We have an outbuilding separate to our house. It's on its own meter so we are billed separately for it.
We hardly ever use it. Part of it is sectioned off as shed and the other part is a mostly empty room that hubby has set up as a 'gym' (lol - never used). There are two main uses of power in the building: a fridge freezer which we use for wine and beer and a light on the outside which appears to be on some sort of light sensitive timer meaning it comes on around dusk and is off at dawn/in the day. Other than that, we'll turn a light on inside if we go out there in the dark to get something - a couple of times a week for a matter of seconds. That's it.
Our bills are coming in at about £10 per month. This seems a lot when the electric for the main house (large 3 bed character semi, we have quite high usage as husband works shifts so the house is often occupied in the day, kettle and washing machine constantly on the go as I'm somewhat laundry and tea obsessed) is about £35 per month. We're definitely using more than 3.5x the amount of electricity compared to the outbuilding as, y'know, we actually live in it!
Am I missing something? Does a tenner a month seem reasonable? I know there are standard charges on top of usage but I didn't think they'd be that high!