The only contract exchanged is on our house and we have a completion date of 26 September, hence our concern that we will probably now be scrambling around trying to source a rental.
We haven't exchanged contracts on the bungalow, the deadline we gave for that is this coming Friday.
Regarding searches, they only show if there are planning applications and anything in the pipeline nearby that could potentially affect your property, not if changes have been made to the actual property. In fairness the district council wouldn't have records if the correct planning application has never been applied for.
It's for the vendor to provide all relevant documents, including a building regulation certificate, if they or the previous owner made changes. Our solicitor asked for these as a matter of course, in exactly the same way as we were asked to provide the necessary documents for this house. They have moved throughout this process at snails pace and annoyingly it was only at the end of last week they admitted they don't have the document. Their excuse is the extension was there when they bought the bungalow and they have no idea when it was done, not an acceptable response, especially as it's taken them around 8 weeks to tell us
The legal responsibility to correct this situation rests with the current owner, but if we did go ahead with an exchange the problem becomes ours. As the council official, our surveyor and the solicitor says it's a case of 'Buyer Beware'. If we do exchange the advice is only if we get a huge reduction to safeguard us against worst case scenario i.e. demolish and rebuild the extension. We don't for one minute believe the sellers will drop the price by so much, they're more likely to risk looking for a more naïve buyer and hope they have cash.