Roof replacement cost in Washington
A typical asphalt shingle replacement on a 1,500 to 2,500 sq ft home in Washington runs about:
$11,400 to $17,800
That is about 6% above the national baseline of $10,800 to $16,800 for the same home (state index 1.06).
Washington roof replacement cost by material and home size
The statewide figure blends rural and metro prices. For ZIP codes starting 980 to 984 (the Puget Sound area), our price check uses a higher index of 1.35, based on Seattle and Tacoma area cost guides.
| Home size | Asphalt shingle | Metal | Flat roof (TPO or EPDM) |
|---|---|---|---|
| Under 1,500 sq ft | $8,100 to $12,600 | $17,100 to $27,900 | $9,900 to $19,800 |
| 1,500 to 2,500 sq ft | $11,400 to $17,800 | $24,200 to $39,400 | $14,000 to $28,000 |
| 2,500 to 3,500 sq ft | $15,700 to $24,500 | $33,200 to $54,200 | $19,200 to $38,500 |
| Over 3,500 sq ft | $21,000 to $32,600 | $44,300 to $72,300 | $25,700 to $51,300 |
Per roofing square installed in Washington: asphalt shingle $477 to $742; metal $1,007 to $1,643; flat roof (TPO or EPDM) $583 to $1,166.
How these Washington figures are worked out
We start from the national typical price per roofing square for each material, multiply it by the squares on a typical roof for each home size, then apply the Washington index of 1.06 from our state-by-state source data. The ranges assume: full replacement with a single-layer tear-off, sound decking, average pitch (4/12 to 7/12), standard permits, and architectural shingle as the default.
A steep roof, extra layers to tear off, or rotten decking push the price up. Your exact price comes from the roofer who inspects your roof. Sources and method
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