HVAC / Furnace Permit Requirements in Florence, AL
County seat of Lauderdale County. Slug is florence-al to avoid conflict with Florence in other states. Alabama adopted 2021 IBC/IRC effective April 2025.
When you DO need a permit
Replacing an HVAC system requires a mechanical permit.
Estimated fee: $56 – $187
Typical timeline: 5 business days
Source: City of Florence / Lauderdale County / AL IRC 2021
Installing a different HVAC system requires mechanical and electrical permits.
Estimated fee: $112 – $375
Typical timeline: About 2 weeks
Source: City of Florence / Lauderdale County / AL IRC 2021
Modifying ductwork requires a mechanical permit.
Estimated fee: $56 – $187
Typical timeline: 5 business days
Source: City of Florence / Lauderdale County / AL IRC 2021
Adding central AC or a mini-split requires mechanical and electrical permits.
Estimated fee: $56 – $187
Typical timeline: 5 business days
Source: City of Florence / Lauderdale County / AL IRC 2021
HVAC / Furnace Permit Costs: Florence vs. Nearby
Florence comes in on the low side for Alabama. You're looking at $56 – $375 here, compared to the state average of $78 – $260.
| City | Estimated Fee |
|---|---|
| Florence | $56 – $375 |
| Huntsville | $75 – $250 |
| Huntsville | $150 – $500 |
| Huntsville | $75 – $250 |
Fees shown are estimates based on local building code data. Actual fees may vary based on project scope and valuation.
Zoning & HOA Considerations
If you live in an HOA community: some HOAs regulate outdoor HVAC equipment placement and noise levels. Exterior condenser units, mini-split heads, and equipment pads may require screening or placement approval.
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Frequently Asked Questions
Estimated permit fees for HVAC / Furnace projects in Florence, AL range from $56 – $187. Fees vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller HVAC / Furnace projects may be exempt from permit requirements, while larger ones typically require a permit. Use our free lookup tool to check your specific situation.
Working without a required permit in Florence can result in fines, stop-work orders, being required to remove completed work, and complications when selling your home. It's always best to check first.
Typical approval time for HVAC / Furnace permits in Florence is 5 business days. More complex projects may take longer if plan review is required.
If you live in an HOA community, you may need architectural review approval in addition to a building permit. HOA rules and city building codes are separate — you may need to satisfy both. Review your CC&Rs and submit to your HOA's architectural review committee before starting work.
Learn More About HVAC / Furnace Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read HVAC / Furnace Guide →