Deck & Patio Cost Estimator
Pick deck or patio, your size, and material — get an OC price band.
Orange County, CA · Updated 2026 · Ranges from our cost guides — your quote will vary by contractor and scope
How this calculator works: it combines the cost bands published in our Orange County cost guides with a few choices about your project. The output is a range — low, typical, high — with the assumptions listed. It is a planning tool, not a contractor bid.
Your project
Bands re-read from deck-cost-orange-county.html + concrete-patio-cost-orange-county.html at build time 2026-10-15.
What drives the cost
- Decks — pressure-treated wood runs $25–$40/sq ft installed; composite runs $45–$75/sq ft. A 300 sq ft deck: roughly $7,500–$12,000 wood or $13,500–$22,500 composite.
- Concrete patios — plain broom finish $6–$12/sq ft; stamped or decorative $12–$20/sq ft. A typical 400 sq ft patio: $3,000–$5,000 plain or $5,000–$8,000 stamped.
- What's outside the band — grading, drainage, and permits usually price separately from the per-foot install band.
- What's in the quote — material brand and warranty, pattern/color detail for stamped work, and whether grading and permits are included.
Estimate, not a quote
These numbers are estimates only — not a quote, not a bid. Bands are computed from the cost ranges published in our Orange County cost guides (2026), which are themselves compiled from contractor-published pricing and industry data. Your actual price depends on scope, materials, access, timing, and the contractor. Always get 2–3 written quotes and compare the scope line by line, not just the total. We don't sell services and we have no contractor relationships.