Deck Building Cost in Denver (2026)

A deck is one of the more predictable projects to price, as long as you know what drives the number. Here's what Denver-area homeowners should expect in 2026.

The baseline

HomeGuide's deck cost guide (updated February 10, 2026) puts a new deck at $25 to $50 per square foot installed, depending on material and type. Replacing an existing deck runs $30 to $55 per square foot, because the old one has to come off first. Labor alone is $11 to $22 per square foot.

By size

HomeGuide's size table, for pressure-treated pine decks attached to a one-story home:

Pressure-treated pine is the lowest-cost material. Composite, cedar and hardwoods cost more; see composite vs. wood decking.

What raises the price on the Front Range

Height. A second-story deck off a walkout needs taller posts, bigger footings, more bracing and longer stairs. Walkout lots are common in hilly suburbs like Parker and Castle Rock.

Footings. Footings must extend below the local frost depth, which your building department sets. Rocky or expansive soil can make digging slower.

Stairs and railings. Railings and stairs are priced separately and add up quickly, especially with metal or glass railings.

Covered decks. Adding a roof or pergola adds structure and, in Denver, triggers both zoning and building review.

Wildfire codes. In wildfire-mapped areas of Jefferson and Douglas counties, wildfire resiliency codes that took effect July 1, 2026 can affect deck materials and how you treat the area under and around the deck. Mountain decks in places like Evergreen may need noncombustible or ignition-resistant materials, which cost more.

Demolition and disposal. Replacing an old deck means tear-out and haul-away. HomeGuide's replacement range accounts for this.

Permits and HOA review

Permit rules vary across the metro. In Denver, decks 12 inches or less above grade don't need a permit; decks above 12 inches need zoning review; decks 30 inches or more above grade need a building permit. Parker requires permits for all decks regardless of height or size. Fees vary by valuation.

HOAs add another layer. The Highlands Ranch Community Association, for example, says all exterior home improvements require approval. Budget time for HOA review before construction.

A sample budget

A 16-by-16-foot pressure-treated deck at ground-floor height would fall around $6,400 to $12,800 based on HomeGuide's table. Switching to composite, adding a stair run and upgrading to metal railings might push that well past the top of the range. A second-story walkout deck of the same size will cost more again because of the structure. Use these as starting points for comparing bids.

When to build

Spring and early summer are the busiest months for Front Range deck builders, so lead times are longer and schedules fill quickly. Booking design and permits in winter can put you near the front of the line when the ground thaws. Fall is often a good time to build, too, with milder weather and contractors finishing their summer backlogs. Concrete footings need temperatures above freezing to cure properly, so ask how your builder handles cold snaps if work runs late in the year.

Maintenance costs over time

Price isn't just installation. Wood decks in Colorado's dry air and strong sun usually need cleaning and resealing or restaining every few years, and boards can check, split or cup. Composite costs more up front but generally needs only cleaning. If you plan to stay ten years or longer, include a few rounds of staining in the wood estimate when you compare.

Comparing deck bids

1. Confirm material brand and line for decking, framing and railings.
2. Ask for footing size and depth and post size.
3. Ask how the ledger is attached and flashed to the house.
4. Check that stairs, railings, lighting and demolition are included or priced separately.
5. Confirm who pulls the permit and handles HOA submittals.
6. Ask about the warranty on workmanship and materials.

More in our decks guide.