Seattle's #1 Deck Builder Repair · Restoration · Refinishing · Installation

Most Seattle deck projects land between $7,500 and $35,000. A 300 sq ft (28 sq m) Western Red Cedar deck runs $12,000–$18,000 installed. The same footprint in Trex Transcend or TimberTech AZEK composite costs $18,000–$28,000. IPE hardwood pushes to $28,000–$65,000 depending on complexity. 5 things drive the price: square footage, material grade, elevation above grade, hardware choices (Simpson Strong-Tie connectors, hidden fastening systems), and SDCI permit fees. Call (888) 401-2283 for a real ballpark in 5 minutes.

Yes. Any deck over 30 inches above grade requires a Seattle Department of Construction & Inspections (SDCI) permit. You'll need structural drawings, ledger attachment details, and footing specs. King County Building Permits apply in Bellevue and Kirkland. Permit review typically adds 2–4 weeks (yes, Seattle SDCI is slow). We handle all the paperwork in-house so you don't have to deal with it.

Honestly, check 4 things before hiring anyone: NADRA membership, BBB A+ accreditation, TrexPro or TimberTech Pro certification, and an active WA Contractor License. Any reputable crew should hand you those documents without hesitation. We hold all 4. Our 17 years of Pacific Northwest (PNW) experience, 1,250+ completed projects, and 4.9/5 rating across 312+ Google reviews give you a track record you can verify.

Depends on your budget and how much maintenance you want. Western Red Cedar costs less (a 300 sq ft deck runs $12,000–$18,000 installed) but you'll re-stain it every 2–3 years or the wood opens up and rots. Trex Transcend and TimberTech AZEK don't need staining and carry 25–30 year warranties, but they get hot underfoot on south-facing decks in July. IPE hardwood lasts 50+ years and resists rot and insects naturally, though most projects run $28,000–$65,000. PVC decking (AZEK, Fiberon) is the right call for rooftop and waterfront builds. Seattle gets 37 inches (94 cm) of rain annually, so whatever material you choose, board spacing and drainage matter as much as the material itself.

Ask 6 things before signing: (1) WA Contractor License number? (2) Bond and insurance amounts? (3) NADRA, TrexPro, or TimberTech Pro certifications? (4) Does the quote include SDCI permits, structural engineering, and joist tape? (5) What does the warranty cover and for how long? (6) Will any subcontractors be on site? Answers should be specific, written, and verifiable. If a contractor gets defensive about any of these, that's the answer.

Yes, if the original ledger and footings meet current code. We inspect 3 things first: ledger attachment strength, footing depth and condition, and joist span ratings. If the existing structure passes, the extension ties in with Simpson Strong-Tie connectors and matching joist tape. A permit is required for any addition over 30 inches above grade.

Board and railing repairs: 1–3 days. Resurfacing existing framing: 3–5 days. New 300 sq ft (28 sq m) builds: 6–10 days. Multi-level hillside builds and rooftop decks on Capitol Hill or Queen Anne: 12–21 days. SDCI permit review adds 2–4 weeks before construction can start, so factor that into your timeline.

Wildland-Urban Interface (WUI) rules apply to homes in designated fire-risk zones around Seattle's wooded edges. You'll need 3 things: fire-resistant decking material (composite, ignition-resistant cedar, or Class A rated hardwood), board gaps no wider than 1/8-inch to block ember entry, and metal flashing at the wall-to-deck junction. Trex, TimberTech AZEK, and IPE all meet WUI standards. We handle the compliance documentation for SDCI review.