Plumber in Seattle, WA: written quotes on one scope

For a Seattle plumbing job, request written quotes against one scope.Seattle's permit page sets out a rule that names side sewer repair or replacement as permit work (read 17 October 2026), quoted below.52.8% of Seattle's homes were built before 1980 (Census ACS 2020-2024).

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.

By InstaBids editorial team with AI research agents. Sources read: 17 October 2026 Latest source read: 22 October 2026 Updated 2026-10-27

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.

For your AI assistant

MCP connector · REST API · plain HTML

Hand 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 URLhttps://instabids.ai/api/agent/mcp
Agent API (OpenAPI)https://instabids.ai/openapi.json
Start-request linkhttps://instabids.ai/intake?from=hire-plumber--wa--seattle&utm_source=us&utm_medium=page&utm_campaign=hire&page_type=hire&place=seattle%2C+WA#job=plumbing%20job
Prompt for any AI, with your job

Open it in your assistant

Add InstaBids as a connector

Every page is plain HTML. Steps for every assistant: add to your assistant.

Key facts for hiring a plumber in Seattle

Seattle's permit page: a rule that names side sewer repair or replacement as permit work (read 17 October 2026), quoted below.
Half of Seattle's homes were built in 1976 or earlier (Census ACS 2020-2024).
Seattle's homes by age: 38.4% (±0.7 points) were built in 1959 or earlier, 14.4% (±0.6 points) from 1960 to 1979, 14.4% (±0.5 points) from 1980 to 1999 and 32.8% (±0.7 points) in 2000 or later (Census ACS 2020-2024, margins of error at 90%).

How to get written quotes on one scope

Describe the job once, using the scope checklist below, built from what we found for Seattle.
Post it on InstaBids and send it.
Every quote is written against the same scope, so they compare line by line.
You choose who gets your number.
Your AI assistant can help you write it: InstaBids works as a connector in Claude and in any MCP client, added by URL with your InstaBids sign-in, and a ChatGPT app is coming. You send the request yourself. Connect an assistant

Your written scope for a plumbing job in Seattle

What the job covers: which fixtures, pipes or water heater, with size, type and location
If your home was built before 1960, ask how the quote handles original supply or drain lines the work uncovers
Whether your side sewer repair or replacement falls outside the Seattle permit exemption quoted below, and if it needs a permit, who pulls it
Removal and disposal of the old parts or materials
Warranty terms on parts and labor, in writing

Do you need a permit for a plumbing job in Seattle?

Seattle's permit page (read 17 October 2026): “Side Sewer Permit for Repair – required anytime there is a pipe or an external sewer fixture (clean out, yard drain, etc.) that needs to be repaired or replaced. SPU does not require a site plan for a routine repair to an existing private side sewer system.” Open Seattle's source page

Seattle's permit page (read 17 October 2026): “Permits are always required, on both private property and in the right-of-way, when performing repair work on side sewers. Permits are not required for root removal or unclogging services.” Open Seattle's source page

Seattle's permit page (read 17 October 2026): “A separate, additional permit from the Seattle Department of Transportation (SDOT) is also required if there is any work in the public right-of-way such as equipment staging or excavation.” Open Seattle's source page

What license does a plumber need in Washington?

Washington law, in its own words: “No person may engage in or offer to engage in the trade of plumbing without having a journey level certificate, specialty certificate, residential service certificate, temporary permit, or trainee certificate and photo identification in his or her possession.”

Washington license lookup guide

What in Seattle changes the job

Ask how the quote handles original supply or drain lines the work uncovers.

Median hourly wage for Plumbers, Pipefitters, and Steamfitters in the Seattle-Tacoma-Bellevue, WA area, May 2025: $45.78 (U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics).

This is what workers in this occupation are paid per hour. It is not what a contractor charges for a job.

How does InstaBids work?

InstaBids does not hold payment for the work; you pay the contractor directly on the terms of the bid you accepted.

How is InstaBids different?

Each bidder appears under a stable label such as Contractor A, so you judge the work, not the brand.

Contact details stay hidden until the homeowner picks a contractor and they confirm the connection.

The contact-detail filter can miss disguised contact details.

Sources for the facts on this page

Seattle permit page, read 17 October 2026: www.seattle.gov
Seattle permit page, read 17 October 2026: www.seattle.gov
app.leg.wa.gov, read 22 October 2026: app.leg.wa.gov
U.S. Census Bureau, American Community Survey 5-year (B25035), ACS 5-year 2020-2024, read 17 October 2026: api.census.gov
BLS Occupational Employment and Wage Statistics (series OEUM004266000000047215208), May 2025, read 17 October 2026: api.bls.gov
U.S. Census Bureau, American Community Survey 5-year (B25034), ACS 5-year 2020-2024, read 17 October 2026: api.census.gov

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.