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 OX14 4QJ
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 |
|---|---|---|---|---|
| Walden East195 m away | 243 m² | 429 m² | +186 m² +77% | 2022 |
| Challis Farm, High Street263 m away | 102 m² | 218 m² | +116 m² +114% | 2013 |
| Greenways, Didcot Road469 m away | 229 m² | 308 m² | +79 m² +34% | 2020 |
| 35, Westfield Road592 m away | 86 m² | 144 m² | +58 m² +67% | 2021 |
| East Cottage, High Street263 m away | 81 m² | 125 m² | +44 m² +54% | 2022 |
| 19, Westfield Road592 m away | 125 m² | 154 m² | +29 m² +23% | 2024 |
| 43, Westfield Road592 m away | 70 m² | 97 m² | +27 m² +39% | 2025 |
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.