Small bathroom remodel cost.
A small bathroom (around a 5x8 layout) costs less than a primary bath, but tight quarters and plumbing still drive the price.
Small bathroom remodel cost by type
| Cosmetic refresh (fixtures, paint, vanity) | $3,000 – $7,000 |
| Full small remodel | $7,000 – $15,000 |
| High-end small remodel | $12,000 – $22,000 |
Typical installed range for a 35 sq ft project. Adjust the estimator above for your own size and options.
Cost per square foot runs backwards in a small bathroom
A bathroom has a fixed shopping list: a toilet, a vanity, a shower or tub, an exhaust fan, lighting, waterproofing, and every trade in the house showing up for a day or two. That list costs roughly the same in 35 square feet as in 80, so spreading it across less floor drives the per-square-foot number up rather than down. A 15 square foot powder room can exceed $200 per square foot while a 50 square foot bath averages far less at the same finish level. Budget the fixture list and the labor days, then check the per-foot figure, never the reverse.
What moves the price on this one
Code clearances, which decide what fits before you shop
The IRC requires 15 inches from the toilet centerline to any wall, fixture, or vanity edge, giving a 30-inch minimum compartment, and 21 inches of clear floor in front of the bowl. In a 5 by 8 room those two numbers plus the door swing eliminate most of the layouts people arrive with. Measuring the clearances costs nothing. Discovering them after the vanity is delivered costs a restocking fee and a week.
Labor share, higher here than anywhere else in the house
Labor commonly runs 40–65% of a small bathroom budget. Demo, plumbing, electrical, tile, and paint each have to mobilize for a room where only one person fits at a time, so there is no efficiency to gain from the small footprint. That is the actual reason a 40 square foot room costs what a much larger bedroom renovation would.
The tub-to-shower decision
Converting a tub to a walk-in shower is the most common small-bath upgrade and commonly runs $2,000–$12,000, prefab at the low end and custom tile at the high end. Staying inside the old tub's 60 by 30 inch footprint is what keeps it at the low end, because the drain does not move. One resale caution: if it is the only tub in the house, removing it narrows your future buyer pool.
Ventilation, which is code and not decoration
The IRC requires bathrooms to have mechanical exhaust of at least 50 cfm intermittent or 20 cfm continuous, discharged outdoors and not into an attic or crawl space. In a small room with a new tile shower, this is what stops mold from appearing in the grout within a couple of years. Plenty of existing fans terminate in the attic, so confirm where the duct actually goes.
Being down to zero bathrooms
A small bathroom is often the only one, or one of two. A full gut typically runs 3–5 weeks of construction plus 2–4 weeks of selection and ordering before that. Ask for a schedule that names the specific days the toilet and the shower are out of service. In a one-bathroom house that answer is worth as much as the price.
What the quote has to spell out
- A dimensioned layout showing the 15-inch and 21-inch toilet clearances and the door swing
- Whether any fixture moves, and specifically whether the toilet drain does
- Exhaust fan cfm rating and where the duct terminates
- Waterproofing method behind the shower walls, named as a product rather than a promise
- Vanity width, since 24, 30, and 36 inches are the realistic options under 40 square feet
- Whether the floor comes up to the subfloor, which is when rot and old plumbing surface
- The number of days the bathroom is unusable, and any temporary arrangements
Where this goes wrong: A price quoted purely as dollars per square foot. In a room this small the fixed costs dominate the area costs, so the per-foot figure is an output of a real estimate, never an input to one. A contractor working from a per-foot rate on a 40 square foot room has priced neither your fixtures nor your clearances nor your layout.
Small bathroom remodel cost: FAQ
How much does a small bathroom remodel cost?
Most small bathroom remodels run $7,000 to $15,000, with a cosmetic refresh as low as $3,000 and a high-end small remodel up to about $22,000.
What's the biggest cost in a small bathroom?
Labor and plumbing. Moving the toilet, sink, or shower to a new spot means opening walls and floors, which can add 20 to 30 percent to the job.
How can I remodel a small bathroom cheaply?
Keep the existing layout, reglaze instead of replacing the tub, and pick stock vanities and off-the-shelf tile. Layout changes are the biggest budget breaker.
How much does a 5x8 bathroom remodel cost?
A 5 by 8 room is 40 square feet, one of the most common small bathroom footprints in American homes. Budget refreshes commonly land near $3,200–$4,800, mid-range work near $7,200–$11,200, and a full gut renovation near $11,200–$15,000 and up. Whether the layout changes is the largest single swing inside those bands.
Why is a small bathroom so expensive per square foot?
Because the cost sits in the fixture list and the trades, not the floor area. A toilet, vanity, shower, fan, lighting, and waterproofing cost close to the same in a small room as a large one, and a plumber, electrician, and tile setter each still have to show up and set up. Divide that by 35 square feet and the per-foot number looks alarming while the total is ordinary.
Can I remodel a small bathroom for $5,000?
It is realistic if every fixture stays where it is. That budget generally covers paint, a prefabricated vanity, a new faucet, showerhead, and lighting, and resilient flooring, with tub refinishing instead of replacement. It does not cover moving plumbing, opening walls, or a custom tiled shower, and any bid promising all of that at that number has left something out.