The quick answer
Most construction work installing or replacing mechanical (HVAC) equipment in Florida requires a building permit before work begins, so the work can be inspected for code compliance. The permit holder — the contractor — is responsible for calling the required inspections at the appropriate stages.
Why a like-for-like changeout still needs one
The instinct is that swapping equipment for the same size is maintenance. Florida does not see it that way, because a changeout is where compliance actually gets decided: equipment efficiency, duct condition and sealing, refrigerant line work, condensate handling, electrical connection, and whether the installation meets the current energy code rather than the one in force when the original went in.
The permit is what forces that to be verified by someone other than the installer.
Permit or not — quick reference
| The job | Permit? |
|---|---|
| Filter changes, coil cleaning, routine maintenance | No |
| Diagnosing and repairing existing equipment | Generally no |
| Replacing a condenser or air handler | Yes |
| Full system changeout | Yes |
| New installation | Yes |
| Duct replacement or redesign | Yes |
Local building departments apply this differently and requirements change. Confirm with the authority having jurisdiction before starting work.
What inspection actually looks at
Two Florida-specific things come up far more than people expect.
Duct sealing. The Florida Energy Conservation Code requires duct joints and seams to be sealed — and it is specific about how. Mastic, mastic with mesh, and UL 181 listed tapes are acceptable. Standard cloth-backed duct tape is not approved as a long-term duct seal, despite the name. That single item fails more inspections than it has any right to.
Service access. Where equipment sits under a floor or in a crawl space, the access opening and passageway must be large enough to remove the largest appliance and allow service access. Not merely large enough for a technician to squeeze through — large enough to get the equipment out.
For homeowners
An unpermitted changeout is the kind of thing that stays invisible for years and then appears at the worst moment — during a home inspection, or when an insurer asks how the work was permitted.
For contractors: the permit is the license in practice
Pulling permits in your own name is the concrete difference between running the job and working under someone else's license. It also carries the duty that comes with it: the permit holder schedules the inspections, and the work is inspected against the code as it stands now.
Code is examined material too. Florida Building/Mechanical & Energy Code is one of the ten content areas on the licensing exam, and permitting and inspection responsibility sit inside it alongside Business, Law & Licensing under Chapter 489.
Want to pull your own permits?
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