How Much Does Room Addition Cost in Boise, ID?
Boise pricing is near the national average. Updated for 2026.
Based on local labor rates, semi-arid climate conditions, and Boise's tech-agriculture-government economy.See our methodology
Room Addition Pricing in Boise, ID
Boise offers near-average pricing for room addition, making it a reasonable market for this service. The local tech-agriculture-government economy supports a tight labor pool, and the city's 230K population base ensures you can find multiple qualified providers to compare quotes.
Local climate plays a direct role in room addition costs here. Cold dry winters and hot summers; wildfire smoke increasingly affects air quality; rapid temperature changes stress building materials.
Market-specific factors matter in Boise: one of the fastest-growing US cities; massive population influx has created contractor shortages and rising prices.
Boise has moderate permitting requirements. Depending on the scope of your room addition project, you may need local permits. A licensed contractor will handle the permitting process as part of the job in most cases.
Boise vs National Average
What Affects Room Addition Cost in Boise?
Size
Small (100 sq ft): $15,000-$25,000. Average (200 sq ft): $30,000-$50,000. Large (400+ sq ft): $60,000-$100,000+
Room Type
Basic bedroom: $20,000-$40,000. Bedroom + bathroom: $35,000-$65,000. In-law suite: $50,000-$100,000+
Per Sq Ft
Budget: $80-$150/sq ft. Mid-range: $150-$250/sq ft. High-end: $250-$400+/sq ft
Boise Market Conditions
one of the fastest-growing US cities; massive population influx has created contractor shortages and rising prices
Local Climate Impact
cold dry winters and hot summers; wildfire smoke increasingly affects air quality; rapid temperature changes stress building materials
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Tips to Save on Room Addition in Boise
- 1.A bump-out (extending an existing room 2-4 feet) costs $5,000-$15,000 — much less than a full addition
- 2.Building over an existing garage or patio saves on foundation costs
- 3.A dormer addition (expanding attic space) costs 30-50% less than a ground-floor addition
- 4.Act as your own general contractor if you have experience — save 15-25% on management fees
📈 Room Addition in Boise Cost Trends (2020–2024)
Prices have increased +17.7% over the last 5 years
| Year | National Avg | YoY Change |
|---|---|---|
| 2020 | $37,459 | — |
| 2021 | $39,032 | +4.2% |
| 2022 | $41,569 | +6.5% |
| 2023 | $42,733 | +2.8% |
| 2024 | $44,100 | +3.2% |
Based on national averages adjusted for annual inflation. Actual costs vary by location and project scope.
💬 What Did You Pay?
Real costs reported by homeowners for Room Addition in Boise
Recent Reports
Frequently Asked Questions
Does a room addition increase home value?
Yes, though ROI varies: 50-65% for a standard room addition, 60-75% for a bedroom + bathroom addition. The value also depends on whether the addition fits the neighborhood — over-improving for your area yields lower returns.
How long does a room addition take?
Typical timeline: 2-4 weeks for permits and planning. 8-16 weeks for construction. Total: 3-5 months. Complex additions with full bathrooms or custom features can take 6-12 months.
Why does room addition cost different in Boise than other cities?
Boise's costs reflect local labor rates driven by the tech-agriculture-government economy, semi-arid climate conditions that affect materials and scheduling, and moderate permitting requirements. The tight labor market also influences competitive pricing.
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