When it comes to replacing your air conditioner or heating system, you need to make sure you have the right permits and licenses in place. This is true regardless of your location, as an HVAC installation requires a permit. If you're unsure of the process, it's best to consult a licensed contractor from the HVAC or other industries who can help you with any questions you have about permits and inspection processes in your area. If they can't provide the answers you need, contact your city or municipality for more information.
It's important to know which home improvements require a permit and which don't. Generally speaking, modifications that require permissions are more permanent in nature. For example, you need a permit to install or remove an oven or air conditioner, but you don't need one to install a new stove if you don't have to move the gas pipes. To sum up, if you're looking to hire an AC replacement company, make sure you have the necessary permits and licenses in place.
A licensed contractor should be able to help you with any questions you have about the process, but if not, contact your city or municipality for more information.