Home addition cost in Dayton, OH
Local estimate from BLS wage data and BEA price levels. Reviewed Nov 4, 2026.
- Typical range (300 sq ft)
- $36,800 – $74,600
- Per sq ft
- $121 – $242
- before permit
- Versus US midpoint
- −3%
- US $57,500
- Rank of 300 metros
- #134
- 1 = most expensive
Dayton homeowners pay roughly $36,800 to $74,600 to build a home addition at 300 sq ft, or $121 to $242 per sq ft (permit not included). Against the US midpoint, Dayton is 3% lower. Building materials run about 6% below the US average here (BEA goods price index 93.6).
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 Dayton, OH, standard level
$48,100 to $63,200
About $158 to $206 per sq ft before permits. Labor is about 68% of the bill.
| Part | Low | High |
|---|---|---|
| Materials | $14,600 | $19,100 |
| Labor | $32,600 | $42,700 |
| Permits and fees | $880 | $1,450 |
| Total | $48,100 | $63,200 |
Cost breakdown for 300 sq ft in Dayton, OH
| Part of the job | Low | Midpoint | High | Share |
|---|---|---|---|---|
| Materials | $11,200 | $16,900 | $22,500 | 30% |
| Labor | $25,100 | $37,700 | $50,200 | 68% |
| Permits and fees | $460 | $1,150 | $1,850 | 2% |
| Total | $36,800 | $55,700 | $74,600 | 100% |
Where the Dayton price comes from
Labor is 68% 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 Dayton the blended ratio comes out at 0.98.
On the materials line, the BEA goods price index for the Dayton metro is 93.6 (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 (92.7) and land at $460 to $1,850.
What nearby projects cost in Dayton
Because every project leans on different trades, Dayton's wage level does not move all prices equally. Against the US midpoint, detached garage runs −3% and bathroom remodel −6%.
| Project | Size | Range | vs. US |
|---|---|---|---|
| Kitchen remodel | 120 sq ft | $17,400 – $29,600 | −6% |
| Bathroom remodel | 45 sq ft | $4,400 – $21,900 | −6% |
| Detached garage | 576 sq ft | $28,200 – $56,600 | −3% |
| Roof replacement | 2,000 sq ft of roof | $5,800 – $11,800 | −5% |
Local wages behind the labor line
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 Dayton is 0.98 times the national level.
For carpenters (47-2031, weighted 50%) the local median is $28.04 an hour, which is 4% below the national $29.12. The middle half of them earn between $23.03 and $31.60 an hour. BLS counts 950 of them working in the area, 25.5 for every 10,000 jobs (US: 43.1), so the local bench is thinner than average.
For cement masons and concrete finishers (47-2051, weighted 10%) the local median is $30.09 an hour, which is 10% above the national $27.41. The middle half of them earn between $23.64 and $37.19 an hour. BLS counts 260 of them working in the area, 7.0 for every 10,000 jobs (US: 13.3), so the local bench is thinner than average.
Electricians (47-2111), 10% of the weighting: a median of $29.75 an hour, in line with the US median of $30.38. The middle half of them earn between $23.38 and $37.96 an hour. About 1,920 work in the metro. That is 51.5 per 10,000 jobs, compared with 48.7 nationally, so the supply of crews looks typical.
For plumbers, pipefitters and steamfitters (47-2152, weighted 10%) the local median is $30.26 an hour, which is in line with the national $30.67. The middle half of them earn between $24.34 and $39.16 an hour. BLS counts 1,130 of them working in the area, 30.3 for every 10,000 jobs (US: 30.0), so the local bench is about average.
Drywall and ceiling tile installers (47-2081), 10% of the weighting: a median of $29.53 an hour, 4% above the US median of $28.33. The middle half of them earn between $23.18 and $34.00 an hour. About 200 work in the metro. That is 5.4 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 $24.72 an hour, which is 7% below the national $26.65. The middle half of them earn between $22.20 and $29.78 an hour. BLS counts 320 of them working in the area, 8.6 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 ($31.60 an hour) instead of the median, the labor line grows by about $2,350. At the 25th percentile ($23.03) it shrinks by about $3,300. The total moves by 4.2% or 5.9%, so wages alone rarely explain a quote that is far outside our range.
For context on the local economy, BLS counts 372,660 jobs in the Dayton-Kettering-Beavercreek area. That makes it the 70th largest of the 300 metros we cover, with 0.24% of US employment.
| Trade | Weight | 25th pct | Median | 75th pct | US median | Ratio | Level used |
|---|---|---|---|---|---|---|---|
| Carpenters (47-2031) | 50% | $23.03 | $28.04 | $31.60 | $29.12 | 0.96 | metro |
| Cement masons and concrete finishers (47-2051) | 10% | $23.64 | $30.09 | $37.19 | $27.41 | 1.10 | metro |
| Electricians (47-2111) | 10% | $23.38 | $29.75 | $37.96 | $30.38 | 0.98 | metro |
| Plumbers, pipefitters and steamfitters (47-2152) | 10% | $24.34 | $30.26 | $39.16 | $30.67 | 0.99 | metro |
| Drywall and ceiling tile installers (47-2081) | 10% | $23.18 | $29.53 | $34.00 | $28.33 | 1.04 | metro |
| Roofers (47-2181) | 10% | $22.20 | $24.72 | $29.78 | $26.65 | 0.93 | metro |
| Blended | 100% | 0.98 | |||||
How Dayton compares
Same job, same size (300 sq ft), priced for the nearest metros. Indianapolis is the priciest of the group at $59,000. Lexington is the cheapest at $51,900.
| Area | Range | Midpoint | vs. here |
|---|---|---|---|
| Dayton, OHthis page | $36,800 – $74,600 | $55,700 | |
| Cincinnati, OH55 miles | $37,000 – $75,000 | $56,000 | +1% |
| Columbus, OH70 miles | $38,900 – $78,700 | $58,800 | +6% |
| Fort Wayne, IN100 miles | $37,600 – $76,000 | $56,800 | +2% |
| Indianapolis, IN105 miles | $39,000 – $79,000 | $59,000 | +6% |
| Lexington, KY120 miles | $34,300 – $69,500 | $51,900 | −7% |
| Ohio (statewide) | $37,400 – $75,700 | $56,600 | +2% |
| United States | $38,000 – $77,000 | $57,500 | +3% |
Across 300 US metros, Dayton comes in at #134 from the top. The priciest is Honolulu, HI at $79,600; the cheapest is Brownsville, TX at $44,300 (midpoints, 300 sq ft). Statewide, Dayton is 2% below the Ohio figure.
Other Ohio metros
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Columbus, OH | 1,105,580 jobs | $38,900 – $78,700 | $58,800 | +6% |
| Cincinnati, OH | 1,101,030 jobs | $37,000 – $75,000 | $56,000 | +1% |
| Cleveland, OH | 1,031,130 jobs | $38,100 – $77,100 | $57,600 | +3% |
| Akron, OH | 319,560 jobs | $38,500 – $77,900 | $58,200 | +4% |
| Toledo, OH | 291,530 jobs | $38,400 – $77,700 | $58,100 | +4% |
| Canton, OH | 163,080 jobs | $36,600 – $74,200 | $55,400 | level |
Cities with a workforce like Dayton's
Big cities and small ones price differently, so here is Dayton against the 4 metros with the closest total employment.
| Metro | Size | Range | Midpoint | vs. here |
|---|---|---|---|---|
| Allentown, PA | 377,180 jobs | $38,500 – $78,100 | $58,300 | +5% |
| Greensboro, NC | 365,410 jobs | $33,700 – $68,400 | $51,100 | −8% |
| Tucson, AZ | 389,630 jobs | $33,800 – $68,600 | $51,200 | −8% |
| Little Rock, AR | 358,210 jobs | $31,900 – $64,600 | $48,300 | −13% |
Specs and site conditions that change a Dayton bid
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.
When to schedule home addition in Dayton
We use NOAA's 1991-2020 climate normals for Dayton Mcd (5 miles from the city center). These are 30-year monthly averages, not forecasts.
April through November is the stretch where digging, grading and setting material in the ground runs into the fewest weather problems in Dayton (8 of 12 months). January, February, March and December have an average overnight low at or below freezing (32°F).
In January, February, March 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 107 days a year with a low at or below 32°F at this station.
Dayton gets about 42 inches of precipitation in a normal year, including roughly 12 inches of snow. The wettest months are April, May and June (4.5 inches in April). Inside the workable window, September and October are the driest, at 3.0 and 3.0 inches. The station averages about 39 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 | 20 | 3.2 | Cold |
| Feb | 40 | 23 | 2.4 | Cold |
| Mar | 51 | 31 | 3.5 | Cold |
| Apr | 64 | 41 | 4.5 | Workable |
| May | 75 | 53 | 4.4 | Workable |
| Jun | 84 | 62 | 4.4 | Workable |
| Jul | 87 | 66 | 4.0 | Workable |
| Aug | 86 | 64 | 3.1 | Workable |
| Sep | 79 | 56 | 3.0 | Workable |
| Oct | 66 | 44 | 3.0 | Workable |
| Nov | 52 | 33 | 3.0 | Workable |
| Dec | 41 | 26 | 3.1 | Cold |
Dayton: what basic, standard and premium work costs
Three bands are cut from the same cited range and localized for Dayton 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
$36,800 to $51,900
Bump-out or simple room without plumbing
Standard
$48,100 to $63,200
Standard room addition with HVAC and electrical
Premium
$59,500 to $74,600
Large addition with bath or kitchen and a new foundation
| Size | Basic | Standard | Premium |
|---|---|---|---|
| bump-out (100 sq ft) | $12,600 – $18,000 | $16,600 – $22,000 | $20,700 – $26,100 |
| 20x20 room (400 sq ft) | $48,900 – $68,900 | $63,900 – $83,800 | $78,800 – $98,800 |
| large suite (600 sq ft) | $73,200 – $103,000 | $95,400 – $125,000 | $117,500 – $147,000 |
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 $48,100 to $63,200 for Dayton, OH is attached.
A detailed PDF report of this estimate, $9
The report lays out the home addition numbers for Dayton, OH line by line, with the local wage and price inputs, permit and timing notes, a quote comparison sheet and the full method. 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 Dayton: your questions
+How much does it cost to build a home addition in Dayton?
For 300 sq ft, expect $36,800 to $74,600 in the Dayton area. A standard-spec job lands at $48,100 to $63,200. Small jobs usually cost more per sq ft and large ones less.
+What is the price per sq ft for home addition in Dayton?
About $121 to $242 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 Dayton or Cincinnati?
Cincinnati is 55 miles away. The midpoint for 300 sq ft there is $56,000, which is 1% more than Dayton ($55,700). Wage and materials indexes both feed that gap.
+How much of the bill is labor in Dayton?
About 68% at the midpoint, or $37,700 out of $55,700. Materials are 30% and permits 2%. Nationally, labor is 67%.
+What would 20x20 room (400 sq ft) cost in Dayton?
$48,900 to $98,800. Pick a different size in the estimator above to get your own number.
+Does home addition need a permit in Dayton?
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 Dayton area (our national range of $500 to $2,000 scaled by the local price level).
+Is Dayton expensive for home addition compared with the rest of Ohio?
Dayton is 2% below the Ohio statewide estimate ($56,600 at the midpoint). We cover 8 metros in Ohio; see the state page to compare them.
+What do carpenters earn in Dayton?
The BLS median is $28.04 an hour in the Dayton area, compared with $29.12 nationally. The 25th to 75th percentile range is $23.03 to $31.60.
+What do basic and premium home addition work cost in Dayton?
For 300 sq ft, basic work runs $36,800 to $51,900 and premium work $59,500 to $74,600. 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 Dayton?
Based on NOAA 1991-2020 normals, the comfortable months for this kind of work are April through November. September 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 Dayton
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.