How much does a room addition cost in Denver, CO?

The average room addition in Denver, CO costs $110,385 in 2026. Costs range from $42,928 for a basic project to $245,300 for a high-end renovation. Denver is 23% more expensive than the national average of $90,000.

What is the labor rate for contractors in Denver?

The average contractor labor rate in Denver, CO is $38.49/hour, compared to the national average of $30/hour. For a room addition, labor typically accounts for 50% of the total cost, which is approximately $55,193 in Denver.

Are materials more expensive in Denver?

Denver has a material cost index of 117 (national average = 100). Materials cost about 17% more than the national average. For a room addition, materials account for 50% of the cost, approximately $55,193.

Do I need a permit for a room addition in Denver?

Yes, a room addition typically requires building permits in Denver, CO. The average permit cost in Denver is $2,288. Always confirm requirements with the Denver building department before starting work.

Is a room addition a good investment in Denver?

A room addition provides an estimated 55% ROI nationally. In Denver, where the median home price is $482,996, this project costs about 22.9% of your home value. This is a significant investment relative to home value — consider carefully whether the local market supports premium renovations.

Room Addition in Denver, CO — Costs $42,928 to $245,300

What does room addition cost in Denver? Average $110,385, ranging $42,928–$245,300. Labor runs $38.49/hr locally — 23% above the national average. Free breakdown with material + labor split.

Denver, CO Market

+23% vs national

Labor Rate

$38.49/hr

Material Index

117

Avg Permit Cost

$2,288

Median Home Price

$482,996

As one of the largest metros in Colorado, Denver has a competitive contractor market with hundreds of licensed professionals. This typically gives homeowners more leverage on pricing, though high demand for renovations can offset that advantage. At 23% above the national average, Denver is one of the more expensive markets for home improvement — driven primarily by above-average labor rates in the region. The median home in Denver is valued at $482,996, putting this project at about 22.9% of home value — a moderate investment with a projected 55% ROI.

Low Estimate

$42,928

National: $35,000

Mid-Range

$110,385

National: $90,000

High End

$245,300

National: $200,000

Per Sq Ft

$245

National: $200

Duration: 3-6 months

DIY: Hard

Permits: Required

ROI: 55%

Room Addition Cost Calculator for Denver

Adjusted for Denver's labor rate ($38.49/hr) and material costs (index 117).

Project Size: 200 sq ft

50 sq ft1,000 sq ft

Quality Level

Mid-grade materials, good quality fixtures, standard options.

Estimated Total in Denver

$110,385

Based on 200 sq ft at mid quality, adjusted for Denver market rates.

Local Cost Breakdown

Labor (50%)$55,193

At Denver's average rate of $38.49/hr (28% above national avg)

Materials (50%)$55,193

Material cost index 117 (17% above national baseline of 100)

Room Addition vs. Home Value in Denver

Metric	Denver	National Avg
Room Addition (Mid-Range)	$110,385	$90,000
Median Home Price	$482,996	$350,000
Project as % of Home Value	22.9%	25.7%
Estimated ROI	55%	55%
Median Household Income	$76,237	$75,000

What Affects the Price in Denver

1Local labor rates ($38.49/hr in Denver)
2Material cost index (117 vs national 100)
3Square footage
4Foundation type
5Number of stories
6Roof integration

Popular Upgrades

Cathedral ceiling
En-suite bathroom
Walk-in closet

Other Projects in Denver, CO

Second Story Addition

$245,300

HardROI 60%

Accessory Dwelling Unit (ADU) Construction

$183,975

HardROI 80%

Swimming Pool Installation

$78,988

HardROI 40%

Garage Addition

$67,458

HardROI 65%

Home Addition

$97,668

MediumROI 60%

Inground Swimming Pool

$78,621

HardROI 43%

Attic Conversion

$67,768

HardROI 64%

Swimming Pool Construction

$61,608

Professional OnlyROI 43%

Room Addition in Other Colorado Cities

Colorado Springs, CO

$96,105

-13%Pop. 478,961

Aurora, CO

$97,335

-12%Pop. 386,261

Fort Collins, CO

$91,965

-17%Pop. 169,810

Lakewood, CO

$104,745

-5%Pop. 155,984

Thornton, CO

$96,735

-12%Pop. 141,867

Arvada, CO

$111,735

+1%Pop. 124,402

Westminster, CO

$110,265

SamePop. 116,317

Pueblo, CO

$90,345

-18%Pop. 111,876

Planning a Room Addition in Denver

Building permits are typically required for a room addition in Denver. The average permit fee in this area is $2,288, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 3-6 months from start to finish.

A room addition is a complex project best left to licensed professionals. In Denver, skilled contractors charge an average of $38.49/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.

For the median Denver household earning $76,237/year, this project at $110,385 represents a significant investment. Consider financing options or phasing the work to spread costs over time.

Room Addition — National Guide

See the full national cost guide with DIY tips, cost factors, and ROI analysis.

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