Our feed is under ground so you should also check the size of the conduit running to the breaker box as that dictates the maximum size wire (and thus capacity) you can run into it. The box at our house had a few extra circuits but is limited to 100A service by the conduit/wire size from the main feed.
Especially if it is an older home, is there space in the breaker box for additional circuits.
Our feed is under ground so you should also check the size of the conduit running to the breaker box as that dictates the maximum size wire (and thus capacity) you can run into it. The box at our house had a few extra circuits but is limited to 100A service by the conduit/wire size from the main feed.