Our place had a garage conversion done in the early 80s with no evidence of building control signoff. Solicitor said it was a non-issue due to the length of time since the work was completed, as Sam_w mentioned I believe there is an enforcement window for these things.
The solicitor also seemed pretty chilled about the lack of FENSA documentation for the windows. We've since had those redone by a reputable company , sorted the electrics which turned out to be a mess and had building control out to signoff knocking through a load bearing wall, so we've gone from no paperwork to tonnes of it!
Our place had a garage conversion done in the early 80s with no evidence of building control signoff. Solicitor said it was a non-issue due to the length of time since the work was completed, as Sam_w mentioned I believe there is an enforcement window for these things.
The solicitor also seemed pretty chilled about the lack of FENSA documentation for the windows. We've since had those redone by a reputable company , sorted the electrics which turned out to be a mess and had building control out to signoff knocking through a load bearing wall, so we've gone from no paperwork to tonnes of it!