Deck Building Cost in Casper, WY (2026)
Updated October 2026 · Casper, WY · index 0.95
How much does it cost to build a deck in Casper? For a 300 sq ft deck with pressure-treated wood, homeowners in Casper, WY pay about $10,700 on average, and most quotes land between $7,400 and $14,000 — $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 Casper runs 5% below the U.S. average: construction labor in the Casper area runs 8% below the national mean, materials 2% below. The same job averages $11,300 nationally and about $11,100 at the Wyoming statewide index.
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Deck building price in Casper by decking material
What a 300 sq ft deck costs in Casper with each decking material, installed:
| Option | Average · range |
|---|---|
| Pressure-treated woodtreated pine or fir boards, stained and sealed$36 per sq ft | $10,700$7,400 – $14,000 |
| Capped compositehidden fasteners and a picture-frame border$43 per sq ft | $12,800$9,100 – $16,500 |
The least expensive option in Casper is pressure-treated wood, at about $10,700; capped composite averages $12,800, 1.2 times as much.
Cost to build a deck in Casper by size
With pressure-treated wood, priced for Casper, WY:
| Size | Average · range |
|---|---|
| A 200 sq ft deck$38 per sq ft | $7,700$5,250 – $10,100 |
| A 300 sq ft deck$36 per sq ft | $10,700$7,400 – $14,000 |
| A 400 sq ft deck$34 per sq ft | $13,700$9,550 – $17,900 |
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: $34 per sq ft for a 400 sq ft deck against $38 for a 200 sq ft deck.
What a deck building in Casper includes
Line by line, the $10,700 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 – $520 |
| Footings below the frost line | $390 – $790 |
| Flashed ledger on the house | $240 – $460 |
| 6x6 posts | $260 – $520 |
| Beams | $240 – $460 |
| Joist framing with hangers | $1,350 – $2,300 |
| Deck boards | $1,250 – $1,900 |
| One set of stairs (4 steps) | $490 – $980 |
| Railing | $1,800 – $3,100 |
| Fascia and skirting | $340 – $820 |
| Final inspection and cleanup | $140 – $350 |
| Stain and seal, two coats | $310 – $730 |
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 Casper's index of 0.95; permit fees are not scaled.
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What affects deck building prices in Casper
Labor and materials in Casper
Construction wages in the Casper area run 8% below the U.S. mean (BLS, May 2025), and materials in its ZIP codes price 2% below the national average. Together they give Casper a construction cost index of 0.95.
Where Casper sits in Wyoming
Casper is the 2nd most expensive of the 3 Wyoming cities in our index, against a statewide index of 0.99. Cheyenne is the dearest at 0.98; no Wyoming city in it costs less.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Casper ranks 212th from the most expensive. The job that averages $10,700 here averages $11,300 at the national rate.
The deck code in Wyoming
There is no statewide code; decks follow the International Residential Code as the cities and counties of Wyoming adopt it (Cheyenne, Casper and Gillette: 2024 IRC; Teton County: confirm locally). 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 depths differ between the towns: Cheyenne and Casper 36 in., Gillette 42 in.
What decks are built of in Wyoming
Most used on decks in the Mountain states: capped composite, then treated hem-fir or fir 2x6, then cedar.
Sales tax in Wyoming
Wyoming's base state sales tax is 4%, 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 Casper contractor will ask before quoting
- Reuse the frame or rebuild?
- Height, railing style and stairs
- Board brand and color
Deck building cost in other Wyoming cities
A 300 sq ft deck with pressure-treated wood averages $10,700 in Casper; $11,000 in Cheyenne, $10,700 in Laramie.
| City | Average · range |
|---|---|
| Cheyenne, WY3% more | $11,000$7,650 – $14,400 |
| Laramie, WYsame as Casper | $10,700$7,400 – $14,000 |
deck building price in Casper: questions
How much does it cost to build a deck in Casper, WY?
About $10,700 for a 300 sq ft deck with pressure-treated wood, and most Casper quotes fall between $7,400 and $14,000. That is 5% below the U.S. average, where the same job averages $11,300.
What is the deck price per square foot in Casper?
$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 Casper?
$9,550 to $17,900, about $13,700 on average, with pressure-treated wood — $34 per sq ft.
Do you need a permit for deck building in Casper?
Yes — a new deck needs a permit nearly everywhere, Casper included. In Wyoming, decks follow the International Residential Code as the cities and counties of Wyoming adopt it (Cheyenne, Casper and Gillette: 2024 IRC; Teton County: confirm locally). The prices on this page carry $350–$1,050 for plans, permit and layout.
Does the price include sales tax in Wyoming?
No. The prices here are before tax; Wyoming's base state rate is 4%, plus any local rate.
What decking do people choose in Wyoming?
Most used on decks in the Mountain states: capped composite, then treated hem-fir or fir 2x6, then cedar.
Other home projects in Casper
Deck building cost in Wyoming
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 Casper's construction cost index of 0.95.
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 Casper, each on its own base: RSMeans residential 0.91, HUD 0.87, Craftsman 1.00. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Casper 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