Roof Replacement Cost in Sammamish, WA (2026)
Updated October 2026 · Sammamish, WA · index 1.25
How much does a new roof cost in Sammamish? For a 2,000 sq ft roof with architectural asphalt shingles, homeowners in Sammamish, WA pay about $16,500 on average, and most quotes land between $12,900 and $20,100 — $6.43 to $10.03 per sq ft. The price covers tearing off one layer to the deck, ice and water shield, synthetic underlayment, drip edge, the roofing itself, ridge vent, flashing, the permit, the dumpster and cleanup.
The roof replacement price in Sammamish runs 25% above the U.S. average: construction labor in the Sammamish area runs 40% above the national mean, materials 3% above. The same job averages $13,200 nationally and about $15,300 at the Washington statewide index.
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Roof replacement price in Sammamish by roofing material
What a 2,000 sq ft roof costs in Sammamish with each roofing material, installed:
| Option | Average · range |
|---|---|
| Architectural asphalt shingles30-year laminated shingle, the most common re-roof$8.23 per sq ft | $16,500$12,900 – $20,100 |
| 3-tab asphalt shinglesflat single-layer shingle, the budget option$7.44 per sq ft | $14,900$11,500 – $18,200 |
| Impact-resistant (Class 4) shingleshail-rated shingle; some insurers discount it$9.19 per sq ft | $18,400$14,500 – $22,300 |
| Standing-seam metalconcealed-fastener steel panels$19.00 per sq ft | $38,000$31,000 – $45,000 |
The least expensive option in Sammamish is 3-tab asphalt shingles, at about $14,900; standing-seam metal averages $38,000, 2.6 times as much.
Cost to replace a roof in Sammamish by size
With architectural asphalt shingles, priced for Sammamish, WA:
| Size | Average · range |
|---|---|
| A 1,500 sq ft roof$8.59 per sq ft | $12,900$9,950 – $15,800 |
| A 2,000 sq ft roof$8.23 per sq ft | $16,500$12,900 – $20,100 |
| A 3,000 sq ft roof$7.87 per sq ft | $23,600$18,700 – $28,600 |
Some costs stay the same whatever the size — roof measurement and inspection, permit and final inspection, site protection — so a bigger job costs less per unit: $7.87 per sq ft for a 3,000 sq ft roof against $8.59 for a 1,500 sq ft roof.
What a roof replacement in Sammamish includes
Line by line, the $16,500 average for a 2,000 sq ft roof breaks down like this: 54% labor, 45% materials and equipment, and $300 in permit fees passed through at cost.
| Line | Low – high |
|---|---|
| Roof measurement and inspection | $90 – $310 |
| Permit and final inspection | $150 – $450 |
| Site protection | $190 – $440 |
| Tear-off to the bare deck (one layer) | $1,650 – $2,500 |
| Dumpster and landfill fees | $400 – $750 |
| Ice and water shield at eaves and valleys | $570 – $900 |
| Synthetic underlayment | $530 – $860 |
| Drip edge | $380 – $650 |
| Starter strip | $210 – $380 |
| Roofing material, delivered | $3,500 – $4,600 |
| Installation labor | $3,750 – $5,250 |
| Valleys | $80 – $140 |
| Ridge and hip cap | $340 – $560 |
| Pipe boots and vent flashing | $280 – $630 |
| Step and wall flashing | $150 – $300 |
| Ridge vent | $240 – $400 |
| Cleanup and magnetic nail sweep | $310 – $560 |
| Warranty registration | $60 – $380 |
Each line is the price book's U.S. rate for that step times Sammamish's index of 1.25; permit fees are not scaled.
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What affects roof replacement prices in Sammamish
Labor and materials in Sammamish
Construction wages in the Sammamish metro run 34% above the U.S. mean (BLS, May 2025), and specialty-contractor pay in the city's county moves that up by 5%, to 40% above the national mean. Materials in the area's ZIP codes price 3% above the national average. Together they give Sammamish a construction cost index of 1.25.
Where Sammamish sits in Washington
Sammamish ties for the most expensive of the 32 Washington cities in our index, against a statewide index of 1.16. Yakima is the least expensive at 1.04.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Sammamish ranks 8th from the most expensive. The job that averages $16,500 here averages $13,200 at the national rate.
Sales tax in Washington
Washington's base state sales tax is 6.5%, and cities and counties can add their own. How it applies to a home-improvement contract varies, so ask whether a quote includes it. Prices on this page are before tax.
What a Sammamish contractor will ask before quoting
- How many layers come off, and is the decking sound?
- Roof pitch and stories — steep or two-story work adds 15-30% labor
- Ventilation and flashing details (ridge vent, chimney, skylights)
Roof replacement cost in other Washington cities
A 2,000 sq ft roof with architectural asphalt shingles averages $16,500 in Sammamish; $16,500 in Issaquah, $16,500 in Mercer Island, $16,500 in Federal Way.
| City | Average · range |
|---|---|
| Issaquah, WAsame as Sammamish | $16,500$12,900 – $20,100 |
| Mercer Island, WAsame as Sammamish | $16,500$12,900 – $20,100 |
| Federal Way, WAsame as Sammamish | $16,500$12,900 – $20,100 |
| Shoreline, WAsame as Sammamish | $16,500$12,900 – $20,100 |
| Auburn, WAsame as Sammamish | $16,500$12,900 – $20,100 |
| Lynnwood, WA3% less | $15,900$12,400 – $19,400 |
| Kent, WAsame as Sammamish | $16,500$12,900 – $20,100 |
| Edmonds, WA3% less | $15,900$12,400 – $19,400 |
roof replacement price in Sammamish: questions
How much does a new roof cost in Sammamish, WA?
About $16,500 for a 2,000 sq ft roof with architectural asphalt shingles, and most Sammamish quotes fall between $12,900 and $20,100. That is 25% above the U.S. average, where the same job averages $13,200.
What is the roof price per square foot in Sammamish?
$6.43 to $10.03 per sq ft, about $8.23 on average, or $823 per square (100 sq ft), with architectural asphalt shingles. Smaller jobs cost more per unit, because the fixed costs are spread over less.
How much is a 3,000 sq ft roof in Sammamish?
$18,700 to $28,600, about $23,600 on average, with architectural asphalt shingles — $7.87 per sq ft.
Do you need a permit for roof replacement in Sammamish?
It depends on the city: for a roof replacement some building departments want a permit and some don't, so check with Sammamish's. The prices on this page carry $150–$450 for the permit and inspection.
Does the price include sales tax in Washington?
No. The prices here are before tax; Washington's base state rate is 6.5%, plus any local rate.
What is the cheapest roofing material for roof replacement in Sammamish?
3-tab asphalt shingles, at about $14,900 for a 2,000 sq ft roof. Standing-seam metal runs about $38,000.
Other home projects in Sammamish
Roof replacement cost in Washington
How these prices are built
Every price on this page comes from JobFlex's contractor price book: what a homeowner pays a licensed contractor for each step of the job, as a U.S. national average per unit, with the contractor's overhead and profit included and sales tax left out. The roof replacement is priced step by step, then multiplied by Sammamish's construction cost index of 1.25.
The index weighs local construction wages (BLS Occupational Employment and Wage Statistics, May 2025) at 60% and the area's material prices (Craftsman ZIP-area factors) at 40%. Published indices for Sammamish, each on its own base: Craftsman 1.13. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Sammamish build quotes like these with JobFlex's roof estimator.
- HomeGuide 2026: architectural shingles $400-$600 per square installed, $7,500-$16,000 average roof
- Roof tear-off guides 2026 (SquareDash, RoofingCalculatorHQ): tear-off $1.00-$2.40/sqft incl. dumpster; permit $100-$500