Flat roof in Washington averages $10,260–$17,100 in 2026 — Washington is a higher-cost market, about 14% above the U.S. average. Costs vary by city, so use the calculator for a Washington-rate estimate or pick your city below.
*Washington average across all cities; individual cities vary with the local labor market.
★★★★★ Trusted by homeowners across Washington
Washington average pricing. Adjust for your roof.
Flat roof quotes vary widely between Washington contractors and cities. Our calculator uses local 2026 labor data so you walk in informed.
Estimates adjusted for local labor rates in each Washington city — not a national average.
Compare licensed, insured local roofers side by side. No pressure, no hidden fees.
From major metros to smaller Washington towns — find your city for a local estimate.
Typical flat roof cost in each Washington city, adjusted for local labor rates. Click a city for a full local estimate and breakdown.
| City | Typical flat roof cost |
|---|---|
| Seattle, WA | $10,710 – $17,850 |
| Spokane, WA | $9,810 – $16,350 |
| Tacoma, WA | $10,260 – $17,100 |
Average Washington prices across all cities.
| Material | Installed $/sq ft (local) |
|---|---|
| EPDM Rubber | $4.56 – $10.26 |
| TPO | $5.7 – $11.4 |
| PVC | $7.41 – $14.82 |
| Modified Bitumen | $4.56 – $10.26 |
| Built-Up (BUR) | $5.13 – $11.4 |
Estimated total Washington cost by roof area, at average Washington labor rates.
| Roof Size | Typical Example | Washington Total |
|---|---|---|
| 500 sq ft | Garage / small extension | $2,850 – $5,700 |
| 1,000 sq ft | Small home | $5,700 – $11,400 |
| 1,500 sq ft | Average home | $8,550 – $17,100 |
| 2,000 sq ft | Large home | $11,400 – $22,800 |
| 3,000 sq ft | Multi-family / commercial | $17,100 – $34,200 |
The factors that make Washington flat roof quotes differ from city to city.
| Cost factor | How it affects your Washington quote | Impact |
|---|---|---|
| Local labor rates | Washington is a higher-cost market — labor runs about 14% above the U.S. average, and it varies further between Washington cities. | High |
| Material choice | Premium materials cost more per square foot but usually last longer. | High |
| Roof size & access | Bigger roofs cost more overall but less per square foot; steep or multi-story roofs add labor. | Medium |
| Tear-off & disposal | Removing the old roof adds roughly $1–$2.50 per sq ft. | Medium |
| Washington permits | Most Washington cities require a roofing permit ($150–$500), which your roofer pulls for you. | Low |
| Washington climate | Local weather drives material choice — frequent rain makes watertight, heat-welded seams and proper drainage critical in Washington. | Medium |
Add your roof size and material — the calculator uses Washington average labor rates.
Get an instant Washington price range, or pick your city for exact local pricing.
Request free, no-obligation quotes from licensed Washington roofers.
Tell us about your Washington roof and we match you with up to 3 licensed local roofers. Compare prices — the choice is yours.
Across Washington, flat roof averages $10,260–$17,100 in 2026 (about 14% above the U.S. average), but it varies by city — Seattle and other metros differ from smaller towns. Use the city table above for a local figure.
Smaller Washington cities and lower-cost metros sit at the bottom of the city table above; major metros run higher due to labor costs.
We cover 3 Washington cities including Seattle, Spokane, Tacoma.
Pick your Washington city, set your roof details, and request free quotes from licensed local roofers.
We connect homeowners across Washington with licensed, insured local roofers — in every city listed above.