Planning a renovation in Seattle, WA? Costs here run about 128% of the national average, driven by local labor and material prices. Below are 2026 estimates for the most common Seattle home improvement projects, along with what you'll need to know about permits and inspections.
| Project | Budget | Typical | High-End | Avg ROI |
|---|---|---|---|---|
| Kitchen Remodel | $23,300 | $33,300 | $46,600 | 70% |
| Bathroom Renovation | $10,800 | $15,400 | $21,500 | 65% |
| Deck / Patio | $16,100 | $23,000 | $32,300 | 68% |
| Roof Replacement | $9,900 | $14,100 | $19,700 | 62% |
| Room Addition | $44,800 | $64,000 | $89,600 | 55% |
| HVAC Replacement | $8,100 | $11,500 | $16,100 | 60% |
| Flooring | $7,200 | $10,200 | $14,300 | 72% |
| Window / Door Replace | $10,800 | $15,400 | $21,500 | 69% |
| Interior Painting | $4,500 | $6,400 | $9,000 | 107% |
Estimates are local averages for planning only and vary by scope, materials, and contractor. Always get multiple bids.
Get Your Exact Seattle Estimate — Free →Most kitchen, bathroom, electrical, plumbing, and structural work in Seattle, WA requires a permit from your local building department, plus one or more inspections before the job can close. Requirements vary by project and jurisdiction — and missing one can mean fines or a stop-work order.
BuildWise automatically looks up the permit requirements and the inspection-scheduling portal for Seattle so you know exactly what to file and when.