InstaBidsHow much does it cost to remodel a bathtub?
Pacific Northwest National Laboratory: “Finish the walls by installing fiberglass wall panels or tiling the surface.”
Source: Pacific Northwest National Laboratory, read 5 November 2026.
City of Mountain View, California: “Shower compartments and areas above bathtubs must be finished with non-absorbent surface, a minimum of 6 feet (72 inches) above the floor.”
Source: City of Mountain View, California, read 5 November 2026.
Context: all "Remodeled bathroom" jobs
The survey figure below covers all "Remodeled bathroom" jobs, not tub surround replacement or bath liner installation alone.
$7,500 was the median homeowner survey figure for data years 2021-2023 in the United States. For all jobs in the AHS category "Remodeled bathroom", households that hired out the work reported a typical range (middle half of 1,078 American Housing Survey data points, the United States, 2021-2023) of $3,000 to $15,000.
Updated 2026-11-06
InstaBids is an AI-run marketplace for homeowners and property managers: describe a home job once, by chat or through your own AI assistant, add photos, and get multiple written quotes on the same scope, compared apples to apples, with no phone calls or home visits before you pick.
For homeowners, property managers, landlords and HOA boards.
| What was measured | Median | Typical range (middle half) |
|---|---|---|
| For all jobs in the AHS category "Remodeled bathroom", households that hired out the work reported | a median of $7,500 | the typical range (middle half of 1,078 American Housing Survey data points, the United States, 2021-2023) was $3,000 to $15,000 |
How measured: hired-out finished jobs, survey-weighted, not adjusted for inflation. Source: U.S. Census Bureau, American Housing Survey 2023, data read 5 November 2026.
These figures are estimates from U.S. Census Bureau, American Housing Survey 2023, data years 2021-2023, read 5 November 2026, for the United States. They are not a quote, and they are not a promise of what any contractor on InstaBids will charge. Your price depends on your home, the materials and the contractor. Get written bids before you decide.
- Describe it onceBy chat, or through your own AI assistant, and add photos.
- Post it and send itContractors bid in writing on that scope.
- Compare line by lineEvery quote is written against the same scope.
- You chooseContact details stay hidden until you pick and they confirm.
At a glance
- cement boardDOE moisture-resistant backing exampleU.S. Department of Energy, read November 5, 2026
- fluid-applied waterproofingPNNL cement-board surface treatmentPacific Northwest National Laboratory, read November 5, 2026
- 6 feet (72 inches)Mountain View non-absorbent surface heightCity of Mountain View, California, read November 5, 2026
For your AI assistant
MCP connector · REST API · plain HTMLHand any of these to your assistant and it can help you write this job's request; you send the request yourself. What you type in the job box above goes into the prompt these buttons carry. The connector asks you to sign in to your InstaBids account the first time.
- MCP connector URL
https://instabids.ai/api/agent/mcp - Agent API (OpenAPI)
https://instabids.ai/openapi.json - Start-request link
https://instabids.ai/intake?from=cost-shower-tub-surround-or-bath-liner&utm_source=us&utm_medium=page&utm_campaign=cost&page_type=cost&job=shower+tub+surround+or+bath+liner - Prompt for any AI, with your job
- ChatGPTOpens with the prompt
- ClaudeOpens with the prompt
- GrokOpens with the prompt
- GeminiCopies the prompt, then opens
Every page is plain HTML. Steps for every assistant: add to your assistant.
What tub surround replacement includes
Where a quote below names a city or county, it is that office's own rule, shown as one example; the permit office for your home may set different rules.
| What the source says | Where it comes from |
|---|---|
| U.S. Department of Energy: “With walls behind tub and shower enclosures made of tile or panel assemblies with caulked joints, special protection is needed, so install cement board or an equivalent moisture-resistant backing material.” | U.S. Department of Energy, read 5 November 2026. |
| Pacific Northwest National Laboratory: “Cement board is not waterproof; it must be coated with a fluid-applied waterproofing, or a water-resistive barrier must be applied behind it that allows drainage (See the guide Cement Board Installed Behind Tile and Panel Tub and Shower Enclosures).” | Pacific Northwest National Laboratory, read 5 November 2026. |
On InstaBids, describe the surround panels and the backing behind them in the same written scope.
Line items a written bid should list
- U.S. Department of Energy: “If the tub or shower is on an exterior wall, make sure that any piping or wiring penetrations through the walls behind the tub and enclosure are tightly air-sealed and that the wall cavities are properly insulated. These items need to be done before installing cement board or equivalent.”
Source: U.S. Department of Energy, read 5 November 2026.
InstaBids lets you describe exterior-wall sealing before the new surround goes in so contractors bid on that sequence in writing.
How to compare written bids like for like
Ask every contractor to bid in writing on the same line items listed above, then compare the written bids line by line.
Pacific Northwest National Laboratory: “The insulation behind the tub or shower should be equivalent to the insulation in the rest of the exterior walls and should be covered with an air barrier of cement backer board, rigid foam insulation, or non-paper-faced drywall that is sealed at the edges and seams to provide a continuous air seal.”
Source: Pacific Northwest National Laboratory, read 5 November 2026.
On InstaBids, name the insulation and air barrier in your surround description so each written bid addresses that assembly.
Do you need a permit for tub surround replacement?
City of Mountain View, California: “A permit is required for bathroom remodels that include replacement of the tub/shower enclosure.”
Source: City of Mountain View, California, read 5 November 2026.
In your InstaBids scope, include the enclosure replacement and any plumbing changes for contractors to address in writing.
What inspections does tub surround replacement need?
Pacific Northwest National Laboratory: “Insulation and air barrier installation should be inspected by the site supervisor.”
Source: Pacific Northwest National Laboratory, read 5 November 2026.
On InstaBids, describe the inspection of insulation behind the surround as part of the job contractors bid on in writing.
Get written bids
Contractors who take part bid on one written scope card, so nobody visits before you see any prices.
Sources for the figures on this page
- U.S. Census Bureau, American Housing Survey 2023, https://www.census.gov/programs-surveys/ahs/data/2023/ahs-2023-public-use-file--puf-.html, read 5 November 2026. U.S. government work; no endorsement implied.
- U.S. Department of Energy, bsesc.energy.gov/energy-basics/tubs-cement-board-behind-tile-and-panel-tub-and-shower-enclosures, read 5 November 2026.
- Pacific Northwest National Laboratory, basc.pnnl.gov/resource-guides/walls-behind-showers-and-tubs, read 5 November 2026.
- City of Mountain View, California, developmentpermits.mountainview.gov/residential/bathroom-remodel, read 5 November 2026.