granny annexe

We are looking to put a granny annexe next to our home. Except our garden is 15 feet below the main home as it’s on a hill. So it would be against the retaining wall. Main main question is waste as the mainpipe would be well above headheight at the main house. Is this possible?

Hi - I'm really sorry if this has been posted before but these forums are extensive!! We are building an annexe in our back garden, about 20m away from the main house. Two rooms internal dimension total about 32m2. It will be made from a SIPs construction so hopefully very well insulated. We...

Hello, We just got planning permission for an annexe in our garden after a year battle with planning, hurray! So now we are thinking of the practicalities. The annexe will be over 30m away from the main house. The house connects to the mains sewer via a manhole located in a shared drive at...