Small bathroom remodel cost

A small bathroom remodel costs $4,000 to $15,000, with a typical job around $6,500. A powder room refresh is at the bottom of that; a 40 square foot full bath taken back to the studs is at the top.

Small bathrooms are the clearest case in home improvement of a project not scaling with size. A bathroom half the size does not cost half as much, and understanding why saves a lot of disappointment when the quotes arrive.

Why small does not mean cheap

Every bathroom needs the same things: a plumber, an electrician, a tiler, a waterproofing system, a permit, and fixtures. Those costs are largely fixed. What scales with size is the tile, the flooring and a little labour, and those are the smallest parts of the bill.

There is also a penalty that runs the other way. A tiler working in a 5 by 7 room cannot get out of their own way. Materials come in through a doorway one piece at a time, two trades cannot work at once, and every cut is a fitted cut. Small rooms are slower per square foot, not faster.

The result is that per square foot, a small bathroom is the most expensive room in a house.

What each version costs

A powder room, with no shower or tub, is a genuinely cheap room to renovate because there is no waterproofing and no wet trade beyond the floor. That is the one place in a bathroom budget where small really does mean cheap.

Where a small budget is best spent

If you are choosing what to spend on in a small bathroom, the order that gives the most back:

Waterproofing. Invisible, non-negotiable, and the only line that costs catastrophically to get wrong. A proper membrane system behind the tile.

Light. Small bathrooms live or die on light. A decent ceiling fixture plus a light at the mirror, rather than one dim fitting overhead, transforms the room for $300 to $800.

The extractor fan. A properly sized, properly ducted fan vented outside, not into the attic. It prevents the mould that makes a bathroom feel old. $250 to $700.

The vanity and tap. The things you touch. Visible quality here reads as a quality room.

Tile, last. Large-format tile makes a small room look larger and has fewer grout lines to clean. Plain tile laid well beats expensive tile laid badly, every time.

Tricks that actually work in a small room

A wall-hung vanity shows floor underneath, which makes the room read larger, and it is easier to clean under.

A shower curtain or a single fixed glass panel rather than a framed enclosure. Less visual clutter, and $400 to $1,200 cheaper.

A pocket door or an outward-opening door, if the wall allows, buys back the floor area the door swing eats.

Recessed shelving built into the stud cavity gives storage without taking room. It costs $300 to $900 and is worth more than that in a room this size.

Continuing the floor tile into the shower with a curbless entry makes the floor read as one surface. It costs more, because the floor has to be sloped, but it is the single most effective change in a tiny bathroom.

What to be careful about

Do not move the toilet unless you must. It is the most expensive fixture to relocate, and in a small bathroom the gain is usually inches.

Do not skip the permit because the room is small. Jurisdictions care about plumbing and electrical work, not floor area.

Do not tile over tile in a wet area. It hides whatever is happening underneath and adds thickness that fixtures then have to be shimmed around.

Be realistic about the only bathroom. If this is the house's only bathroom, three weeks is a long time. Ask the contractor to sequence the toilet back in early, which most will do.

Frequently asked questions

How long does a small bathroom take?

Two to three weeks for a pull-and-replace, three to four for a gut. It is not faster than a large bathroom by much, because the sequence of trades is the same.

Is a prefabricated shower unit cheaper than tile?

Considerably: $800 to $2,500 fitted against $3,500 to $8,000 for tiled. It is also faster and, done properly, less likely to leak. The trade-off is appearance and resale perception, and in a small secondary bathroom that trade is often worth making.

Can I do any of it myself?

Painting, fitting a mirror, changing a light fixture and fitting a vanity are all reasonable homeowner jobs. Tiling a wet area is not, unless you have done it before: waterproofing is unforgiving and the failure appears two years later inside the wall.

Will it add value?

A dated bathroom is a reason buyers discount a house, so bringing one up to standard usually recovers most of its cost. Spending $25,000 on a small secondary bathroom does not.

What if I find rot?

Budget for it in advance. Subfloor repair around a toilet is $500 to $2,500 and it is common in older bathrooms, because a slow flange leak takes years to show. Ask the contractor to price it as a rate per square foot in the contract so the number is agreed before anyone is standing in the room with the floor open.