Accessory Dwelling Unit (ADU) Construction in Chattanooga, TN — Costs $52,480 to $306,133
What does accessory dwelling unit (adu) construction cost in Chattanooga? Average $131,200, ranging $52,480–$306,133. Labor runs $26.08/hr locally — 13% below the national average. Free breakdown with material + labor split.
Chattanooga, TN Market
-13% vs nationalLabor Rate
$26.08/hr
Material Index
88
Avg Permit Cost
$702
Median Home Price
$256,543
Chattanooga is a mid-sized city in Tennessee 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. Chattanooga offers slightly below-average renovation costs, giving homeowners a small cost advantage compared to most US markets. The median home in Chattanooga is valued at $256,543, putting this project at about 51.1% of home value — a moderate investment with a projected 80% ROI.
Low Estimate
$52,480
National: $60,000
Mid-Range
$131,200
National: $150,000
High End
$306,133
National: $350,000
Per Sq Ft
$219
National: $250
Accessory Dwelling Unit (ADU) Construction Cost Calculator for Chattanooga
Adjusted for Chattanooga's labor rate ($26.08/hr) and material costs (index 88).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Chattanooga
$131,200
Based on 200 sq ft at mid quality, adjusted for Chattanooga market rates.
Local Cost Breakdown
At Chattanooga's average rate of $26.08/hr (13% below national avg)
Material cost index 88 (12% below national baseline of 100)
Accessory Dwelling Unit (ADU) Construction vs. Home Value in Chattanooga
| Metric | Chattanooga | National Avg |
|---|---|---|
| Accessory Dwelling Unit (ADU) Construction (Mid-Range) | $131,200 | $150,000 |
| Median Home Price | $256,543 | $350,000 |
| Project as % of Home Value | 51.1% | 42.9% |
| Estimated ROI | 80% | 80% |
| Median Household Income | $54,700 | $75,000 |
What Affects the Price in Chattanooga
- 1Local labor rates ($26.08/hr in Chattanooga)
- 2Material cost index (88 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 Chattanooga, TN
Second Story Addition
$174,933
Room Addition
$78,720
Swimming Pool Installation
$56,923
Garage Addition
$48,107
Home Addition
$70,016
Inground Swimming Pool
$56,957
Attic Conversion
$48,077
Swimming Pool Construction
$43,707
Accessory Dwelling Unit (ADU) Construction in Other Tennessee Cities
Planning a Accessory Dwelling Unit (ADU) Construction in Chattanooga
Building permits are typically required for a accessory dwelling unit (adu) construction in Chattanooga. The average permit fee in this area is $702, 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 Chattanooga, skilled contractors charge an average of $26.08/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
For the median Chattanooga household earning $54,700/year, this project at $131,200 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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