Today many of us live in small apartments and face the problem of lack of space. Tiny kitchens, tiny bedrooms, tiny kids’ rooms and tiny bathrooms are reality and we should find more and more cool soultions to accomodate everything we need yet get a stylish space, and today I’d like to share one of such ideas, special for small bathrooms.
Why Choose a Toilet Sink Combo for Small Bathrooms?
I used to think my tiny bathroom was a lost cause. It barely fit a toilet and a narrow pedestal sink, and don’t even get me started on storage. But after staying at a small rental that had a toilet sink combo unit, I was blown away. That thing saved so much space. It was one of those wall-mounted styles where the sink is literally built into the toilet tank—super weird at first glance, but actually kind of genius.
One big perk? Water efficiency. Most of these setups let you reuse the water from the sink to fill the toilet tank. I mean, why not rinse your hands and flush with the same water? It’s not just eco-friendly—it also cuts down your water bill (ours dropped by about 15% after installing one at home). Plus, with fewer plumbing connections, installation was quicker and cheaper than I expected.
There’s also something satisfying about how everything fits together. It’s like solving a puzzle. If you’re dealing with a powder room or converting a closet-sized space into a half-bath, these combo units are honestly a lifesaver. I only wish I’d known about them sooner—might’ve saved me from years of elbow-bumping the wall every time I washed my hands.
Modern white vanity, sink and toilet unit.
This modern small bathroom makes the most of its limited space with a sleek wall-mounted toilet, a minimalist white vessel sink, and a compact countertop. The brass faucet is a stylish touch. (@theneutralfamilyhome).
Modern toilet and basin unit for small bathrooms.
Designed for functionality, this bathroom features a smart combination of a countertop sink and a concealed storage cabinet under a wooden surface. It's an efficient yet stylish solution for small apartment bathrooms. (@makemebel.by).
A minimalist powder room that serves its purpose well.
Tiny eco-toilet with a sink in one.
Here is a cool toilet-sink combo idea which looks like a built-in.
Types of Toilet Sink Combos
I didn’t realize how many versions of toilet sink combos existed until I fell into a rabbit hole of YouTube reviews and plumber forums at 2 a.m. There’s way more variety than I thought, and depending on your space—or how weird your bathroom layout is—you’ll want to pick carefully.
The wall-mounted toilet sink combo was the first one I saw in action. It floats above the floor, which not only makes cleaning a breeze (especially if your dog thinks the bathroom is a splash zone), but it also gives the illusion of more space. Perfect for ultra-tight spots. But—and this is a big but—installation can get tricky if your walls can’t support the weight. Ours needed extra bracing.
Then there’s the floor-standing combo, which is more traditional-looking. These usually come with a built-in vanity or cabinet underneath, which is honestly a win for storing toilet paper, extra soap, and random bathroom clutter. I ended up choosing this type for our main floor half-bath because I didn’t want to deal with in-wall plumbing reroutes. Zero regrets.
If you’re the DIY type or just hate spending money, there are modular combo kits you can put together yourself. They’re not quite plug-and-play, but if you’ve got some tools and patience, you can save a few hundred bucks. Just triple-check your plumbing measurements—ask me how I know.
Basin and toilet built-in design.
Geometric sink, toilet and storage space in one.
A tiny first floor bathroom that features a compact toilet/sink combo and a shower.
Curved sculptural combo of a sink and a toilet.
Here is a cool and stylish idea to DIY a water saving combo unit.
Curvy sink with a countertop and a toilet.
Minimalist angled toilet and basin unit.
A tiny toilet room that features everything necessary including a mirror.
A sink and a toile tin one clad with bamboo panels.
When you combine a toilet and a sink you might use wall space for photo frames or some other decor. (Samantha Schoech).
Nowadays you can buy a kit to replace a toilet's reservoir lid with a sink that activates when flushed. It's a great water-saving solution.
Key Features to Consider
Okay, real talk—buying a toilet sink combo isn’t just about whether it fits in your bathroom. I learned the hard way that skipping the “details” section of the product listing leads to a lot of swearing and returning giant boxes. So, here are the features I wish someone had spelled out for me before I hit “buy now.”
Sink size and depth matter way more than I thought. The first combo unit we ordered had this teeny-tiny sink that splashed water everywhere. It looked cute, but washing your hands felt like watering a plant with a shot glass. Look for something at least 4–5 inches deep. And if your bathroom doesn’t have good drainage? Go even deeper.
Faucet style is another overlooked thing. Some come with those automatic, low-flow taps—which are great in theory—but mine made this weird buzzing noise every time it ran. I ended up swapping it for a simple lever faucet with an aerator, and it worked better with our water pressure anyway.
Toilet bowl shape is more about comfort than looks. I had no idea that elongated bowls feel roomier than round ones until I tried both. Elongated takes up a bit more space, sure, but it’s worth it for the extra comfort. Just measure your clearance from the wall before committing.
Also—don’t forget the flush mechanism. Dual-flush buttons are a no-brainer if you want to save water. And if you’ve got curious kids (or clumsy adults), go with a side-mounted button instead of a top one—it’s harder to break.
Oh, and materials? Ceramic looks sharp and cleans easily, but fiberglass is lighter and better for mobile setups. Stainless steel? Great for modern or industrial-style bathrooms, but it shows water spots like nobody’s business.
If I had to sum it up: don’t get distracted by how stylish a unit looks online. Get your tape measure out, check the water flow specs, and seriously—read the reviews about splashback. Your socks will thank you later.
A toilet and a sink combo clad with light-colored wood.
Stylish curved toilet and sink combo.
Even though this combo isn't an one appliance, it's still a great way to save some space (Hannah Brown).
Sleek curved sink+toilet combo.
Toilet and sink unit decorated with bamboo-imitating tiles.
Stylish curved white sink and toilet combo.
Eco-friendly and space-saving toilet and sink combo.
A sink and toilet combo with a black countertop.
A sink with a storage space and counter and a toilet in one unit.
A toilet sink combo is a must have for a nine square feet bathroom where you also need to install a shower.
This is definitely a perfect solution for a tiny powder room.
Did you know you could turn an under stairs space into a small bathroom? Just install a cute toilet sink combo and add a mirror above it.
When you don't want to pay for an expensive combo unit you could use this idea.
Modern sink, toilet and storage drawer combo.
Toilet and basin with a storage drawer in one.
Vanity, sink and toilet unit in one.
White vanity, sink and toilet combo.
This compact toilet & sink unit is a clever solution that also provides some storage space.
A combo unit plus an accent wall made of recycled bottle caps is definitely a good looking solution for a tiny space.
A tiny cottage bathroom that features a porcelain toilet/sink combo and an open shelving unit.
2-in-1 wash basin and toilet unit is a stylish, practical idea if you need to save space in your en-suite.
Wooden unit with a sink, toilet and a storage compartment.
A basin and a toilet combined and clad with grey wood.
You can built your toilet right into a washbasin unit and that would be a space saving solution too.