
Most stepped gardens in Pontypool already have levels of a sort. The trouble is that they tend to be the wrong height, the wrong width, or held up by a wall that has started to bow. Before drawing anything, we look at where the ground wants to sit, how much soil would have to come out or go in, and where the water runs when it rains hard on the hill behind.
From there we can plan fewer, wider terraces instead of lots of narrow strips, or keep the existing levels and rebuild the walls that hold them. Every retaining wall gets a footing on firm ground, free-draining stone behind it and weep holes through the face, because wet soil on a valley side pushes far harder than dry soil. The local guide to terracing a steep Pontypool back garden walks through the planning in more detail.
- Low walls holding a bed or a small step in level: usually simple to build
- Taller walls, or walls holding up a path, a shed or next door's garden: may need an engineer's design
- Walls on a shared line: worth talking to the neighbour before anything is taken down