Cost to Build a Deck in Alaska (2026)
A 12×16 ft deck in Alaska runs about $5,885 in pressure-treated pine and $12,299 in composite, installed — 28% above the US average. Here is what moves that number in Alaska, with a calculator priced for the state.
Pressure-treated pine
$25–$33 /sq ft
Cedar
$35–$46 /sq ft
Composite
$54–$71 /sq ft
Deck cost calculator for Alaska
Priced with Alaska labour, material and footing-depth factors. Change any input and the estimate updates.
Estimated installed cost
$10,823 – $14,143
192 sq ft · about $64.05/sq ft
- Materials
- $7,357
- Labour
- $4,941
- Footings (69 in deep)
- 3 × about $311
- Frost-depth adjustment
- +$432
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.
Alaska 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) | $3,272 | $4,444 | $6,612 |
| 12 × 12 ft (144 sq ft) | $4,522 | $6,210 | $9,332 |
| 12 × 16 ft (192 sq ft) | $5,885 | $8,135 | $12,299 |
| 16 × 20 ft (320 sq ft) | $10,241 | $13,991 | $20,930 |
| 20 × 20 ft (400 sq ft) | $12,513 | $17,201 | $25,874 |
What drives deck prices in Alaska
Labour
Labour is the biggest regional variable. Carpentry labour in Alaska runs 30% above the national level, so a composite 12×16 that averages $9,216 nationally comes to about $12,299 here. On pressure-treated decks labour is more than half the bill, so the regional gap is widest on the cheapest material.
Climate
Deep frost, permafrost in the interior and months of snow load decide the design. Frost heave will lift a shallow footing, so footings go below the local frost line or onto engineered helical piles.
Footings and frost depth
Footings in Alaska typically go 42–96 inches deep. At 69 inches each 12 inch footing costs roughly $311 installed, and a 12×16 deck needs about 3 of them — a premium of $432 against the 24 inch depth national prices assume.
Which decking makes sense here
Our pick for most Alaska homes: composite. Nearly all decking is shipped in, which narrows the price gap, and composite shrugs off the freeze-thaw cycling that checks and splits wood boards. Composite adds about $6,413 to a 12×16 deck over pressure-treated — see the full 20-year comparison in the composite vs wood calculator.
Permits and code in Alaska
Anchorage, Fairbanks and Juneau enforce the IRC with local snow-load amendments, and many rural boroughs have no building department at all. Where snow load exceeds the 40 psf deck live load, the frame has to be sized for the higher figure.
Typical deck permit fees: $150–$600. 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 Alaska
June to August — a short window, so contractors book up by early spring.
Compare neighbouring states
- Washington — 12×16 pressure-treated about $4,706 (+8% vs US)
- Hawaii — 12×16 pressure-treated about $5,644 (+37% vs US)
Frequently asked questions
How much does it cost to build a deck in Alaska?
A typical 12×16 ft (192 sq ft) deck in Alaska costs about $5,885 installed in pressure-treated pine, $8,135 in cedar and $12,299 in composite. That is $25–$33 per square foot for pressure-treated and $54–$71 for composite — 28% above the US average.
Is a composite deck worth it in Alaska?
On a 12×16 deck composite costs about $6,413 more than pressure-treated up front. Nearly all decking is shipped in, which narrows the price gap, and composite shrugs off the freeze-thaw cycling that checks and splits wood boards. 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 Alaska?
Anchorage, Fairbanks and Juneau enforce the IRC with local snow-load amendments, and many rural boroughs have no building department at all. Where snow load exceeds the 40 psf deck live load, the frame has to be sized for the higher figure. Where a permit is required, fees typically run $150–$600. 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 Alaska?
Typically 42 to 96 inches depending on the part of the state. At about 69 inches, each 12 inch footing costs roughly $311 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 Alaska?
June to August — a short window, so contractors book up by early spring. Booking a builder outside the spring rush often gets a faster start date and a keener price.
Is Alaska expensive for deck building compared with other states?
Alaska ranks 49 of 50 from cheapest to most expensive on our index. Carpentry labour runs 30% above the national level and materials 28% above it, which puts a typical deck 28% above 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 Alaska 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.