Hi, Can anyone offer advice on the regulation for manhole covers. I want to extend my kitchen but there is a manhole cover a foot outside the back door. The extension would obviously go straight over this. I've had a couple of builders quotes from: 1 we'll build over it and put a sealed cover on it. 2 the manhole has to come outside of the property and run back on the line again under the extension. 3 you can't do that, the manhole has to stay because the water company won't give you permission to work on it. 4, you can't do that, the manhole has to come outside because of paragraph 1 of regulation whatdyamacallit. It sounds reasonable to move it so it stays outside. Can anyone offer more sound advice please.