Hi, we are a fair way through the process of buying a house. We have just found out that the loft conversion, conservatory and re-roof were completed without building control approval. Initial applications were put in but the certificates were never obtained. The sellers have lied about this throughout the process, advising the loft room as a 'bedroom' and being vague about details. The work was all carried out under the previous owners about 20 years ago. The sellers have obtained an indemnity for the entire house and are arguing that this provides enough coverage. Our main concerns are the safety of the work completed and the issues we may face when selling in future, as well as the lender's response to finding this out (as it is a 2 bedroom rather than a 3 bedroom as they valued it at). Should we request that retrospective permission is sought? Will our home insurance cover any issues that we may have in relation to this? Thanks!