What can — and can't — be built at this postcode?

Enter a full postcode and we query planning.data.gov.uk — the national planning dataset assembled by MHCLG from every local planning authority — for the statutory designations at that exact location: conservation areas, Article 4 directions, listed buildings, tree preservation orders, flood zones and green belt. Each flag is shown plainly, with the designation’s name where the dataset provides one.

We also name your local planning authority and link straight to its own planning register, because live and historical applications — extensions next door, a change of use up the road — are published there, not in any single national feed.

Two identical houses can carry very different potential. In a conservation area, permitted-development rights are reduced and demolition needs consent; an Article 4 direction can remove specific rights entirely (HMO conversion is a common one); a listed building needs listed-building consent for almost any alteration, inside or out. Green belt makes extension and replacement policy much stricter, and a flood zone shapes both permission and insurance.

None of these is automatically a reason not to buy — a conservation area often protects value — but every one of them changes what you can do and what it will cost. Check the constraints before you set your price, and see them alongside crime, flood and sold prices in the property’s OfferCheck.