Cost to build a deck in Seattle, WA (2026)
Planning to build a deck in Seattle, WA? Expect to spend roughly $11,500 for a typical job, with the range running from about $5,200 on the low end to $23,500 for larger or higher-end work.
What drives the cost
- Deck size and height
- Material (pressure-treated, composite, hardwood)
- Railings, stairs and footings
- Permits and site prep
What's typically included
- Footings and framing
- Decking boards and railings
- Stairs and fasteners
- Labor and permits
How to get the best price in Seattle
Get 2–3 itemized quotes from licensed, insured local pros and compare the same scope and materials. Ask about off-season timing and bundling related work. The lowest bid isn't always the best value — check reviews, licensing and warranty.
Frequently asked questions
How much does it cost to build a deck in Seattle, WA?
In Seattle, WA, it typically costs $5,200 to $23,500, with an average of about $11,500. Your exact price depends on deck size and height and material (pressure-treated, composite, hardwood).
What affects the price the most?
The biggest cost drivers are: Deck size and height; Material (pressure-treated, composite, hardwood); Railings, stairs and footings; Permits and site prep. Getting 2–3 itemized quotes is the best way to see how these apply to your specific project.
What's usually included?
A standard quote to build a deck generally includes: Footings and framing; Decking boards and railings; Stairs and fasteners; Labor and permits. Always confirm what's in (and out of) scope before signing.
How can I save money?
Get multiple quotes, ask about off-season scheduling, bundle related work, and make sure you're comparing the same scope and materials. The cheapest bid isn't always the best value — check licensing, insurance and reviews.
Are these prices exact?
No — they're estimated local ranges for planning, derived from national averages adjusted for Seattle, WA costs. For an exact number, get a free in-person quote from a local pro.