How Much Does It Cost to Build a Deck in Colorado?

~Everything Homeowners Need to Know~

Building a deck is one of the best ways to increase usable living space and enjoy Colorado’s incredible outdoor seasons. Whether you want a quiet place to drink coffee in the morning or a gathering spot for family and friends, a well-built deck can dramatically improve both the value and functionality of your home.

But one of the first questions homeowners ask is:

“How much does it cost to build a deck in Colorado?”

The answer depends on several factors including materials, size, design complexity, and whether you add features like pergolas, railings, stairs, or built-in seating.

In this guide we’ll walk through realistic deck cost ranges, the most common deck materials, pergola options, maintenance expectations, and how long each type lasts so you can make the best decision for your home.

Average Cost to Build a Deck in Colorado

Deck prices can vary widely depending on materials and design.

Typical deck costs in Colorado:

• Pressure Treated Wood Deck: $35 – $60 per sq ft

• Cedar or Redwood Deck: $50 – $80 per sq ft

• Composite Deck (Trex, TimberTech, etc): $65 – $110 per sq ft

• PVC Decking: $80 – $130+ per sq ft

Example project sizes:

Deck Size	Estimated Cost
12x12 Deck	$5,000 – $12,000
12x20 Deck	$9,000 – $20,000
16x20 Deck	$14,000 – $30,000
Large custom deck	$30,000 – $75,000+

These estimates include materials, framing, labor, and standard railings, but custom features can increase the investment.

Factors That Affect Deck Cost

Several things influence the final cost of a deck project.

Deck Size

Larger decks require more framing, decking boards, and labor.

Height of Deck

Raised decks require:

• deeper footings

• structural posts

• stair systems

• additional bracing

Permits & Engineering

Colorado municipalities often require:

• building permits

• inspections

• structural engineering for large decks

Railings

Railings can significantly affect cost:

• wood railings (least expensive)

• cable railings

• aluminum railings

• glass rail systems

Custom Features

Additional upgrades may include:

• pergolas

• built-in seating

• outdoor kitchens

• deck lighting

• privacy screens

Types of Deck Materials (Longevity, Cost & Maintenance)

Choosing the right decking material is one of the biggest decisions homeowners make.

The most common deck materials used in Colorado:

1. Pressure Treated Wood Decks

~This option is popular for homeowners wanting a functional deck at the lowest upfront cost~

Average Cost: $35 – $60 per sq ft

Lifespan: 10 – 20 years with proper maintenance

Maintenance:

(Requires the most maintenance of any decking option)

• staining every 2–3 years

• sealing to prevent moisture damage

• occasional board replacement

Pros

• most affordable option

• widely available materials

• easy to repair individual boards

Cons

• can warp or crack

• splinters over time

• requires ongoing maintenance

2. Cedar Decks

~Composite decks are one of the most popular choices for modern homeowners because they combine durability with low maintenance~

~Cedar is a natural wood that resists rot better than standard lumber~

~Popular for rustic homes, mountain homes, and natural landscapes~

Average Cost: $50 – $80 per sq ft

Lifespan: 15 – 25 years

Maintenance:

• sealing every 2–3 years

• occasional sanding and refinishing

Pros

• beautiful natural wood grain

• naturally resistant to insects

• cooler surface in hot sun

Cons

• more expensive than pressure treated

• still requires regular sealing

3. Composite Decks

~Composite decking is made from recycled wood fibers and plastic materials.~

~Common brands include: Trex, TimberTech, Fiberon~

Average Cost: $65 – $110 per sq ft

Lifespan:25 – 50 years

Maintenance:

(Very low maintenance)

• occasional washing

• no staining or sealing

Pros

• extremely durable

• resists rot and insects

• consistent color options

• low maintenance

Cons

• higher initial cost

• can get warmer in direct sun

4. PVC Decking

PVC decking is a fully synthetic material designed for maximum durability

PVC is often used in high-end custom homes or waterfront environments

Average Cost: $80 – $130+ per sq ft

Lifespan: 30 – 50 years

Maintenance:

(Minimal maintenance required)

• occasional washing/sweeping

• no staining or sealing

Pros

• extremely resistant to moisture

• lightweight material

• resists stains and fading

Cons

• higher cost

• less natural appearance

Pergolas: Cost, Benefits, and Styles

Adding a pergola to your deck creates shade and architectural interest while making the space feel more like an outdoor living room.

Traditional Wood Pergolas	Average Pergola Cost in Colorado:
Wood	$3,500 – $12,000
Cedar	$6,000 – $18,000
Aluminum	$15,000 – $40,000+

Wood Pergola

Average Cost: $3,500 – $12,000

Lifespan: 15 – 25 years

Pros

• natural look

• customizable size

• affordable

Cons

• requires sealing or staining

Cedar Pergola

Cedar is naturally resistant to rot and insects.

Average Cost: $6,000 – $18,000

Lifespan: 20 – 30 years.

Pros

• beautiful wood grain

• long lifespan

• great for Colorado climates

Cons

• higher upfront cost

Aluminum Pergolas

Modern option gaining popularity

Average Cost: $15,000 – $40,000+

Lifespan: 30+ years.

Pros

• extremely durable

• zero maintenance

• powder-coated finishes

Cons

• less natural appearance

Deck Features That Increase Value

Many homeowners add upgrades to turn their deck into a complete outdoor living space

Popular features:

• built-in benches

• fire pits

• outdoor kitchens

• integrated lighting

• privacy walls

• covered pergolas

• cable railing systems

These upgrades improve both usability and resale value

Outdoor living spaces are one of the most desired features for homebuyers, especially in Colorado where residents enjoy spending time outside.

A well-built deck can:

• increase property appeal

• improve usable square footage

• create a strong return on investment

Many homeowners recoup 60–75% of the deck cost in home value.

When Should You Replace a Deck?\

If your deck is 20+ years old, it may be time to consider rebuilding with newer materials.

• rotting structural beams

• loose or unstable railings

• soft or splintering boards

• sagging deck framing

• rusted hardware connections

Colorado’s climate presents unique challenges for decks:

• intense UV exposure

• snow loads

• freeze-thaw cycles

• dry climate cracking

Because of this, proper footings, framing, and materials are essential for long-lasting construction.

If you’re considering building or replacing a deck, working with an experienced builder ensures the structure is safe, code-compliant, and designed to last in Colorado’s climate.

At Bear Roots Builders of Colorado, we design and build decks that combine durability, craftsmanship, and outdoor living comfort.

Whether you're looking for a simple backyard deck or a custom outdoor retreat with pergolas and seating, our team focuses on creating spaces families can enjoy for decades.

Thinking About Building a Deck?

If you're planning a new deck or pergola project, consulting with a professional builder can help you explore design options and determine the best materials for your home and budget.

Contact Bear Roots Builders of Colorado to discuss your project and bring your outdoor space to life.

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