Composite deck cost in Idaho
Statewide estimate from BLS wages and BEA prices. Reviewed Nov 4, 2026.
- Statewide range (300 sq ft)
- $11,100 – $22,100
- Per sq ft
- $36.50 – $73.50
- before permit
- Versus US midpoint
- −8%
- US $18,100
- Metros covered
- 3
What does it cost to build a composite deck in Idaho? Plan on $11,100 to $22,100 for 300 sq ft. Wages (0.89x the US blend), materials (price index 96.3) and permit costs (95.5) put the state below the national midpoint by 8%.
Inside Idaho, the metros we cover range from $16,500 (Boise) to $17,400 (Coeur d'Alene) at the midpoint. Pick your closest city in the table for a tighter number.
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Estimated cost for 300 sq ft in Idaho (statewide), standard level
$14,400 to $18,800
About $47.50 to $62.50 per sq ft before permits. Labor is about 58% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $6,000 | $7,850 |
| Labor | $8,300 | $10,800 |
| Permits and fees | $75 | $110 |
| Total | $14,400 | $18,800 |
Cost breakdown for 300 sq ft in Idaho
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $4,600 | $6,950 | $9,250 | 42% |
| Labor | $6,400 | $9,550 | $12,800 | 58% |
| Permits and fees | $50 | $95 | $140 | 1% |
| Total | $11,100 | $16,600 | $22,100 | 100% |
Idaho labor market for composite deck
Idaho's labor line is priced from 2 trades, each compared with its US median wage. After weighting by each trade's share of the work, the state comes out at 0.89 times the national level.
Carpenters (47-2031), 80% of the weighting: a median of $25.00 an hour, 14% below the US median of $29.12. The middle half of them earn between $21.76 and $30.25 an hour. About 8,380 work in the state. That is 97.7 per 10,000 jobs, compared with 43.1 nationally, which suggests plenty of local crews to bid.
For construction laborers (47-2061, weighted 20%) the local median is $22.57 an hour, which is in line with the national $22.66. The middle half of them earn between $19.02 and $26.46 an hour. BLS counts 10,850 of them working in the state, 126.5 for every 10,000 jobs (US: 70.5), so the local bench is deeper than average.
A crew paid at the 75th percentile for carpenters ($30.25 an hour) would add about $1,550 to the statewide midpoint; one at the 25th percentile ($21.76) would take off about $960. Use that as a rough guide to how far a bid can sit from our midpoint on wages alone.
BLS counts 857,440 jobs across Idaho (May 2025), which is 0.6% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 80% | $21.76 | $25.00 | $30.25 | $29.12 | 0.86 | state |
| Construction laborers (47-2061) | 20% | $19.02 | $22.57 | $26.46 | $22.66 | 1.00 | state |
| Blended | 100% | 0.89 | |||||
Idaho metro-by-metro prices
1 of the 3 metros sit above the statewide midpoint of $16,600, and the top-to-bottom gap is 6%. Each row prices the default size with that metro's own BLS wages and BEA price levels, so the gap between rows is real local variation rather than a flat markup.
| Metro | Range (300 sq ft) | Midpoint | vs. state |
|---|---|---|---|
| Coeur d'Alene, ID | $11,600 – $23,200 | $17,400 | +5% |
| Idaho Falls, ID | $11,000 – $22,100 | $16,600 | level |
| Boise, ID | $11,000 – $22,000 | $16,500 | −1% |
If you are planning more than one job in Idaho
Each project weights the trades differently, so Idaho's wage level does not push every price by the same amount. Compared with the US midpoint, paver patio is −1% and wood deck −7%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Wood deck | 300 sq ft | $7,000 – $14,100 | −7% |
| Concrete patio | 300 sq ft | $1,200 – $3,900 | −3% |
| Paver patio | 300 sq ft | $3,000 – $5,400 | −1% |
| Gutters | 160 linear ft | $1,200 – $3,950 | −6% |
Basic, standard or premium: Idaho prices
Bands overlap on purpose, since a good standard job can cost as much as a light premium one. Below are the three bands for the default size, then a grid from 10x12 (120 sq ft) to 20x20 (400 sq ft).
Basic
$11,100 to $15,500
Entry-level composite boards, low deck, simple shape
Standard
$14,400 to $18,800
Mid-grade capped boards with railing and stairs
Premium
$17,700 to $22,100
Premium capped or PVC boards, multi-level, hidden fasteners
| Size | Basic | Standard | Premium |
|---|---|---|---|
| 10x12 (120 sq ft) | $4,450 – $6,250 | $5,800 – $7,600 | $7,150 – $8,950 |
| 12x12 (144 sq ft) | $5,350 – $7,500 | $6,950 – $9,100 | $8,550 – $10,700 |
| 16x20 (320 sq ft) | $11,800 – $16,500 | $15,300 – $20,100 | $18,900 – $23,600 |
| 20x20 (400 sq ft) | $14,700 – $20,600 | $19,100 – $25,100 | $23,600 – $29,500 |
Weather windows across Idaho
Weather decides when exterior installation can happen, and Idaho is not uniform. The table uses NOAA's 1991-2020 climate normals from the weather station nearest each metro we cover, and counts the months that are neither cold nor hot enough to complicate the job.
Every Idaho metro on the list has 8 comfortable months, though rainfall ranges from 10 inches a year in Idaho Falls to 25 in Coeur d'Alene.
We do not adjust prices by month, because we have no reliable published data on seasonal pricing. Timing is still worth raising when you collect bids.
| Metro | Jan avg low °F | Jul avg high °F | Precip (in/yr) | Comfortable months |
|---|---|---|---|---|
| Boise | 26 | 93 | 12 | 8: February through June and September through November |
| Idaho Falls | 12 | 87 | 10 | 8: March through October |
| Coeur d'Alene | 26 | 83 | 25 | 8: March through October |
Idaho versus the states around it
Idaho ranks 37 of 51 (the 50 states plus DC) for composite deck, where 1 is the most expensive. The costliest is Hawaii at $23,800 and the cheapest Oklahoma at $15,300, both for 300 sq ft at the midpoint. Idaho sits at $16,600. The five states closest by workforce center are listed below.
| State | Distance | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Montana | 270 miles away | $11,800 – $23,600 | $17,700 | +7% |
| Utah | 280 miles away | $11,100 – $22,200 | $16,600 | level |
| Oregon | 350 miles away | $12,600 – $25,300 | $19,000 | +14% |
| Washington | 380 miles away | $13,900 – $27,800 | $20,800 | +26% |
| Nevada | 460 miles away | $12,100 – $24,200 | $18,200 | +9% |
Add-ons priced for Idaho
Add-ons start from national price ranges and are scaled by 0.92 for Idaho, which is the average of the area's wage index (0.89) and goods price index (0.96). The estimator above can add them to your total.
| Add-on | Local range |
|---|---|
| Add a deck railing (approx. 0.3 ft per sq ft) | $1,650 – $5,000 |
Why two Idaho quotes can differ
Board grade
Composite materials run $16-$32 per sq ft and the installed price is $40-$80 per sq ft, including the substructure (HomeGuide).
Labor
Labor for composite is $24-$48 per sq ft, higher than wood because the boards need extra parts and more careful assembly.
Drainage
Ground-level decks over poorly draining yards may need $1,000-$4,000 of drainage work first.
Engineering
Large or complex decks may need a structural engineer at $100-$220 an hour to get a permit.
Get 3 local quotes
Tell us about the job and we will try to connect you with up to three local contractors for written quotes. It is free and you are under no obligation to hire. Your estimate of $14,400 to $18,800 for Idaho is attached.
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The report lays out the composite deck numbers for Idaho line by line, with the local wage and price inputs, permit and timing notes, a quote comparison sheet and the full method. Save your estimate above, preview page 1 free, and unlock the full report for $9 one-time, or get every report with CostLocal Pro.
Composite deck in Idaho: your questions
+How much does it cost to build a composite deck in Idaho?
$11,100 to $22,100 for 300 sq ft, using statewide wages and prices. Metro areas inside Idaho can sit above or below that.
+Which city in Idaho is cheapest for composite deck?
Boise at about $16,500 (midpoint, 300 sq ft). The priciest is Coeur d'Alene at $17,400.
+Is composite deck cheaper in Idaho than the US average?
It is 8% cheaper: $16,600 against $18,100 for 300 sq ft at the midpoint.
+What share of the price is labor in Idaho?
About 58% ($9,550). Materials are 42%. Statewide labor for this job is weighted 0.89x the national wage level.
+What do carpenters earn in Idaho?
The BLS statewide median is $25.00 an hour, against $29.12 for the US. The 25th to 75th percentile range is $21.76 to $30.25.
+Where does Idaho rank for composite deck costs?
37th most expensive of 51 (the 50 states plus DC) at the midpoint, $16,600 for 300 sq ft. Rank 1 is the costliest.
+What do basic and premium composite deck work cost in Idaho?
For 300 sq ft, basic work runs $11,100 to $15,500 and premium work $17,700 to $22,100. Basic means: entry-level composite boards, low deck, simple shape. Premium means: premium capped or PVC boards, multi-level, hidden fasteners.
+Does the season matter for composite deck in Idaho?
Yes where winters or summers are hard. Of the Idaho metros we cover, Boise has the most comfortable months (8 of 12) based on NOAA 1991-2020 normals. Our prices do not change by month, so ask contractors whether they charge more or less in busy and slow seasons.
+What does "add a deck railing" add in Idaho?
$1,650 to $5,000 for 300 sq ft, from a national range scaled by the statewide wage and goods indexes.
Composite deck by city in Idaho
Where these numbers come from
Base prices are national ranges from the sources below. We scale labor by local BLS wages, materials by BEA goods prices and permits by the BEA all-items price level. Full method on the methodology page.
- HomeGuide: How Much Does Composite Decking Cost? (2026) (accessed November 4, 2026)
- HomeGuide: 2026 Building Permit Costs | Fees & Cost Calculator (accessed November 4, 2026)
- BLS Occupational Employment and Wage Statistics, May 2025
- BEA Regional Price Parities, 2024
- NOAA NCEI U.S. Climate Normals, 1991-2020