Composite deck cost in Maine
Statewide estimate from BLS wages and BEA prices. Reviewed Nov 4, 2026.
- Statewide range (300 sq ft)
- $12,000 – $24,100
- Per sq ft
- $40 – $80
- before permit
- Versus US midpoint
- Level
- US $18,100
- Metros covered
- 2
Across Maine, a composite deck costs about $12,000 to $24,100 for 300 sq ft. Statewide, that midpoint is 0% below the US figure of $18,100. Carpenters earn a median $29.88 an hour in Maine (US: $29.12).
Inside Maine, the metros we cover range from $17,300 (Bangor) to $18,500 (Portland) at the midpoint.
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Estimated cost for 300 sq ft in Maine (statewide), standard level
$15,700 to $20,500
About $52 to $68 per sq ft before permits. Labor is about 61% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $6,050 | $7,950 |
| Labor | $9,550 | $12,500 |
| Permits and fees | $80 | $120 |
| Total | $15,700 | $20,500 |
Cost breakdown for 300 sq ft in Maine
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $4,650 | $7,000 | $9,350 | 39% |
| Labor | $7,350 | $11,000 | $14,700 | 61% |
| Permits and fees | $50 | $95 | $150 | 1% |
| Total | $12,000 | $18,100 | $24,100 | 100% |
Composite deck: what moves the price in Maine
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.
Maine versus the states around it
Maine ranks 22 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. Maine sits at $18,100. The five states closest by workforce center are listed below.
| State | Distance | Range | Midpoint | vs. here |
|---|---|---|---|---|
| New Hampshire | 110 miles away | $12,100 – $24,300 | $18,200 | +1% |
| Massachusetts | 120 miles away | $13,900 – $27,800 | $20,900 | +15% |
| Vermont | 150 miles away | $12,100 – $24,300 | $18,200 | +1% |
| Rhode Island | 170 miles away | $12,200 – $24,600 | $18,400 | +2% |
| Connecticut | 220 miles away | $12,600 – $25,200 | $18,900 | +5% |
Add-ons priced for Maine
Extras are quoted nationally and then scaled to Maine by the average of the local wage index (1.02) and goods index (0.97), a factor of 0.99. Tick any of them in the estimator above to add them to your total. Treat these as planning figures: an add-on touches different trades than the main job, so the scaling is an approximation.
| Add-on | Local range |
|---|---|
| Add a deck railing (approx. 0.3 ft per sq ft) | $1,800 – $5,350 |
Quality levels and sizes in Maine
The cited range is cut into three overlapping bands (basic, standard and premium) and scaled to statewide Maine wages and prices. The grid prices the same bands at 4 common sizes.
Basic
$12,000 to $16,900
Entry-level composite boards, low deck, simple shape
Standard
$15,700 to $20,500
Mid-grade capped boards with railing and stairs
Premium
$19,300 to $24,100
Premium capped or PVC boards, multi-level, hidden fasteners
| Size | Basic | Standard | Premium |
|---|---|---|---|
| 10x12 (120 sq ft) | $4,850 – $6,800 | $6,300 – $8,250 | $7,800 – $9,750 |
| 12x12 (144 sq ft) | $5,800 – $8,150 | $7,550 – $9,900 | $9,300 – $11,700 |
| 16x20 (320 sq ft) | $12,800 – $18,000 | $16,700 – $21,900 | $20,600 – $25,700 |
| 20x20 (400 sq ft) | $16,000 – $22,500 | $20,900 – $27,300 | $25,700 – $32,100 |
Maine metro-by-metro prices
1 of the 2 metros sit above the statewide midpoint of $18,100, and the top-to-bottom gap is 7%. 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 |
|---|---|---|---|
| Portland, ME | $12,300 – $24,700 | $18,500 | +2% |
| Bangor, ME | $11,500 – $23,000 | $17,300 | −5% |
What carpenters and the other trades earn in Maine
Statewide wages come from BLS's state-level estimates, which blend big cities with small towns and rural areas. 2 trades drive the labor line for this job, and the weighted ratio against the national wage level is 1.02 for Maine.
For carpenters (47-2031, weighted 80%) the local median is $29.88 an hour, which is in line with the national $29.12. The middle half of them earn between $25.46 and $35.00 an hour. BLS counts 5,170 of them working in the state, 80.7 for every 10,000 jobs (US: 43.1), so the local bench is deeper than average.
Construction laborers (47-2061), 20% of the weighting: a median of $22.32 an hour, in line with the US median of $22.66. The middle half of them earn between $19.51 and $25.51 an hour. About 3,960 work in the state. That is 61.8 per 10,000 jobs, compared with 70.5 nationally, so the supply of crews looks typical.
A crew paid at the 75th percentile for carpenters ($35.00 an hour) would add about $1,500 to the statewide midpoint; one at the 25th percentile ($25.46) would take off about $1,300. Use that as a rough guide to how far a bid can sit from our midpoint on wages alone.
BLS counts 640,610 jobs across Maine (May 2025), which is 0.4% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 80% | $25.46 | $29.88 | $35.00 | $29.12 | 1.03 | state |
| Construction laborers (47-2061) | 20% | $19.51 | $22.32 | $25.51 | $22.66 | 0.98 | state |
| Blended | 100% | 1.02 | |||||
Related projects, priced for Maine
The table prices neighboring jobs at their usual sizes using statewide Maine wages and prices. Against national midpoints, wood deck comes out highest (−1%) and paver patio lowest (−5%), because each job leans on different trades.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Wood deck | 300 sq ft | $7,500 – $15,000 | −1% |
| Concrete patio | 300 sq ft | $1,200 – $3,900 | −2% |
| Paver patio | 300 sq ft | $2,850 – $5,150 | −5% |
| Gutters | 160 linear ft | $1,250 – $4,100 | −3% |
Weather windows across Maine
Season matters for composite deck. For each Maine metro below we took NOAA's 1991-2020 monthly normals from the nearest suitable station and counted comfortable months for exterior installation.
Every Maine metro on the list has 8 comfortable months, though rainfall ranges from 42 inches a year in Bangor to 48 in Portland.
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 |
|---|---|---|---|---|
| Portland | 16 | 80 | 48 | 8: April through November |
| Bangor | 9 | 80 | 42 | 8: April through November |
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Composite deck in Maine: your questions
+How much does it cost to build a composite deck in Maine?
$12,000 to $24,100 for 300 sq ft, using statewide wages and prices. Metro areas inside Maine can sit above or below that.
+Which city in Maine is cheapest for composite deck?
Bangor at about $17,300 (midpoint, 300 sq ft). The priciest is Portland at $18,500.
+Is composite deck cheaper in Maine than the US average?
It is 0% cheaper: $18,100 against $18,100 for 300 sq ft at the midpoint.
+What share of the price is labor in Maine?
About 61% ($11,000). Materials are 39%. Statewide labor for this job is weighted 1.02x the national wage level.
+What do carpenters earn in Maine?
The BLS statewide median is $29.88 an hour, against $29.12 for the US. The 25th to 75th percentile range is $25.46 to $35.00.
+Where does Maine rank for composite deck costs?
22nd most expensive of 51 (the 50 states plus DC) at the midpoint, $18,100 for 300 sq ft. Rank 1 is the costliest.
+What do basic and premium composite deck work cost in Maine?
For 300 sq ft, basic work runs $12,000 to $16,900 and premium work $19,300 to $24,100. 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 Maine?
Yes where winters or summers are hard. Of the Maine metros we cover, Portland 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 Maine?
$1,800 to $5,350 for 300 sq ft, from a national range scaled by the statewide wage and goods indexes.
Composite deck by city in Maine
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