Home Addition Cost in Washington (2026)
Compare home addition costs across 1 city in Washington. Prices range from $67,100 in Seattle to $67,100 in Seattle.
State average
$67,100
Range
$67,100 – $67,100
Cities tracked
1
City comparison
| City | Avg cost | Budget range | High-end range | vs state avg |
|---|---|---|---|---|
| Seattle, WA | $67,100 | $22,000–$26,800 | $131,800–$168,400 | 0% |
Explore each city
Other projects in Washington
See kitchen remodel costs in Washington →See bathroom remodel costs in Washington →See roof replacement costs in Washington →See deck building costs in Washington →See window replacement costs in Washington →See flooring installation costs in Washington →See interior painting costs in Washington →See exterior painting costs in Washington →See hvac installation costs in Washington →See fence installation costs in Washington →See garage door replacement costs in Washington →See siding replacement costs in Washington →See basement finishing costs in Washington →See driveway paving costs in Washington →See landscaping costs in Washington →See plumbing repipe costs in Washington →See electrical panel upgrade costs in Washington →See insulation costs in Washington →See gutter installation costs in Washington →See patio installation costs in Washington →See concrete work costs in Washington →See cabinet refacing costs in Washington →See countertop replacement costs in Washington →See bathroom tile costs in Washington →See water heater installation costs in Washington →See septic system costs in Washington →See solar panel installation costs in Washington →See basement waterproofing costs in Washington →See attic conversion costs in Washington →
Frequently asked questions
The average home addition in Washington costs $67,100. Prices range from $67,100 in Seattle to $67,100 in Seattle. Costs vary by city due to differences in labor rates, material availability, and local code requirements.