What Miami-Dade requires on a change-out
Every system replacement in Miami-Dade County — including an exact like-for-like change-out — needs a mechanical permit. The rules below are the county's; the cities of Miami, Hialeah, Coral Gables, Miami Beach and the Broward cities issue their own permits under the same Florida Building Code.
The permit itself
county or city, always
Miami-Dade's Department of Regulatory and Economic Resources issues it. The contractor files the building permit application with the mechanical category selected and a mechanical fee sheet; the county's published fee sheet prices an air conditioner exact change-out per ton. Licensed contractors submit through the county's e-permitting system without a plan review for a standard residential change-out. The permit stays open 180 days and closes with a mechanical inspection. Forms and the exemption list: Miami-Dade County Building.
Hurricane tie-downs
High-Velocity Hurricane Zone
Miami-Dade and Broward are the Florida Building Code's High-Velocity Hurricane Zone. The condenser must be anchored to its pad or stand with a rated tie-down and the stand itself anchored to the slab; the inspector checks it. A unit set loose on a pad, which is normal in the other four metros, fails inspection here.
Flood elevation
coastal and low-lying areas
In flood zones — much of Miami Beach, Key Biscayne, the Shores, parts of Kendall and Homestead — the condenser and often the air handler must sit above the base flood elevation, which usually means a raised stand or platform. It adds to the quote and it is the difference between a unit that survives a storm surge and one that does not.
Licensing
state, not county
Florida's Department of Business and Professional Regulation licenses air conditioning contractors — a CAC (certified, statewide) or RA (registered, local) number. It goes on the permit and should be on the quote. Every contractor in this network holds one.
FPL's $200: how the instant rebate actually works
Florida Power and Light serves nearly all of Miami-Dade and Broward. Its A/C rebate is unusual among the five metros in being instant — a credit on the invoice, not a mail-in:
- The new system must include both indoor and outdoor units, installed by an FPL Participating Independent Contractor.
- The contractor applies the $200 as a credit on the invoice at installation.
- FPL states plainly that the PIC list is a list of contractors who agreed to its program standards, not a recommendation of any of them — which is fair, and why we route by track record rather than by list.
Program terms: FPL residential programs. The federal 25C tax credit ended for equipment placed in service after 2025; a 2026 Miami installation does not get it.
Specifying for salt air
Miami-Dade equipment near the water ages roughly twice as fast as inland. The specification decides whether the new unit lasts eight years or fifteen:
| Item | What to specify | Why |
|---|---|---|
| Condenser coil | Factory-coated (epoxy or similar) coil, or all-aluminum microchannel with a coastal coating option | Galvanic corrosion between copper tube and aluminum fin is what eats Miami Beach and Aventura condensers |
| Cabinet | Manufacturer's coastal or corrosion-resistant package where offered | Sheet-metal rust-through at the base is the usual end of life |
| Placement | Away from the seaward wall, off the ground on a stand, rinsed with fresh water quarterly | Rinse is the cheapest maintenance there is |
| Sizing | Manual J with the latent load shown; about 1 ton per 500–650 sq ft after the calculation | Oversizing in a 75°F-dew-point climate leaves a clammy house at 76°F |
| Staging | Two-stage or variable-speed | Long, low runs dehumidify; single-stage units short-cycle |
| Drain | Float switch and a treated, properly sloped primary line; secondary pan on attic units | The drain runs 4,000-plus hours a year in this climate |
Where in Miami-Dade and Broward
Installers cover Homestead and the Redland north through Kendall, Pinecrest and Coral Gables, the City of Miami, Doral and Hialeah, Miami Beach and Aventura on the coast, and Hollywood, Pembroke Pines and Fort Lauderdale across the county line. The replacement demand splits by housing: 1960s–80s concrete-block homes in Hialeah, Westchester, Kendall and Cutler Bay with a garage air handler and a side-yard condenser; post-2000 homes in Doral, Homestead and Pembroke Pines with attic air handlers; and condos in Brickell, Miami Beach, Aventura and along the Fort Lauderdale beach, where the building's rules and the association decide who may install what, and where a PTAC or a small split is the whole job.
Twelve months of load
Miami-Dade records about 4,190 cooling degree days a year and roughly 140 heating degree days — climate zone 1A, the only one of the five metros in it. A system installed here runs 4,000-plus hours a year, so the efficiency line on the quote is worth more than anywhere else we serve. It also means the heating decision is trivial: a heat pump's strips will run a handful of nights a winter; a gas furnace is rarely worth its install cost here.
Installed costs in Miami
Miami labor sits toward the top of the five metros; the permit, tie-downs and coastal specification add to the base. Typical ranges before the FPL rebate:
- Central AC, condenser + coilwith permit and tie-down
- $5,200–$16,500
- Heat pump, splitthe default here
- $6,000–$19,500
- Coated-coil or coastal-package upgradeon either of the above
- $300–$1,200
- Raised stand or platformflood zones
- $400–$1,500
- Ductless mini-splitper zone; the condo answer
- $3,200–$5,500
- PTAC replacementcondo, through-wall
- $1,800–$4,000
- Mechanical permitcounty fee sheet, per ton, plus city fees where applicable
- varies by tonnage
If you arrived from a repair quote on a corroded condenser, the Miami AC repair page has the repair-side numbers to put against these. The repair-or-replace calculator and the tier table for any metro are on the installation page. Hurricane-season outlook: National Weather Service Miami.