Three variables drive the price of a home charger: the distance from your panel to the parking spot, whether your service has spare capacity, and the local permit fee.
A short garage run on a panel with room is the simple case. Long exterior runs, detached garages, and trenching add material and labor.
Load management is the cost lever most homeowners don't know about. A device that shares capacity with your existing loads can avoid a panel upgrade entirely on a healthy 100A service.
Ask for a fixed quote that includes permit fees and inspection. Anything quoted without a site check is a guess.
Questions about your own home? Request a visit or call (415) 555-0142.