Sam45

So you mean an extension of our brick wall which thickens on the neighbours garden side ( under his soil) as it goes deeper into the soil. Problem is this would not be reinforced as the neighbours reinforced hollow brick will be. Also a brick wall built this way would mean a) it’s our whole wall going into his border which I am not sure he would agree b) the brick wall can’t be reinforced ( and the horizontal pressure from the neighbours garden against our wall, especially when the soil is wet from heavy rain and water coming downhill generally as we live on a hill, is high. Our double brick wall has cracked from the middle to to horizontal pressure c) we might have problems accessing the neighbours garden in the future for repairs. d) the neighbours only want about 215 mm of the side of their garden dug to accommodate a hollow brick wall and drainage gravel behind it.

The neighbour can’t refuse to take part as it is his garden which is sliding downhill and pushed our wall down. His garden weight has increased as it has been ‘built up’ from the old original house that was knocked down’s level without considering the effect on our wall. Also he has built his patio right against our wall which is pushing our wall down. His whole garden patio plus soil area is dropping vertically and moving downhill horizontally so to be frank he would be responsible for ‘ securing’ his garden so it does not damage other people’s property. Hence the second wall on the bright side to retain his garden and stop it sliding. Our brick wall is on our borderline originally built like that so we wanted it built the same. Otherwise our borderline will change.

Here are some more pictures. The neighbours garden is sliding towards our wall. The soil is built up with old rubbish from when they knocked down the old house and dig a basement in the new house. They also rebuilt their patio right against our wall. There will is approximately 15metres by 1 metre high and then pillars which are 550mm x 1 metre.

See pictures. The existing brick wall is on the border and is our wall on our land. We are excavating the existing wall. Then rebuilding as original. Then there will be a reinforced hollow concrete filled wall on the neighbours side up to his soil level as he needs to stop his garden from pushing our wall down again. His garden is 1 metre higher than ours. There will be a joint concrete foundation which will cross into the neighbours garden plus ours to build both walls on. Planning the foundation to be 800mm deep and about about 750mm wide.

Hi I just need some advice. We are building two retaining walls as the neighbours garden is sliding and pushed our wall down. We are on a hill and our garden is lower than the neighbours. One wall will be the original double brick wall with pillars (16m x 1m and then 1 metre high pillars with wood panels) on our border and then there will be a reinforced hollow concrete block wall filled with concrete on the neighbours side of the garden ( up to his soil level), to ‘retain’ his garden and stop his garden sliding down and pushing our wall down. Does anyone know how much gap needs to be left in between the two walls?