Deck Building Cost in San Antonio, TX
A 16×20 ft deck in San Antonio costs $7,100 (pressure-treated) to $15,300 (composite) — 2% above the national average.
San Antonio — PT Wood Deck (16×20)
$7,100
$22/sqft installed
Composite (Trex)
$15,300
$48/sqft; low-maintenance
vs National Average
2% above
San Antonio labor market
Deck Cost in San Antonio by Material — 2026 (16×20 ft, 320 sqft)
| Material | Total Cost | Per Sqft | Lifespan |
|---|---|---|---|
| Pressure-treated wood | $7,100 | $22/sqft | 15–20 yrs |
| Cedar / Redwood | $10,700 | $33/sqft | 20–30 yrs |
| Composite (Trex, Fiberon) | $15,300 | $48/sqft | 25–30 yrs |
| PVC / capped composite | $17,300 | $54/sqft | 30–50 yrs |
Includes framing, decking, 1 set of stairs, basic railing, and permit. Second story or rooftop decks add 25–50%. San Antonio labor rates are 2% above the national average.
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Deck builder quotes vary $2,000–$5,000 in San Antonio for the same project. Get 3 bids from licensed contractors.
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FAQs — Deck Cost in San Antonio
How much does a deck cost in San Antonio?
A standard 16×20 ft deck (320 sqft) in San Antonio, TX costs $7,100 for pressure-treated wood, $10,700 for cedar, and $15,300 for composite (Trex) — 2% above the national average of $8,500. Per-sqft rates: PT wood $22/sqft, composite $48/sqft. Costs include framing, decking boards, stairs, and basic railings.
Is composite or wood decking better in San Antonio?
In San Antonio's moderate climate, pressure-treated wood ($7,100) is cost-effective if you're willing to seal it every 2–3 years. Composite ($15,300) is the no-maintenance premium choice. Break-even on composite vs. PT wood maintenance savings is typically 10–12 years.
Do I need a permit to build a deck in San Antonio?
Yes — most deck projects in San Antonio require a building permit if the deck is attached to the house, over 30 inches off the ground, or over 200 sqft. Permits cost $150–$400 in San Antonio and require structural drawings and a post-installation inspection. A licensed TX contractor will handle permits as part of the project. Unpermitted decks must be disclosed at sale and may need to be removed or permitted retroactively.
How much does a 12×12 deck cost in San Antonio?
A 12×12 ft deck (144 sqft) in San Antonio, TX costs: PT wood $3900–$4600, cedar $5900–$7000, composite $8400–$9900. Smaller decks have higher per-sqft costs since fixed costs (footings, framing, stairs) spread over fewer square feet. A 12×12 is popular for smaller yards and costs approximately 55–65% of a 16×20.
What is the ROI on a deck in San Antonio?
A wood deck in San Antonio recoups approximately 65–75% of cost at resale according to Remodeling Magazine's Cost vs. Value report. A $7,100 PT wood deck adds $5000–$5300 to your home's value. Composite decks often recoup a similar dollar amount to wood but at a higher cost, so the percentage ROI is lower. In San Antonio's market, outdoor living spaces are increasingly valued — a well-built deck is one of the top outdoor ROI projects.