Home Addition Cost in 20 US Cities (2026)
Construction of new living space added to an existing home.
National Average (per project)
Low
$20,000
Average
$45,000
High
$80,000
Home Addition Cost Breakdown
| Item | Description | Low | High | Unit |
|---|---|---|---|---|
| Foundation | Slab, crawlspace, or basement foundation | $10 | $30 | per sqft |
| Framing | Walls, roof tie-in, headers, and sheathing | $12 | $25 | per sqft |
| Roofing | New roof section tied into existing roof | $5 | $15 | per sqft |
| Exterior finish | Siding, windows, and exterior trim to match | $8 | $20 | per sqft |
| Electrical | New circuits, outlets, lighting, panel capacity | $5 | $15 | per sqft |
| Plumbing (if applicable) | Water/drain lines for bath or kitchen addition | $0 | $25 | per sqft |
| HVAC extension | Duct runs and tonnage increase for new space | $3 | $10 | per sqft |
| Interior finish | Drywall, paint, flooring, trim, doors | $10 | $30 | per sqft |
| Permits & engineering | Building permit, structural engineering, plan review | $1,000 | $5,000 | flat |
| General contractor overhead | Project management, coordination, insurance | $8 | $20 | per sqft |
* These are national average costs. Actual prices vary by city — select a metro below for local estimates.
Construction of new living space added to an existing home.
Home Addition Cost by City
Houston, TX
per project
$42,750
$19,000–$76,000
Dallas, TX
per project
$43,650
$19,400–$77,600
Phoenix, AZ
per project
$41,850
$18,600–$74,400
San Antonio, TX
per project
$39,600
$17,600–$70,400
Austin, TX
per project
$45,900
$20,400–$81,600
Fort Myers, FL
per project
$43,200
$19,200–$76,800
Charlotte, NC
per project
$42,300
$18,800–$75,200
Nashville, TN
per project
$43,200
$19,200–$76,800
Raleigh, NC
per project
$42,750
$19,000–$76,000
Boise, ID
per project
$41,400
$18,400–$73,600
Tampa, FL
per project
$42,750
$19,000–$76,000
Denver, CO
per project
$47,250
$21,000–$84,000
Atlanta, GA
per project
$43,650
$19,400–$77,600
Orlando, FL
per project
$42,300
$18,800–$75,200
Jacksonville, FL
per project
$40,950
$18,200–$72,800
Las Vegas, NV
per project
$44,100
$19,600–$78,400
Salt Lake City, UT
per project
$43,200
$19,200–$76,800
Columbus, OH
per project
$40,500
$18,000–$72,000
Indianapolis, IN
per project
$40,050
$17,800–$71,200
San Diego, CA
per project
$53,100
$23,600–$94,400