No license needed: minor service that doesn't change the structure — lubrication, a new remote, replacing a photo-eye.
License + permit needed: installing or replacing a door, its tracks and counterbalance, or re-anchoring it to the opening — that is permitted contracting work.
When you do not need a license
Light, like-for-like service that doesn't touch the structure or the door's wind-load path is generally treated as maintenance, not contracting — usually no permit and no specialty license.
When you do need a license
Once the job means installing a new door, replacing the counterbalance system, or fastening track and brackets back into the framing, it becomes permitted work. In Florida that is the Garage Door Installation Specialty Contractor scope, and the 120-volt circuit for an operator must be subcontracted to a licensed electrical contractor.
Rule of thumb: if you touch the structure, the anchoring, or the counterbalance, you need a license and a permit.
Why the state cares about garage doors specifically
The garage door is the largest opening in most building envelopes, so its wind resistance and entrapment-safety performance directly affect occupant safety. That's why Florida licenses the trade and tests it on a dedicated exam.
Installing doors for a living? Get licensed.
The path is the Florida Garage Door Installation Specialty Contractor license — and the trade-knowledge exam is exactly what we prepare you for.