AC Permit Requirements in Miami-Dade County
Whether an AC project needs a permit in Miami-Dade County depends on the specific details of your project.
Verified against official sources · Last verified: September 10, 2026
Do You Need a Permit?
Conditional — More Information NeededA permit is generally required for AC/HVAC installation, replacement, and most repair work in Miami-Dade County. A narrow exemption exists for specific minor repairs (air conditioning duct, coil/compressor/refrigerant piping, non-combustion heating, or fans inside equipment) performed by a licensed mechanical or air-conditioning contractor.
See what applies to your exact property.
Check Your PropertyPermit Type
Mechanical Permit
Documents You May Need
- Building Permit Application
- Mechanical Fee Sheet
Conditions That Can Affect This Result
This isn't a flat rule — the outcome can depend on details specific to your project. Use the checker to get a result based on your own answers, or see the verified scenarios below.
- If work type is full system replacement: a permit is required.
- If work type is partial replacement: a permit is required.
- If work type is new installation: a permit is required.
- If repair subtype is other: more information is needed to determine this.
- If is licensed mechanical contractor work is no: a permit is required.
What to Do Next
- 1Confirm which scenario applies to your project with the building department.
- 2Once confirmed, gather the required documents for that scenario.
- 3Contact the building department for how to submit your application.
Ready to continue?
Apply for the permit
Open the official government application portal.
Questions about your permit?
Call the Building Department.
Common Questions
Do I need a permit to replace an AC unit?
Yes — installation and replacement work always requires a permit in Miami-Dade County.
Do minor AC repairs require a permit?
A narrow exemption covers specific minor repairs — duct, coil/compressor/refrigerant piping, non-combustion heating, or fans inside the equipment — when done by a licensed mechanical or A/C contractor.
Permit Fees
Fees vary by project scope. Most residential AC/HVAC repair or replacement contracts are exempt from the Notice of Commencement filing requirement under Florida Statute 713.135, which does not apply to HVAC repair/replacement contracts valued under $15,000.
Review Time
Varies by project and plan-review workload
Building Department
Regulatory and Economic Resources (RER) — Building & Permits
Phone: 305-375-2877Email: RERInfo@miamidade.govAddress: 111 NW 1st Street, 11th Floor, Miami, FL 33128
Official Sources
Miami-Dade County — Mechanical Permits
miamidade.gov · Official page · verified September 10, 2026
Source last checked: September 17, 2026
Miami-Dade County — Permit Exemptions
miamidade.gov · Official page · verified September 10, 2026
Source last checked: September 17, 2026
Miami-Dade County — Mechanical Fee Sheet
miamidade.gov · Fee schedule · verified September 10, 2026
Source last checked: September 17, 2026
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PermitAhead provides informational guidance based on official government sources. Final permitting decisions are made by the applicable local authority.