Deck Building Cost in Salt Lake City, UT (2026)
Updated October 2026 · Salt Lake City, UT · index 0.98
How much does it cost to build a deck in Salt Lake City? For a 300 sq ft deck with pressure-treated wood, homeowners in Salt Lake City, UT pay about $11,000 on average, and most quotes land between $7,650 and $14,400 — $25 to $48 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 Salt Lake City runs 2% below the U.S. average: construction labor in the Salt Lake City area runs 5% below the national mean, materials 2% above. The same job averages $11,300 nationally and about $10,700 at the Utah statewide index.
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Deck building price in Salt Lake City by decking material
What a 300 sq ft deck costs in Salt Lake City with each decking material, installed:
| Option | Average · range |
|---|---|
| Pressure-treated woodtreated pine or fir boards, stained and sealed$37 per sq ft | $11,000$7,650 – $14,400 |
| Capped compositehidden fasteners and a picture-frame border$44 per sq ft | $13,200$9,400 – $17,100 |
The least expensive option in Salt Lake City is pressure-treated wood, at about $11,000; capped composite averages $13,200, 1.2 times as much.
Cost to build a deck in Salt Lake City by size
With pressure-treated wood, priced for Salt Lake City, UT:
| Size | Average · range |
|---|---|
| A 200 sq ft deck$40 per sq ft | $7,950$5,400 – $10,400 |
| A 300 sq ft deck$37 per sq ft | $11,000$7,650 – $14,400 |
| A 400 sq ft deck$35 per sq ft | $14,100$9,850 – $18,400 |
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 $40 for a 200 sq ft deck.
What a deck building in Salt Lake City includes
Line by line, the $11,000 average for a 300 sq ft deck breaks down like this: 47% labor, 53% materials and equipment.
| Line | Low – high |
|---|---|
| Plans, permit and layout | $360 – $1,100 |
| Ground prep, fabric and gravel | $220 – $540 |
| Footings below the frost line | $410 – $810 |
| Flashed ledger on the house | $240 – $470 |
| 6x6 posts | $270 – $540 |
| Beams | $240 – $470 |
| Joist framing with hangers | $1,400 – $2,400 |
| Deck boards | $1,300 – $1,950 |
| One set of stairs (4 steps) | $500 – $1,000 |
| Railing | $1,850 – $3,200 |
| Fascia and skirting | $350 – $840 |
| Final inspection and cleanup | $140 – $360 |
| Stain and seal, two coats | $320 – $760 |
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 Salt Lake City's index of 0.98; permit fees are not scaled.
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What affects deck building prices in Salt Lake City
Labor and materials in Salt Lake City
Construction wages in the Salt Lake City area run 5% below the U.S. mean (BLS, May 2025), and materials in its ZIP codes price 2% above the national average. Together they give Salt Lake City a construction cost index of 0.98.
Where Salt Lake City sits in Utah
Salt Lake City is the most expensive of the 4 Utah cities in our index, against a statewide index of 0.95. St. George is the least expensive at 0.91.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Salt Lake City ranks 175th from the most expensive. The job that averages $11,000 here averages $11,300 at the national rate.
Frost depth in Utah
Deck footings go below the frost line, or they heave by the second spring. The typical code frost depth in Utah is about 30 in.. Your building department sets the exact figure.
The deck code in Utah
Decks here are built to the Utah State Construction Code (2021 IRC with Utah amendments, Title 15A). Guards are required at 36 in. where the deck is more than 30 in. up, and stair risers can be up to 8 in. Stairs: risers up to 8 in. on treads at least 9 in. deep (15A-3-202).
What decks are built of in Utah
Most used on decks in the Mountain states: capped composite, then treated hem-fir or fir 2x6, then cedar.
Sales tax in Utah
Utah's base state sales tax is 6.1%, 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 Salt Lake City contractor will ask before quoting
- Reuse the frame or rebuild?
- Height, railing style and stairs
- Board brand and color
Deck building cost in other Utah cities
A 300 sq ft deck with pressure-treated wood averages $11,000 in Salt Lake City; $10,600 in Provo, $10,500 in Ogden, $10,200 in St. George.
| City | Average · range |
|---|---|
| Provo, UT4% less | $10,600$7,300 – $13,800 |
| Ogden, UT5% less | $10,500$7,250 – $13,700 |
| St. George, UT7% less | $10,200$7,100 – $13,400 |
deck building price in Salt Lake City: questions
How much does it cost to build a deck in Salt Lake City, UT?
About $11,000 for a 300 sq ft deck with pressure-treated wood, and most Salt Lake City quotes fall between $7,650 and $14,400. That is 2% below the U.S. average, where the same job averages $11,300.
What is the deck price per square foot in Salt Lake City?
$25 to $48 per sq ft, about $37 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 Salt Lake City?
$9,850 to $18,400, about $14,100 on average, with pressure-treated wood — $35 per sq ft.
Do you need a permit for deck building in Salt Lake City?
Yes — a new deck needs a permit nearly everywhere, Salt Lake City included. In Utah, decks follow the Utah State Construction Code (2021 IRC with Utah amendments, Title 15A). The prices on this page carry $360–$1,100 for plans, permit and layout.
Does the price include sales tax in Utah?
No. The prices here are before tax; Utah's base state rate is 6.1%, plus any local rate.
What decking do people choose in Utah?
Most used on decks in the Mountain states: capped composite, then treated hem-fir or fir 2x6, then cedar.
Other home projects in Salt Lake City
Deck building cost in Utah
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 Salt Lake City's construction cost index of 0.98.
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 Salt Lake City, each on its own base: RSMeans residential 0.91, HUD 0.92, Craftsman 1.02. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Salt Lake City 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