Multi-level gray composite deck with stepped design attached to a residential home in the San Francisco Bay Area

Composite Decks Built for Fog, Salt Air & Zero Maintenance

The Bay Area's marine layer, salt air, and constant moisture cycling destroy wood decks in a few years. Composite gives you the look of real wood with none of the rot, splinters, or annual staining.

Or call (650) 771-5817

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Outdoor Living That Actually Lasts on the Coast

You want a deck. A place to have coffee in the morning, grill on the weekend, or just sit outside and enjoy the view. The problem is, the Bay Area's coastal climate is brutal on wood. From Sausalito and Pacifica to SF and the Peninsula, the marine layer, salt air, constant moisture cycling, and temperature swings warp, crack, and rot traditional lumber faster than almost anywhere in California.

That's why we build with composite. Brands like Trex and TimberTech have engineered decking materials that look and feel like real wood but won't rot, splinter, warp, or fade. No annual staining. No pressure washing every spring. No replacing boards every few years. You build it once and enjoy it for 25+ years.

From Marin's hillside homes to SF's tight lot lines to Peninsula backyards in Burlingame, San Carlos, and Palo Alto — we've designed and built composite decks for every type of property the Bay Area throws at us. Whether you want a simple single-level patio deck or a multi-tier outdoor living space with built-in lighting and pergola, we build it to last.

Our Composite Deck Services

Every deck we build is custom-designed for your space, your lot, and your lifestyle.

Trex & TimberTech Composite Decks

Premium composite boards with 25-year manufacturer warranties — available in dozens of colors and grain patterns.

Multi-Level Decks

Tiered designs that work with the Bay Area's sloped backyards — creating usable outdoor space on terrain that would otherwise go to waste.

Pergolas & Shade Structures

Integrated pergolas, shade sails, and overhead structures for sunny days when you want cover from the heat.

Railing Systems

Cable rail, glass panel, and composite rail systems — code-compliant and designed to complement your deck aesthetic.

Deck Lighting

Integrated LED post caps, step lights, and under-rail lighting — extend your outdoor living into the evening.

Composite Deck Costs in the Bay Area

Standard Composite Deck (300 sq ft)

Including railings and permits

$15,000–$35,000

Multi-Level Deck

Tiered design for sloped yards

$35,000–$60,000+

Deck with Pergola

Composite deck + shade structure

$25,000–$50,000

Railing System Only

Cable, glass, or composite rails

$3,000–$8,000

Prices reflect typical San Francisco market rates. Your exact cost depends on scope, site conditions, materials, and permits. We provide detailed, itemized estimates — no ballpark guesses.

Get Your Exact Price — Free Estimate

Our Process

We walk the deck with you, ensure every detail is right, and hand over your warranty paperwork.

Why Choose Gadget Construction

Built for Bay Area Weather

We spec materials specifically for the Bay Area's fog, salt air, and moisture cycling — from the coast to inland valleys.

Zero Maintenance

No staining, sealing, or sanding — ever. Composite decks clean up with soap and water.

25-Year Manufacturer Warranty

Plus our 5-year workmanship warranty. Your deck is covered from every angle.

Dozens of Color Options

Match your home's exterior, complement your landscape, or go bold — the options are wide open.

Our Composite Deck Projects

Outdoor Living Deck with Pergola & Lighting

Bay Area

Evening Spa Deck with Custom Lighting

Bay Area

Wraparound Composite Deck with Garden View

Bay Area

Entertainer's Deck with Fire Pit & Pergola

Bay Area

See More of Our Work

Frequently Asked Questions

A standard 300-square-foot composite deck in the Bay Area typically costs $15,000–$35,000 including materials, labor, railings, and permits. Multi-level decks, pergolas, built-in lighting, and premium materials can push costs to $40,000–$60,000+. Costs vary slightly by city and site access. We provide detailed estimates with material selections so you can adjust scope and budget before committing.

Upfront cost: composite is 20–40% more expensive than pressure-treated wood. Lifetime cost: composite wins by a wide margin. Wood decks in the Bay Area's coastal climate need staining every 1–2 years ($500–$1,500 each time), plus board replacement as they rot and warp. Composite needs virtually zero maintenance and lasts 25–50 years. Most homeowners break even on cost within 5–7 years — and never have to spend another weekend staining their deck.

Premium composite decking (Trex Transcend, TimberTech Pro) comes with 25-year fade and stain warranties. The structural lifespan is 50+ years with proper installation. In the Bay Area's marine climate, a well-built composite deck will outlast 3–4 generations of wood decks.

In most Bay Area cities, decks attached to the house, decks over 30 inches above grade, and any deck with structural footings require a building permit. Permit processes vary by jurisdiction — SF's DBI, Marin's Community Development, and each Peninsula and South Bay city have their own procedures. We handle the full permit process for every city we serve.

Yes. We serve 31 cities across Marin, San Francisco, San Mateo, Alameda, Contra Costa, and Santa Clara counties. Coastal cities like Sausalito, Pacifica, and Daly City have the same fog and salt-air challenges as SF — composite is especially smart in those areas. We also build throughout the Peninsula and South Bay.

Ready for a Deck That Lasts?

Get a free design consultation. We'll visit your property, discuss materials and layout, and give you a fixed-price estimate — no surprises.

Or call (650) 771-5817 — talk to a real person, not a call center.