Detached garage cost in Idaho
Statewide estimate from BLS wages and BEA prices. Reviewed Nov 4, 2026.
- Statewide range (576 sq ft)
- $27,500 – $55,200
- Per sq ft
- $47.50 – $95
- before permit
- Versus US midpoint
- −5%
- US $43,500
- Metros covered
- 3
What does it cost to build a detached garage in Idaho? Plan on $27,500 to $55,200 for 576 sq ft. Wages (0.94x the US blend), materials (price index 96.3) and permit costs (95.5) put the state below the national midpoint by 5%.
Inside Idaho, the metros we cover range from $41,000 (Idaho Falls) to $42,600 (Coeur d'Alene) at the midpoint. Pick your closest city in the table for a tighter number.
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Estimated cost for 576 sq ft in Idaho (statewide), standard level
$35,800 to $46,900
About $62 to $81 per sq ft before permits. Labor is about 49% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $18,000 | $23,600 |
| Labor | $17,600 | $23,000 |
| Permits and fees | $240 | $380 |
| Total | $35,800 | $46,900 |
Cost breakdown for 576 sq ft in Idaho
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $13,900 | $20,800 | $27,700 | 50% |
| Labor | $13,500 | $20,300 | $27,000 | 49% |
| Permits and fees | $140 | $310 | $480 | 1% |
| Total | $27,500 | $41,400 | $55,200 | 100% |
Idaho versus the states around it
Idaho ranks 33 of 51 (the 50 states plus DC) for detached garage, where 1 is the most expensive. The costliest is Hawaii at $56,300 and the cheapest Arkansas at $37,800, both for 576 sq ft at the midpoint. Idaho sits at $41,400. The five states closest by workforce center are listed below.
| State | Distance | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Montana | 270 miles away | $28,900 – $58,000 | $43,500 | +5% |
| Utah | 280 miles away | $27,300 – $54,800 | $41,000 | −1% |
| Oregon | 350 miles away | $31,600 – $63,400 | $47,500 | +15% |
| Washington | 380 miles away | $33,300 – $66,900 | $50,100 | +21% |
| Nevada | 460 miles away | $29,000 – $58,200 | $43,600 | +5% |
Weather windows across Idaho
Season matters for detached garage. For each Idaho metro below we took NOAA's 1991-2020 monthly normals from the nearest suitable station and counted comfortable months for pouring concrete.
Coeur d'Alene has the longest comfortable season of the metros we cover in Idaho at 5 months (May through September); Idaho Falls has the shortest at 4 (June through September). Rainfall runs from 10 inches a year in Idaho Falls to 25 inches in Coeur d'Alene.
We do not adjust prices by month, because we have no reliable published data on seasonal pricing. Timing is still worth raising when you collect bids.
| Metro | Jan avg low °F | Jul avg high °F | Precip (in/yr) | Comfortable months |
|---|---|---|---|---|
| Boise | 26 | 93 | 12 | 4: May through June and September through October |
| Idaho Falls | 12 | 87 | 10 | 4: June through September |
| Coeur d'Alene | 26 | 83 | 25 | 5: May through September |
Detached garage cost by metro in Idaho
1 of the 3 metros sit above the statewide midpoint of $41,400, and the top-to-bottom gap is 4%. Each row prices the default size with that metro's own BLS wages and BEA price levels, so the gap between rows is real local variation rather than a flat markup.
| Metro | Range (576 sq ft) | Midpoint | vs. state |
|---|---|---|---|
| Coeur d'Alene, ID | $28,300 – $56,800 | $42,600 | +3% |
| Boise, ID | $27,400 – $55,100 | $41,200 | level |
| Idaho Falls, ID | $27,300 – $54,800 | $41,000 | −1% |
Quality levels and sizes in Idaho
The cited range is cut into three overlapping bands (basic, standard and premium) and scaled to statewide Idaho wages and prices. The grid prices the same bands at 4 common sizes.
Basic
$27,500 to $38,600
Basic shell: slab, framing, siding, a roll-up door
Standard
$35,800 to $46,900
Finished exterior, insulated, electrical and a nicer door
Premium
$44,100 to $55,200
Insulated and drywalled, heat and cooling, upgraded finishes
| Size | Basic | Standard | Premium |
|---|---|---|---|
| 1-car (12x20), 240 sq ft | $11,500 – $16,200 | $15,100 – $19,800 | $18,600 – $23,300 |
| 2-car (24x24), 576 sq ft | $27,500 – $38,600 | $35,800 – $46,900 | $44,100 – $55,200 |
| 2.5-car (24x30), 720 sq ft | $34,400 – $48,200 | $44,700 – $58,500 | $55,100 – $68,900 |
| 3-car (900 sq ft) | $42,900 – $60,200 | $55,800 – $73,100 | $68,800 – $86,000 |
Related projects, priced for Idaho
The table prices neighboring jobs at their usual sizes using statewide Idaho wages and prices. Against national midpoints, concrete driveway comes out highest (−2%) and home addition lowest (−9%), because each job leans on different trades.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Concrete slab | 400 sq ft | $2,400 – $5,050 | −3% |
| Garage door | 1 door | $660 – $3,500 | −5% |
| Concrete driveway | 600 sq ft | $3,550 – $9,000 | −2% |
| Home addition | 300 sq ft | $34,700 – $70,300 | −9% |
Detached garage: what moves the price in Idaho
Size and finish level
HomeGuide puts a 2-car detached garage at $20,000-$57,600, with the spread driven by how finished it is.
Foundation
A slab is cheapest. A frost-depth foundation in cold states costs more.
Garage apartments
A garage with living space is a different project: HomeGuide puts them at $80,000-$300,000.
Permits
You need a permit for a detached garage: $150-$500 on average, with separate electrical or plumbing permits if those are involved.
Electrical
Running power to a detached garage costs $1,000-$3,800 for a standard build and $5,000 or more for a long trench or amperage upgrade (Angi, Trusscore).
What carpenters and the other trades earn in Idaho
Statewide wages come from BLS's state-level estimates, which blend big cities with small towns and rural areas. 5 trades drive the labor line for this job, and the weighted ratio against the national wage level is 0.94 for Idaho.
For carpenters (47-2031, weighted 45%) the local median is $25.00 an hour, which is 14% below the national $29.12. The middle half of them earn between $21.76 and $30.25 an hour. BLS counts 8,380 of them working in the state, 97.7 for every 10,000 jobs (US: 43.1), so the local bench is deeper than average.
Construction laborers (47-2061), 20% of the weighting: a median of $22.57 an hour, in line with the US median of $22.66. The middle half of them earn between $19.02 and $26.46 an hour. About 10,850 work in the state. That is 126.5 per 10,000 jobs, compared with 70.5 nationally, which suggests plenty of local crews to bid.
For cement masons and concrete finishers (47-2051, weighted 15%) the local median is $27.12 an hour, which is in line with the national $27.41. The middle half of them earn between $22.92 and $29.35 an hour. BLS counts 2,540 of them working in the state, 29.6 for every 10,000 jobs (US: 13.3), so the local bench is deeper than average.
Electricians (47-2111), 10% of the weighting: a median of $30.29 an hour, in line with the US median of $30.38. The middle half of them earn between $23.26 and $39.44 an hour. About 5,690 work in the state. That is 66.4 per 10,000 jobs, compared with 48.7 nationally, which suggests plenty of local crews to bid.
For roofers (47-2181, weighted 10%) the local median is $27.78 an hour, which is 4% above the national $26.65. The middle half of them earn between $19.92 and $30.57 an hour. BLS counts 1,190 of them working in the state, 13.9 for every 10,000 jobs (US: 8.7), so the local bench is deeper than average.
A crew paid at the 75th percentile for carpenters ($30.25 an hour) would add about $1,750 to the statewide midpoint; one at the 25th percentile ($21.76) would take off about $1,100. Use that as a rough guide to how far a bid can sit from our midpoint on wages alone.
BLS counts 857,440 jobs across Idaho (May 2025), which is 0.6% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 45% | $21.76 | $25.00 | $30.25 | $29.12 | 0.86 | state |
| Cement masons and concrete finishers (47-2051) | 15% | $22.92 | $27.12 | $29.35 | $27.41 | 0.99 | state |
| Construction laborers (47-2061) | 20% | $19.02 | $22.57 | $26.46 | $22.66 | 1.00 | state |
| Electricians (47-2111) | 10% | $23.26 | $30.29 | $39.44 | $30.38 | 1.00 | state |
| Roofers (47-2181) | 10% | $19.92 | $27.78 | $30.57 | $26.65 | 1.04 | state |
| Blended | 100% | 0.94 | |||||
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Detached garage in Idaho: your questions
+How much does it cost to build a detached garage in Idaho?
$27,500 to $55,200 for 576 sq ft, using statewide wages and prices. Metro areas inside Idaho can sit above or below that.
+Which city in Idaho is cheapest for detached garage?
Idaho Falls at about $41,000 (midpoint, 576 sq ft). The priciest is Coeur d'Alene at $42,600.
+Is detached garage cheaper in Idaho than the US average?
It is 5% cheaper: $41,400 against $43,500 for 576 sq ft at the midpoint.
+What share of the price is labor in Idaho?
About 49% ($20,300). Materials are 50%. Statewide labor for this job is weighted 0.94x the national wage level.
+What do carpenters earn in Idaho?
The BLS statewide median is $25.00 an hour, against $29.12 for the US. The 25th to 75th percentile range is $21.76 to $30.25.
+Where does Idaho rank for detached garage costs?
33rd most expensive of 51 (the 50 states plus DC) at the midpoint, $41,400 for 576 sq ft. Rank 1 is the costliest.
+What do basic and premium detached garage work cost in Idaho?
For 576 sq ft, basic work runs $27,500 to $38,600 and premium work $44,100 to $55,200. Basic means: basic shell: slab, framing, siding, a roll-up door. Premium means: insulated and drywalled, heat and cooling, upgraded finishes.
+Does the season matter for detached garage in Idaho?
Yes where winters or summers are hard. Of the Idaho metros we cover, Coeur d'Alene has the most comfortable months (5 of 12) based on NOAA 1991-2020 normals. Our prices do not change by month, so ask contractors whether they charge more or less in busy and slow seasons.
Detached garage by city in Idaho
Where these numbers come from
Base prices are national ranges from the sources below. We scale labor by local BLS wages, materials by BEA goods prices and permits by the BEA all-items price level. Full method on the methodology page.
- HomeGuide: How Much Does a Detached Garage Cost? (2026) (accessed November 4, 2026)
- Trusscore: How Much Does It Cost to Build a Garage? 2026 Price Guide (accessed November 4, 2026)
- Angi: How Much Does It Cost to Build a Detached Garage? [2026 Data] (accessed November 4, 2026)
- HomeGuide: 2026 Building Permit Costs | Fees & Cost Calculator (accessed November 4, 2026)
- BLS Occupational Employment and Wage Statistics, May 2025
- BEA Regional Price Parities, 2024
- NOAA NCEI U.S. Climate Normals, 1991-2020
Note on derived figures: Materials = installed range / 1.6, because Angi puts professional labor at roughly an additional 60% of the materials cost (materials about 62.5% of the total).