Accessory Dwelling Unit (ADU) Construction in Knoxville, TN — Costs $58,660 to $342,183
What does accessory dwelling unit (adu) construction cost in Knoxville? Average $146,650, ranging $58,660–$342,183. Labor runs $29.86/hr locally — 2% below the national average. Free breakdown with material + labor split.
Knoxville, TN Market
-2% vs nationalLabor Rate
$29.86/hr
Material Index
96
Avg Permit Cost
$982
Median Home Price
$247,979
Knoxville 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. Knoxville offers slightly below-average renovation costs, giving homeowners a small cost advantage compared to most US markets. At a median home price of $247,979, homeowners in Knoxville should weigh the project cost (59.1% of home value) carefully against expected returns to avoid over-improving for the local market.
Low Estimate
$58,660
National: $60,000
Mid-Range
$146,650
National: $150,000
High End
$342,183
National: $350,000
Per Sq Ft
$244
National: $250
Accessory Dwelling Unit (ADU) Construction Cost Calculator for Knoxville
Adjusted for Knoxville's labor rate ($29.86/hr) and material costs (index 96).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Knoxville
$146,650
Based on 200 sq ft at mid quality, adjusted for Knoxville market rates.
Local Cost Breakdown
At Knoxville's average rate of $29.86/hr (0% below national avg)
Material cost index 96 (4% below national baseline of 100)
Accessory Dwelling Unit (ADU) Construction vs. Home Value in Knoxville
| Metric | Knoxville | National Avg |
|---|---|---|
| Accessory Dwelling Unit (ADU) Construction (Mid-Range) | $146,650 | $150,000 |
| Median Home Price | $247,979 | $350,000 |
| Project as % of Home Value | 59.1% | 42.9% |
| Estimated ROI | 80% | 80% |
| Median Household Income | $58,880 | $75,000 |
What Affects the Price in Knoxville
- 1Local labor rates ($29.86/hr in Knoxville)
- 2Material cost index (96 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 Knoxville, TN
Second Story Addition
$195,533
Room Addition
$87,990
Swimming Pool Installation
$63,319
Garage Addition
$53,772
Home Addition
$78,072
Inground Swimming Pool
$63,204
Attic Conversion
$53,869
Swimming Pool Construction
$48,972
Accessory Dwelling Unit (ADU) Construction in Other Tennessee Cities
Planning a Accessory Dwelling Unit (ADU) Construction in Knoxville
Building permits are typically required for a accessory dwelling unit (adu) construction in Knoxville. The average permit fee in this area is $982, 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 Knoxville, skilled contractors charge an average of $29.86/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
For the median Knoxville household earning $58,880/year, this project at $146,650 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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