Accessory Dwelling Unit (ADU) Construction in Franklin, TN — Costs $79,730 to $465,092
What does accessory dwelling unit (adu) construction cost in Franklin? Average $199,325, ranging $79,730–$465,092. Labor runs $44.03/hr locally — 33% above the national average. Free breakdown with material + labor split.
Franklin, TN Market
+33% vs nationalLabor Rate
$44.03/hr
Material Index
119
Avg Permit Cost
$1,510
Median Home Price
$620,000
In a smaller market like Franklin, Tennessee, the pool of contractors specializing in accessory dwelling unit (adu) construction may be more limited. Getting 3+ quotes is especially important to ensure fair pricing. At 33% above the national average, Franklin is one of the more expensive markets for home improvement — driven primarily by above-average labor rates in the region. With a median home price of $620,000, this accessory dwelling unit (adu) construction represents just 32.1% of typical home value — a relatively small investment that can significantly boost curb appeal or functionality.
Low Estimate
$79,730
National: $60,000
Mid-Range
$199,325
National: $150,000
High End
$465,092
National: $350,000
Per Sq Ft
$332
National: $250
Accessory Dwelling Unit (ADU) Construction Cost Calculator for Franklin
Adjusted for Franklin's labor rate ($44.03/hr) and material costs (index 119).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Franklin
$199,325
Based on 200 sq ft at mid quality, adjusted for Franklin market rates.
Local Cost Breakdown
At Franklin's average rate of $44.03/hr (47% above national avg)
Material cost index 119 (19% above national baseline of 100)
Accessory Dwelling Unit (ADU) Construction vs. Home Value in Franklin
| Metric | Franklin | National Avg |
|---|---|---|
| Accessory Dwelling Unit (ADU) Construction (Mid-Range) | $199,325 | $150,000 |
| Median Home Price | $620,000 | $350,000 |
| Project as % of Home Value | 32.1% | 42.9% |
| Estimated ROI | 80% | 80% |
| Median Household Income | $98,000 | $75,000 |
What Affects the Price in Franklin
- 1Local labor rates ($44.03/hr in Franklin)
- 2Material cost index (119 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 Franklin, TN
Second Story Addition
$265,767
Room Addition
$119,595
Swimming Pool Installation
$84,569
Garage Addition
$73,086
Home Addition
$105,196
Inground Swimming Pool
$83,667
Attic Conversion
$73,849
Swimming Pool Construction
$67,136
Accessory Dwelling Unit (ADU) Construction in Other Tennessee Cities
Nashville, TN
$142,100
Memphis, TN
$132,425
Knoxville, TN
$146,650
Chattanooga, TN
$131,200
Clarksville, TN
$148,100
Murfreesboro, TN
$145,825
Johnson City, TN
$161,850
Jackson, TN
$158,225
Planning a Accessory Dwelling Unit (ADU) Construction in Franklin
Building permits are typically required for a accessory dwelling unit (adu) construction in Franklin. The average permit fee in this area is $1,510, 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 Franklin, skilled contractors charge an average of $44.03/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
With a median household income of $98,000, many Franklin residents can budget for this project through savings. The mid-range cost of $199,325 represents 203% of the typical household's annual income.
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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