Composite Decks in San Francisco — Built for the Fog
San Francisco's marine layer destroys wood decks in a few years. Composite gives you the look of real wood with none of the rot, splinters, or annual staining.
Years in Business
Projects Completed
Star Rated
Outdoor Living That Actually Lasts in San Francisco
You want a deck. A place to have coffee in the morning, grill on the weekend, or just sit outside and watch the fog roll in. The problem is, San Francisco's climate is brutal on wood. 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.
Gadget Construction has been building composite decks across San Francisco for over a decade. We know how to work with the city's tight lot lines, steep backyards, and permitting requirements. 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 San Francisco'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 fog-free days when you want cover from the sun.
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 San Francisco
Standard Composite Deck (300 sq ft)
Including railings and permits
Multi-Level Deck
Tiered design for sloped yards
Deck with Pergola
Composite deck + shade structure
Railing System Only
Cable, glass, or composite rails
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.
Our Deck Building Process
Design Consultation
We visit your property, measure the space, discuss your vision, and present material and color options.
Custom Design & Estimate
A detailed plan with dimensions, materials, and a fixed-price quote — so you know exactly what you're getting.
Permits
We pull the building permit through SF DBI and handle all required documentation.
Build
Foundation, framing, decking, railings, and finishing — typically completed in 1–3 weeks.
Final Walkthrough
We walk the deck with you, ensure every detail is right, and hand over your warranty paperwork.
Design Consultation
We visit your property, measure the space, discuss your vision, and present material and color options.
Custom Design & Estimate
A detailed plan with dimensions, materials, and a fixed-price quote — so you know exactly what you're getting.
Permits
We pull the building permit through SF DBI and handle all required documentation.
Build
Foundation, framing, decking, railings, and finishing — typically completed in 1–3 weeks.
Final Walkthrough
We walk the deck with you, ensure every detail is right, and hand over your warranty paperwork.
Why Choose Gadget Construction
Built for SF's Climate
We spec materials specifically for San Francisco's fog, salt air, and moisture cycling.
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.
What Our Deck Clients Say
“Gadget Construction transformed our 1940s Sunset District home into exactly what we envisioned. They handled everything — permits, inspections, the works. The crew showed up on time every single day and left the site spotless. We couldn't be happier with the result.”
Michael R.
Complete Remodel — Sunset District, SF
“After the last earthquake, we knew our foundation needed work. Gadget Construction came out the next day, explained everything in plain English, and gave us a detailed estimate. The work was done on schedule and on budget. We sleep better at night now.”
Sarah & David L.
Concrete Foundation — Bernal Heights, SF
“We wanted a deck that could handle San Francisco weather without constant maintenance. Gadget Construction recommended composite and walked us through every option. Six months in and it still looks brand new. Best investment we've made in this house.”
Jennifer K.
Composite Deck — Noe Valley, SF
Frequently Asked Questions
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 (628) 233-3589 — talk to a real person, not a call center.Step 1 of 3 — Select your service — Takes under 30 seconds
What type of project are you planning?