Deck Building Cost in Coeur d'Alene, ID (2026)
Updated October 2026 · Coeur d'Alene, ID · index 0.96
How much does it cost to build a deck in Coeur d'Alene? For a 300 sq ft deck with pressure-treated wood, homeowners in Coeur d'Alene, ID pay about $10,800 on average, and most quotes land between $7,450 and $14,100 — $25 to $47 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 Coeur d'Alene runs 4% below the U.S. average: construction labor in the Coeur d'Alene area runs 7% below the national mean, materials sit at the national level. The same job averages $11,300 nationally and about $10,600 at the Idaho statewide index.
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Deck building price in Coeur d'Alene by decking material
What a 300 sq ft deck costs in Coeur d'Alene with each decking material, installed:
| Option | Average · range |
|---|---|
| Pressure-treated woodtreated pine or fir boards, stained and sealed$36 per sq ft | $10,800$7,450 – $14,100 |
| Capped compositehidden fasteners and a picture-frame border$43 per sq ft | $13,000$9,200 – $16,700 |
The least expensive option in Coeur d'Alene is pressure-treated wood, at about $10,800; capped composite averages $13,000, 1.2 times as much.
Cost to build a deck in Coeur d'Alene by size
With pressure-treated wood, priced for Coeur d'Alene, ID:
| Size | Average · range |
|---|---|
| A 200 sq ft deck$39 per sq ft | $7,750$5,300 – $10,200 |
| A 300 sq ft deck$36 per sq ft | $10,800$7,450 – $14,100 |
| A 400 sq ft deck$35 per sq ft | $13,800$9,650 – $18,000 |
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: $35 per sq ft for a 400 sq ft deck against $39 for a 200 sq ft deck.
What a deck building in Coeur d'Alene includes
Line by line, the $10,800 average for a 300 sq ft deck breaks down like this: 47% labor, 53% materials and equipment.
| Line | Low – high |
|---|---|
| Plans, permit and layout | $350 – $1,050 |
| Ground prep, fabric and gravel | $210 – $530 |
| Footings below the frost line | $400 – $790 |
| Flashed ledger on the house | $240 – $460 |
| 6x6 posts | $260 – $530 |
| Beams | $240 – $460 |
| Joist framing with hangers | $1,400 – $2,350 |
| Deck boards | $1,250 – $1,900 |
| One set of stairs (4 steps) | $490 – $990 |
| Railing | $1,800 – $3,150 |
| Fascia and skirting | $340 – $830 |
| Final inspection and cleanup | $140 – $350 |
| Stain and seal, two coats | $320 – $740 |
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 Coeur d'Alene's index of 0.96; permit fees are not scaled.
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What affects deck building prices in Coeur d'Alene
Labor and materials in Coeur d'Alene
Construction wages in the Coeur d'Alene area run 7% below the U.S. mean (BLS, May 2025), and materials in its ZIP codes price right at the national average. Together they give Coeur d'Alene a construction cost index of 0.96.
Where Coeur d'Alene sits in Idaho
Coeur d'Alene is the 4th most expensive of the 5 Idaho cities in our index, against a statewide index of 0.94. Boise is the dearest at 0.97; Pocatello is the least expensive at 0.92.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Coeur d'Alene ranks 201st from the most expensive. The job that averages $10,800 here averages $11,300 at the national rate.
Frost depth in Idaho
Deck footings go below the frost line, or they heave by the second spring. The typical code frost depth in Idaho is about 30 in.. Your building department sets the exact figure.
The deck code in Idaho
Decks here are built to the Idaho Residential Code (2018 IRC with Idaho 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.
What decks are built of in Idaho
Most used on decks in the Mountain states: capped composite, then treated hem-fir or fir 2x6, then cedar.
Sales tax in Idaho
Idaho's base state sales tax is 6%, 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 Coeur d'Alene contractor will ask before quoting
- Reuse the frame or rebuild?
- Height, railing style and stairs
- Board brand and color
Deck building cost in other Idaho cities
A 300 sq ft deck with pressure-treated wood averages $10,800 in Coeur d'Alene; $10,400 in Pocatello, $10,900 in Idaho Falls, $10,900 in Meridian.
| City | Average · range |
|---|---|
| Pocatello, ID4% less | $10,400$7,150 – $13,500 |
| Idaho Falls, ID1% more | $10,900$7,550 – $14,300 |
| Meridian, ID1% more | $10,900$7,550 – $14,300 |
| Boise, ID1% more | $10,900$7,550 – $14,300 |
deck building price in Coeur d'Alene: questions
How much does it cost to build a deck in Coeur d'Alene, ID?
About $10,800 for a 300 sq ft deck with pressure-treated wood, and most Coeur d'Alene quotes fall between $7,450 and $14,100. That is 4% below the U.S. average, where the same job averages $11,300.
What is the deck price per square foot in Coeur d'Alene?
$25 to $47 per sq ft, about $36 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 Coeur d'Alene?
$9,650 to $18,000, about $13,800 on average, with pressure-treated wood — $35 per sq ft.
Do you need a permit for deck building in Coeur d'Alene?
Yes — a new deck needs a permit nearly everywhere, Coeur d'Alene included. In Idaho, decks follow the Idaho Residential Code (2018 IRC with Idaho amendments). The prices on this page carry $350–$1,050 for plans, permit and layout.
Does the price include sales tax in Idaho?
No. The prices here are before tax; Idaho's base state rate is 6%, plus any local rate.
What decking do people choose in Idaho?
Most used on decks in the Mountain states: capped composite, then treated hem-fir or fir 2x6, then cedar.
Other home projects in Coeur d'Alene
Deck building cost in Idaho
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 Coeur d'Alene's construction cost index of 0.96.
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 Coeur d'Alene, each on its own base: Craftsman 0.93. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Coeur d'Alene 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