Most people hear "custom" and think "expensive." That's not really what the word does here. What it means is a process that starts somewhere different than a stock build.
Most decks going in across Salt Lake County right now are some version of a contractor's three or four favorite layouts, dropped onto a back yard with the dimensions adjusted. They look fine. They function fine. They're also rarely the best deck the property can actually hold.
A real custom deck starts with the lot, with its grade, its sun, what's already growing there, how the house actually opens onto it. It starts with the way you use your back yard now, and the way you'd use it if the layout wasn't fighting you. The deck then gets designed around those answers, not the other way around.
If you've been on the East Bench, you've seen what happens when this part gets skipped. Homes in The Avenues, Federal Heights, and Yalecrest sit on hillsides that drop ten or fifteen feet from front to back. A flat rectangle snapped onto the back of one of those houses leaves usable square footage marooned five steps up from the rest of the yard. The fix is almost always a stepped or tiered design that relates to the grade, but you can't get there from a catalog.
Why custom design matters more in Utah than in most places
Two things make the design phase higher-stakes here than in flatter, milder parts of the country.
First, the grade. Older Salt Lake neighborhoods were built on the bench, the visible terrace at the foot of the Wasatch foothills where the ancient Lake Bonneville shoreline used to sit. Homes that look modest from the curb often have aggressive drop-off in the back yard. That's a design opportunity if you take it seriously, and a design failure if you don't. Multi-level decks, walkout platforms tying second-story doors to grade-level entertainment areas, and structurally engineered piers driven below the frost line are not exotic features in this market. They're a baseline competence.
Second, the climate. The Wasatch Front has one of the harsher freeze-thaw cycles of any U.S. metro outside the mountain west proper. Temperatures swing thirty or forty degrees in a single day during shoulder seasons. UV at this elevation is intense for half the year. Snow load matters, even after the unusual 2025–26 winter, where statewide snowpack hit a record low and Salt Lake City logged its warmest winter in more than 150 years. Most years the load is real, and undersized framing will tell on you eventually. A deck designed for a 30-pound snow load somewhere in Florida is not a deck designed for the East Bench.
That second factor is why a lot of homeowners we work with come in convinced they want pressure-treated wood and leave with a different material choice. There's usually a few reasons, but the central one is the math on annual maintenance over a 25-year deck lifespan in this climate. We won't talk you out of wood if you genuinely want wood. We will be honest that the trade-offs aren't what they were in the catalog.
What a custom deck build actually looks like
Every project starts with a site visit, not a phone quote. We'd rather walk your lot then guess at it from a photo. The visit covers the grade and any drainage running through the proposed deck footprint, how the existing doors and windows open onto the space, the sun and shade pattern across the back yard at different times of day, what you actually use the back yard for now versus what you wish you used it for, the setbacks and easements and any HOA requirements specific to your neighborhood, and whether the design is going to need a pergola or patio cover or some other shade element to be usable in July.
From there, the design phase produces a real plan. Not a rendering with stock furniture pasted in, but a buildable set of drawings with dimensions, footing locations, framing layout, and a material spec. You make decisions before anything gets ordered or cut. Changes at this stage cost nothing. Changes after framing starts cost a lot.
The build itself is structured around three checkpoints: footings and frame inspection, decking and railing rough-in, then final walkthrough. The crew working your project is the same crew start to finish, not a rotating cast of subcontractors who've never seen the design.
A take you may not want to hear
Don't copy your neighbor's deck.
This is the single most common mistake we see on the East Bench. Someone two doors down built a beautiful multi-level deck with a covered seating area, and now you want the same thing. The problem is that your lot doesn't have the same sun, the same grade, the same sightline to the foothills, or the same back-door configuration. The deck that's perfect at their house is dramatically less perfect at yours.
What you actually want is the thinking that produced their deck. The design conversation that started with their lot and ended with that specific solution. Applied to your lot, the same thinking produces something different, and that different thing is what your back yard actually wants. Hillside lots in particular are not interchangeable. A design that works in lower Federal Heights will sometimes not work in upper Avenues. The grade flips, the snow load changes, the prevailing wind shifts.
We've turned down projects where a homeowner insisted on a copy of something we'd built down the street. It's not personal. It's that we couldn't produce the result they wanted on their specific lot, and didn't want to be paid for a build we knew was going to disappoint.
Frequently asked questions
How much does a custom deck in Salt Lake City cost?
For a custom build with quality framing and mid-grade composite decking, expect $35 to $65 per square foot installed, depending on access, height off grade, railing choice, and complexity. A 400-square-foot ground-level rectangular deck might run $14,000 to $20,000. A 600-square-foot multi-level deck with a covered seating area on a hillside lot can run $40,000 to $80,000. Wood comes in lower on day one and higher across a 25-year ownership window once you account for stripping and resealing every few years.
How long does the design and build process take?
Design typically takes two to four weeks from the first site visit to a buildable set of drawings. Permitting in Salt Lake City takes another two to four weeks depending on the workload at Building Services. Construction itself runs three to six weeks for most custom decks, and longer for multi-level builds or complex structural work. From your first call to a final walkthrough, plan on ten to fourteen weeks.
Do I need a building permit for a custom deck in Salt Lake City?
Yes, almost always. Salt Lake City Building Services requires a permit for any deck more than 30 inches off grade, attached to the house, or larger than 200 square feet. Most custom builds clear at least one of those thresholds. Permitting protects you when you sell, and it's what makes the deck legal to use day to day. Permit application is handled as part of the design phase.
What materials hold up best in Utah's climate?
For most homeowners on the Wasatch Front, composite decking from Trex, TimberTech, or Azek wins the lifetime-cost comparison. It resists UV fade better than wood does at this elevation, doesn't crack from freeze-thaw, and requires no annual sealing. Wood (cedar, redwood, pressure-treated pine) costs less up front and gives a different aesthetic that some homeowners genuinely prefer. Both options get spec'd during design, with full pricing in front of you, so you make the call.
Are you licensed and insured?
Yes. We're a licensed and insured custom deck builder serving Salt Lake County. General liability and worker's comp coverage are in place on every project, and we provide certificates of insurance on request before work begins.
Tell us about your lot
The first conversation is the most important one. Send a few photos of your back yard, what's there now, and what you'd want there instead. We respond within one business day and schedule the site visit from there.
Call (801) 930-7243 or fill out the contact form.