Do you need an HVAC permit in Tennessee?
By Mario Bailey Last checked
- Always required
- 3
- of 3 jurisdictions
- Conditional
- 0
- depends on size or scope
- Not required
- 0
- exempt outright
HVAC Permit rules nationwide, beyond Tennessee.
Requirements and size thresholds for HVAC permits vary by locality. The table below compares what each Tennessee county or city requires. Always confirm with the local office before starting.
Comparing states? See HVAC permit rules across every locality we cover.
What to know about HVAC permits in Tennessee
HVAC permits in Virginia typically apply to new installations and to replacing gas or oil fueled equipment. Costs vary with equipment type and your locality. Using a licensed mechanical contractor matters, because the install must meet code and pass inspection, which also helps protect your equipment warranty.
The application steps and inspection sequence for HVAC permits come from the model code rather than from Tennessee law, so they read the same wherever you build. We keep that walkthrough in one place: how an HVAC permit application and its inspections work, start to finish. What changes between Tennessee jurisdictions is below: who requires a permit, what they charge, and which office you file with.
Swipe sideways to see thresholds and confidence.
| Locality | Permit required? | Typical threshold | Confidence |
|---|---|---|---|
| Memphis | Yes | Not specified | Confirmed on official page |
| Nashville | Yes | Not specified | Confirmed on official page |
| Williamson County | Yes | Not specified | From an official source |
| No localities match your filter. | |||
What an HVAC permit costs in Tennessee
3 Tennessee jurisdictions we cover publish a fee figure for this work. Each line is quoted from that office's own schedule and linked to its citation. The figures are not comparable to one another: some are flat minimums, some a percentage of job value, some charged per fixture, so what you pay depends on which schedule applies and on your job's valuation.
M-0 fee issuance cost per permit $20.00, M-3.1 fee for the first $1,000 valuation $15.00 then $8.00 for each additional $1,000 under $1,000,000, M-4 minimum permit fee $15.00, and M-3.2.1 SINGLE FAMILY RESIDENTS ONLY, mechanical permit fees shall be based on total valuation (contract price) based on a minimum $1,000.00 per ton, per the 2022 Fee Schedule, Mechanical Permit and Inspection Fees Schedule. Work commencing before permit issuance is charged double fee. All fees exclude an administrative charge of $4.00 and a residential surcharge of $1.00, so $5.00 is added to the residential total, per the 2022 Fee Schedule.
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Flat minimum of $75 per gas/mechanical permit plus $32 per 100,000 Btuh or fraction for heating and cooling equipment, per Metro Code 16.16.400 in the Codes fee schedule (Dec 2025)
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Mechanical Permit Fee Schedule: $10.00 permit fee plus $10.00 for the first $1,000 of valuation and $2.00 for each additional $1,000; repair, replacement, or addition permits are $5.00 plus $2.00 for each additional $1,000 of valuation (Schedule of Building Permit Fees).
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Jurisdictions not listed publish no dollar figure we could quote. Absence does not mean a permit is free.
Common questions about HVAC permits in Tennessee
- Do I need an HVAC permit in Tennessee?
- In most of Tennessee, yes. Permits are issued locally, so the answer comes from your Tennessee city or county rather than a single statewide rule. Of the 3 Tennessee jurisdictions we have verified for HVAC work, 3 require a permit outright, 0 depend on the size or scope of the job, and 0 require none.
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