Same size deck can cost anywhere from $8K to $20K+ in the Bay. The biggest variable? Material choices. A deck has 3 parts — frame, surface boards, railing — each with different needs. Using the same material for all three is the most common (and expensive) mistake.
1️⃣ Don’t waste money on redwood for the frame. The frame is hidden underneath. Pressure-treated pine ($15–18/board) handles moisture better than today’s second-growth redwood ($45+/board) and saves you $700+ for a 200 sq ft deck. Spend that money where it actually shows.
2️⃣ If you pick redwood, watch the grade. Construction Common (~$20/board) rots in 3–5 years. Construction Heart (~$35) lasts 10–15. Clear All Heart (~$55) lasts 20+. Most contracts just say "redwood" — always get the grade in writing. Or skip the maintenance entirely with capped composite (Trex, TimberTech, ~$50/board). 20–30% more upfront, zero upkeep.
3️⃣ Railings = biggest visual upgrade per dollar. Wood railings go gray fast. Metal posts with wood top rails are mid-range and durable. Cable railings are nearly invisible and zero-maintenance. Counterintuitive truth: railings are a small % of your budget but the biggest factor in how "expensive" your deck looks. Tight budget? Upgrade the railing first.
4️⃣ Screws depend on deck height. Hidden fasteners look clean but only work for low decks. Elevated decks need structural face screws — wind and stress demand stronger grip. Pick dark boards (charcoal, deep brown) and screw heads basically disappear.
5️⃣ Board direction changes everything. Parallel to the house = shrinks the space. Perpendicular = pulls the eye outward, feels deeper. Diagonal 45° = most upscale, costs 10–15% more. Crews default to parallel. Want something different? Put it in the contract.
Building a great deck isn’t about spending more — it’s about spending smart 💪
A standard pressure-treated wood deck in the Bay Area runs $8,000–$15,000 for 200–300 square feet. Composite decking (Trex, TimberTech) adds 20–30% to material costs but eliminates ongoing staining and sealing. Premium finishes — cable railings, composite boards, elevated framing on hillside lots — can push a 300 sqft deck to $20,000–$35,000. The biggest variable is the railing system, which often accounts for 25–40% of the total project cost.
Yes, in nearly all Bay Area cities. Decks attached to the house or elevated more than 30 inches above grade require a building permit. The permit process typically takes 2–6 weeks depending on the city — San Jose and most South Bay cities are relatively fast, while San Francisco can take considerably longer. We handle permits for all deck projects, including the required structural drawings for elevated or hillside decks.
Capped composite (Trex Transcend, TimberTech Azek) is the best performer for Bay Area conditions. The coastal marine layer, morning dew, and occasional rain cycles cause natural wood to gray and crack faster than in drier climates. Composite doesn’t rot, warp, or splinter, and it handles the UV exposure from afternoon sun without fading as quickly as uncapped composite. For the frame, pressure-treated pine is always the right call — even premium redwood isn’t worth the cost for structural members that stay hidden underground.
A well-built composite deck in the Bay Area lasts 25–30 years with minimal maintenance. Pressure-treated wood framing, properly installed, lasts 20–30 years. Natural redwood decking — if using Clear All Heart grade, properly sealed, and maintained — lasts 15–25 years. Construction Common redwood (the grade most contractors default to) typically lasts only 5–10 years in Bay Area conditions before significant greying, checking, and rot appear. Always ask your contractor which redwood grade is in their bid.