Mechanical and HVAC Permits in South Florida – Miami-Dade, Broward and Palm Beach County 2026

Mechanical permits are required for all HVAC (heating, ventilation, and air conditioning) system installations and replacements, commercial kitchen exhaust systems, industrial ventilation systems, refrigeration systems, boiler installations, and related mechanical equipment across Miami-Dade County, Broward County, and Palm Beach County. In South Florida's tropical climate, where air conditioning systems operate year-round and commercial kitchen equipment runs continuously, mechanical permits are among the most frequently issued construction permits. Bypassing mechanical permits exposes property owners to USD fines, equipment failure liability, and forced removal of all non-permitted mechanical work.

Why Mechanical Permits Are Required

Mechanical systems — particularly HVAC systems — directly impact indoor air quality, energy efficiency, occupant comfort, and fire safety. Improperly designed or installed HVAC ductwork can spread fire, smoke, and toxic gases throughout a building. Improperly installed refrigerants create environmental hazards. Inadequate ventilation in commercial kitchens creates fire hazards from grease accumulation. Government mechanical inspectors verify that all mechanical work meets the Florida Building Code, ASHRAE standards, and applicable mechanical codes before systems are operated and occupied.

Mechanical Permit Types in South Florida

Miami-Dade County, Broward County, and Palm Beach County issue mechanical permits for the following systems and activities:

Residential HVAC Installation Permit is required for the installation of a new central air conditioning and heating system in a residential property, including the air handler (indoor unit), condensing unit (outdoor unit), refrigerant lines, and ductwork. New construction residential HVAC permits are typically part of the overall building permit package, while replacement HVAC permits are separate mechanical permits.

HVAC System Replacement Permit is required when replacing an existing air conditioning or heat pump system with a new system. HVAC replacements — even same-location unit swaps — require permits in South Florida. The permit ensures the new equipment meets current efficiency standards and that the refrigerant type is approved under current environmental regulations (R-410A systems replacing older R-22 systems, for example).

Ductwork Installation or Replacement Permit covers the installation of new ductwork or the replacement of existing ductwork systems in residential and commercial buildings. Ductwork sizing, sealing, insulation, and routing must meet Florida Building Code requirements for energy efficiency and fire safety.

Commercial HVAC Permit covers the installation of rooftop package units, split systems, chilled water systems, fan coil units, and other commercial HVAC equipment in offices, retail stores, restaurants, hotels, schools, hospitals, and other commercial facilities. Commercial HVAC projects typically require engineered mechanical plans stamped by a Florida-licensed mechanical engineer.

Commercial Kitchen Exhaust Hood Permit is required for the installation of Type I (grease) and Type II (non-grease) commercial kitchen exhaust hoods and the associated makeup air systems. Type I grease exhaust systems require specific fire suppression system integration and must comply with NFPA 96 standards. Commercial kitchen exhaust system installations often require both a mechanical permit and a fire permit.

Refrigeration System Permit covers the installation and modification of commercial refrigeration equipment including walk-in coolers, walk-in freezers, reach-in refrigeration units with remote condensing units, and commercial ice machine installations. Refrigerant handling requires EPA Section 608 certification.

Boiler Permit is required for the installation of steam and hot water boilers in commercial and industrial facilities. Boiler permits in Florida involve both building department review and Florida Department of Agriculture and Consumer Services (FDACS) boiler inspection compliance.

Industrial Ventilation Permit covers industrial process ventilation systems, paint spray booth exhaust systems, chemical storage area ventilation, laboratory exhaust systems, and other specialized industrial ventilation applications.

Exhaust Fan Installation Permit may be required for the installation of exhaust fans in bathrooms, utility rooms, and other spaces that must comply with Florida Building Code ventilation requirements. Contact the applicable building department to confirm permit requirements for specific exhaust fan installations.

Miami-Dade County Mechanical Permit Process

Mechanical permits in Miami-Dade County are processed by the Building Department's Mechanical Division. Residential HVAC replacement applications typically require: completed application form, letter of intent, equipment specifications and manuals for new equipment, and load calculations confirming the new system is properly sized for the conditioned space. Commercial mechanical permit applications require engineered mechanical plans stamped by a Florida-licensed mechanical engineer.

Miami-Dade Building Department: (786) 315-2000, miamidade.gov/permits.

Plan review for residential HVAC permits typically takes 5 to 30 days. Commercial mechanical projects require longer review periods. Required mechanical inspections include: rough-in inspection (ductwork installed and accessible), refrigerant line inspection, and final mechanical inspection.

Broward County Mechanical Permit Process

Broward County Building Division: (954) 765-4400, broward.org/building. Required inspections for mechanical permits in Broward County: rough mechanical and final mechanical. Commercial kitchen exhaust systems require additional fire-related inspections.

Palm Beach County Mechanical Permit Process

Palm Beach County Building Division: (561) 233-5100. Required inspections: rough mechanical and final mechanical. Commercial mechanical systems in large facilities may require additional staged inspections.

Mechanical Contractor License Requirements

All mechanical work under a permit in South Florida must be performed by a Florida-licensed Mechanical Contractor or, for residential HVAC work under certain conditions, a Florida-licensed Air Conditioning Contractor. All licenses must be current, valid, and not expired. Mechanical contractors must carry current workers' compensation insurance, general liability insurance, and a valid Local Business Tax Receipt.

Mechanical Permit Fees

Mechanical permit fees are charged in USD based on the equipment tonnage, the equipment value, or the construction valuation of the project. Application fees, plan review fees, and inspection fees are all charged separately in USD. Reinspections cost USD fees per visit. Permit extensions cost additional USD fees.

Consequences of Unpermitted Mechanical Work

Unpermitted HVAC installations result in USD fines, stop-work orders, required removal and replacement of all non-permitted mechanical work, homeowners' insurance complications, and energy rebate program disqualification. Florida Power and Light (FPL) and other utilities offer rebates for high-efficiency HVAC equipment installations — unpermitted installations are not eligible for these rebates. Always permit HVAC and mechanical work in South Florida.