Solar Installation Cost in Seattle, WA
Solar Installation in Seattle, WA costs a median of $18,000, with the middle 50% of projects between $6,300 and $27,180. Based on 6,113 permits filed between February 2018 and July 2026 with Seattle Department of Construction and Inspections. Last updated July 30, 2026.
Sourced from 6,113 building permits on file with the City of Seattle. Source: Seattle Building Permits.
What Most Homeowners Paid
You could save $5,400 on a typical solar PV system in this market by claiming the federal Investment Tax Credit on your tax return.
- Federal Solar Investment Tax Credit (ITC)30%
- Federal credit applies to systems placed in service through .
Net cost is the median permit value minus the credits above, with each percent credit capped at its statutory maximum. Credits are nonrefundable and require sufficient tax liability to claim. Utility-level rebates are not included. Sources: IRS Form 5695.
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Public record data. HomeQuotr does not alter, estimate, or interpolate permit values.
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Half of all projects cost less. Half cost more.