Home addition cost in Eau Claire, WI
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $38,600 – $78,000
- Per sq ft
- $127 – $254
- before permit
- Versus US midpoint
- +1%
- US $57,500
- Rank of 300 metros
- #102
- 1 = most expensive
If you want to build a home addition in Eau Claire, plan on $38,600 to $78,000 for 300 sq ft, all in. Per sq ft, that is $127 to $254 for materials and labor, with the permit on top. The local midpoint lands close to the national one. Carpenters earn a median of $28.41 an hour in the Eau Claire area, 2% below the US median of $29.12.
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Estimated cost for 300 sq ft in Eau Claire, WI, standard level
$50,400 to $66,200
About $165 to $216 per sq ft before permits. Labor is about 69% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $14,600 | $19,100 |
| Labor | $34,900 | $45,600 |
| Permits and fees | $880 | $1,450 |
| Total | $50,400 | $66,200 |
Cost breakdown for 300 sq ft in Eau Claire, WI
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,300 | $16,900 | $22,500 | 29% |
| Labor | $26,800 | $40,300 | $53,700 | 69% |
| Permits and fees | $460 | $1,150 | $1,850 | 2% |
| Total | $38,600 | $58,300 | $78,000 | 100% |
What is behind the Eau Claire number
The wage side of the estimate leans on carpenters, who do 50% of the hours on a typical job. Their local median is $28.41 an hour. Add the other trades involved and the blended wage index for Eau Claire is 1.05 (US = 1.00), which puts labor at 69% of the total.
On the materials line, the BEA goods price index for the Eau Claire metro is 93.8 (US = 100). The midpoint materials bill for 300 sq ft comes to $16,900, compared with $18,000 at national prices. Permit and inspection fees are scaled by the broader index (92.8) and land at $460 to $1,850.
Eau Claire: what basic, standard and premium work costs
Three bands are cut from the same cited range and localized for Eau Claire 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
$38,600 to $54,400
Bump-out or simple room without plumbing
Standard
$50,400 to $66,200
Standard room addition with HVAC and electrical
Premium
$62,300 to $78,000
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $13,200 – $18,800 | $17,400 – $23,000 | $21,600 – $27,300 |
| 20x20 room (400 sq ft) | $51,300 – $72,100 | $66,900 – $87,800 | $82,600 – $103,500 |
| large suite (600 sq ft) | $76,700 – $107,500 | $99,900 – $131,000 | $123,000 – $154,000 |
Specs and site conditions that change a Eau Claire bid
Type of addition
A new room is $125-$250 per sq ft; a bump-out $85-$200; an attic conversion $50-$150; a garage conversion $50-$200 (HomeGuide).
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).
Climate in Eau Claire: timing your home addition job
We use NOAA's 1991-2020 climate normals for Eau Claire Rgnl Ap (5 miles from the city center). 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 Eau Claire (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 163 days a year with a low at or below 32°F at this station.
Eau Claire gets about 33 inches of precipitation in a normal year, including roughly 55 inches of snow. The wettest months are May, June and August (4.8 inches in June). Inside the workable window, April and October are the driest, at 3.1 and 2.5 inches. The station averages about 10 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 | 23 | 6 | 1.0 | Cold |
| Feb | 28 | 9 | 1.1 | Cold |
| Mar | 41 | 21 | 2.0 | Cold |
| Apr | 57 | 33 | 3.1 | Workable |
| May | 70 | 45 | 3.9 | Workable |
| Jun | 79 | 56 | 4.8 | Workable |
| Jul | 83 | 60 | 3.6 | Workable |
| Aug | 80 | 58 | 4.2 | Workable |
| Sep | 72 | 49 | 3.6 | Workable |
| Oct | 58 | 37 | 2.5 | Workable |
| Nov | 42 | 25 | 1.8 | Cold |
| Dec | 29 | 13 | 1.4 | Cold |
Eau Claire 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 Eau Claire is 1.05 times the national level.
For carpenters (47-2031, weighted 50%) the local median is $28.41 an hour, which is in line with the national $29.12. The middle half of them earn between $23.39 and $38.28 an hour. BLS counts 360 of them working in the area, 41.8 for every 10,000 jobs (US: 43.1), so the local bench is about average.
For cement masons and concrete finishers (47-2051, weighted 10%) the local median is $29.33 an hour, which is 7% above the national $27.41. The middle half of them earn between $23.80 and $36.87 an hour. BLS counts 210 of them working in the area, 24.4 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 $36.24 an hour, 19% above the US median of $30.38. The middle half of them earn between $29.33 and $42.73 an hour. About 350 work in the metro. That is 40.7 per 10,000 jobs, compared with 48.7 nationally, so expect fewer local crews to bid.
For plumbers, pipefitters and steamfitters (47-2152, weighted 10%) the local median is $44.58 an hour, which is 45% above the national $30.67. The middle half of them earn between $30.62 and $48.23 an hour. BLS counts 210 of them working in the area, 24.4 for every 10,000 jobs (US: 30.0), so the local bench is thinner than average.
Drywall and ceiling tile installers (47-2081), 10% of the weighting: a median of $28.47 an hour, in line with the US median of $28.33. The middle half of them earn between $23.67 and $29.82 an hour. About 40 work in the metro. That is 4.6 per 10,000 jobs, compared with 5.3 nationally, so the supply of crews looks typical.
For roofers (47-2181, weighted 10%) the local median is $24.70 an hour, which is 7% below the national $26.65. The middle half of them earn between $23.01 and $30.28 an hour. BLS counts 70 of them working in the area, 8.1 for every 10,000 jobs (US: 8.7), so the local bench is about average.
Quotes come from real crews, not medians. If the carpenters on your job are paid at the 75th percentile ($38.28 an hour) instead of the median, the labor line grows by about $6,500. At the 25th percentile ($23.39) it shrinks by about $3,300. The total moves by 11.1% or 5.7%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 86,060 jobs in the Eau Claire area. That makes it the 226th largest of the 300 metros we cover, with 0.06% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $23.39 | $28.41 | $38.28 | $29.12 | 0.98 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $23.80 | $29.33 | $36.87 | $27.41 | 1.07 | metro |
| Electricians (47-2111) | 10% | $29.33 | $36.24 | $42.73 | $30.38 | 1.19 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $30.62 | $44.58 | $48.23 | $30.67 | 1.45 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $23.67 | $28.47 | $29.82 | $28.33 | 1.00 | metro |
| Roofers (47-2181) | 10% | $23.01 | $24.70 | $30.28 | $26.65 | 0.93 | metro |
| Blended | 100% | 1.05 | |||||
Related projects, priced for Eau Claire
Because every project leans on different trades, Eau Claire's wage level does not move all prices equally. Against the US midpoint, bathroom remodel runs +5% and roof replacement −4%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $17,900 – $30,500 | −3% |
| Bathroom remodel | 45 sq ft | $4,950 – $24,500 | +5% |
| Detached garage | 576 sq ft | $28,900 – $58,000 | level |
| Roof replacement | 2,000 sq ft of roof | $5,900 – $12,000 | −4% |
How Eau Claire compares
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 $55,900 to $68,500 across Eau Claire and its five closest metros.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Eau Claire, WIthis page | $38,600 – $78,000 | $58,300 | |
| Wausau, WI75 miles | $37,000 – $74,900 | $55,900 | −4% |
| Rochester, MN85 miles | $40,600 – $82,200 | $61,400 | +5% |
| La Crosse, WI85 miles | $38,400 – $77,800 | $58,100 | level |
| Minneapolis, MN100 miles | $45,300 – $91,700 | $68,500 | +18% |
| Oshkosh, WI140 miles | $44,700 – $90,300 | $67,500 | +16% |
| Wisconsin (statewide) | $39,300 – $79,500 | $59,400 | +2% |
| United States | $38,000 – $77,000 | $57,500 | −1% |
Across 300 US metros, Eau Claire comes in at #102 from the top. The priciest is Honolulu, HI at $79,600; the cheapest is Brownsville, TX at $44,300 (midpoints, 300 sq ft). Statewide, Eau Claire is 2% below the Wisconsin figure.
Other Wisconsin metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Milwaukee, WI | 820,780 jobs | $40,500 – $81,900 | $61,200 | +5% |
| Madison, WI | 408,070 jobs | $40,200 – $81,300 | $60,700 | +4% |
| Green Bay, WI | 174,550 jobs | $39,400 – $79,600 | $59,500 | +2% |
| Appleton, WI | 124,230 jobs | $39,800 – $80,400 | $60,100 | +3% |
| Oshkosh, WI | 93,750 jobs | $44,700 – $90,300 | $67,500 | +16% |
| La Crosse, WI | 84,380 jobs | $38,400 – $77,800 | $58,100 | level |
Cities with a workforce like Eau Claire's
Big cities and small ones price differently, so here is Eau Claire against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Daphne, AL | 87,120 jobs | $32,400 – $65,800 | $49,100 | −16% |
| Jackson, TN | 84,530 jobs | $32,700 – $66,300 | $49,500 | −15% |
| Joplin, MO | 87,190 jobs | $34,300 – $69,400 | $51,900 | −11% |
| La Crosse, WI | 84,380 jobs | $38,400 – $77,800 | $58,100 | level |
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 $50,400 to $66,200 for Eau Claire, WI is attached.
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Multi-page report for Eau Claire, WI: 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 Eau Claire: your questions
+How much does it cost to build a home addition in Eau Claire?
For 300 sq ft, expect $38,600 to $78,000 in the Eau Claire area. A standard-spec job lands at $50,400 to $66,200. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in Eau Claire?
About $127 to $254 per sq ft for materials and labor, plus $460 to $1,850 for the permit if one is needed. The US range is $125 to $250.
+Is home addition cheaper in Eau Claire or Wausau?
Wausau is 75 miles away. The midpoint for 300 sq ft there is $55,900, which is 4% less than Eau Claire ($58,300). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Eau Claire?
About 69% at the midpoint, or $40,300 out of $58,300. Materials are 29% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Eau Claire?
$51,300 to $103,500. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Eau Claire?
Often, but rules are set by your city or county building office, so call before you hire. Budget $460 to $1,850 for fees in the Eau Claire area (our national range of $500 to $2,000 scaled by the local price level).
+Is Eau Claire expensive for home addition compared with the rest of Wisconsin?
Eau Claire is 2% below the Wisconsin statewide estimate ($59,400 at the midpoint). We cover 12 metros in Wisconsin; see the state page to compare them.
+What do carpenters earn in Eau Claire?
The BLS median is $28.41 an hour in the Eau Claire area, compared with $29.12 nationally. The 25th to 75th percentile range is $23.39 to $38.28.
+What do basic and premium home addition work cost in Eau Claire?
For 300 sq ft, basic work runs $38,600 to $54,400 and premium work $62,300 to $78,000. 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 Eau Claire?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are April through October. April and October 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 Eau Claire
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.