How Much Does a Deck Cost in Seattle?

Several factors determine the final price of a deck in Seattle: 1. Size — Square footage is the primary cost driver. Most deck contractors price by the square foot. 2. Material — Cedar is the most affordable. Composite (Trex, TimberTech) costs 40–60% more upfront but requires virtually no maintenance for 25+ years. 3. Height off grade — A ground-level deck requires simple footings. A raised deck (6–10 feet off grade) needs engineered footings, more lumber and more labor. 4. Design complexity — Straight rectangular decks are cheapest. Multi-level decks, curves, built-in benches, pergolas and hot tub surrounds all add cost. 5. Railing — Standard pressure-treated railing is affordable. Cable railing, glass panels and custom steel add $150–$400 per linear foot. 6. Site access — Difficult access (steep slopes, narrow side yards) adds labor time and cost.

Seattle's wet, mild climate accelerates wood decay more than most US cities. Here's the honest comparison: Cedar deck (300 sq ft): - Installation: $10,000–$18,000 - Annual maintenance (staining/sealing): $300–$600/year - Lifespan: 15–25 years with maintenance - Total 20-year cost: $16,000–$30,000 Trex composite deck (300 sq ft): - Installation: $15,000–$25,000 - Annual maintenance: $0 (just cleaning) - Lifespan: 25–30+ years - Total 20-year cost: $15,000–$25,000 Over 20 years, composite is often the better financial choice in Seattle — and eliminates the hassle of annual maintenance. For homeowners who love working on their homes and prefer the natural look, cedar remains an excellent choice.

To get an accurate deck quote in Seattle, be prepared to share: • Your property address (contractors need to see the site) • Approximate desired size (or dimensions) • Preferred material (cedar vs. composite) • Any special features (pergola, hot tub surrounds, built-in seating, stairs) • Whether you need permits handled Be wary of phone or email quotes without a site visit — deck costs are highly site-specific. Sloped lots, difficult access and local permit requirements all affect the final price. Vikings Exterior provides free in-home estimates with a written, fixed-price quote within 3 business days.

Labor and permit costs are consistent across the Seattle metro. However, site conditions vary significantly by neighborhood: Capitol Hill / First Hill — Urban lots with limited access. Expect +10–20% for access premiums. West Seattle — Sloped lots common. Multi-level designs frequently needed. Bellevue / Eastside — Faster permit timelines, similar material and labor costs. Bothell / Kirkland — Slightly lower permit fees than Seattle proper. Sammamish / Issaquah — Larger lots, often lower site complexity. All Vikings Exterior quotes include permitting fees and any access surcharges — no surprise line items.