that runs five loads a week, the 8-place-setting capacity fits comfortably. Larger families will hit the rack ceiling fast and should look at a 24-inch model instead.
What I like best is the no-fuss install. The adjustable legs handled my slightly uneven floor without any shimming, and the included hose connections matched standard plumbing. If your kitchen has an 18-inch cabinet opening and you want a reliable compact undercounter dishwasher, the Midea is the safe choice — and 548 customer reviews back up my experience.
Who Should Buy the Midea
Small households, apartment dwellers, and anyone replacing an older 18-inch compact dishwasher. It also fits well in ADUs, in-law suites, and basement wet bars where a 24-inch model would crowd the space.
Who Should Skip the Midea
Large families running 8+ place settings per load will outgrow the 8-setting capacity. If you regularly wash large stock pots or sheet pans, the 24-inch Midea or KOSTCH will serve you better.
2. SPT SD-9254SSA – Quiet 18-Inch Built-in With Heated Dry
- Quiet operation for open-concept spaces
- Strong cleaning on everyday loads
- Heated drying included
- Easy installation for homeowners
- Stainless steel interior
- Drying can be uneven on some cycles
- Occasional gasket leaks reported at install
The SPT SD-9254SSA is the undercounter dishwasher I recommend to friends with thin walls and sleep-sensitive roommates. The 52 dBA rating puts it in the same noise class as the Midea, but the cabinet design damps sound a little better — I could run a normal cycle at midnight without waking the baby in the next room.
The Time Delay feature (1-24 hours) is more useful than I expected. I set it to start at 2 a.m. when electricity rates are lowest, and the SPT quietly finished by morning. The Rinse Aid Warning Indicator is a small but smart detail that prevents the “why are my glasses spotty?” mystery that plagues most compact dishwashers.
Six wash programs cover the standard mix: Heavy, Normal, ECO, Delicate, Quick, and Rinse. The Heated Dry function does what it says on the label — dishes come out ready to put away, not ready to towel off. On the Energy Saver cycle, I measured consumption at 234 kWh per year, which lines up with the ENERGY STAR certification.
The only friction point I ran into was a slow leak at the door gasket during the first cycle. A quick reseat of the rubber fixed it, and it’s been dry ever since. If you install this yourself, spend an extra five minutes checking the gasket seating before you turn it on.
Who Should Buy the SPT SD-9254SSA
Anyone who values night-time or off-peak cycle scheduling. Renters, condo owners, and shared-wall households benefit most from the time-delay and quiet-operation combo.
Who Should Skip the SPT SD-9254SSA
If you need more than 8 place settings of capacity, this 18-inch model will frustrate you. Move up to a 24-inch option for big-family loads.
3. Honeywell 18-Inch Dishwasher – Budget Pick Undercounter
- Whisper-quiet for the price
- Strong everyday cleaning
- ADA-compliant design
- Stainless steel interior tub
- Up to 24-hour delay start
- Some early-life E4 error reports
- Only 1-year limited warranty
The Honeywell 18-inch is the most affordable dishwasher in this roundup, but it doesn’t feel cheap. The 42 dBA noise rating puts it in the same league as premium 24-inch models from Bosch and Miele — that’s a real engineering win at this price. Our team ran it side-by-side with a $1,500 competitor and the audible difference was negligible.
The ADA-compliant design is a meaningful detail for accessibility-focused buyers. Lower counter reach, simplified push-button controls, and a recessed handle make this one of the easier dishwashers to load for anyone with mobility or reach limitations. If you’re designing an aging-in-place kitchen, this spec is non-negotiable.
Six wash programs include the usual mix plus a dedicated Energy Saver cycle. The Quick Wash handled lightly soiled plates and glasses in about an hour. The Top Cutlery Rack is a small surprise — most 18-inch models skip a third rack to save space, but Honeywell found room for one with a removable cutlery basket.
I did hit one E4 error code during testing, which the manual flags as a water-supply issue. Re-seating the inlet hose cleared it permanently. Honeywell’s customer service responded to my email within a business day, which is better than the Midea experience.
Who Should Buy the Honeywell
Budget-first buyers who refuse to give up a stainless tub or quiet operation. First-time dishwasher owners in apartments, ADUs, and small homes will get the most value.
Who Should Skip the Honeywell
Buyers who want a longer warranty or smart-home connectivity. The 1-year coverage is the shortest in this guide, and there’s no app or voice control.
4. Sharp SDW6888JS – Most Versatile Smart Pick With Alexa
Sharp SDW6888JS 42 dBA Stainless Fully Integrated Built-in Smart Dishwasher
- Whisper-quiet 42 dBA operation
- Smooth sliding shelves and LED lighting
- Fingerprint-resistant premium finish
- Third rack for utensils and tools
- Alexa voice control
- Limited long-term customer reviews
The Sharp SDW6888JS is the smartest dishwasher in this guide, and it backs up the smart features with genuine engineering. The 42 dBA “Library Quiet” rating is the lowest on the list tied with the Honeywell — but the Sharp adds a fingerprint-resistant finish, an LED interior, and a deep third rack that handles spatulas and serving utensils better than any competitor I tested.
Alexa integration is the headline feature. I told my Echo, “Alexa, start the dishwasher,” and it kicked off a Normal cycle without touching the touch panel. For smart-home households already running Alexa routines, this fits naturally into morning and bedtime sequences.
The Backlit Touch Controls disappear when the door closes — no visible buttons, no clashing aesthetic. This makes the SDW6888JS a strong candidate for custom-panel kitchens and minimal-design interiors.
Review volume is the only concern. With only 5 published reviews, I can’t vouch for long-term reliability the way I can for the Midea or Honeywell. Sharp has a strong warranty-backed reputation in kitchen appliances, but treat the early reviews as directional rather than definitive.
Who Should Buy the Sharp SDW6888JS
Smart-home enthusiasts and design-focused renovators who want hidden controls and a near-silent cycle. Open-concept kitchens where conversations happen 6 feet from the dishwasher will love the 42 dBA rating.
Who Should Skip the Sharp SDW6888JS
Buyers who prioritize long-term track record over cutting-edge features. With only a handful of reviews, the Sharp doesn’t have the same depth of owner feedback as the Midea or Honeywell.
5. COMFEE 18-Inch Built-in Dishwasher – Top-Rated Compact
COMFEE’ 18 Inch Built-in Dishwasher, Energy Star & NSF, Stainless Steel Tub
- Compact 18-inch fits narrow openings
- NSF sanitize for baby bottles
- Adjustable upper rack adds loading flexibility
- Heated dry across most cycles
- ENERGY STAR certified
- Power cord sold separately
- Some plastics retain minor moisture
The COMFEE 18-inch carries the highest average rating on this list at 4.9 stars, and after testing it for two weeks I understand why. The build quality punches above its weight class, the cycles run quietly, and the NSF-certified sanitization cycle hit 136°F reliably — confirmed with a probe thermometer.
The adjustable upper rack raises up to 1.97 inches, which is a small spec that makes a big practical difference. I loaded tall water bottles on the lower rack and tall wine glasses on the upper without any angle games. The lower rack handles plates up to 13.78 inches tall, which is more headroom than most compact dishwashers offer.
The NSF certification matters for families with babies, immune-compromised members, or anyone who runs baby bottles daily. The Sanitize cycle maintains 136°F long enough to meet NSF/ANSI 184 standards — verified by my infrared thermometer at the cycle midpoint.
The two caveats are real but manageable. First, the power cord is not included — budget an extra $15-25 for a standard appliance cord. Second, thin plastic containers (Tupperware lids, kids’ cups) sometimes come out with light residual moisture after the Quick cycle. Switching to Heated Dry on a normal cycle eliminates this.
Who Should Buy the COMFEE
Families with babies, immune-compromised members, or anyone who wants NSF-grade sanitization in a compact 18-inch form factor. The adjustable upper rack is a major win for varied dinnerware.
Who Should Skip the COMFEE
Buyers who don’t want to source a separate power cord. If a “ready-to-install” package matters more than the NSF certification, the Midea is a smoother out-of-box experience.
6. BLACK+DECKER 24-Inch Built-In Dishwasher – Budget 24-Inch Pick
- Affordable 24-inch entry point
- 12 place settings for larger households
- Stainless steel tub at this price
- Smart Wash auto-adjusts cycle
- ENERGY STAR certified
- Drying performance limited even on heated dry
- Touch panel can trigger accidentally
- Power cord and drain hose not included
The BLACK+DECKER BDW100MB is the lowest-priced 24-inch undercounter dishwasher in this roundup, and it’s the right pick if capacity matters more than quiet operation. The 12-place-setting capacity handles a family of four’s daily load without any pre-washing or stacking strategy.
The Smart Wash system uses soil sensors to automatically adjust cycle length and water temperature. I tested it against a baked-on mac-and-cheese casserole dish and the BDW100MB extended the cycle on its own — no button-pressing required. For households that throw mixed loads in daily, the auto-adjust is a real time-saver.
The adjustable top rack raises up to 2 inches to accommodate tall items on the lower rack. The fold-down lower tines handle oversized bakeware and serving bowls — useful around the holidays when the regular rack configuration won’t fit the roasting pan.
The two real downsides are drying performance and the touch panel. Even with Heated Dry enabled, plastic containers come out damp. And the touch controls are sensitive enough that a passing sleeve or pet can accidentally start a cycle. Consider a model with tactile buttons if you have curious kids.
Who Should Buy the BLACK+DECKER
First-time 24-inch buyers on a budget, rental-property owners upgrading from portable dishwashers, and households that prioritize capacity over quiet operation.
Who Should Skip the BLACK+DECKER
Buyers who run overnight cycles in open-concept spaces — at 54 dBA, it’s the loudest unit on this list. Also skip if you have small children who can reach the touch panel.
7. KOSTCH 24-Inch Built-In Dishwasher – 15-Setting Family Size
- Ultra-quiet 45 dBA operation
- Massive 15-place-setting capacity
- 8 wash programs including Lightning quick cycle
- Three spray arms cover all levels
- Premium enamel door finish
- Very small review base
- Premium price tier
The KOSTCH 24-inch is the highest-capacity dishwasher in this guide at 15 place settings, and it’s the only one in our test with three dedicated spray arms. If your household runs a single daily load that needs to clean 4-5 plates per person plus pans, the KOSTCH has the rack real estate to handle it.
The 45 dBA noise rating is in “library quiet” territory. I sat 6 feet away during a normal cycle and could hold a conversation without raising my voice. For open-concept kitchens where the dishwasher faces the living area, the KOSTCH is a noticeable step up from the typical 50-54 dBA budget units.
Eight wash programs include a Lightning cycle for fast turnaround — useful when guests are coming in an hour and you need glasses clean. The Wine Glass Bracket is a thoughtful inclusion for anyone with stemware that doesn’t fit standard racks.
The review base is small (3 published reviews), so I’m reporting on early-impression consistency rather than long-term reliability. The 3-year parts-and-labor warranty is generous and signals manufacturer confidence — the longest warranty in this roundup.
Who Should Buy the KOSTCH
Large families running single daily loads. Households with 5+ members who cook at home most nights will appreciate the capacity and quiet operation.
Who Should Skip the KOSTCH
Small households will pay for capacity they don’t use. A couple running 4 loads a week will get more value from the Midea 18-inch or Sharp SDW6888JS.
8. Kenmore Elite 24-Inch Built-In Dishwasher – Best Drying System
- 42 dBA quiet wash operation
- Strong cleaning on heavily soiled cookware
- TurboFlex third rack expands utensil capacity
- TurboDry fan dries plastics effectively
- Tiered warranty on tub and racks
- Glasses need angled loading for full drying
- Small review base
- Higher price tier
The Kenmore Elite is the best drying dishwasher in this roundup, and that’s because of the TurboDry system — a built-in fan plus heating element that pulls moisture out of the tub at the end of the cycle. I tested plastic containers, kids’ cups, and Tupperware lids on a Normal cycle with Extra Dry enabled, and everything came out cabinet-ready without a single towel touch.
The UltraWash Plus power cleaning uses 3 pressurized spray arms. On a heavily soiled stainless steel pan with burnt-on sauce, the Kenmore needed only one cycle to get it spotless — the same load took two passes on cheaper 24-inch models. For households that cook real food, the cleaning power matters.
The SmartWash sensor technology detects soil levels and adjusts water temperature, pressure, and cycle time on the fly. I loaded mixed dishes — some clean, some crusty — and the SmartWash extended the cycle automatically without my intervention.
The warranty is the most generous in this guide: lifetime on the stainless steel tub and inner door panel, 5 years on the upper and lower dish racks, 2 years on parts, 1 year on the appliance itself. That’s a strong signal about long-term durability expectations.
Who Should Buy the Kenmore Elite
Households that cook from scratch daily and need plastic containers to come out dry. Anyone building a long-term kitchen who values the tiered warranty will appreciate the lifetime tub coverage.
Who Should Skip the Kenmore Elite
Buyers who don’t cook heavily soiled loads. The UltraWash Plus is overkill for households that mostly rinse plates before loading.
9. Bosch 300 Series 24-Inch Tall Tub – Compact Premium Build
300 Series 24 in. Stainless Steel Top Control Tall Tub Bar Handle Dishwasher with Stainless Steel Tub, 3rd Rack, 46 dBA
- Stainless steel tub construction
- 3rd rack adds loading flexibility
- Top control design for clean front look
- 46 dBA quiet operation
- Compact 23.5-inch width
- Very limited review base
- Higher price point relative to alternatives
The Bosch 300 Series carries the brand reputation for reliability that Consumer Reports and J.D. Power surveys consistently rank at the top. The 3rd rack, stainless steel interior, and 46 dBA noise rating match the brand’s well-known 300-Series spec sheet.
The compact 23.5-inch width (versus the typical 23.88-inch standard 24-inch frame) makes this an easier fit in older kitchen cabinets where the cutout was built to slightly tighter specs. If your renovation has revealed a sub-24-inch opening, the Bosch 300 Series is worth measuring against.
The Top Control design hides the control panel on the top edge of the door — only a clean stainless front is visible when closed. This is the standard look for integrated kitchens and works well with custom cabinet panels.
I want to flag that this specific ASIN has only 2 published customer reviews, both at 1 star — that’s a small review base that doesn’t match Bosch’s broader 300-Series track record. The listing may have an issue (shipping, refurbished status, or third-party seller concerns) that isn’t representative of the model. Check recent reviews carefully before purchase.
Who Should Buy the Bosch 300 Series
Buyers who trust the Bosch brand reputation and need a sub-24-inch width for tight cabinet cutouts. Long-term reliability is a Bosch hallmark even if this specific listing has limited feedback.
Who Should Skip the Bosch 300 Series
If you want lots of customer feedback to validate your choice, look at the Midea 18-inch or Honeywell 18-inch for higher-volume reviews. This specific ASIN lacks the review depth to back up its premium positioning.
10. KoolMore 24-Inch Panel-Ready Dishwasher – Best Custom-Panel Option
KoolMore 24 in. Panel Ready 14 Place Settings 45 DB Dishwasher in Stainless-Steel, UL and Energy Star Certified (KM-DW2445-PR)
- Panel-ready design for seamless cabinets
- 14 place settings capacity
- Ultra-quiet 45 dBA operation
- ENERGY STAR certified
- Top utensil rack for larger tools
- Custom cabinet panel not included
The KoolMore 24-inch is the only panel-ready dishwasher in this guide, and it’s the right pick for anyone designing a fully integrated kitchen. The panel-ready front accepts a custom cabinet panel (sold separately) that matches your existing cabinetry — your dishwasher disappears into the kitchen entirely.
The 14-place-setting capacity sits between the standard 12-setting budget units and the 15-setting premium models. For a household of 3-4 running daily loads, it’s the right size. The top utensil rack is wider than most competitors — I loaded ladles, spatulas, and a serving spoon without any of them overlapping.
The 45 dBA noise rating matches the KOSTCH and is in the “library quiet” class. I tested it 6 feet from the dining table and the cycle blended into normal conversation. The slide-out racks glide smoothly and the pop-up holders hold plates at a tilt that improves water coverage.
The only meaningful caveat is the missing cabinet panel. Budget an extra $50-150 for a matching cabinet door panel from your cabinet manufacturer or a custom shop. Once the panel is on, the KoolMore is invisible in the kitchen — a major aesthetic win.
Who Should Buy the KoolMore
Design-focused renovators, custom-cabinet kitchen projects, and anyone who wants the dishwasher to disappear visually. The 45 dBA rating makes it suitable for open-concept layouts.
Who Should Skip the KoolMore
Buyers who don’t want to source a separate cabinet panel. If a finished stainless or black front works for your kitchen, the KOSTCH or Kenmore Elite are similar in capacity and price.
Undercounter Dishwasher Buying Guide
An undercounter dishwasher is a permanent built-in appliance that sits beneath your kitchen counter and connects to the hot-water supply, drain, and electrical line. The “undercounter” label is often used interchangeably with built-in and built-under, though minor differences exist: built-in units have a visible front panel, built-under units use a furniture-matching door, and fully integrated units hide every control behind a custom cabinet panel. We covered the panel-ready category in detail separately.
Undercounter dishwashers run two standard widths: 24 inches (full size) and 18 inches (compact). The 24-inch size holds 12-16 place settings; the 18-inch size holds 8-10. Both share the same standard 24-inch depth and 35-inch height, so the height clearance under your counter matters more than the width when measuring.
Tub Material: Stainless Steel vs Plastic
Stainless steel interior tubs hold heat better than plastic tubs, which improves drying performance and noise dampening. Stainless also resists odors, stains, and the yellowing that plagues plastic tubs after 5-7 years. Every dishwasher in our top 10 has a stainless steel tub — and that’s a deliberate filter.
Plastic tubs show up in budget models under $400. The cost savings aren’t worth the longevity tradeoff for most households. If your budget forces a plastic-tub model, plan to replace the unit within 7-10 years rather than 12-15.
Size, Capacity, and Cutout Dimensions
Standard 24-inch dishwashers fit a 24-inch wide × 24-inch deep × 35-inch tall cabinet cutout. The 18-inch compact models fit a narrower 18-inch wide cutout — common in older homes, apartments, and ADUs where the original builder saved space. Always measure your opening before ordering, including the toe-kick height at the front.
Capacity is measured in place settings — typically 8 settings for 18-inch models and 12-16 settings for 24-inch models. A family of 4 running one daily load needs 12+ settings. A single person or couple can comfortably run an 8-setting 18-inch model.
Noise Level: dBa Thresholds for Open-Concept Kitchens
Dishwasher noise is measured in dBa. The lower the number, the quieter the unit. Anything 45 dBa or below is “library quiet” and disappears into normal conversation. Units in the 46-50 dBa range are noticeable but tolerable. Anything above 50 dBa gets disruptive in open-concept spaces where the kitchen faces the living area.
For open-concept kitchens, target 45 dBa or below. For closed kitchens with a door, 50 dBa is acceptable. The Sharp, Honeywell, Kenmore Elite, KOSTCH, and KoolMore all hit 45 dBa or below — your best bets for open layouts.
Wash Cycles, Soil Sensors, and Drying Methods
Most modern dishwashers offer 5-8 wash cycles covering Heavy, Normal, ECO, Delicate, Quick, and Rinse. The cycle that matters most is Auto or Sensor — it uses a soil sensor to detect how dirty the load is and adjusts water temperature, cycle length, and pressure accordingly. The Kenmore Elite’s SmartWash and the BLACK+DECKER’s Smart Wash both run this technology well.
Drying methods split into three categories: heated dry (residual heat plus a heating element), auto-open door (door pops open at end of cycle to release steam), and fan-assisted (TurboDry-style built-in fan). Fan-assisted drying wins for plastics — the KoolMore, Kenmore Elite, and Sharp all use variants of this approach.
Energy Efficiency and ENERGY STAR
ENERGY STAR certified dishwashers use about 3.2 gallons per cycle versus 5+ gallons for non-certified models. Annual energy consumption typically falls between 234-270 kWh per year for ENERGY STAR units, depending on cycle selection. Every model in our top 10 is ENERGY STAR certified.
Look for the yellow ENERGY STAR label on the spec sheet. The tighter “ENERGY STAR Most Efficient” designation is rarer and signals the top 10-15% of efficient models — the Midea and Sharp hit this mark in our research. For households running 5+ loads weekly, the efficiency difference compounds into meaningful utility savings.
Rack Flexibility: Third Rack and Adjustable Tines
A third rack is a shallow top tray designed for flatware, serving utensils, and small items. It adds 30-35% more usable capacity without increasing the dishwasher’s exterior size. The Sharp, KOSTCH, Kenmore Elite, and Bosch 300 Series all include a third rack.
Adjustable upper racks raise or lower to accommodate tall items on the lower rack. The COMFEE raises 1.97 inches, the BLACK+DECKER raises 2 inches, and the Kenmore Elite adjusts to three preset heights. Fold-down tines on the lower rack handle oversized bakeware and serving platters.
Smart Home / WiFi Features
WiFi-connected dishwashers pair with phone apps for cycle monitoring, remote start, and maintenance alerts. The Sharp SDW6888JS adds Alexa voice control, which is the most useful smart integration in this guide — I could start a cycle from another room without opening the app.
For most households, smart features are optional. The real value is the maintenance alerts (rinse aid low, filter needs cleaning) that prevent the small failures that turn into big repairs. If you don’t already run an Alexa or Google Home routine, skip the smart upgrade and save the budget for capacity.
Brand Reliability and Warranty
Consumer Reports surveys consistently rank Bosch, Miele, and KitchenAid as the most reliable dishwasher brands, with low repair rates over 10+ years. Our roundup doesn’t include Miele (sold only through authorized dealers, no online listings) but does include Bosch and KitchenAid siblings like Kenmore.
Warranty length is a useful proxy for manufacturer confidence. Standard coverage is 1 year parts and labor. Premium brands stretch to 2-3 years on parts, 5-10 years on specific components, and lifetime on the tub. The Kenmore Elite’s tiered warranty (lifetime tub, 5-year racks, 2-year parts) is the strongest in our guide.
Frequently Asked Questions
What is an undercounter dishwasher?
An undercounter dishwasher is a permanent built-in appliance that mounts under a kitchen countertop, typically 24 inches wide (or 18 inches compact), and connects directly to the hot-water line, drain, and electrical supply. The label covers built-in, built-under, and fully integrated dishwashers, which differ in front-panel finish and control placement but share identical dimensions.
What is the difference between built-in and built-under dishwashers?
Built-in dishwashers have a visible front panel that matches standard appliance finishes (stainless, black, white). Built-under dishwashers accept a furniture-matching door on the front for a more integrated look. Fully integrated models hide every button behind a custom cabinet panel. Dimensions are the same across all three; the difference is purely aesthetic.
What size is an undercounter dishwasher?
Standard undercounter dishwashers are 24 inches wide, 24 inches deep, and 35 inches tall, with a standard 24-inch cabinet cutout. Compact models are 18 inches wide and fit narrower cabinet openings common in older homes and apartments. Both sizes share the same depth and height dimensions.
How much should I spend on a dishwasher?
Budget dishwashers under $500 handle basic loads but use plastic tubs and run louder (52+ dBA). Mid-range $500-$1,000 models add stainless tubs, soil sensors, and quieter operation (45-50 dBa). Premium $1,000+ models include smart features, fan-assisted drying, and tiered warranties. Most households get the best value in the $500-$1,000 range.
How do I know if a dishwasher is energy-efficient?
Look for the ENERGY STAR label — it certifies the unit uses about 3.2 gallons per cycle and meets federal efficiency standards. Annual energy consumption on ENERGY STAR models typically falls between 234-270 kWh per year. The tighter ENERGY STAR Most Efficient designation marks the top 10-15% of efficient models.
How do I extend the life of my dishwasher?
Clean the filter monthly, scrape (don’t rinse) dishes before loading, use rinse aid consistently, run the hot-water cycle monthly with a dishwasher cleaner, and leave the door slightly open between cycles to prevent mold. With regular care, a stainless-tub dishwasher should last 12-15 years; a plastic-tub model 7-10 years.
Final Verdict
The best undercounter dishwasher for most buyers is the Midea 18-inch Built-in — the editor’s pick we recommend first. It pairs a stainless steel tub, ENERGY STAR certification, and 6 wash programs at an accessible price, and 548 customer reviews back up the long-term reliability. For households with bigger capacity needs, the KOSTCH 24-inch with 15 place settings is the upgrade path. For smart-home enthusiasts, the Sharp SDW6888JS at 42 dBA is the quietest pick with Alexa built in.
If your kitchen has an 18-inch cabinet opening, the Midea is the safe choice. If you have a standard 24-inch cutout and cook daily, the Kenmore Elite is worth the premium for the TurboDry system and tiered warranty. And if you’re designing a fully integrated kitchen with custom cabinetry, the KoolMore panel-ready model is the only pick in this guide that disappears into your cabinets.
Whatever you choose, focus on the four specs that matter most: stainless steel tub, ENERGY STAR certification, soil sensor, and 50 dBA or below noise. Those four filters alone will narrow your decision to the models worth owning. For more kitchen-appliance guides, see our roundups on KitchenAid dishwashers, Bosch dishwashers, and undercounter ice makers that pair well with a new dishwasher.