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How do roofers in Washington get more customers from Google and AI search?

Facts checked November 8, 2026 by Ansh Singh

Short answer: Roofers in Washington get found online with a website that shows their license number, names the towns they serve such as Seattle, Spokane and Tacoma, and collects real local reviews. Licensing runs through the Washington State Department of Labor & Industries (L&I). The state had 973 businesses with staff in this Census category in 2022.

Do roofers need a license in Washington?

In Washington, the licensing body for this work is Washington State Department of Labor & Industries (L&I).

License or registration types named by the state: Contractor registration (general or roofing specialty).

• Roofing is a registered specialty with no separate roofing license.
• A specialty contractor can only work in that specialty and cannot hire subcontractors.
• Registration needs a $15,000 specialty bond or $30,000 general bond, plus liability insurance.

Homeowners can check a license on the state lookup page. Put your number where they will look for it.

Contractor registration in Washington sits with Washington State Department of Labor & Industries (L&I). All construction contractors must register with L&I before they bid, advertise or work. Bond is $30,000 for general and $15,000 for specialty. Liability insurance is $200,000 public plus $50,000 property damage, or $250,000 combined.

License numbers in ads and on websites

Contractors must include their L&I registration number in advertising, bids, estimates, business cards and online ads. Using a false or expired registration number to buy a required ad is a gross misdemeanor (RCW 18.27.020).

What does a year of roofer work look like in Washington?

Publish each seasonal page four to six weeks ahead.

Temperatures: NOAA NCEI nClimDiv statewide data. Job column: our planning suggestion, not survey data.

How many roofing contractors compete in Washington’s main cities?

Competition is tightest around Tacoma (Pierce County), with one business for every 6,361 residents, and loosest around Seattle, at one per 11,244.

Source: US Census Bureau, County Business Patterns 2022 and County Population Estimates 2023. Counts businesses with paid employees only.

How many roofing contractors are in Washington?

The Census Bureau counted 973 businesses with employees in Washington in 2022, in the category “Roofing contractors”. That ranks Washington 5th of 50 states, one of the largest markets in the country, and 4% of the US total. 77% of them have fewer than 10 staff, and 110 have 20 or more.

Together they employ 8,873 people, with an average yearly payroll of $619,848 per business. The three busiest counties hold 52% of them, so competition is packed into a few places.

With 7,812,880 residents (Census, July 2023), that is one business for every 8,030 people, against 13,628 nationally: fewer residents per business than the US average, so more competition for each job.

Washington next to its neighbors

Counties with the most roofing contractors

26 of Washington’s counties have at least one. Source: US Census Bureau, County Business Patterns 2022.

How big are they?

Businesses by number of employees, 2022: 576 with 1-4 staff, 173 with 5-9 staff, 114 with 10-19 staff, 82 with 20-49 staff, 28 with 50+ staff.

Where Washington is growing

New homes and new owners bring new work. Washington's population changed +1.1% from July 2020 to July 2023. The fastest-growing counties with 50,000 or more people:

• Lewis County: 86,154 people, +4.4% since 2020, 10 roofing contractors
• Benton County: 215,219 people, +3.8% since 2020, 22 roofing contractors
• Mason County: 68,389 people, +3.6% since 2020, 12 roofing contractors
• Grant County: 102,678 people, +3.3% since 2020, 13 roofing contractors
• Clark County: 521,150 people, +3.1% since 2020, 77 roofing contractors

Source: US Census Bureau, County Population Estimates, Vintage 2023.

Which code applies in Washington?

Washington uses the 2021 edition of the International Residential Code (IRC) (Statewide 2021 IRC with amendments, effective 2024-03-15). Homeowners rarely ask about code editions, but inspectors do, and a line on your service pages saying your work meets the current 2021 code answers the question before it comes up.

What should a Washington roofer website show?

• Your license number in the footer of every page. Washington requires it in advertising for at least some trades.
• A service area list that names real counties and towns, for example King County, Snohomish County and Pierce County.
• Seasonal pages published before May, so they are found when demand starts.
• Real reviews from local jobs, with the town named, and photos of your own work.

Washington questions

Who licenses roofers in Washington?

Washington State Department of Labor & Industries (L&I). Roofing is a registered specialty with no separate roofing license. A specialty contractor can only work in that specialty and cannot hire subcontractors. Registration needs a $15,000 specialty bond or $30,000 general bond, plus liability insurance.

How many roofing contractors are there in Washington?

The US Census Bureau counted 973 businesses with employees in Washington in 2022 in the category Roofing contractors, and 77% of them have fewer than 10 staff.

Which county in Washington has the most roofing contractors?

King County, with 202 businesses with employees in 2022 (Census County Business Patterns).

Do I need my license number on my website in Washington?

Contractors must include their L&I registration number in advertising, bids, estimates, business cards and online ads. Using a false or expired registration number to buy a required ad is a gross misdemeanor (RCW 18.27.020).

Which edition of the International Residential Code (IRC) does Washington use?

The 2021 edition. Statewide 2021 IRC with amendments, effective 2024-03-15.

When is the busiest season for roofers in Washington?

Washington’s statewide average runs from about 31°F in December to about 65°F in July (NOAA, 1991 to 2020).

Sources

• US Census Bureau, County Business Patterns 2022 (state and county files)
• US Census Bureau, City, Town and County Population Estimates, Vintage 2023
• NOAA NCEI, nClimDiv statewide temperature and degree days, 1991 to 2020
• https://lni.wa.gov/licensing-permits/contractors/register-as-a-contractor/
• https://app.leg.wa.gov/rcw/default.aspx?cite=18.27.020