Before you sign on the dotted line, commissioning a pre-purchase survey from a heritage specialist is one of the smartest moves you can make. Unlike a standard survey, a heritage consultant knows exactly how to assess a listed building for unauthorised works. Contrary to popular opinion, both the interior and exterior of a listed building are designated and consequently changes to internal rooms, floor coverings, ceilings as well as roofs, windows and walls without listed building consent can constitute a criminal offence under the Planning (Listed Buildings and Conservation Areas) Act 1990. The Local Planning Authority can also instigate enforcement proceedings to remove the works undertaken – whether a rear extension or a loft conversion, to a new doorway or decorative scheme.
This is where the pre-purchase survey earns its keep. A heritage specialist has experience in looking for anomalies that are not contextual with the historic building. They will cross-reference what they find on-site against any consents granted by the local planning authority, identifying discrepancies that could land the new owner in hot water — even if they weren't the ones who wielded the paintbrush or the sledgehammer. Unauthorised works don't disappear with a change of ownership; the liability transfers with the title deeds. Knowing about these issues before exchange is infinitely preferable to discovering them during a local authority enforcement investigation after you've moved in.
Armed with a thorough report, buyers are in a much stronger negotiating position. If unauthorised works are identified, you have concrete grounds to renegotiate the purchase price to account for the cost of rectification — or, in some cases, to walk away entirely. The survey transforms what might otherwise be a nasty post-purchase surprise into a known quantity you can plan and budget for. It also opens up a frank conversation with the vendor: were they aware? Is there historic paperwork buried somewhere? Sometimes a bit of digging can save a lot of heartache later.
The good news is that unauthorised works on a listed building are rarely the end of the world, provided they're handled correctly. The typical route (if the works are not considered harmful) is a retrospective application for Listed Building Consent, which regularises the works in the eyes of the planning authority. In some cases, an element of reinstatement may be required; the key is engaging with the process proactively and professionally rather than hoping nobody notices - a strategy that will inevitably falter in the future.
This is precisely where the Bidwells' heritage team comes in. From interpreting the buildings on the ground to advising on the most pragmatic path to regularisation, the team can prepare and managing retrospective LBC applications and liaise with local planning authorities on your behalf, guiding you through the process from start to finish. Whether you're at the pre-purchase stage weighing up a decision, or you've already taken ownership and discovered an issue, Bidwells has the expertise to help you navigate listed building legislation with confidence — and, crucially, without the stress of going it alone.
