Cost to Build a Deck in Alabama (2026)
A 12×16 ft deck in Alabama runs about $3,674 in pressure-treated pine and $8,375 in composite, installed — 8% below the US average. Here is what moves that number in Alabama, with a calculator priced for the state.
Pressure-treated pine
$18–$23 /sq ft
Cedar
$26–$34 /sq ft
Composite
$39–$51 /sq ft
Deck cost calculator for Alabama
Priced with Alabama labour, material and footing-depth factors. Change any input and the estimate updates.
Estimated installed cost
$7,370 – $9,632
192 sq ft · about $43.62/sq ft
- Materials
- $5,282
- Labour
- $3,093
- Footings (9 in deep)
- 3 × about $119
- Frost-depth adjustment
- −$144
Mid-range estimate for a rectangular deck attached to the house, with one beam line per 12 ft of depth and footings every 8 ft. Excludes demolition, permits and site work. For railing, stairs and a full line-item breakdown use the main deck cost calculator.
Alabama deck cost by size and material
Mid-range installed prices for a standard-height deck attached to the house, including framing, footings at the local depth and hardware. Railing and stairs are priced separately in the main deck cost calculator.
| Deck size | Pressure-treated pine | Cedar | Composite |
|---|---|---|---|
| 10 × 10 ft (100 sq ft) | $1,845 | $2,787 | $4,293 |
| 12 × 12 ft (144 sq ft) | $2,720 | $4,077 | $6,245 |
| 12 × 16 ft (192 sq ft) | $3,674 | $5,484 | $8,375 |
| 16 × 20 ft (320 sq ft) | $5,980 | $8,996 | $13,815 |
| 20 × 20 ft (400 sq ft) | $7,571 | $11,341 | $17,364 |
What drives deck prices in Alabama
Labour
Labour is the biggest regional variable. Carpentry labour in Alabama runs 15% below the national level, so a composite 12×16 that averages $9,216 nationally comes to about $8,375 here. On pressure-treated decks labour is more than half the bill, so the regional gap is widest on the cheapest material.
Climate
Hot, humid summers and well over 50 inches of rain a year make fungal decay and termites the main threats, not frost. Framing that sits close to the ground needs ground-contact treatment and airflow underneath.
Footings and frost depth
Footings in Alabama typically go 6–12 inches deep. At 9 inches each 12 inch footing costs roughly $119 installed, and a 12×16 deck needs about 3 of them — a saving of $144 against the 24 inch depth national prices assume.
Which decking makes sense here
Our pick for most Alabama homes: pressure-treated pine. Southern yellow pine is milled in-state, so pressure-treated framing and decking are about as cheap here as anywhere in the country. Composite adds about $4,701 to a 12×16 deck over pressure-treated — see the full 20-year comparison in the composite vs wood calculator.
Permits and code in Alabama
Alabama has no mandatory statewide residential code for every county, so enforcement depends on where you build: cities such as Birmingham, Huntsville and Mobile adopt the IRC and permit decks, while some rural counties do not. Coastal Baldwin and Mobile counties add wind-uplift connections.
Typical deck permit fees: $75–$300. Expect a footing inspection before concrete, a framing inspection before the decking goes down and a final. Estimate your fee with the deck permit cost calculator, and read our deck permit guide for what the drawings need to show.
Best time to build a deck in Alabama
October to April — the cooler, drier months, when crews have gaps between summer rush jobs.
Compare neighbouring states
- Mississippi — 12×16 pressure-treated about $3,558 (−10% vs US)
- Tennessee — 12×16 pressure-treated about $3,850 (−6% vs US)
- Georgia — 12×16 pressure-treated about $3,848 (−6% vs US)
- Florida — 12×16 pressure-treated about $3,923 (−3% vs US)
Frequently asked questions
How much does it cost to build a deck in Alabama?
A typical 12×16 ft (192 sq ft) deck in Alabama costs about $3,674 installed in pressure-treated pine, $5,484 in cedar and $8,375 in composite. That is $18–$23 per square foot for pressure-treated and $39–$51 for composite — 8% below the US average.
Is a composite deck worth it in Alabama?
On a 12×16 deck composite costs about $4,701 more than pressure-treated up front. Southern yellow pine is milled in-state, so pressure-treated framing and decking are about as cheap here as anywhere in the country. Composite needs no staining, which saves a refinishing cycle every two to three years on wood.
Do I need a permit to build a deck in Alabama?
Alabama has no mandatory statewide residential code for every county, so enforcement depends on where you build: cities such as Birmingham, Huntsville and Mobile adopt the IRC and permit decks, while some rural counties do not. Coastal Baldwin and Mobile counties add wind-uplift connections. Where a permit is required, fees typically run $75–$300. Under the model residential code, a freestanding deck under 200 sq ft and no more than 30 inches above grade that does not serve an exit door is often exempt — attaching it to the house removes that exemption.
How deep do deck footings need to be in Alabama?
Typically 6 to 12 inches depending on the part of the state. At about 9 inches, each 12 inch footing costs roughly $119 installed, compared with $167 at a 24 inch depth. Confirm the exact depth with your building department before digging.
When is the best time to build a deck in Alabama?
October to April — the cooler, drier months, when crews have gaps between summer rush jobs. Booking a builder outside the spring rush often gets a faster start date and a keener price.
Is Alabama expensive for deck building compared with other states?
Alabama ranks 3 of 50 from cheapest to most expensive on our index. Carpentry labour runs 15% below the national level and materials 3% below it, which puts a typical deck 8% below the US average.
Price the rest of the project
How these figures are made: national installed prices per square foot, split into materials and labour and adjusted by a Alabama labour index (reasoned from BLS state carpenter wage data), a material and freight index, and the local footing depth. They are planning estimates — get two or three itemised local quotes. Method.