Plumber in Detroit, MI: written quotes on one scope

For a Detroit plumbing job, request written quotes against one scope.Detroit's permit page sets out a permit exemption for plumbing work (read 1 November 2026), quoted below.90.3% of Detroit'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: 1 November 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--mi--detroit&utm_source=us&utm_medium=page&utm_campaign=hire&page_type=hire&place=detroit%2C+MI#job=plumbing%20job
Prompt for any AI, with your job

Open it in your assistant

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Key facts for hiring a plumber in Detroit

Detroit's permit page: a permit rule for water service line replacement (read 17 October 2026), quoted below.
Half of Detroit's homes were built in 1947 or earlier (Census ACS 2020-2024).
Detroit's homes by age: 77.8% (±1.0 points) were built in 1959 or earlier, 12.5% (±0.5 points) from 1960 to 1979, 5.3% (±0.3 points) from 1980 to 1999 and 4.5% (±0.3 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 Detroit.
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 Detroit

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 the Detroit permit exemption quoted below covers your plumbing work, or the job needs a permit
Who pulls the Detroit permit for water service line replacement, and when the inspection is booked
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 Detroit?

Detroit's permit page (read 1 November 2026):

“Plumbing work shall not be started until a permit for such work has been issued by the appropriate enforcing agency.”
“A permit is not required for repairs which involve only the working parts of a faucet or valve or clearance of stoppages provided alterations are not made in the existing piping or fixtures.”

Open Detroit's source page

Detroit's permit page (read 1 November 2026): “Installation must be left uncovered and assessable for inspection.” Open Detroit's source page

Detroit's permit page (read 17 October 2026): “DWSD Engineering Review and a Permit is required before carrying out any of the following activities:” “Replacing an existing water service line”. Open Detroit's source page

What in Detroit 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 Detroit-Warren-Dearborn, MI area, May 2025: $41.53 (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

Detroit permit page, read 1 November 2026: detroitmi.gov
Detroit permit page, read 17 October 2026: detroitmi.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 OEUM001982000000047215208), 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.