Accessory Dwelling Unit (ADU) Construction in Dayton, OH — Costs $55,510 to $323,808
What does accessory dwelling unit (adu) construction cost in Dayton? Average $138,775, ranging $55,510–$323,808. Labor runs $28.21/hr locally — 7% below the national average. Free breakdown with material + labor split.
Dayton, OH Market
-7% vs nationalLabor Rate
$28.21/hr
Material Index
91
Avg Permit Cost
$962
Median Home Price
$178,272
Dayton is a mid-sized city in Ohio with a healthy pool of local contractors. Homeowners generally have several options to compare for a accessory dwelling unit (adu) construction, which helps keep pricing competitive. Dayton offers slightly below-average renovation costs, giving homeowners a small cost advantage compared to most US markets. At a median home price of $178,272, homeowners in Dayton should weigh the project cost (77.8% of home value) carefully against expected returns to avoid over-improving for the local market.
Low Estimate
$55,510
National: $60,000
Mid-Range
$138,775
National: $150,000
High End
$323,808
National: $350,000
Per Sq Ft
$231
National: $250
Accessory Dwelling Unit (ADU) Construction Cost Calculator for Dayton
Adjusted for Dayton's labor rate ($28.21/hr) and material costs (index 91).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Dayton
$138,775
Based on 200 sq ft at mid quality, adjusted for Dayton market rates.
Local Cost Breakdown
At Dayton's average rate of $28.21/hr (6% below national avg)
Material cost index 91 (9% below national baseline of 100)
Accessory Dwelling Unit (ADU) Construction vs. Home Value in Dayton
| Metric | Dayton | National Avg |
|---|---|---|
| Accessory Dwelling Unit (ADU) Construction (Mid-Range) | $138,775 | $150,000 |
| Median Home Price | $178,272 | $350,000 |
| Project as % of Home Value | 77.8% | 42.9% |
| Estimated ROI | 80% | 80% |
| Median Household Income | $59,480 | $75,000 |
What Affects the Price in Dayton
- 1Local labor rates ($28.21/hr in Dayton)
- 2Material cost index (91 vs national 100)
- 3Attached vs detached
- 4Size and bedroom count
- 5Kitchen and bath quality
- 6Local ADU regulations
Popular Upgrades
- Full kitchen
- Separate entrance
- Solar panels for energy independence
Other Projects in Dayton, OH
Second Story Addition
$185,033
Room Addition
$83,265
Swimming Pool Installation
$59,939
Garage Addition
$50,884
Home Addition
$73,892
Inground Swimming Pool
$59,840
Attic Conversion
$50,968
Swimming Pool Construction
$46,334
Accessory Dwelling Unit (ADU) Construction in Other Ohio Cities
Planning a Accessory Dwelling Unit (ADU) Construction in Dayton
Building permits are typically required for a accessory dwelling unit (adu) construction in Dayton. The average permit fee in this area is $962, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 6-18 months from start to finish.
A accessory dwelling unit (adu) construction is a complex project best left to licensed professionals. In Dayton, skilled contractors charge an average of $28.21/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
For the median Dayton household earning $59,480/year, this project at $138,775 represents a significant investment. Consider financing options or phasing the work to spread costs over time.
Accessory Dwelling Unit (ADU) Construction — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
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