Residential construction

How do you price a bathroom remodel?

Price bathrooms from labor hours and real material quotes, include the fixed costs every job carries no matter how small the room, price waterproofing and tile carefully, and protect yourself against what is under the old floor.

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Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

To price a bathroom remodel, estimate the labor hours for each phase (demo, plumbing, electrical, framing, waterproofing, tile, fixtures, paint), price materials from the actual products or clear allowances, and then add the fixed costs that every bathroom carries regardless of size: permit, dumpster, protection, supervision, trip time, and cleanup. Carry a plan for rot and water damage, which bathrooms hide more than any other room, and add overhead and profit as a markup that produces your target margin. A small bathroom is not a cheap bathroom. It packs the same trades and inspections into fewer square feet.

Bathrooms look simple on a walkthrough. Then demo starts and the subfloor around the toilet is soft, the shower valve is not up to current requirements, and the tile layout needs another day because the walls are out of plumb. Pricing bathrooms well means pricing for the work you cannot see yet.

What makes bathrooms different from other remodels

  • Fixed costs dominate. A 40 square foot hall bath needs a permit, a dumpster, plumbing and electrical trips, and inspections just like a primary bath twice its size.
  • Tile labor drives the number. Small tile, niches, benches, patterns, and curbless showers multiply hours.
  • Waterproofing is a system. Shower pans, membranes, and flood tests take time and must be done right, because a leak shows up after you are paid.
  • Layout changes are expensive. Moving a toilet or drain means cutting floor framing and rerouting waste lines.
  • Water damage is common under tubs, toilets, and shower pans in older homes.

Step by step: pricing a bathroom

1. Inspect for the hidden problems first

Press on the floor around the toilet and tub. Look at the ceiling below if there is one. Check the age of the supply and waste lines, the shower valve, the exhaust fan duct, and whether there is a GFCI-protected circuit. Note the year built: work that disturbs paint in a home built before 1978 falls under EPA's Renovation, Repair and Painting rule, so plan for lead-safe setup and cleanup in the price.

2. Decide the layout and fixture list

Keep fixtures in place or move them, and know which before you price. Name each fixture by model or carry an allowance. Wall-hung toilets, linear drains, and thermostatic valves add rough-in labor, not just material cost.

3. Price tile by square footage and complexity

Measure floor tile, wall tile, and shower tile separately. Add waste for cuts and pattern. Price setting labor by your own crew's production on similar jobs, with a factor for small formats, mosaics, niches, and outside corners. Add the waterproofing system as its own line with material and labor.

4. Add the fixed job costs

List the general conditions: permit, dumpster, protection, supervision, travel, and cleanup. On a small bath these can be a large share of the total, which is exactly why square-foot pricing fails here.

5. Price the unknowns

Either carry a contingency for subfloor and framing repair or write a unit price into the contract (for example, a price per sheet of subfloor replaced) so the homeowner knows the cost before you open the floor. Unit prices are often easier for homeowners to accept than an open-ended change order.

6. Set a minimum job price

Calculate the lowest price at which a bathroom covers your fixed costs, overhead share, and profit. Jobs below it either get declined or priced up. The pricing small construction jobs guide walks through the math.

7. Add overhead and profit

Convert your target gross margin to a markup on cost (markup equals margin divided by one minus margin) and apply it to the full cost, including subs and materials. See how to set construction markup and profit margin.

Worked example: a hall bath tub-to-shower conversion

Here is an example estimate for converting a 5 by 8 hall bath tub to a tiled walk-in shower, keeping the toilet and vanity locations. The numbers are illustrations, not market rates.

Example bathroom remodel estimate (contractor cost)
LineCost
Demo, protection, haul-off$1,500
Plumbing: new valve, drain relocation within shower, fixture trim$3,400
Electrical: GFCI circuit, fan, vanity light$1,300
Framing: niche, blocking for grab bars$600
Waterproofing system and flood test$1,100
Tile material (allowance) and setting labor$6,200
Vanity, top, toilet, mirror (allowances)$2,700
Glass enclosure (supplier quote)$1,800
Drywall, paint, trim$1,100
Permit, dumpster, supervision, cleaning$2,300
Total cost$22,000

The contractor targets a 32 percent gross margin, which needs a markup of 0.32 divided by 0.68, about 47 percent. The price is $22,000 times 1.47, about $32,350. The contract also carries a unit price for replacing damaged subfloor per sheet, so if demo finds rot around the toilet, the homeowner already knows the cost.

Notice the fixed-cost line. At $2,300 it is more than 10 percent of cost on a 40 square foot room. On a primary bath twice the size, that line barely moves. That is why the same contractor can be priced right on a large bath and lose money on a small one if they use the same per-square-foot number.

Powder room, hall bath, and primary bath: pricing differences

The same method works for every bathroom, but the cost drivers shift with the room. A powder room has no shower, so waterproofing drops out, but fixed costs and finish expectations (a statement vanity, wallpaper, a wall-hung toilet) can still make it expensive for its size. A hall bath is usually a tub or tub-to-shower job where the shower system and tile drive the price. A primary bath adds a larger shower, often a freestanding tub with its own floor-mounted filler, double vanities, more lighting, and sometimes heated floors that need a dedicated circuit. Price each type from your own past jobs of that type, and keep separate history for each so a cheap powder room does not drag down your primary bath numbers.

Mistakes to avoid

  1. Using one square-foot price for every bathroom size.
  2. Pricing tile setting at the same rate for 24 by 48 porcelain and 1 inch hex mosaic.
  3. Leaving waterproofing inside the tile line, where it gets squeezed when the price feels high.
  4. No plan for rot. A soft floor found on day one with no clause in the contract becomes a fight.
  5. Forgetting the glass lead time. A shower without its door is not finished, and the final payment usually waits for it.
  6. Taking a small bath below your minimum because the calendar has a gap.

Templates and tools that help

Build the estimate on the remodeling estimate template and bill from the remodeling invoice template. For the kitchen version of this process, see how to price a kitchen remodel. Smart Business Automator tracks job costs against the estimate for each bathroom, so you can see which bath sizes and finish levels actually make money. See job costing and WIP automation.

Frequently asked questions

Why do small bathrooms cost so much per square foot?

Because the fixed costs (permit, dumpster, plumbing and electrical trips, inspections, supervision, cleanup) stay roughly the same while the square footage shrinks. Those costs get spread over fewer square feet.

How should I price rotted subfloor I cannot see yet?

Either carry a contingency or put unit prices in the contract for common repairs, such as a price per sheet of subfloor. Document what you find with photos before you fix it.

Should waterproofing be a separate line on a bathroom estimate?

Yes. It is a distinct system with its own material and labor, and showing it separately helps the homeowner see why it matters and keeps it from being cut.

What markup should I use on a bathroom remodel?

Pick the gross margin you need to cover overhead and profit, then convert it: markup equals margin divided by one minus margin. Apply it to the full cost, including subs and materials.

Sources

  1. U.S. EPA: Lead Renovation, Repair and Painting Program
Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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