How Much Does Home Addition Cost in Salt Lake City, UT?
Updated March 2026 · Salt Lake City metro area · Based on BLS wage data and local market costs
Itemized Cost Breakdown
Estimated for Addition size (sq ft): 300 sqft · Mid-Range tier · Local cost index: 0.96x
| Line Item | Low | Mid | High |
|---|---|---|---|
Foundation Slab, crawlspace, or basement foundation | $2,880 | $5,760 | $8,640 |
Framing Walls, roof tie-in, headers, and sheathing | $3,456 | $5,328 | $7,200 |
Roofing New roof section tied into existing roof Shop Roofing Materials | $1,440 | $2,880 | $4,320 |
Exterior finish Siding, windows, and exterior trim to match | $2,304 | $4,032 | $5,760 |
Electrical New circuits, outlets, lighting, panel capacity | $1,440 | $2,880 | $4,320 |
Plumbing (if applicable) Water/drain lines for bath or kitchen addition | $0 | $3,600 | $7,200 |
HVAC extension Duct runs and tonnage increase for new space | $864 | $1,872 | $2,880 |
Interior finish Drywall, paint, flooring, trim, doors | $2,880 | $5,760 | $8,640 |
Permits & engineering Building permit, structural engineering, plan review | $960 | $2,880 | $4,800 |
General contractor overhead Project management, coordination, insurance | $2,304 | $4,032 | $5,760 |
| Total Estimated Cost | $18,528 | $39,024 | $59,520 |
Costs adjusted for local market conditions. Actual prices vary based on project specifics, contractor, and material choices.
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View itemized breakdown
| Item | Low | High |
|---|---|---|
| Foundation | $2,880 | $8,640 |
| Framing | $3,456 | $7,200 |
| Roofing | $1,440 | $4,320 |
| Exterior finish | $2,304 | $5,760 |
| Electrical | $1,440 | $4,320 |
| Plumbing (if applicable) | $0 | $7,200 |
| HVAC extension | $864 | $2,880 |
| Interior finish | $2,880 | $8,640 |
| Permits & engineering | $960 | $4,800 |
| General contractor overhead | $2,304 | $5,760 |
| Total | $18,528 | $59,520 |
Estimates based on local cost data. Get quotes from licensed contractors for accurate pricing.
What Drives Home Addition Cost in Salt Lake City?
The average cost of home addition in Salt Lake City, UT is $43,200 per project. Most homeowners pay between $19,200 and $76,800, depending on the scope of work, materials selected, and contractor experience.
Construction of new living space added to an existing home.
Local Labor Costs
Construction workers in Salt Lake City earn an average of $22.6/hr — 1% below the national average. Labor typically accounts for 40-60% of total project cost.
Materials in UT are subject to 6.85% sales tax, which adds to the overall project cost. For a $43,200 project, expect roughly $1,184 in tax on materials alone.
Salt Lake City issued approximately 9,400 residential building permits in 2023, putting it in the mid-range of US construction markets. High permit activity can mean busier contractors and longer wait times for scheduling.
Factors That Affect Cost
- Square footage
- Foundation type
- Finishes
- Plumbing/electrical
- Permits
- Roof tie-in
- Contractor experience — Established contractors with strong reviews may charge 10-20% more
- Local cost of living — Salt Lake City's cost index is 0.96x the national baseline
Best Time for Home Addition in Salt Lake City
Salt Lake City has cold, snowy winters and warm, dry summers. Construction season runs May through October. Winter ground freezing stops foundation and excavation work. The inversion season (winter smog) can delay some exterior finishing.
Best Months
May, Jun, Jul, Aug, Sep
Lower demand often means better pricing and faster scheduling.
Peak Season (Higher Prices)
Dec, Jan, Feb
High demand can add 10-20% to project costs.
Monthly Weather in Salt Lake City
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg High | 37° | 43° | 54° | 62° | 73° | 84° | 93° | 91° | 80° | 65° | 49° | 37° |
| Avg Low | 21° | 25° | 33° | 39° | 48° | 57° | 65° | 64° | 53° | 41° | 30° | 21° |
| Rain (in) | 1.3 | 1.2 | 1.8 | 2.1 | 2 | 0.9 | 0.7 | 0.7 | 1.1 | 1.5 | 1.4 | 1.3 |
Source: Open-Meteo historical data (2024)
Licensing & Permits in UT
Utah requires contractor licensing through the Division of Professional Licensing (DOPL). General contractors, specialty contractors, and handyman exemptions for projects under $3,000.
Verify a contractor's license at Utah Division of Professional Licensing.
0How to Save Money on Home Addition
- Get at least 3 quotes from licensed contractors in Salt Lake City
- Schedule during off-peak months (May, Jun, Jul, Aug, Sep) for lower prices
- Clarify permit costs upfront — they vary by jurisdiction
- Consider mid-range materials for the best value-to-quality ratio
- Verify contractor licensing through Utah Division of Professional Licensing
- Ask about material package deals or contractor supplier discounts
Frequently Asked Questions
How much does a home addition cost per square foot?
Home Addition Cost in Other Cities
Other Costs in Salt Lake City
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