Seattle deck costs are among the highest in the country in 2026 due to elevated labor rates and high construction demand. Expect to pay $26 to $46 per square foot for pressure-treated wood and $46 to $84 per square foot for composite decking. A standard 12×16 deck in Seattle typically costs between $7,500 and $16,000.
Estimates are for planning purposes only and based on 2025 contractor data.
Always get at least 3 quotes before hiring. Prices vary by ZIP code, site conditions, and contractor availability.
Deck costs in Seattle are among the highest in the country in 2026 due to elevated labor rates and high construction demand. Expect to pay $26 to $46 per square foot for pressure-treated wood and $46 to $84 per square foot for composite decking. A standard 12×16 deck in Seattle typically costs between $7,500 and $16,000.
Frequently Asked Questions
How much does a deck cost in Seattle in 2026?
Seattle homeowners typically pay between $7,000 and $16,500 for a new deck in 2026. Capitol Hill, Queen Anne, and the Eastside suburbs run the highest. Seattle has some of the highest construction labor costs in the western United States.
Do I need a permit to build a deck in Seattle?
Yes, the City of Seattle requires building permits for most deck projects. Seattle has detailed permit requirements including structural calculations for larger decks. Permit costs range from $300 to $1,200 and the process can take 6 to 12 weeks.
What is the best decking material for Seattle rain?
Composite decking and western red cedar are both excellent choices for Seattle. Seattle averages 38 inches of rain per year. Composite requires no maintenance while cedar is locally sourced and naturally rot-resistant in wet climates.
When is the best time to build a deck in Seattle?
June through September is the best building window in Seattle. Western Washington gets heavy rainfall from October through May. The dry summer months offer the most reliable conditions for deck construction and concrete work.