Roofers in Seattle, Washington

That typical price is about 1.3% of the median Seattle home value ($912,100).

For comparison, Seattle's open building-permit data (permit type Roof, single-family and duplex) shows a 2025 median declared project cost of $16,820 across 254 permits. That is the value applicants declared on the permit, not an invoice, and it is not on the same basis as our estimate.

Full Seattle cost guide by material →

Not sure the whole roof has to go? Repair or replace calculator.

Seattle's roof problem is water and wind rather than hail: the county-coded NOAA Storm Events records for King County hold no hail, thunderstorm-wind or tornado reports from 2014 to June 2026, but NOAA's Seattle and Vicinity forecast zone logged 21 high-wind or strong-wind events in that period, the strongest measured gust 53 knots (about 61 mph). Sea-Tac Airport logs measurable precipitation on about 156 days a year (NOAA 1991-2020 normals), so shingle roofs stay damp for much of the year; Oregon State University Extension notes that moss does not grow easily on metal roofs. NASA POWER grid data for 2014-2023 averages 1 day a year at 90 F or higher, and the airport reached 108 F on June 28, 2021.

Seattle had 737,015 residents in the 2020 Census. In the Census Bureau's 2019-2023 survey the city's median year built is 1974, 54.2% of its housing units were built before 1980, 44.2% of occupied units are owner-occupied, and the median owner-occupied home is worth $912,100. Under Seattle's Department of Construction and Inspections (SDCI) rules, re-roof work on a one- or two-family home or townhouse needs no permit if nothing changes in the building envelope other than adding or replacing insulation, and needs a construction permit if the work alters the envelope in any other way. Commercial and multifamily re-roofs need a re-roof permit, closed with an Affidavit-Roof Replacement and no on-site inspection. Where single-family and duplex roof permits were pulled, the 2025 median declared project cost was $16,820 across 254 permits (declared on the application, not the invoice). Washington has no separate roofing license; every construction contractor registers with the state's Labor and Industries (L&I) department with a surety bond ($30,000 for general contractors, $15,000 for specialty contractors) and liability insurance ($200,000 public liability and $50,000 property damage, or $250,000 combined single limit). Because a one- or two-family re-roof may need no permit, no permit inspection backs the work, so look the business up on L&I's contractor lookup (secure.lni.wa.gov/verify) before you sign.