Typical price ranges
Most Salt Lake City homeowners pay between $15 and $35 per square foot for a new pressure-treated lumber deck, installed. A straightforward 300-square-foot ground-level deck typically lands between $6,000 and $12,000 all-in. Step up to composite decking — Trex, TimberTech, or Fiberon are common here — and expect $25–$50 per square foot, putting that same 300-square-foot project at $9,000–$18,000 before extras.
Multi-level decks, rooftop decks on newer Sugarhouse or Millcreek infill homes, or anything requiring substantial footings in the Wasatch Front's rocky or clay-heavy soil can push past $60 per square foot. Pergolas and shade structures tacked onto an existing deck typically add $3,000–$8,000 depending on materials.
Demolition of an existing deck runs $500–$2,500 depending on size and whether the lumber needs to be hauled and sorted for disposal under Salt Lake County waste guidelines.
What drives cost up or down in Salt Lake City
Frost depth. Salt Lake City's frost line sits around 30 inches. Every footing has to go below that, which means more concrete and more labor than you'd find in a warmer climate. On sloped lots — common in the avenues, Emigration Canyon access neighborhoods, and east-bench areas — footings get expensive fast.
Material choices in a semi-arid climate. UV exposure in the Salt Lake valley is intense at 4,300 feet elevation. Untreated or low-grade wood degrades faster here than in coastal markets. Most experienced local builders now push composite or hardwood (ipe, cumaru) specifically because of the UV and the freeze-thaw cycling that cracks and warps standard pine. Those materials cost more upfront but hold up better between the summer heat and January cold snaps.
Permit costs and inspections. Salt Lake City requires a building permit for decks over 200 square feet or more than 30 inches off grade. The permit fee typically runs $150–$400 depending on project valuation, and you'll need an inspection before the decking boards go down to verify footings. Factor in two to four weeks for permit processing if you're building in peak season (April–June). Unincorporated Salt Lake County and cities like Murray, Sandy, or Draper have their own permit offices with slightly different thresholds — confirm with your local building department before work starts.
Seasonal labor demand. Most decks are built May through October. Scheduling in late March or November can sometimes get you a better price; contractors have more availability and some will negotiate on labor to keep crews working.
How Salt Lake City compares to regional and national averages
Nationally, deck construction averages around $20–$45 per square foot for composite installs. Salt Lake City falls roughly in the middle of that band — less expensive than Denver (where labor markets are tighter) and slightly above Phoenix (lower frost requirements, simpler footings). Compared to the Wasatch Front's own submarkets, expect Park City and Summit County projects to run 20–30% higher due to elevation complications, stricter HOA requirements, and a thinner contractor pool.
Lumber prices at regional suppliers track national commodity markets closely, so the gap between Salt Lake and national averages is driven mostly by labor rates and footing requirements rather than materials.
Insurance considerations for Utah
Utah doesn't license deck builders at the state level the way it licenses electricians or plumbers, which means you need to do more due diligence yourself. Before signing anything, ask for:
- General liability insurance (minimum $1 million per occurrence is a reasonable floor)
- Workers' compensation coverage — Utah requires it for contractors with employees, but sole proprietors can legally waive it
- A copy of their Utah Division of Occupational and Professional Licensing (DOPL) contractor registration
A deck that's built without a required permit can create real headaches at resale — title companies and buyers' inspectors will flag unpermitted structures. If a structure collapses and an unpermitted build is involved, your homeowner's insurance may have grounds to limit or deny a claim.
If you're adding a deck that extends living space or adds significant value, call your homeowner's insurance carrier before the project is done. You may need to increase your dwelling coverage limit.
How to get accurate quotes
Get at least three itemized bids. A credible quote should break out materials (species, grade, brand of composite if applicable), hardware and fasteners, footing and concrete work, permit fees, and labor separately. Lump-sum bids make it impossible to compare contractors fairly.
Ask specifically:
- What wood species or composite line are you pricing?
- Are permit fees included?
- Who pulls the permit — you or me? (It should be the contractor.)
- What's the warranty on labor, and what's the manufacturer warranty on the decking material?
The 26 deck builders listed in this directory carry an average rating of 4.9/5, but ratings alone aren't a substitute for checking DOPL registration, verifying insurance certificates directly, and walking through a comparable local project they've completed.