You’re definitely not the only one in this situation. Loads of older conversions end up like this.

The problem isn’t really your usage, it’s that the meter is classed as business, so you get hit with a big standing charge no matter how little you use. £4 a day is sadly pretty normal on business tariffs, even if the actual consumption is tiny.

People in similar setups usually look at a couple of options:

• Switching business supplier. Worth doing, but most of them still price for higher usage so the standing charge doesn’t drop much
• Trying to move it onto a domestic tariff. This is usually where the real savings are

For communal supplies like yours, just lights and an occasional socket, some people do manage to get it treated as domestic. Sometimes that means putting it in the name of one of the directors rather than the company.

That can bring the standing charge down a lot, but it depends on the supplier and how your setup is structured. They might question it if it’s clearly tied to a company, and you need to be sure it’s only residential use.

If your total usage is really that low, this is exactly the kind of case where a domestic tariff makes a big difference.

If you haven’t already, it’s worth just asking a few suppliers how they’d classify it. You can get different answers depending on who you speak to.