Hello, Myself and my partner are in the process of buying our first house. The house we have identified is quite small however has a large garden, something we would like to exploit by installing a full width single story extension. Upon inspecting the site, it has become apparent that there are two Drain lids in the proposed area where we would like to construct the extension. I have contacted Thanes Water who are responsible for the drainage services within the area who have stated they are shared pipes (sewers). As we are an end of terraced house, the end which is closer to the main Thames water outlet we are confident everyone else’s and our waste runs through these pipes towards the road. I personally have no experience with drains so decided to turn to the internet. I have come across a few solutions some more costly then others and some actually not possible (double sealed lid in existing location with acces in house as Thanes Water do not allow this - conversation I had this morning with them). The solutions that I have conjured in my head are as follows, please bare in mind I have no drainage experience and this is all from online research: - Install a “Y” junction to take the inspection chamber further down the garden, away from the proposed site. - install a new independent pipe for our property Run this parallel to the existing pipe, this takes away the need for an inspection chamber as there is now no join? - write to the council (third party) and request we move the inspection chamber to the other side of our boundary. Ive decided to raise my concerns on this forum in hope of finding a cost effective or realistic solution. All opinions are welcome, positive or negative as well as insights from those with similar experiences and how you overcome them. Thanks in advance for taking the time to respond!