Deck Building Cost in Phoenix, AZ
A 16×20 ft deck in Phoenix costs $7,000 (pressure-treated) to $15,000 (composite) — 0% above the national average.
Phoenix — PT Wood Deck (16×20)
$7,000
$22/sqft installed
Composite (Trex)
$15,000
$47/sqft; low-maintenance
vs National Average
0% above
Phoenix labor market
Deck Cost in Phoenix by Material — 2026 (16×20 ft, 320 sqft)
| Material | Total Cost | Per Sqft | Lifespan |
|---|---|---|---|
| Pressure-treated wood | $7,000 | $22/sqft | 15–20 yrs |
| Cedar / Redwood | $10,500 | $33/sqft | 20–30 yrs |
| Composite (Trex, Fiberon) | $15,000 | $47/sqft | 25–30 yrs |
| PVC / capped composite | $17,100 | $53/sqft | 30–50 yrs |
Includes framing, decking, 1 set of stairs, basic railing, and permit. Second story or rooftop decks add 25–50%. Phoenix labor rates are 0% above the national average.
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Deck builder quotes vary $2,000–$5,000 in Phoenix for the same project. Get 3 bids from licensed contractors.
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FAQs — Deck Cost in Phoenix
How much does a deck cost in Phoenix?
A standard 16×20 ft deck (320 sqft) in Phoenix, AZ costs $7,000 for pressure-treated wood, $10,500 for cedar, and $15,000 for composite (Trex) — 0% above the national average of $8,500. Per-sqft rates: PT wood $22/sqft, composite $47/sqft. Costs include framing, decking boards, stairs, and basic railings.
Is composite or wood decking better in Phoenix?
In Phoenix's moderate climate, pressure-treated wood ($7,000) is cost-effective if you're willing to seal it every 2–3 years. Composite ($15,000) 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 Phoenix?
Yes — most deck projects in Phoenix 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 Phoenix and require structural drawings and a post-installation inspection. A licensed AZ 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 Phoenix?
A 12×12 ft deck (144 sqft) in Phoenix, AZ costs: PT wood $3900–$4600, cedar $5800–$6800, composite $8300–$9800. 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 Phoenix?
A wood deck in Phoenix recoups approximately 65–75% of cost at resale according to Remodeling Magazine's Cost vs. Value report. A $7,000 PT wood deck adds $4900–$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 Phoenix's market, outdoor living spaces are increasingly valued — a well-built deck is one of the top outdoor ROI projects.