Deck Installation Cost in Seattle, WA
Based on 2,397 deck installation building permits filed in Seattle between 2015 and 2026, the typical declared project value is $15,000, with most landing between $7,500 and $30,000. These are real records from Seattle's public building-permit data, declared job values, not contractor estimates or AI guesses.
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Deck Installation values over time in Seattle
Median declared value moved from $15,000 in 2021 to $16,304 in 2026, up 9% over that span. Each year below is computed from the filings that actually cleared in Seattle.
Recent deck installation permits in Seattle
Actual filings from Seattle's public permit records. Declared job values, not final paid prices.
| Filed | Declared value | Work described |
|---|---|---|
| 2026-06-15 | $2,000 | Repair and construct existing deck per STFI |
| 2026-06-12 | $11,224 | Replace and expand upper floor deck at SW side of existing one-family dwelling per plan. |
| 2026-06-10 | $18,000 | Construct deck on rear of one family dwelling subject to field inspection STFI. |
| 2026-06-10 | $9,307 | Construct deck addition to upper floor of single family residence per plans. |
| 2026-06-08 | $9,000 | Construct deck on rear of one family dwelling subject to field inspection STFI. |
| 2026-06-08 | $45,000 | Construct deck to rear of one family dwelling subject to field inspection STFI. |
| 2026-06-08 | $17,018 | Construct deck addition to existing one family dwelling per plan. |
| 2026-06-07 | $5,396 | Construct deck additions for existing one-family dwelling subject to field inspection (ST |
| 2026-06-05 | $16,300 | Construct deck replacement for exiting deck per STFI |
| 2026-06-04 | $39,254 | Replace existing deck for one family dwelling subject to field inspection STFI. |
| 2026-06-03 | $50,000 | Alterations and repair of existing deck at dwelling unit subject to field inspection (STFI |
| 2026-06-03 | $19,863 | Alterations and updates to rear deck to a one-dwelling residence subject to field inspec |
| 2026-05-28 | $25,000 | Construct alterations and deck addition to a one-family residence per plans |
| 2026-05-26 | $25,000 | Exterior alteration to deck at existing dwelling unit Subject To Field Inspection. (STFI |
| 2026-05-22 | $10,000 | Deck addition to a one-dwelling unit subject to field inspection. |
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Add your price →How to read these numbers
A permit's declared value is the job cost the owner or contractor stated when they pulled the permit. It tracks the real cost of the work but can run a bit under what was actually paid, since it often leaves out some labor and finish costs. Treat the range as a grounded starting point. What deck installation actually costs in Seattle comes down to home size, materials, and scope.
Where this comes from
Every figure is pulled from Seattle's public building-permit records and classified by the work described. Nothing is estimated or AI-generated. How the data works. The moment a Seattle homeowner adds a real receipt, this page upgrades to show what neighbors actually paid next to these permit values.
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