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Home Addition Construction Cost in Boulder, CO
Detailed pricing guide with local market adjustments and material comparisons
Boulder Average
$30,000–$112,500
Market Tier
Town
Cost Breakdown
Home Addition Construction Cost in Boulder
TownLowAverageHigh
$30,000$71,250$112,500
Market Tier
Town (0.75x)
Small town with lower labor and material costs
Material Cost Comparison
Foundation concrete(Budget)
$22,500–$84,375Framing lumber(Mid-Range)
$30,000–$112,500Roofing materials(Premium)
$42,000–$157,500Factors that affect your cost
- Addition size (square footage)
- Number of stories
- Foundation type
- Roofing integration with existing
- Plumbing and electrical scope
- HVAC extension
- Architectural design
- Permit and engineering fees
- Interior finish level
- Landscaping restoration
Get Quotes in Boulder
Boulder Housing Market
Median Home Price
$900,000
Homes for Sale
191
Price per Sq Ft
$504
Local Pros
600
Home Service Professionals Near Boulder
Agents 115lender 89multimedia_specialist 80Landscapers 68Roofers 67Electricians 62Painters 61Flooring 58
Median Household Income
$85,364
Median Home Value
$982,600
Median Rent
$1,924/mo
Homeownership Rate
47.9%
Population
106,274
Median Year Built
1978
Source: U.S. Census Bureau, ACS 2023 5-Year Estimates
Track Your Costs
Renovation
Home Addition Construction
Date
April 2026
Cost
$71,250
Vendor
Your local pro
Warranty
10-year material warranty
Boulder average: $30,000–$112,500
Before
Issue documented with photos
After
Repair completed, area sealed
Materials Used
Foundation concreteFraming lumberRoofing materialsWindows and doors
Warranty Details
10-year material warranty
Auto-Checkup Created
"Addition Inspection" — every 24 months
Added by youApril 2026
Property Health Score
Good
89
interior category +20 pts(69 → 89)
Documentation19/25
Maintenance20/25
Warranty22/25
Investment21/25
Your health score is calculated based on documentation completeness, maintenance currency, warranty coverage, and investment tracking.
Get a Personalized Estimate
Find a remodeling near me
Find a remodeling near me
I found several remodeling contractors in your area. Here are the top results:
SM
Smith & Sons
Connectedremodeling contractor
4.9(47)
BookQuote
JR
J&R Home Services
remodeling contractor
4.7(23)
From $95/hr
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Title:remodeling
Category:remodeling contractor
Date:2026-04-06
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Cost FAQ
What is the average cost of home addition construction in Boulder?
The average cost of home addition construction in Boulder, CO ranges from $30,000 to $112,500. The final price depends on Addition size (square footage), Number of stories, Foundation type.
What factors affect home addition construction cost?
Key factors include: Addition size (square footage), Number of stories, Foundation type, Roofing integration with existing, Plumbing and electrical scope, HVAC extension, Architectural design, Permit and engineering fees, Interior finish level, Landscaping restoration. In Boulder, local labor rates and material availability also influence pricing.
How do I get accurate quotes for home addition construction in Boulder?
Get at least 3 quotes from licensed professionals in Boulder. Use Fizbo SmartSearch to find and compare local remodelings, read reviews, and request estimates — all in one place.