Cost to Build a Deck in Hawaii (2026)
A 12×16 ft deck in Hawaii runs about $5,644 in pressure-treated pine and $12,498 in composite, installed — 37% above the US average. Here is what moves that number in Hawaii, with a calculator priced for the state.
Pressure-treated pine
$26–$34 /sq ft
Cedar
$38–$50 /sq ft
Composite
$58–$76 /sq ft
Deck cost calculator for Hawaii
Priced with Hawaii labour, material and footing-depth factors. Change any input and the estimate updates.
Estimated installed cost
$10,998 – $14,372
192 sq ft · about $65.09/sq ft
- Materials
- $7,820
- Labour
- $4,678
- Footings (12 in deep)
- 3 × about $128
- Frost-depth adjustment
- −$115
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.
Hawaii 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) | $2,885 | $4,258 | $6,454 |
| 12 × 12 ft (144 sq ft) | $4,204 | $6,182 | $9,345 |
| 12 × 16 ft (192 sq ft) | $5,644 | $8,281 | $12,498 |
| 16 × 20 ft (320 sq ft) | $9,292 | $13,686 | $20,714 |
| 20 × 20 ft (400 sq ft) | $11,692 | $17,184 | $25,970 |
What drives deck prices in Hawaii
Labour
Labour is the biggest regional variable. Carpentry labour in Hawaii runs 35% above the national level, so a composite 12×16 that averages $9,216 nationally comes to about $12,498 here. On pressure-treated decks labour is more than half the bill, so the regional gap is widest on the cheapest material.
Climate
Salt air, sun and aggressive termites. Wood rarely lasts long without heavy maintenance, and every board is shipped from the mainland or abroad.
Footings and frost depth
Footings in Hawaii typically go 12 inches deep. At 12 inches each 12 inch footing costs roughly $128 installed, and a 12×16 deck needs about 3 of them — a saving of $115 against the 24 inch depth national prices assume.
Which decking makes sense here
Our pick for most Hawaii homes: composite. Shipping costs make all materials expensive, but termites and salt make composite on treated or steel framing the long-run winner. Composite adds about $6,854 to a 12×16 deck over pressure-treated — see the full 20-year comparison in the composite vs wood calculator.
Permits and code in Hawaii
Counties enforce the IRC with local amendments, and structures on the islands need higher wind design. Permit review in Honolulu can take months.
Typical deck permit fees: $200–$800. 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 Hawaii
Year-round; the drier leeward side is easiest.
Compare neighbouring states
- California — 12×16 pressure-treated about $4,969 (+16% vs US)
- Alaska — 12×16 pressure-treated about $5,885 (+28% vs US)
Frequently asked questions
How much does it cost to build a deck in Hawaii?
A typical 12×16 ft (192 sq ft) deck in Hawaii costs about $5,644 installed in pressure-treated pine, $8,281 in cedar and $12,498 in composite. That is $26–$34 per square foot for pressure-treated and $58–$76 for composite — 37% above the US average.
Is a composite deck worth it in Hawaii?
On a 12×16 deck composite costs about $6,854 more than pressure-treated up front. Shipping costs make all materials expensive, but termites and salt make composite on treated or steel framing the long-run winner. 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 Hawaii?
Counties enforce the IRC with local amendments, and structures on the islands need higher wind design. Permit review in Honolulu can take months. Where a permit is required, fees typically run $200–$800. 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 Hawaii?
Typically 12 inches. At about 12 inches, each 12 inch footing costs roughly $128 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 Hawaii?
Year-round; the drier leeward side is easiest. Booking a builder outside the spring rush often gets a faster start date and a keener price.
Is Hawaii expensive for deck building compared with other states?
Hawaii ranks 50 of 50 from cheapest to most expensive on our index. Carpentry labour runs 35% above the national level and materials 38% above it, which puts a typical deck 37% 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 Hawaii 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.