The back wall of our garden is retaining the garden of the house behind us. We are about 1.5m lower than their garden.
We have lived here 5 years without any issues. The wall is covered with ivy, and nothing untoward was mentioned on the homebuyers report when we bought. So as far as we are aware no issues with the wall.
But the owner of the house behind is now selling, and the buyers survey has detected a potential issue, they think the wall may be subsiding, and their garden could potentially collapse into ours in the long term.
They are getting a structural engineers report done at the cost of the seller, but he came round today to tell us he thinks the wall is our responsibility and therefore we would bear the cost of any action that is needed.
So my questions are - are we responsible for the wall? My deeds say all boundary walls/fences are joint responsibility, but a quick google says that retaining walls are the responsibility of the land they are retaining (ie the neighbours).
If we are responsible, is this likely to be something covered by our buildings insurance, given that it is likely to be a pre-existing issue? And if not can we be forced to complete the works and pay, given that so far nothing bad has happened and may not in the future?
Oh and so as not to drip feed, when we bought the house there was a massive tree right next to the wall, which we have subsequently cut down, but the roots appear to be partially under the wall, so may have caused any issue.
Depending on the outcome of the SER I will call our insurers, and get legal advice, but was just wondering if anyone could give me an idea of what the situation may be?
Thanks