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Decks and Porches Cost in Seattle, WA in 2026

Most Decks and Porches projects in Seattle, WA cost between $8,500 and $29,000. The typical price is $15,500.

Labour and materials in Seattle run about 20% above the national average. These figures are adjusted for that, so they are not the national average you will find elsewhere.

What drives the price

  • Pressure-treated pine versus composite versus hardwood
  • Height off the ground and stair count
  • Railing material
  • Footing depth required by frost line

Usually included

  • Footings, framing and decking
  • Railings and stairs
  • Fasteners and flashing at the ledger

Usually extra

  • Permits
  • Under-deck drainage
  • Built-in seating or pergola

Unit prices in Seattle, WA

Quality tierCost per sq ft
Budget$28
Mid-range$51
High-end$96

Deck builders in Seattle, WA

Businesses listed on Google near Seattle, WA. We are not affiliated with them and do not vet them — always confirm licensing and insurance before hiring.

Decks and Porches by project type

Build or ReplaceRepair

Decks and Porches costs nearby

Medina, WAMercer Island, WABellevue, WAKirkland, WABainbridge Island, WARenton, WAKenmore, WAVashon, WARedmond, WASammamish, WA