Why is Seattle home addition labor priced the way it is?

Local general contractor wages, trade availability, permitting, and climate all move the labor bill in Seattle. Metros with tighter labor markets and stricter codes sit at the upper end of the range.

How do I compare general contractor labor quotes in Seattle?

Ask each general contractor to break out labor per sq ft or per job separately from materials, confirm crew size and schedule, and get at least three written quotes before you commit.

Home Addition Labor Cost in Seattle, WA (2026)

Home Addition labor in Seattle runs $100-$250 per sq ft, about 25% above the national average. This is the general contractor labor charge only, separate from materials.

Estimate labor only

Size (sq ft)ComplexityCity

Estimated home addition labor

$35,000

Range $20,000 - $50,000

Labor rate: $175 / sq ft

Local index: 1.25x

Labor only. Materials are billed separately.

City labor avg

$175 / sq ft

vs national

+25%

Local general contractor hourly

$41/hr

Room addition framing in progress with open walls and roof sheathing

A detailed Seattle labor guide for this trade is being prepared. In the meantime, use the calculator above for a local labor-only estimate.

See full home addition cost in Seattle (labor + materials)

Nearby labor costs: Portland, OR · Portland, OR

All home addition labor costs by city →

Frequently asked questions

Labor for a home addition in Seattle, WA runs $100-$250 per sq ft, about 25% above the national average. That covers the general contractor crew's time, not materials.