In united states, anyone knows who should I contact to add another 200A service to my garage? Power supply company or electrician? I currently have one 200A service in basement which is fully occupied
It's not easy since you are responsible for upgrading the service to the pole. Call your electric provider they will steer you to the correct department. They will provide it but expect to pay around 10K on the cheap to upgrade it. anywhere from 8-16K