Finding extended homes…
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Homes within 1 km whose energy certificates show the floor area growing: extensions, loft and garage conversions. Tap a home on the map or in the list for its full history. Back to CM9 6SZ
Not every extension shows here. We only see building work when a new energy certificate is lodged, which happens when a home is sold, let or newly built. A loft or extension added since then won't appear, even with planning permission and building control sign-off, because those records aren't published as open data outside London. Missing work doesn't mean missing paperwork.
| Home | Before | After | Added | Recorded |
|---|---|---|---|---|
| Mandaley, Post Office Road213 m away | 147 m² | 303 m² | +156 m² +106% | 2023 |
| Oak House, Chelmsford Road598 m away | 217 m² | 288 m² | +71 m² +33% | 2025 |
| Rock Cottage, Burnham Road823 m away | 113 m² | 184 m² | +71 m² +63% | 2017 |
| The Willows, Bryants Lane507 m away | 299 m² | 369 m² | +70 m² +23% | 2012 |
| Orotava, Post Office Road281 m away | 153 m² | 211 m² | +58 m² +38% | 2024 |
| Brelades, Burnham Road231 m away | 146 m² | 193 m² | +47 m² +32% | 2014 |
| Salters Folly, Burnham Road350 m away | 200 m² | 231 m² | +31 m² +16% | 2022 |
From energy performance certificates (MHCLG): a later certificate shows at least 15 m² and 15% more floor area than an earlier one (and no more than 2.5 times, to leave out typing errors). Some changes come from a more careful measurement rather than building work. Addresses: HM Land Registry. Contains HM Land Registry data © Crown copyright and database right 2026, OGL v3.0.