Home addition cost in Oshkosh, WI
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $44,700 – $90,300
- Per sq ft
- $147 – $295
- before permit
- Versus US midpoint
- +17%
- US $57,500
- Rank of 300 metros
- #15
- 1 = most expensive
A home addition in Oshkosh, WI usually costs $44,700 to $90,300 for 300 sq ft. That works out to about $147 to $295 per sq ft before permits. Compared with the national midpoint that is $10,000 more. Carpenters earn a median of $40.59 an hour in the Oshkosh area, 39% above the US median of $29.12.
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Estimated cost for 300 sq ft in Oshkosh, WI, standard level
$58,400 to $76,600
About $192 to $251 per sq ft before permits. Labor is about 73% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $14,600 | $19,100 |
| Labor | $42,800 | $56,000 |
| Permits and fees | $880 | $1,450 |
| Total | $58,400 | $76,600 |
Cost breakdown for 300 sq ft in Oshkosh, WI
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,300 | $16,900 | $22,500 | 25% |
| Labor | $33,000 | $49,400 | $65,900 | 73% |
| Permits and fees | $460 | $1,150 | $1,850 | 2% |
| Total | $44,700 | $67,500 | $90,300 | 100% |
What is behind the Oshkosh number
Labor is 73% of the midpoint bill here, against 67% nationally. The mix of trades behind this job is carpenters (50%), cement masons and concrete finishers (10%), electricians (10%), plumbers, pipefitters and steamfitters (10%), drywall and ceiling tile installers (10%), roofers (10%). We weight each trade's local median wage by that share and compare it with the national median. In Oshkosh the blended ratio comes out at 1.29.
Materials are scaled with BEA's regional price parity for goods. Oshkosh is at 93.8 against 100 for the US, so a materials line of $18,000 nationally becomes $16,900 here (midpoint, 300 sq ft). Permits follow the all-items index of 92.9: $460 to $1,850.
Data note: 10% of the labor weighting for this project uses a statewide median because BLS has no published metro figure for that trade in Oshkosh. The wage table below marks each row.
Why two Oshkosh 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.
How Oshkosh compares
Of the five closest metros, all are cheaper than Oshkosh. Wausau is the lowest at about $55,900 (midpoint, 300 sq ft), 80 miles away.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Oshkosh, WIthis page | $44,700 – $90,300 | $67,500 | |
| Appleton, WI20 miles | $39,800 – $80,400 | $60,100 | −11% |
| Green Bay, WI45 miles | $39,400 – $79,600 | $59,500 | −12% |
| Sheboygan, WI50 miles | $40,100 – $81,100 | $60,600 | −10% |
| Wausau, WI80 miles | $37,000 – $74,900 | $55,900 | −17% |
| Madison, WI85 miles | $40,200 – $81,300 | $60,700 | −10% |
| Wisconsin (statewide) | $39,300 – $79,500 | $59,400 | −12% |
| United States | $38,000 – $77,000 | $57,500 | −15% |
Out of the 300 metros we cover, Oshkosh ranks #15 for the cost of this job (#1 is the most expensive). Statewide, Oshkosh is 14% above the Wisconsin figure.
Elsewhere in Wisconsin
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Milwaukee, WI | 820,780 jobs | $40,500 – $81,900 | $61,200 | −9% |
| Madison, WI | 408,070 jobs | $40,200 – $81,300 | $60,700 | −10% |
| Green Bay, WI | 174,550 jobs | $39,400 – $79,600 | $59,500 | −12% |
| Appleton, WI | 124,230 jobs | $39,800 – $80,400 | $60,100 | −11% |
| Eau Claire, WI | 86,060 jobs | $38,600 – $78,000 | $58,300 | −14% |
| La Crosse, WI | 84,380 jobs | $38,400 – $77,800 | $58,100 | −14% |
Metros of a similar size
Big cities and small ones price differently, so here is Oshkosh against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Iowa City, IA | 93,760 jobs | $34,100 – $69,000 | $51,600 | −24% |
| Bremerton, WA | 93,740 jobs | $42,400 – $85,800 | $64,100 | −5% |
| Billings, MT | 93,800 jobs | $38,700 – $78,400 | $58,600 | −13% |
| Bellingham, WA | 91,390 jobs | $45,500 – $92,000 | $68,800 | +2% |
Oshkosh weather and the home addition calendar
Climate numbers on this page come from NOAA's 1991-2020 U.S. Climate Normals at the nearest suitable station, Oshkosh (in the city). They are 30-year averages, so any one year can run hotter, colder or wetter.
For digging, grading and setting material in the ground, the comfortable months in Oshkosh are April through October: 7 of 12. Outside them, 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 143 days a year with a low at or below 32°F at this station.
Oshkosh gets about 33 inches of precipitation in a normal year, including roughly 39 inches of snow. The wettest months are May, June and July (4.8 inches in June). Inside the workable window, April and October are the driest, at 3.2 and 2.9 inches. The station averages about 8 days a year at 90°F or above.
We do not adjust the estimate by month, because we have no reliable published data on seasonal pricing. It is still worth asking contractors whether an off-peak start date changes their bid.
| Month | Avg high °F | Avg low °F | Precip (in) | For this job |
|---|---|---|---|---|
| Jan | 26 | 10 | 1.3 | Cold |
| Feb | 30 | 13 | 1.1 | Cold |
| Mar | 41 | 24 | 1.9 | Cold |
| Apr | 54 | 36 | 3.2 | Workable |
| May | 67 | 48 | 3.9 | Workable |
| Jun | 77 | 59 | 4.8 | Workable |
| Jul | 82 | 63 | 3.8 | Workable |
| Aug | 80 | 61 | 3.4 | Workable |
| Sep | 73 | 53 | 3.3 | Workable |
| Oct | 59 | 41 | 2.9 | Workable |
| Nov | 44 | 29 | 2.0 | Cold |
| Dec | 32 | 18 | 1.6 | Cold |
Related projects, priced for Oshkosh
Jobs that often go together with home addition are priced below at their usual sizes, using the same Oshkosh wage and price inputs. Compared with national midpoints, detached garage comes out highest (+10%) and kitchen remodel lowest (+1%); the gap comes from the trades each job uses.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $18,600 – $31,700 | +1% |
| Bathroom remodel | 45 sq ft | $5,100 – $25,400 | +9% |
| Detached garage | 576 sq ft | $31,900 – $64,000 | +10% |
| Roof replacement | 2,000 sq ft of roof | $6,300 – $12,600 | +2% |
What local crews earn in Oshkosh
The labor line is built from BLS wage data, one trade at a time. This job draws on 6 trades. We compare each trade's local median with the US median, weight the ratios by how much of the job each trade does, and apply the blend to the national labor cost. For Oshkosh the blend is 1.29.
Carpenters (47-2031), 50% of the weighting: a median of $40.59 an hour, 39% above the US median of $29.12. The middle half of them earn between $29.01 and $41.48 an hour. About 650 work in the metro. That is 69.3 per 10,000 jobs, compared with 43.1 nationally, which suggests plenty of local crews to bid.
Cement masons and concrete finishers (47-2051), 10% of the weighting: a median of $35.72 an hour, 30% above the US median of $27.41. The middle half of them earn between $27.34 and $44.45 an hour. About 110 work in the metro. That is 11.7 per 10,000 jobs, compared with 13.3 nationally, so the supply of crews looks typical.
For electricians (47-2111, weighted 10%) the local median is $37.06 an hour, which is 22% above the national $30.38. The middle half of them earn between $29.27 and $46.63 an hour. BLS counts 810 of them working in the area, 86.4 for every 10,000 jobs (US: 48.7), so the local bench is deeper than average.
Plumbers, pipefitters and steamfitters (47-2152), 10% of the weighting: a median of $41.50 an hour, 35% above the US median of $30.67. The middle half of them earn between $33.32 and $51.67 an hour. About 230 work in the metro. That is 24.5 per 10,000 jobs, compared with 30.0 nationally, so expect fewer local crews to bid.
Drywall and ceiling tile installers (47-2081) carry 10% of the labor weighting. BLS does not publish this trade for the Oshkosh metro, so we used the Wisconsin statewide median: $28.83 an hour against $28.33 for the US. The middle half of them earn between $23.05 and $33.42 an hour.
Roofers (47-2181), 10% of the weighting: a median of $28.31 an hour, 6% above the US median of $26.65. The middle half of them earn between $22.93 and $30.44 an hour. About 80 work in the metro. That is 8.5 per 10,000 jobs, compared with 8.7 nationally, so the supply of crews looks typical.
A quick sensitivity check: moving the lead trade (carpenters) from the median to the 75th percentile wage adds about $580 to the midpoint estimate; the 25th percentile takes off about $7,600. That is a swing of roughly 11.3% to 0.9% of the total, which is useful for judging whether a bid reflects wages or something else, such as scope or margin.
Oshkosh-Neenah has 93,750 jobs in total (BLS, May 2025), ranking 215th by size among the 300 metros on this site.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $29.01 | $40.59 | $41.48 | $29.12 | 1.39 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $27.34 | $35.72 | $44.45 | $27.41 | 1.30 | metro |
| Electricians (47-2111) | 10% | $29.27 | $37.06 | $46.63 | $30.38 | 1.22 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $33.32 | $41.50 | $51.67 | $30.67 | 1.35 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $23.05 | $28.83 | $33.42 | $28.33 | 1.02 | state |
| Roofers (47-2181) | 10% | $22.93 | $28.31 | $30.44 | $26.65 | 1.06 | metro |
| Blended | 100% | 1.29 | |||||
Oshkosh: what basic, standard and premium work costs
The cited range is split into basic, standard and premium bands, then scaled to Oshkosh. Bands overlap, because plenty of standard jobs cost as much as a light premium one. Sizes run from bump-out (100 sq ft) to large suite (600 sq ft).
Basic
$44,700 to $62,900
Bump-out or simple room without plumbing
Standard
$58,400 to $76,600
Standard room addition with HVAC and electrical
Premium
$72,000 to $90,300
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $15,200 – $21,700 | $20,000 – $26,500 | $24,900 – $31,300 |
| 20x20 room (400 sq ft) | $59,400 – $83,600 | $77,500 – $101,500 | $95,600 – $120,000 |
| large suite (600 sq ft) | $88,900 – $125,000 | $116,000 – $152,000 | $143,000 – $178,500 |
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Home addition in Oshkosh: your questions
+How much does it cost to build a home addition in Oshkosh?
For 300 sq ft, expect $44,700 to $90,300 in the Oshkosh area. A standard-spec job lands at $58,400 to $76,600. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in Oshkosh?
About $147 to $295 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 Oshkosh or Appleton?
Appleton is 20 miles away. The midpoint for 300 sq ft there is $60,100, which is 11% less than Oshkosh ($67,500). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Oshkosh?
About 73% at the midpoint, or $49,400 out of $67,500. Materials are 25% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Oshkosh?
$59,400 to $120,000. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Oshkosh?
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 Oshkosh area (our national range of $500 to $2,000 scaled by the local price level).
+Is Oshkosh expensive for home addition compared with the rest of Wisconsin?
Oshkosh is 14% above 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 Oshkosh?
The BLS median is $40.59 an hour in the Oshkosh area, compared with $29.12 nationally. The 25th to 75th percentile range is $29.01 to $41.48.
+What do basic and premium home addition work cost in Oshkosh?
For 300 sq ft, basic work runs $44,700 to $62,900 and premium work $72,000 to $90,300. 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 Oshkosh?
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 Oshkosh
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.