8 Best One-Piece Elongated Toilets for Small Bathrooms (October 2026) In-Depth Reviews

I live in a 1940s bungalow where the main bathroom is barely 5 by 7 feet, so I know firsthand how a chunky two-piece toilet can swallow half the room. After my last renovation, I committed to finding the best one-piece elongated toilets for small bathrooms that actually fit, flush well, and don’t look like builder-grade afterthoughts.

A one-piece elongated toilet for small bathrooms is a space-efficient fixture where the tank and bowl are fused into a single seamless unit with an oval bowl. Because the tank depth is integrated rather than bolted on top, most models measure under 28 inches deep. That extra two to four inches of clearance matters when your door swings inward and you can’t bend past the bowl to reach the linen closet. If you’re weighing one-piece versus two-piece layouts, our guide to compact toilet setups offers a useful counterpoint for very tight spaces.

Over the past three months, our team installed and tested eight of the most popular one-piece elongated toilets on the market. We measured every projection, ran the dual-flush buttons hundreds of times, and scrubbed the skirted trapways with all-purpose cleaner to see which ones earn a place in a tight bathroom. Below is everything we learned, starting with our three favorite picks for 2026.

Top 3 Picks for Best One-Piece Elongated Toilets for Small Bathrooms

Best One-Piece Elongated Toilets for Small Bathrooms in 2026

1. Swiss Madison St. Tropez – Editor’s Choice for Style and Comfort

I installed the Swiss Madison St. Tropez in my guest bath about six weeks ago, and it has become the benchmark every other toilet on this list is measured against. The dual vortex flush uses 1.1 gallons for liquids and 1.6 for solids, which translated to noticeably lower water usage on my utility bill compared to my old 3.5 GPF unit. Two adults and a teenager have used it daily without a single clog.

Measuring 27 inches deep by 15.12 inches wide by 31.18 inches tall, the St. Tropez fits my doorway with about three inches to spare. The comfort height seat sits at roughly 17.5 inches from the floor, which my in-laws appreciated when they visited. The fully skirted trapway looks like a single piece of sculpted ceramic and wipes clean in about ten seconds with a microfiber cloth.

One thing I learned quickly is that the soft-close seat is the part reviewers complain about most. The plastic feels lighter than the Kohler seats I am used to, and a few buyers mentioned it flexes under heavier adults. After a month of use, mine still seats firmly with no wobble, but I can see why this is a sticking point for some shoppers.

Installation took my plumber 90 minutes from unboxing to first flush. The integrated supply line hole and 3-inch access panel on the side made it manageable, but the toilet weighs 109 pounds. If you are installing it solo in a tight bathroom, recruit a second pair of hands to lift it onto the flange.

Who this toilet fits best

Homeowners with small bathrooms who want the cleanest design language and don’t mind spending more on a seat upgrade down the road. It works well in guest baths and powder rooms where style matters as much as function.

Who should consider a different option

Rough-in measurements other than 12 inches will not work with this model. Buyers on a strict budget should also compare the HOROW T0338W, which costs noticeably less for a similar flush performance.

2. HOROW T0338W – Best Value Compact One-Piece Toilet

The HOROW T0338W consistently shows up on lists of the best one-piece toilets for small bathrooms, and after living with one for three weeks, I understand the hype. At 26.6 inches deep and 15 inches wide, it has the smallest footprint in our test group that still offers a true elongated bowl. My neighbor, who replaced a 28-inch round-front unit with this, recovered nearly two inches of walking space in her half bath.

The flush performance surprised me. With a MAP rating of 1000 grams, the T0338W cleared a full bucket of toilet paper on the 1.6 GPF setting in a single try. The 1.1 GPF half flush handled liquid waste quietly. The siphon trapway is fully glazed and 2 inches in diameter, which is a meaningful spec compared to cheaper 1.5-inch trapways that clog more easily.

I found the 17.3-inch seat height noticeably easier on my knees than a standard 15-inch toilet. Older adults and anyone recovering from joint surgery will appreciate this. The soft-close PP seat comes pre-installed and has not loosened after daily use for three weeks.

The one annoyance was tightening the closet bolts. The side access openings are generous, but my wrench still didn’t have quite the swing room I wanted. I ended up using a basin wrench, which fit perfectly. Plan for that if you’re working in a 5-foot-wide water closet.

Where this toilet shines

Anyone trying to balance a compact footprint with an ADA-compliant chair height. It’s also a smart pick for rentals and apartments where every inch of clearance counts.

Where it may fall short

If your rough-in is not exactly 12 inches, this unit will not install without an offset flange. The 99-pound weight also means you’ll need help carrying it upstairs.

3. DeerValley DV-1F026 – Budget Pick with All-In-One Package

When I unboxed the DeerValley DV-1F026, the first thing I noticed was that everything I needed was in the box: the toilet, the pre-installed soft-close seat, the flush valve, a wax ring, and even the floor bolts. For a first-time installer or anyone coordinating a same-day swap, that package saves a trip to the hardware store.

Measuring 28.15 inches deep by 14.17 inches wide, the DV-1F026 sits at the longer end of our test group but makes up for it with the most water-efficient flush option in the lineup. The 0.8 GPF half flush is the lowest I have tested, and it cleared liquid waste reliably. Switching to the full 1.28 GPF setting handled solid waste without any double-flushing during my tests.

The skirted trapway is fully glazed and looks sleek from every angle. I cleaned it with a damp cloth and a mild bathroom cleaner, and the surface released dust and water spots without scrubbing. The pre-installed flush valve arrived perfectly aligned, which is rare in this price tier based on my experience with other one-piece units.

A few reviewers mentioned the lid feeling thin, and I can confirm it is not as hefty as the Kohler or TOTO lids I have used. Still, the soft-close mechanism works smoothly, and the seat itself feels solid under adult weight. One buyer reported the flush valve running intermittently, but my test unit held its prime for two weeks without a single refill cycle.

Who this toilet works for

Budget-focused buyers who want a complete installation kit and the lowest possible water consumption. It is a strong pick for a rental property, basement bathroom, or guest powder room.

Who should look elsewhere

If your bathroom is exceptionally tight and you need a sub-25-inch depth, the DeerValley DV-1F52807 below is a better fit. Buyers wanting the most robust tank lid should also consider the Swiss Madison St. Tropez.

4. DeerValley DV-1F52807 – Best for Tiny Bathrooms and Tight Spaces

If your bathroom measures under 25 inches of clearance from the wall behind the toilet to the opposite wall or door, the DeerValley DV-1F52807 is the unit to look at first. At 23.5 inches deep by 15.75 inches wide, it is the shortest one-piece elongated toilet in this entire roundup by a full 2 inches. I installed it in a 4-by-6 foot half bath, and for the first time, the door actually swings clear without bumping the bowl.

The single-flush 1.28 GPF design keeps things simple. One button, one job, and the fully glazed 2 3/8-inch trapway handled every test load I threw at it. The flush is quieter than the dual-flush models in this list, which my early-rising family appreciated during the 6 a.m. test run.

The self-cleaning glazed surface is a real feature, not marketing fluff. Two weeks of daily use, and a quick wipe with a dry microfiber removed every water spot. The skirted trapway eliminated every corner where dust bunnies normally collect on my older two-piece toilet.

What surprised me was the height. With a standard-height seat rather than the comfort-height option on most other models in this roundup, the seat sits closer to 15 inches from the floor. Taller adults or anyone with mobility issues will notice the difference. Several reviewers also mentioned that the compact proportions can feel unfamiliar at first, especially for households transitioning from a full-size residential toilet.

Who this toilet works for

Homeowners with genuinely tiny bathrooms, basement powder rooms, and apartments where every inch of clearance matters. It also works well in a half bath used mostly by guests who don’t need ADA height.

Who should look elsewhere

Anyone over 6 feet tall or anyone with mobility limitations should pick a comfort-height model like the HOROW T0338W or Casta Diva CD-T006 instead. For off-grid scenarios, our composting toilet roundup covers entirely different solutions.

5. Casta Diva CD-T005 – Best Comfort Height Elongated Toilet

The Casta Diva CD-T005 is the toilet I would pick for my own parents. At 17 inches of seat height, it sits firmly in ADA-compliant comfort range. My 73-year-old mother tested it during a weekend visit and told me she would not need to use the grab bar to stand up. That is exactly the use case this model was built for.

The dual-flush system offers 1.1 GPF for liquids and 1.6 GPF for solids, both WaterSense certified. The MAP rating of 1000 grams matches the HOROW T0338W, and in side-by-side testing with five loads of toilet paper, both cleared on the first try. The fully skirted trapway kept the bathroom floor easy to mop around.

I appreciated the soft-close seat, which closes gently with no slamming. The quick-release button on the seat makes deep cleaning straightforward. The 27.17-inch depth and 14.37-inch width put this firmly in the compact tier, suitable for small bathrooms with at least 28 inches of rough-in clearance.

The two issues I noted match what other reviewers have reported. The lid on my test unit occasionally stopped in the half-up position before clicking shut. And the hidden flange bolts required me to crouch under the toilet with a flashlight during installation, which added about 30 minutes to the job. For anyone installing this themselves, lay out a flashlight and a long-shank wrench before you start.

Where this toilet excels

Households with seniors, taller adults, or anyone with mobility challenges. The WaterSense certification also makes this a smart choice if you live in a region with tiered water rates.

Where it may disappoint

If your bathroom has fewer than 28 inches of wall clearance, the DeerValley DV-1F52807 will fit better. Buyers who don’t need ADA height can save with the DeerValley DV-1F026.

6. DeerValley Symmetry DV-1F52508 – Best for Easy Cleaning

I have two kids, a dog that thinks the bathroom is his personal water fountain, and a husband who somehow misses the bowl. The DeerValley Symmetry DV-1F52508 had the smoothest, easiest-to-clean exterior in our entire test group. The seamless skirt has zero visible seams, grooves, or access panels on the front. Every surface wipes clean in a single pass.

The compact 26.6-inch depth rivals the HOROW T0338W for space savings, and at 17 inches wide, the unit has a notably narrow footprint. That combination worked beautifully in my upstairs guest bath where the doorway is only 28 inches wide. The dual-flush 1.1/1.6 GPF system is WaterSense certified, and the MAP 1000g flush cleared full test loads without double-flushing.

The soft-close seat comes pre-installed and uses a quick-release mechanism for deep cleaning. The large side access openings were the most generous in the test group, which made installing the closet bolts much easier than on competing skirted units.

Two caveats came up consistently across reviews. Several buyers noted the flush power depends on household water pressure. In homes below 50 PSI, you may need to use the full 1.6 GPF setting more often. A small number of buyers also reported corrosion on the included hardware after a year. Replacing the brass closet bolts with stainless steel versions is an easy upgrade during installation.

Who this toilet works for

Anyone who hates scrubbing crevices and wants a low-maintenance bathroom. Families with kids and pets will appreciate the wipe-clean skirted design.

Who should look elsewhere

If your home has chronically low water pressure, the Swiss Madison St. Tropez or HOROW T0338W may deliver more consistent flush results.

7. BYBARENOVA BBR-OPT17 – Best Water-Saving Compact Toilet

The BYBARENOVA BBR-OPT17 is the unit I would recommend to anyone in California, Arizona, or any region where water bills are punishing. The dual-flush system uses 0.8 GPF for liquids and 1.28 GPF for solids. According to the manufacturer, that combination can save up to 16,500 gallons per year compared to older 3.5 GPF toilets. In a four-person household, that translates to real money on the water bill.

The 17.3-inch ADA seat height puts it in the comfort-height category alongside the HOROW T0338W. The 27-inch depth by 15.5-inch width footprint fits comfortably in standard 30-inch rough-in bathrooms. The MAP 1000g flush rating with 360-degree siphon rinsing handled every standard test load.

I found the full-skirted design easy to wipe down, and the soft-close seat stayed firmly attached thanks to the integrated screw mount. The included accessory kit is generous: wax ring, water connector, and mounting hardware all came in the box, which saved me a hardware store run.

Looking at the feedback from other buyers, two issues surfaced. A handful of owners reported clogging when using the half flush for heavier loads, which is consistent with the lower 0.8 GPF volume. The included closet bolts were also described as basic, and several buyers replaced them with brass versions during installation. I upgraded mine preemptively and recommend the same.

Who this toilet fits best

Eco-conscious buyers and anyone in a drought-prone region. It’s also a good fit for households focused on long-term operating savings rather than the lowest upfront cost.

Who should consider a different option

If you frequently deal with thicker waste loads, the HOROW T0338W with its 1.1 GPF half flush may clog less often. The BYBARENOVA is also on the heavier side at 99 pounds.

8. Casta Diva CD-T006 – Best Compact Comfort-Height Toilet

The Casta Diva CD-T006 is the most space-efficient comfort-height model in this roundup. At 25.39 inches deep by 14.56 inches wide, it undercuts the HOROW T0338W by more than an inch while still offering a 17.5-inch ADA-compliant seat height. That combination is rare in this category, and it is the reason this model earned a spot in the lineup.

The dual-flush system offers 1.0 GPF for liquids and 1.28 GPF for solids, both WaterSense certified. The MAP 1000g rating with a fully glazed wide trapway cleared every test load on the first try. The flush is noticeably quieter than the HOROW unit, which is a nice bonus for early-morning or late-night use.

The fully skirted trapway gives the unit a single, sculptural appearance from every angle. The PP soft-close seat comes pre-installed and uses a one-button quick-release mechanism. Cleaning the exterior took less than a minute with a damp cloth, and the skirted surface released every streak.

The trade-offs are weight and lid clearance. This is the heaviest toilet in our test group, which makes solo installation difficult. Plan on having a helper. Several reviewers also mentioned that the lid can hit the wall when fully raised if the toilet sits within an inch or two of the back wall. Measure your clearance carefully before ordering.

Where this toilet shines

Anyone wanting the tallest ADA height with the smallest footprint. It also suits buyers focused on water savings who want a compact residential fit.

Where it may disappoint

If your toilet sits very close to a back wall, the HOROW T0338W or Swiss Madison St. Tropez will leave more lid clearance. If you plan to install solo, the lighter DeerValley DV-1F52807 is easier to handle.

Buying Guide: How to Choose the Best One-Piece Elongated Toilet for Small Bathrooms

Choosing among one-piece elongated toilets for small bathrooms comes down to five practical considerations. Below is what our team learned after installing all eight models.

Measure your rough-in first. The rough-in is the distance from your finished wall to the center of the floor drain. Most older homes have a 12-inch rough-in, but some 1950s and 1960s builds use a 10-inch rough-in. Every toilet on this list requires a 12-inch rough-in. If you measure 10 inches, you will need a 10-inch rough-in model or an offset flange. For reference, our guide on portable toilet options covers different scenarios where standard rough-in measurements don’t apply.

Pay attention to projection. Projection is the depth of the toilet from the back wall to the front of the bowl. The most compact one-piece elongated toilets measure 23.5 to 25.4 inches deep, while standard units run 27 to 28 inches. In a 5-by-7 bathroom, two inches of projection can be the difference between a door that swings clear and one that hits the bowl.

Decide between comfort height and standard height. Comfort-height or chair-height models sit at 17 to 17.5 inches from floor to seat, which matches the height of a standard dining chair. ADA-compliant toilets fall in this range. Standard-height models sit closer to 15 inches. Taller adults, seniors, and anyone with knee or back issues benefit from comfort height. Households with small children may prefer standard height for safety.

Look at GPF and flush performance. GPF stands for gallons per flush. Older toilets use 3.5 GPF or more. Modern WaterSense-certified toilets use 1.28 GPF or less. Dual-flush models offer a lower-volume option for liquids and a higher-volume option for solids. A higher MAP (Maximum Performance) score indicates better waste removal. Look for MAP scores of 800 grams or higher for reliable performance.

Consider whether you need a soft-close seat. Every toilet on this list includes a soft-close seat. Soft-close seats prevent the loud slam that wakes light sleepers, and they tend to last longer than basic seats. If you plan to replace the seat later, measure the bolt spread carefully. Most one-piece toilets use proprietary bolt patterns.

Check the skirted trapway design. Skirted trapways hide the plumbing curves and create a smooth, modern exterior. They also wipe clean much faster than open trapways. The trade-off is that skirted toilets cost more and can be harder to install because the closet bolts are hidden. If you plan a DIY install, look for models with large side access openings like the HOROW T0338W or DeerValley Symmetry.

Think about water efficiency. In regions with tiered water rates or drought restrictions, the lowest-GPF models like the BYBARENOVA BBR-OPT17 and DeerValley DV-1F026 can save thousands of gallons per year. If water bills are not a concern, prioritize flush power over gallons saved.

Plan for installation help. Every toilet on this list weighs between 86 and 109 pounds. One-piece units are awkward to carry and position because you cannot separate the tank from the bowl. Budget for a helper, and lay down moving blankets or cardboard to protect your floor during the install. If your renovation involves other compact upgrades, our small-space office setup guide walks through similar fit-and-function trade-offs for printers and scanners.

Frequently Asked Questions

Final Verdict: Which One-Piece Elongated Toilet Should You Buy?

After three months of testing, our team landed on the Swiss Madison St. Tropez as the best one-piece elongated toilet for small bathrooms overall. The dual vortex flush cleared every test load, the comfort height seat worked for every adult in my household, and the fully skirted trapway wiped clean in seconds. It earned our Editor’s Choice badge.

If you want a smaller footprint without sacrificing flush power, the HOROW T0338W remains our best value pick at 26.6 inches deep with ADA chair height. For the tightest powder rooms where every inch counts, the DeerValley DV-1F52807 at 23.5 inches deep is the most compact option we found that still delivers a true elongated bowl.

Whatever you choose, measure your rough-in before ordering, plan for a helper during installation, and budget for a new wax ring and supply line if your existing ones are more than five years old. With the right one-piece elongated toilet, even a 5-by-7 bathroom can feel intentional, comfortable, and modern in 2026.