How long does an ADU permit take in Nashville?
In Nashville, the typical ADU permit took 40 days from application to issue, across 553 permits issued from September 2024 to September 2026.
The two steps
The numbers behind the chart
| Step | Median | Middle half | Permits | Permits issued |
|---|---|---|---|---|
| Application to permit issued | 40 days | 19 days to 79 days | 553 | September 2024 to September 2026 |
ADU builders with the most jobs in Nashville
| Rank | Contractor | Jobs | Contact |
|---|---|---|---|
| 1 | Palmetto Construction LLC | Get a quote | |
| 2 | Regent Homes | Get a quote | |
| 3 | Affordable Building Concepts | Get a quote |
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Permit wait by year issued
| Year issued | Jobs | Median | Middle half |
|---|---|---|---|
| 2023 | 36 | 61 days | 18 days to about 4 months |
| 2024 | 216 | 46 days | 27 days to 82 days |
| 2025 | 241 | 42 days | 21 days to 82 days |
| 2026 | 264 | 38 days | 16 days to 78 days |
Why it takes this long
- 1% of permits were issued the day they were applied for, and 41% within 30 days (553 permits).
- The time to final inspection is not shown: the city's permit data has no final inspection date.
Days are counted between the dates on each city permit: Date_Entered, Date_Issued. Median and middle half: half of the jobs took longer than the median; the middle half runs from the 25th to the 75th percentile. A figure is shown only when it rests on 30 or more permits. Kinds of work are sorted by the same rules as our contractor lists. Source: Metro Nashville Building Permits Issued (ArcGIS Building_Permits_Issued_2), read 2026-09-24. The same figures as data: adu.json.