Short answer: most new decks along the Wasatch Front cost about $25–$45 per square foot in pressure-treated wood and $40–$70 per square foot in composite, installed.
Example: a 16 x 20 ft (320 sq ft) deck
| Pressure-treated wood | Composite (Trex / TimberTech class) | |
|---|---|---|
| Installed cost | $8,000 – $14,400 | $12,800 – $22,400 |
| Yearly upkeep | Wash and re-stain every 1–3 years | Wash once or twice a year |
| Typical life in Utah | 10–20 years | 25+ years |
Material Prices: Builder vs Retail
| Item | Builder price | Standard BPR price (from) | Typical Utah retail |
|---|---|---|---|
| Composite decking, premium line (per sq ft, material) | $7 – $10 | $11 | $11 – $16 |
| Composite railing (per linear ft, material) | $45 – $75 | $80 | $80 – $130 |
Material only. Framing, footings, stairs, labor and permits are quoted separately.
What Changes the Price
- Height: second-story decks need taller posts, bracing and more labor.
- Stairs and railings: railing is priced by the linear foot and adds up fast.
- Footings and soil: sloped lots and rocky soil cost more to dig.
- Removing an old deck: demolition and disposal.
- Extras: pergolas, built-in benches, lighting and covers.
- Permits: most attached or raised decks need one.
Why Utah Favors Composite
High-altitude sun fades and dries wood quickly, and freeze-thaw cycles open up cracks and loosen fasteners. That’s why many Utah homeowners re-stain wood decks every year or two. Composite costs more on day one, but skipping years of staining often makes it the cheaper deck over its life. Thinking about your old deck? Read repair or replace first.
See our deck building page, or ask about builder price on decking through the Winter Model Home Program.
Deck Cost FAQ
How much does a deck cost in Utah?
Most new decks along the Wasatch Front run about $25 to $45 per square foot in pressure-treated wood and about $40 to $70 per square foot in composite, installed. Height, stairs, railings and permits move the price most.
Is composite decking worth it in Utah?
For most homeowners, yes. Utah’s strong sun and freeze-thaw cycles crack and gray wood quickly. Composite costs more up front but needs no staining, so it often costs less over 15 to 20 years.
Do I need a permit for a deck in Utah?
Most decks that are attached to the house, more than 30 inches above the ground, or over 200 square feet need a building permit. Check with your city; your contractor should pull it.