Do I need a permit to build a deck in Lehi or Utah County?

Usually yes. Attached decks more than 30 inches above grade are the most common permit trigger in Utah County, and Lehi issues its own permits. Deck permits generally run $150 to $500, and many subdivisions also require HOA architectural approval before you build.

What makes a Utah County deck cost more to build correctly?

Footings must extend below the roughly 30-inch frost line to prevent freeze-thaw heave, Wasatch Front snow loads of 40+ psf require larger beams and more posts, and high-altitude UV is hard on wood finishes. Building for these conditions costs more but prevents early failure.

What does a typical Rooval deck project cost?

Most custom decks Rooval Deck & Beam Builders builds in Utah County land between $18,000 and $35,000 all-in. That covers composite or premium wood decking, railings, stairs, permits, and engineered footings. Smaller basic decks cost less — see the per-square-foot table in this guide.

How Much Does a Deck Cost in Utah County? (2026 Price Guide)

Q: How much does a deck cost in Utah County?

Most Utah County homeowners spend $25 to $90 per square foot installed in 2026. That is roughly $4,500-$8,500 for a basic 12x12 pressure-treated deck and $11,000-$22,000 for a mid-size 12x20 composite deck. Multi-level or second-story composite decks commonly run $19,000-$37,000.

Q: Is composite decking worth it in Utah?

For most homeowners, yes. Composite costs more up front but requires no staining, resists Utah's intense UV and freeze-thaw cycles, and lasts 25 to 30 or more years, versus the every-2-to-3-year seal cycles that wood decks need in our dry climate.

Q: How long does it take to build a deck?

A standard single-level deck usually takes about 1 to 2 weeks of build time once permits and any HOA approval are in hand. Multi-level and second-story projects take longer due to added framing and footings.

Q: How much does a pergola cost in Utah?

Basic pergolas commonly run $4,000 to $12,000 or more installed in Utah, depending on size and material. Faux or box beams run about $15 to $35 per linear foot installed, real or reclaimed wood beams $30 to $60+ per linear foot, and structural beams are quoted after engineering.

Most Utah County homeowners spend between $25 and $90 per square foot installed for a new deck in 2026. That works out to roughly $4,500–$8,500 for a basic 12×12 pressure-treated deck and $11,000–$22,000 for a mid-size 12×20 composite deck. A larger multi-level or second-story composite deck (around 14×20 with stairs and railing) commonly runs $19,000–$37,000. The two biggest cost drivers along the Wasatch Front are the decking material you choose and the deck’s height off the ground.

Real numbers from our books: most of the custom decks Rooval builds in Utah County land between $18,000 and $35,000 all-in. That reflects what our customers actually order — composite or premium-wood builds with railings, stairs, permits, and footings engineered for Utah’s frost depth — not a bare-bones 12×12 kit.

Licensed & insured Utah builders • Built by the Rooval family of companies • 5-Year Workmanship Warranty in writing

How much does a deck cost per square foot in Utah?

Price per square foot is the fairest way to compare bids because it already blends framing, footings, fasteners, and labor. Here are realistic 2026 installed ranges for the Lehi and greater Utah County market. Wood species like cedar and redwood sit in the middle; composite (Trex/TimberTech-style) costs more up front but skips the every-2-to-3-year staining that Utah’s dry, high-UV summers demand of real wood.

Material	Installed cost / sq ft	Lifespan in Utah climate	Upkeep
Pressure-treated pine	$25–$40	12–18 yrs	Seal/stain every 2–3 yrs
Western red cedar	$35–$55	15–20 yrs	Seal every 2–3 yrs
Redwood	$40–$60	18–25 yrs	Seal every 2–3 yrs
Composite (Trex / TimberTech-style)	$45–$90	25–30+ yrs	Occasional wash; no staining

Pressure-treated is roughly 35–45% cheaper up front than composite, but that gap narrows within about a decade once you add stain cycles and board replacement. Under our intense altitude UV and freeze-thaw swings, wood decks often need meaningful repair around the 12–15 year mark, while quality composite holds its finish far longer. For a deeper look at materials and builds, see our custom deck builder page.

Wooden deck with Adirondack chairs and a dark horizontal-rail fence overlooking forested mountains under low clouds

What does a deck cost by size?

These totals assume a standard ground-level or single-step deck with basic railing. Add height, stairs, or a second story and the number climbs (see below).

Deck size	Sq ft	Pressure-treated	Cedar	Composite
12 x 12	144	$4,500–$5,800	$5,000–$7,900	$6,500–$13,000
12 x 20	240	$6,000–$9,600	$8,400–$13,200	$11,000–$21,600
14 x 20	280	$7,000–$11,200	$9,800–$15,400	$13,000–$25,000
Multi-level / second-story	varies	—	—	$19,000–$37,000+

What drives deck cost up?

Height and second stories. An elevated or second-story deck typically costs 25%–70% more than a ground-level one because of taller posts, deeper footings, and the extra bracing needed to suspend the structure safely.
Railings. Standard composite or aluminum picket railing runs about $55–$95 per linear foot installed. Cable, glass-panel, or horizontal aluminum systems run $140–$240 per linear foot.
Stairs. Budget roughly $100–$500 per step depending on width and material. A tall deck needing a long stair run adds up fast.
Footings for frost depth. Utah County requires footings below the ~30-inch frost line, so each pier is dug deep and poured with more concrete than a warmer climate would need.
Permits and engineering. Deck permits in Lehi and Utah County generally run $150–$500. Complex or heavily loaded designs may need stamped engineering, an added cost.

What do wood beams and pergolas cost?

Decks are only part of what we build. If your project includes interior beams or an outdoor structure, here are honest 2026 ranges for Utah County:

Faux / decorative box beams: roughly $15–$35 per linear foot installed. These are hollow wood beams that mount to your ceiling — no engineering or permit required, and most rooms are done in a day or two.
Real and reclaimed wood beams: $30–$60+ per linear foot installed, depending on species, size, and finish. Reclaimed timber with character sits at the top of that range.
Structural beams: quoted after engineering. Anything that carries load needs a stamped engineer’s design and a permit, so we price these only after the engineering is done — anyone quoting a structural beam sight-unseen is guessing.
Pergolas: basic pergolas commonly run $4,000–$12,000+ installed in Utah depending on size and material (cedar vs. larger timber-frame or attached designs). Louvered, oversized, or heavily customized structures go higher.

Details and photos on our interior wood beams page and our pergolas & outdoor structures page.

Spacious modern composite deck with gray grooved boards, wicker lounge furniture, and a glass railing overlooking a lake on a sunny day

Why do Utah County decks cost more to build correctly?

Our climate is the reason a properly built deck here isn’t the cheapest option. Three Wasatch Front factors matter:

Frost depth (~30 inches). Footings must extend below the frost line so freeze-thaw heave doesn’t lift and rack your deck over the winters.
Snow load (40+ psf along the Wasatch Front). Ground snow loads here run around 40 pounds per square foot or higher, well above southern Utah’s ~20 psf. That dictates larger beams, closer joist spacing, and more posts.
Altitude UV and dry summers. Intense high-elevation sunlight and low humidity are hard on wood finishes, which is why many homeowners upgrade to composite for the long haul.

Skipping any of these to shave the price is how decks fail early. We’d rather quote it honestly the first time.

Do I need a permit and HOA approval?

Usually, yes. Attached decks more than 30 inches above grade are the most common permit trigger in Utah County, and Lehi issues its own permits through the city portal. Plans generally show framing, beam and joist sizing for local snow load, footing details, and ledger flashing. Many Utah County subdivisions (Traverse Mountain, Saratoga Springs, Eagle Mountain, and others) also require HOA architectural approval before you build, so budget a couple of weeks for sign-off. We handle permitting as part of our builds.

Want a firm number for your yard?

Rooval Deck & Beam Builders offers free, no-pressure estimates across Lehi and Utah County. Call (801) 671-4062 and we’ll walk your space, talk materials, and give you an honest range. See our work in Lehi and American Fork, or explore our custom decks, interior wood beams, and pergolas & outdoor structures.

What happens next?

1Call or send the formTell us what you’re picturing — deck, beams, pergola, or all three.

2Free on-site measurement & design consultWe walk your space, measure, and talk materials and options honestly.

3Written quote within 48 hoursA clear, itemized number — no pressure, no games.

Frequently asked questions

Is composite decking worth it in Utah? For most homeowners, yes. The higher up-front cost is offset by no staining, strong UV and freeze-thaw resistance, and a 25–30+ year lifespan, versus the ongoing seal cycles wood needs in our dry climate.

How long does it take to build a deck? A standard single-level deck usually takes about 1–2 weeks of build time once permits and any HOA approval are in hand. Multi-level and second-story projects take longer.

How much does a pergola cost in Utah? Basic pergolas commonly run $4,000–$12,000+ installed depending on size and material. Larger timber-frame, attached, or heavily customized designs go higher — see our pergolas & outdoor structures page for details.

Can you match a deck to my house or add beams inside? Yes. Beyond decks and pergolas, we also install interior wood beams, mantels, and timber accents, and our sister company Rooval Roofing handles roofing if your outdoor project ties into a covered patio.

Which cities do you serve? We build throughout north Utah County and the south valley, including Saratoga Springs, Draper, Orem, Provo, and Highland.

Ready for your honest number?

Send us the basics and we’ll get back to you fast — or call (801) 671-4062.