Deck Builder in Seattle, WA
Why Homeowners Choose SiA Builds
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Permits Handled
We pull all required city permits.
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No Subcontractors
Your deck is built by our own crew.
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10-Year Warranty
We stand behind every board and railing.
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Licensed & Insured
Fully licensed in Washington State.
Seattle
Seattle has some of the most challenging conditions for outdoor wood structures in the country. Constant rain, heavy shade, steep lots, and decades of deferred maintenance have left thousands of Seattle decks in need of repair, resurfacing, or full replacement.
SiA Builds serves Seattle homeowners across Ballard, Capitol Hill, Magnolia, West Seattle, Beacon Hill, and beyond. We handle everything — new custom deck construction, structural deck repair, and professional deck staining and refinishing. All work is permitted through the City of Seattle and backed by a 10-year warranty.
Deck Services We Provide in Seattle, WA
- Custom Deck Building & Installation in Seattle
- Composite and Wood Deck Construction
- Deck Repair & Structural Restoration
- Rotted Board Replacement and Resurfacing
- Deck Staining, Sanding & Refinishing
- Steep Lot and Multi-Level Deck Designs
- Full Permit Package — City of Seattle (DCI)
Why Seattle Homeowners Choose SiA Builds
Seattle’s construction market is saturated with options — and stories of contractors who disappear, subcontract without warning, or leave permit issues unresolved.
SiA Builds keeps it simple: our own crew, clear communication, and a written contract before any work starts. We know Seattle’s permit process through the Department of Construction and Inspections (DCI) and handle every step on your behalf. From steep hillside builds in Magnolia to deck repairs in Beacon Hill, we’ve worked across the city’s diverse neighborhoods and lot types.
Do I Need a Permit for a Deck in Seattle, WA?
Yes — the City of Seattle requires permits for most deck construction and structural repairs through the Department of Construction and Inspections (DCI). This includes new builds, elevated decks, attached structures, and any significant structural modifications.
Seattle’s permit process can be slow. We manage it for you: application, plan review, and inspection coordination. We’ve done this dozens of times and know how to keep the project moving.
How Much Does a Deck Cost in Seattle, WA?
Seattle deck costs vary by neighborhood, lot complexity, and materials:
| Pressure-treated wood deck | $9,000–$15,000 |
| Composite deck installation | $16,000–$32,000+ |
| Steep lot or multi-level design | add $4,000–$10,000 |
| Deck repair (minor to major) | $300–$8,000 |
| Deck staining and refinishing | $500–$3,000 |
Free on-site estimate. Written quote within 24 hours.
Get a Free Deck Estimate in Seattle, WA
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My Seattle deck is on a steep slope. Can you work with that?
Yes — steep and irregular lots are very common in Seattle. We design elevated and multi-level decks specifically for sloped properties. We assess your site before quoting so there are no surprises. -
How long does the Seattle permit process take?
It varies by project complexity. Simple projects may be approved in 2–4 weeks. More complex builds can take 6–8 weeks through DCI. We start the permit application as early as possible to minimize delays. -
Is my old deck safe? How do I know?
If your deck is 10+ years old and hasn’t been inspected recently, it’s worth a professional assessment. Soft spots, wobbly railings, and surface cracking are warning signs. We offer free on-site inspections. -
Do you serve all Seattle neighborhoods?
Yes — we work across Seattle including Ballard, Capitol Hill, Magnolia, West Seattle, Beacon Hill, Queen Anne, Fremont, Greenwood, and more.
Get a Free Deck Estimate in Seattle, WA ✨
Our works
SiA Builds
Schedule a consultation(425) 560 62 99
Dreaming of a beautiful and functional outdoor space that will be your pride? We're ready to help you make it happen! Contact us or fill out our contact form to schedule a consultation. During the meeting, we will assess your site, discuss your desires, and suggest the best solutions. We look forward to working with you and creating the perfect space for your home.
