Washington Development Impact Fees by City (2026)
Development impact, water/sewer connection, and mitigation fees across 7 Washington jurisdictions — normalized per dwelling unit so you can compare them directly.
7
Jurisdictions
$13,063
Median per home
impact + connection
$42,061
Highest
Redmond
$9,500
Lowest tracked
Seattle
Washington jurisdictions ranked by fee burden
Total fees per single-family detached home, highest first.
How development impact fees work in Washington
Washington impact fees are authorized under the Growth Management Act (RCW 82.02). Notably, Washington school districts commonly levy large school impact fees that the city or county collects — these can be the biggest single component.
Separate from impact fees, water and sewer utilities charge 'general facility charges' (GFCs) for connection, and SEPA environmental mitigation may apply to larger projects.
Washington impact fees — FAQ
- Which Washington city has the highest development impact fees?
- Redmond currently has the highest total at about $42,061 per single-family home among the Washington jurisdictions in ImpactFeeAtlas.
- What's the typical impact fee for a home in Washington?
- The median total across tracked Washington jurisdictions is about $13,063 per single-family home (impact + water/sewer connection fees).