Deck Building Cost in Duluth, MN (2026)
Updated October 2026 · Duluth, MN · index 1.05
How much does it cost to build a deck in Duluth? For a 300 sq ft deck with pressure-treated wood, homeowners in Duluth, MN pay about $11,800 on average, and most quotes land between $8,150 and $15,500 — $27 to $52 per sq ft. The price covers plans and the permit, footings, a framed and flashed structure, the deck boards, railing, one set of stairs, fascia and cleanup.
The deck building price in Duluth runs 5% above the U.S. average: construction labor in the Duluth area runs 9% above the national mean, materials 2% below. The same job averages $11,300 nationally and about $12,300 at the Minnesota statewide index.
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Deck building price in Duluth by decking material
What a 300 sq ft deck costs in Duluth with each decking material, installed:
| Option | Average · range |
|---|---|
| Pressure-treated woodtreated pine or fir boards, stained and sealed$39 per sq ft | $11,800$8,150 – $15,500 |
| Capped compositehidden fasteners and a picture-frame border$47 per sq ft | $14,200$10,100 – $18,300 |
The least expensive option in Duluth is pressure-treated wood, at about $11,800; capped composite averages $14,200, 1.2 times as much.
Cost to build a deck in Duluth by size
With pressure-treated wood, priced for Duluth, MN:
| Size | Average · range |
|---|---|
| A 200 sq ft deck$42 per sq ft | $8,500$5,800 – $11,200 |
| A 300 sq ft deck$39 per sq ft | $11,800$8,150 – $15,500 |
| A 400 sq ft deck$38 per sq ft | $15,100$10,500 – $19,700 |
Some costs stay the same whatever the size — plans, permit and layout, one set of stairs (4 steps), final inspection and cleanup — so a bigger job costs less per unit: $38 per sq ft for a 400 sq ft deck against $42 for a 200 sq ft deck.
What a deck building in Duluth includes
Line by line, the $11,800 average for a 300 sq ft deck breaks down like this: 47% labor, 53% materials and equipment.
| Line | Low – high |
|---|---|
| Plans, permit and layout | $390 – $1,150 |
| Ground prep, fabric and gravel | $230 – $580 |
| Footings below the frost line | $430 – $870 |
| Flashed ledger on the house | $260 – $510 |
| 6x6 posts | $290 – $580 |
| Beams | $260 – $510 |
| Joist framing with hangers | $1,500 – $2,550 |
| Deck boards | $1,400 – $2,100 |
| One set of stairs (4 steps) | $540 – $1,100 |
| Railing | $2,000 – $3,450 |
| Fascia and skirting | $380 – $900 |
| Final inspection and cleanup | $150 – $390 |
| Stain and seal, two coats | $350 – $810 |
Each line is the price book's U.S. rate for that step, scaled by 0.74 to the installed price published sources give for the whole job (see how these prices are built), times Duluth's index of 1.05; permit fees are not scaled.
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What affects deck building prices in Duluth
Labor and materials in Duluth
Construction wages in the Duluth metro run 9% above the U.S. mean (BLS, May 2025), and specialty-contractor pay in the city's county moves that down by 1%, to 9% above the national mean. Materials in the area's ZIP codes price 2% below the national average. Together they give Duluth a construction cost index of 1.05.
Where Duluth sits in Minnesota
Duluth is the 5th most expensive of the 5 Minnesota cities in our index, against a statewide index of 1.09. St. Paul is the dearest at 1.17; no Minnesota city in it costs less.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Duluth ranks 115th from the most expensive. The job that averages $11,800 here averages $11,300 at the national rate.
The deck code in Minnesota
Decks here are built to the 2020 Minnesota Residential Code, Chapter 1309 (2018 IRC with Minnesota amendments). Guards are required at 36 in. where the deck is more than 30 in. up, and stair risers can be up to 7.75 in. Frost: 42 in. in Zone II (the Twin Cities and the south), 60 in. in Zone I (the north), by county (1303.1600).
What decks are built of in Minnesota
Most used on decks in the Plains states: treated pine, then capped composite, then cedar.
Sales tax in Minnesota
Minnesota's base state sales tax is 6.875%, and cities and counties can add their own. How it applies to a home-improvement contract varies, so ask whether a quote includes it. Prices on this page are before tax.
What a Duluth contractor will ask before quoting
- Reuse the frame or rebuild?
- Height, railing style and stairs
- Board brand and color
Deck building cost in other Minnesota cities
A 300 sq ft deck with pressure-treated wood averages $11,800 in Duluth; $12,300 in Rochester, $12,600 in Eagan, $13,200 in St. Paul.
| City | Average · range |
|---|---|
| Rochester, MN4% more | $12,300$8,500 – $16,000 |
| Eagan, MN7% more | $12,600$8,700 – $16,500 |
| St. Paul, MN11% more | $13,200$9,100 – $17,200 |
| Minneapolis, MN10% more | $12,900$8,950 – $16,900 |
deck building price in Duluth: questions
How much does it cost to build a deck in Duluth, MN?
About $11,800 for a 300 sq ft deck with pressure-treated wood, and most Duluth quotes fall between $8,150 and $15,500. That is 5% above the U.S. average, where the same job averages $11,300.
What is the deck price per square foot in Duluth?
$27 to $52 per sq ft, about $39 on average with pressure-treated wood. Smaller jobs cost more per unit, because the fixed costs are spread over less.
How much is a 400 sq ft deck in Duluth?
$10,500 to $19,700, about $15,100 on average, with pressure-treated wood — $38 per sq ft.
Do you need a permit for deck building in Duluth?
Yes — a new deck needs a permit nearly everywhere, Duluth included. In Minnesota, decks follow the 2020 Minnesota Residential Code, Chapter 1309 (2018 IRC with Minnesota amendments). The prices on this page carry $390–$1,150 for plans, permit and layout.
Does the price include sales tax in Minnesota?
No. The prices here are before tax; Minnesota's base state rate is 6.875%, plus any local rate.
What decking do people choose in Minnesota?
Most used on decks in the Plains states: treated pine, then capped composite, then cedar.
Other home projects in Duluth
Deck building cost in Minnesota
How these prices are built
Every price on this page comes from JobFlex's contractor price book: what a homeowner pays a licensed contractor for each step of the job, as a U.S. national average per unit, with the contractor's overhead and profit included and sales tax left out. The deck building is priced step by step, then multiplied by Duluth's construction cost index of 1.05.
Where the price book's steps for an option add up to more than 20% over the installed price a published source gives for the whole job, every step but a permit fee is scaled down to the middle of that range: pressure-treated wood × 0.74 (HomeGuide 2026: $25–$50 per sq ft); capped composite × 0.80 (Ergeon 2026: $30–$60 per sq ft).
The index weighs local construction wages (BLS Occupational Employment and Wage Statistics, May 2025) at 60% and the area's material prices (Craftsman ZIP-area factors) at 40%. Published indices for Duluth, each on its own base: HUD 1.07, Craftsman 1.01. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Duluth build quotes like these with JobFlex's Deck Studio.
- HomeGuide 2026: pressure-treated deck $25-$50/sqft installed, labor $15-$30/sqft
- Ergeon 2026: composite deck $30-$60/sqft installed
- HomeGuide 2026: composite railing $25-$60/lf, aluminum $50-$200/lf installed