gap to retaining wall and extension

  1. R

    Building an extension against an existing garden retaining wall

    Hi I am planning on building a one storey extension to the rear of my garden flat which is on the ground floor of a victorian terrace house in london. There is an existing sunken patio to the rear of my flat and there is a 1.2m high retaining wall holding the raised garden. The extension I want...
    • Reclined Dude
    • Thread
    • cavity drain system extension gap to retaining wall and extension garden extension garden retaining wall patio extension retaining wall sunken patio tanking
    • Replies: 3
    • Forum: Building
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