Home addition cost in Coeur d'Alene, ID
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $35,700 – $72,300
- Per sq ft
- $117 – $235
- before permit
- Versus US midpoint
- −6%
- US $57,500
- Rank of 300 metros
- #158
- 1 = most expensive
If you want to build a home addition in Coeur d'Alene, plan on $35,700 to $72,300 for 300 sq ft, all in. Per sq ft, that is $117 to $235 for materials and labor, with the permit on top. The local midpoint runs 6% lower than the national one. Carpenters earn a median of $27.00 an hour in the Coeur d'Alene area, 7% below the US median of $29.12.
Estimate your home addition cost
Pick a size, a quality level and where you live. Prices update as you type.
Estimated cost for 300 sq ft in Coeur d'Alene, ID, standard level
$46,700 to $61,300
About $152 to $199 per sq ft before permits. Labor is about 66% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $15,000 | $19,600 |
| Labor | $30,700 | $40,200 |
| Permits and fees | $930 | $1,500 |
| Total | $46,700 | $61,300 |
Cost breakdown for 300 sq ft in Coeur d'Alene, ID
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,500 | $17,300 | $23,100 | 32% |
| Labor | $23,600 | $35,500 | $47,300 | 66% |
| Permits and fees | $490 | $1,250 | $1,950 | 2% |
| Total | $35,700 | $54,000 | $72,300 | 100% |
What is behind the Coeur d'Alene number
We price the labor side from BLS wage data for 6 trades: carpenters at 50%, cement masons and concrete finishers at 10%, electricians at 10%, plumbers, pipefitters and steamfitters at 10%, drywall and ceiling tile installers at 10%, roofers at 10%. Weighted together, Coeur d'Alene wages are 0.93 times the national level. Labor makes up about 66% of the midpoint estimate (67% at national prices).
On the materials line, the BEA goods price index for the Coeur d'Alene metro is 96.2 (US = 100). The midpoint materials bill for 300 sq ft comes to $17,300, compared with $18,000 at national prices. Permit and inspection fees are scaled by the broader index (98.3) and land at $490 to $1,950.
Data note: 20% of the labor weighting for this project uses a statewide median because BLS has no published metro figure for that trade in Coeur d'Alene. The wage table below marks each row.
Why two Coeur d'Alene quotes can differ
Plumbing and fixtures
Adding a bathroom or kitchen drives the price up the most.
Permits
Construction permits run $500-$2,000, or $5-$21 per $1,000 of project cost (HomeGuide).
Foundation
A foundation, framing, roofing and matching exterior finishes all have to be built before the interior work starts.
Climate in Coeur d'Alene: timing your home addition job
We use NOAA's 1991-2020 climate normals for Coeur D'Alene (in the city). These are 30-year monthly averages, not forecasts.
April through October is the stretch where digging, grading and setting material in the ground runs into the fewest weather problems in Coeur d'Alene (7 of 12 months). January, February, March, November and December have an average overnight low at or below freezing (32°F).
In January, February, March, November and December the average low is at or below freezing, which means frozen ground and slower digging, compaction and sod or stone placement. NOAA counts about 121 days a year with a low at or below 32°F at this station.
Coeur d'Alene gets about 25 inches of precipitation in a normal year. The wettest months are January, November and December (3.5 inches in December). Inside the workable window, July and August are the driest, at 0.7 and 0.8 inches. The station averages about 18 days a year at 90°F or above.
Does the season change the price? Probably, but we do not have a sourced seasonal price curve, so the estimator shows a year-round figure and does not adjust by month. When you collect quotes, ask whether scheduling in a slower month gets a better rate.
| Month | Avg high °F | Avg low °F | Precip (in) | For this job |
|---|---|---|---|---|
| Jan | 36 | 26 | 3.2 | Cold |
| Feb | 41 | 27 | 2.1 | Cold |
| Mar | 48 | 31 | 2.7 | Cold |
| Apr | 56 | 37 | 1.9 | Workable |
| May | 66 | 44 | 2.1 | Workable |
| Jun | 72 | 51 | 2.2 | Workable |
| Jul | 83 | 57 | 0.7 | Workable |
| Aug | 83 | 56 | 0.8 | Workable |
| Sep | 74 | 48 | 0.8 | Workable |
| Oct | 58 | 39 | 2.0 | Workable |
| Nov | 44 | 32 | 3.3 | Cold |
| Dec | 36 | 26 | 3.5 | Cold |
Related projects, priced for Coeur d'Alene
Because every project leans on different trades, Coeur d'Alene's wage level does not move all prices equally. Against the US midpoint, roof replacement runs +2% and bathroom remodel −9%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $17,600 – $29,900 | −5% |
| Bathroom remodel | 45 sq ft | $4,300 – $21,300 | −9% |
| Detached garage | 576 sq ft | $28,300 – $56,800 | −2% |
| Roof replacement | 2,000 sq ft of roof | $6,250 – $12,600 | +2% |
Pick a size, pick a tier: home addition pricing in Coeur d'Alene
Three bands are cut from the same cited range and localized for Coeur d'Alene wages and prices. They overlap on purpose: a good standard job and a modest premium job can cost the same. The grid below prices the same bands at 3 common sizes.
Basic
$35,700 to $50,300
Bump-out or simple room without plumbing
Standard
$46,700 to $61,300
Standard room addition with HVAC and electrical
Premium
$57,700 to $72,300
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $12,200 – $17,500 | $16,200 – $21,500 | $20,100 – $25,400 |
| 20x20 room (400 sq ft) | $47,400 – $66,700 | $61,900 – $81,300 | $76,400 – $95,800 |
| large suite (600 sq ft) | $70,900 – $99,600 | $92,400 – $121,000 | $114,000 – $142,500 |
Coeur d'Alene labor market for home addition
Wages are the part of this estimate that changes most from town to town. 6 trades carry the job here, and each is compared with its US median. The weighted result for Coeur d'Alene is 0.93 times the national level.
For carpenters (47-2031, weighted 50%) the local median is $27.00 an hour, which is 7% below the national $29.12. The middle half of them earn between $23.14 and $30.11 an hour. BLS counts 790 of them working in the area, 109.3 for every 10,000 jobs (US: 43.1), so the local bench is deeper than average.
For cement masons and concrete finishers (47-2051, weighted 10%) the local median is $27.69 an hour, which is in line with the national $27.41. The middle half of them earn between $23.80 and $31.32 an hour. BLS counts 270 of them working in the area, 37.4 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 $31.90 an hour, 5% above the US median of $30.38. The middle half of them earn between $25.08 and $40.46 an hour. About 480 work in the metro. That is 66.4 per 10,000 jobs, compared with 48.7 nationally, which suggests plenty of local crews to bid.
For plumbers, pipefitters and steamfitters (47-2152, weighted 10%) the local median is $24.17 an hour, which is 21% below the national $30.67. The middle half of them earn between $23.56 and $30.65 an hour. BLS counts 260 of them working in the area, 36.0 for every 10,000 jobs (US: 30.0), so the local bench is deeper than average.
Drywall and ceiling tile installers (47-2081) carry 10% of the labor weighting. BLS does not publish this trade for the Coeur d'Alene metro, so we used the Idaho statewide median: $21.05 an hour against $28.33 for the US. The middle half of them earn between $17.11 and $27.68 an hour.
Roofers (47-2181) carry 10% of the labor weighting. BLS does not publish this trade for the Coeur d'Alene metro, so we used the Idaho statewide median: $27.78 an hour against $26.65 for the US. The middle half of them earn between $19.92 and $30.57 an hour.
Quotes come from real crews, not medians. If the carpenters on your job are paid at the 75th percentile ($30.11 an hour) instead of the median, the labor line grows by about $2,050. At the 25th percentile ($23.14) it shrinks by about $2,550. The total moves by 3.8% or 4.7%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 72,280 jobs in the Coeur d'Alene area. That makes it the 254th largest of the 300 metros we cover, with 0.05% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $23.14 | $27.00 | $30.11 | $29.12 | 0.93 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $23.80 | $27.69 | $31.32 | $27.41 | 1.01 | metro |
| Electricians (47-2111) | 10% | $25.08 | $31.90 | $40.46 | $30.38 | 1.05 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $23.56 | $24.17 | $30.65 | $30.67 | 0.79 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $17.11 | $21.05 | $27.68 | $28.33 | 0.74 | state |
| Roofers (47-2181) | 10% | $19.92 | $27.78 | $30.57 | $26.65 | 1.04 | state |
| Blended | 100% | 0.93 | |||||
Coeur d'Alene against nearby metros and the rest of Idaho
Contractors rarely work more than an hour or two from home, so the neighboring metros set a rough ceiling and floor for your quotes. Midpoints for 300 sq ft range from $54,000 to $70,900 across Coeur d'Alene and its five closest metros.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Coeur d'Alene, IDthis page | $35,700 – $72,300 | $54,000 | |
| Spokane, WA55 miles | $41,500 – $84,000 | $62,700 | +16% |
| Missoula, MT120 miles | $38,300 – $77,500 | $57,900 | +7% |
| Kennewick, WA150 miles | $43,500 – $88,100 | $65,800 | +22% |
| Yakima, WA210 miles | $41,100 – $83,200 | $62,100 | +15% |
| Seattle, WA240 miles | $46,900 – $94,800 | $70,900 | +31% |
| Idaho (statewide) | $34,700 – $70,300 | $52,500 | −3% |
| United States | $38,000 – $77,000 | $57,500 | +6% |
Across 300 US metros, Coeur d'Alene comes in at #158 from the top. The priciest is Honolulu, HI at $79,600; the cheapest is Brownsville, TX at $44,300 (midpoints, 300 sq ft). Statewide, Coeur d'Alene is 3% above the Idaho figure.
Other Idaho metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Boise, ID | 391,790 jobs | $34,700 – $70,400 | $52,500 | −3% |
| Idaho Falls, ID | 81,840 jobs | $34,500 – $69,900 | $52,200 | −3% |
Cities with a workforce like Coeur d'Alene's
Big cities and small ones price differently, so here is Coeur d'Alene against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Prescott Valley, AZ | 72,300 jobs | $35,100 – $71,200 | $53,100 | −2% |
| Bangor, ME | 72,270 jobs | $35,900 – $72,900 | $54,400 | +1% |
| Auburn, AL | 72,710 jobs | $32,400 – $65,800 | $49,100 | −9% |
| Bozeman, MT | 72,210 jobs | $40,000 – $81,000 | $60,500 | +12% |
Get 3 local quotes
Tell us about the job and we will try to connect you with up to three local contractors for written quotes. It is free and you are under no obligation to hire. Your estimate of $46,700 to $61,300 for Coeur d'Alene, ID is attached.
Detailed home addition report for Coeur d'Alene, ID, $9
Multi-page report for Coeur d'Alene, ID: low, typical and high cost, a line-item breakdown of materials and labor by trade, permit notes, the best months to schedule, a quote comparison sheet, red flags, questions for contractors, checklists and every source. Save your estimate above, preview page 1 free, and unlock the full report for $9 one-time, or get every report with CostLocal Pro.
Home addition in Coeur d'Alene: your questions
+How much does it cost to build a home addition in Coeur d'Alene?
For 300 sq ft, expect $35,700 to $72,300 in the Coeur d'Alene area. A standard-spec job lands at $46,700 to $61,300. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in Coeur d'Alene?
About $117 to $235 per sq ft for materials and labor, plus $490 to $1,950 for the permit if one is needed. The US range is $125 to $250.
+Is home addition cheaper in Coeur d'Alene or Spokane?
Spokane is 55 miles away. The midpoint for 300 sq ft there is $62,700, which is 16% more than Coeur d'Alene ($54,000). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Coeur d'Alene?
About 66% at the midpoint, or $35,500 out of $54,000. Materials are 32% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Coeur d'Alene?
$47,400 to $95,800. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Coeur d'Alene?
Often, but rules are set by your city or county building office, so call before you hire. Budget $490 to $1,950 for fees in the Coeur d'Alene area (our national range of $500 to $2,000 scaled by the local price level).
+Is Coeur d'Alene expensive for home addition compared with the rest of Idaho?
Coeur d'Alene is 3% above the Idaho statewide estimate ($52,500 at the midpoint). We cover 3 metros in Idaho; see the state page to compare them.
+What do carpenters earn in Coeur d'Alene?
The BLS median is $27.00 an hour in the Coeur d'Alene area, compared with $29.12 nationally. The 25th to 75th percentile range is $23.14 to $30.11.
+What do basic and premium home addition work cost in Coeur d'Alene?
For 300 sq ft, basic work runs $35,700 to $50,300 and premium work $57,700 to $72,300. Basic means: bump-out or simple room without plumbing. Premium means: large addition with bath or kitchen and a new foundation.
+When is the best time to build a home addition in Coeur d'Alene?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are April through October. July and August are typically the driest of those months. Local contractors' schedules matter as much as the weather, so book early for the busy months.
Home addition near Coeur d'Alene
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 Home Addition Cost? (2026) (accessed November 4, 2026)
- Cost to Renovate: Renovation Labor Report 2026: Where the Money Goes (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 = 32% of the installed price, from Cost to Renovate's mid-range 'Structural' category split (56% labor, 32% materials, 11% permits and design). It is a category average rather than an addition-specific figure.