Deck Cost in Fort Collins CO

A new deck in Fort Collins CO costs about $22 to $55 per square foot installed, and the Denver-market average is $9,640, with most decks between $5,055 and $14,243 (Angi, 2026). The tables below price common sizes, compare materials and list the add-ons, so a quote from Pineridge Deck Pros or anyone else can be checked line by line.

Deck cost in Fort Collins CO by size

Square footage drives most of a deck's price, and the Denver-market range of $22 to $55 per square foot covers everything from a low pressure-treated platform to a composite deck with aluminum railing. Fort Collins belongs to the Denver TV market, so these are Angi's Denver figures.

New deck cost by size at $22 to $55 per sq ft installed

Deck size	Square feet	Typical installed cost
10 x 10 ft	100	$2,200 to $5,500
12 x 12 ft	144	$3,168 to $7,920
12 x 16 ft	192	$4,224 to $10,560
14 x 20 ft	280	$6,160 to $15,400
16 x 20 ft	320	$7,040 to $17,600
20 x 20 ft	400	$8,800 to $22,000

Rate: Angi, How Much Does It Cost to Build a Deck in Denver, CO? (2026). Stairs, railings and covers are inside the range on simple decks and on top of it on complex ones. Quotes vary by site.

Modernize's national figures land in the same place: $3,000 to $6,000 for a 10 by 10, $5,500 to $10,000 for a 12 by 16, and $8,000 to $14,000 for a 16 by 20.

Light gray composite deck with black metal railings, an outdoor table and lounge chairs among tall trees — A light gray composite deck with black metal railings.

Deck cost by material

Decking material cost per sq ft (boards only)

Material	Per sq ft	Note
Pressure-treated pine	$3 to $6	Cheapest; checks and twists in dry air
Cedar or redwood	$4 to $9	Decay-resistant; seal every year or two
Composite	$6 to $13	Capped boards; no sealing
PVC or vinyl	$7 to $15	No wood content in cellular PVC
Exotic hardwood	$8 to $16+	Ipe and similar; dense and hard to work

Source: Modernize Deck Cost guide (updated August 12, 2026), material only. An installed composite deck runs $25 to $54 per sq ft nationally (Angi, 2026).

Material is a smaller share than people expect. Swapping cedar for composite on a 192 square foot deck adds about $400 to $800 in boards at those rates, before the frame and labor, which barely change. The composite vs wood guide covers upkeep, sun and snow, and the composite deck installation and cedar deck pages price each build.

Add-ons that move the price

Common deck add-ons (2026)

Add-on	Cost	Source
Wood railing	$15 to $50 per linear ft	Angi railing installation, national
Composite or Trex railing	$15 to $60 per linear ft	Angi railing installation, national
Aluminum railing	$40 to $70 per linear ft	Angi railing replacement, national
Cable railing, stainless	$150 to $285 per linear ft	HomeGuide
Pergola or cover on the deck	$2,000 to $6,000+	Modernize
Built-in lighting	$500 to $2,500	Modernize
Fort Collins deck permit	$110 plus tax	City of Fort Collins

Railing and cover prices vary widely by style. In Fort Collins a cover bearing on a deck also needs engineered plans.

Height

A deck 10 feet off the yard needs taller posts, bracing, guards on every side and a long stair, so a second story deck sits near the top of the range. A freestanding deck no more than 30 inches high and 200 square feet, not serving the front door (the required exit), can skip the City permit.

Tear-off

Removing an old deck adds labor and disposal. A deck replacement runs $7,900 to $12,500 or more nationally (Angi), against $746 to $3,060 for a typical deck repair in the Denver market.

Wood deck with a table, chairs and a grill, new townhouses beyond — A wood deck set up for grilling and dinner outside.

Worked example

Pricing a 14 by 20 deck three ways

The same 280 square foot deck, attached to the house along its 20 foot side and 3 feet off the yard, priced three ways. The frame, footings and permit are close to the same in all three; the boards, railing and finish make the difference.

Plans and the $110 permit are the same for each, covered in the Fort Collins deck permit guide.

Pressure-treated, low and simple, at $22 to $30 per sq ft	$6,160 to $8,400
Cedar boards and cedar railing, mid range, at $30 to $40	$8,400 to $11,200
Composite, installed, at $25 to $54 (Angi national)	$7,000 to $15,120
Plus 44 ft of composite railing (two 14 ft sides and the 20 ft front, less a 4 ft stair opening) at $15 to $60 per ft, composite option	$660 to $2,640

A worked example, not a quote. Rates: Angi 2026 Denver deck guide and national composite deck and railing installation figures; the wood rows split the Denver range.

Deck Cost in Fort Collins: Questions

Close view of brown composite deck boards with a wood-grain texture and long shadows

Wood-grain texture on capped composite boards.

What is the average cost of a deck in Colorado?

In the Denver market, which takes in Fort Collins and the rest of Northern Colorado, a new deck averages $9,640, and most fall between $5,055 and $14,243 (Angi, 2026). That works out to about $22 to $55 per square foot installed.

How much would a 14x20 deck cost?

A 14 by 20 deck is 280 square feet: about $6,160 to $15,400 at $22 to $55 per square foot. As an installed composite deck, at Angi's national $25 to $54 range, the same deck is about $7,000 to $15,120.

How much would a 20x20 deck cost?

400 square feet at $22 to $55 per square foot is about $8,800 to $22,000. Angi's national figure for replacing a 20 by 20 deck is $10,000 to $11,000.

How much should a 12x20 deck cost?

A 12 by 20 deck is 240 square feet, so at the Denver-market rate of $22 to $55 per square foot installed (Angi, 2026) it comes to about $5,280 to $13,200. As an installed composite deck at Angi's national $25 to $54 a foot, the same deck runs about $6,000 to $12,960.

What's a fair price per sq ft for a 30x30 wood deck in Colorado?

Wood decks sit in the lower part of the Denver market's $22 to $55 per square foot installed range (Angi, 2026), and Modernize's national figure for professional installation is $15 to $35 a foot. At 900 square feet, a 30 by 30 wood deck at about $22 to $35 a foot comes to roughly $19,800 to $31,500. Stairs, the ledger and the permit are spread over more area on a big deck, so it usually lands lower per foot than a small one; height and long railing runs push it back up.

How much is a 12x12 deck?

144 square feet at the Denver-market rate comes to roughly $3,168 to $7,920. Small decks cost more per square foot than big ones because stairs, a ledger and a permit cost about the same whatever the size.

What is the most expensive part of building a deck?

Labor and structure. Modernize puts labor at 50 to 60 percent of the total, and much of it goes into footings, posts, beams and joists. After that, decking material and railing are the biggest line items; composite boards cost $6 to $13 per square foot against $3 to $6 for pressure-treated (material only).

Does a deck permit add much in Fort Collins?

Not much: $110 plus sales tax ($38.50 plan check and $71.50 permit) for a deck that is attached, over 30 inches high, over 200 square feet, or serving the front door. Engineering, when the City requires it for a hot tub or a stacked deck, costs more than the permit.

Deck Cost in Fort Collins CO