How much does a half bath addition cost in Denver, CO?

The average half bath addition in Denver, CO costs $14,786 in 2026. Costs range from $6,161 for a basic project to $30,804 for a high-end renovation. Denver is 23% more expensive than the national average of $12,000.

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 half bath addition, labor typically accounts for 55% of the total cost, which is approximately $8,132 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 half bath addition, materials account for 45% of the cost, approximately $6,654.

Do I need a permit for a half bath addition in Denver?

Yes, a half bath 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 half bath addition a good investment in Denver?

A half bath addition provides an estimated 60% ROI nationally. In Denver, where the median home price is $482,996, this project costs about 3.1% of your home value. This is a small percentage of home value, making it a relatively low-risk improvement.

Half Bath Addition in Denver, CO — Costs $6,161 to $30,804

What does half bath addition cost in Denver? Average $14,786, ranging $6,161–$30,804. 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 3.1% of home value — a moderate investment with a projected 60% ROI.

Low Estimate

$6,161

National: $5,000

Mid-Range

$14,786

National: $12,000

High End

$30,804

National: $25,000

Per Sq Ft

$246

National: $200

Duration: 1-2 weeks

DIY: Hard

Permits: Required

ROI: 60%

Half Bath 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

$14,786

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

Local Cost Breakdown

Labor (55%)$8,132

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

Materials (45%)$6,654

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

Half Bath Addition vs. Home Value in Denver

Metric	Denver	National Avg
Half Bath Addition (Mid-Range)	$14,786	$12,000
Median Home Price	$482,996	$350,000
Project as % of Home Value	3.1%	3.4%
Estimated ROI	60%	60%
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)
3Plumbing distance
4Location in home
5Fixture quality
6Permits

Popular Upgrades

Vessel sink
Wallpaper accent
Floating vanity

Other Projects in Denver, CO

Bathroom Addition

$55,447

HardROI 58%

Kitchen Remodel

$51,038

HardROI 72%

Master Bathroom Remodel

$34,184

HardROI 65%

Bathroom Remodel

$21,975

MediumROI 68%

Second Story Addition

$245,300

HardROI 60%

Accessory Dwelling Unit (ADU) Construction

$183,975

HardROI 80%

Room Addition

$110,385

HardROI 55%

Home Addition

$97,668

MediumROI 60%

Half Bath Addition in Other Colorado Cities

Colorado Springs, CO

$12,835

-13%Pop. 478,961

Aurora, CO

$13,004

-12%Pop. 386,261

Fort Collins, CO

$12,276

-17%Pop. 169,810

Lakewood, CO

$14,019

-5%Pop. 155,984

Thornton, CO

$12,928

-13%Pop. 141,867

Arvada, CO

$15,116

+2%Pop. 124,402

Westminster, CO

$14,924

+1%Pop. 116,317

Pueblo, CO

$12,051

-18%Pop. 111,876

Planning a Half Bath Addition in Denver

Building permits are typically required for a half bath 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 1-2 weeks from start to finish.

A half bath 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 $14,786 represents a significant investment. Consider financing options or phasing the work to spread costs over time.

Half Bath Addition — National Guide

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

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