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 CB25 0LB
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 |
|---|---|---|---|---|
| 6, Cage Hill296 m away | 67 m² | 139 m² | +72 m² +107% | 2020 |
| The Smock Tower Mill, Mill Hill205 m away | 155 m² | 227 m² | +72 m² +46% | 2014 |
| 3, Tothill Road502 m away | 72 m² | 119 m² | +47 m² +65% | 2026 |
| 43, Lower End170 m away | 119 m² | 165 m² | +46 m² +39% | 2021 |
| 17, Fairview Grove0 m away | 85 m² | 118 m² | +33 m² +39% | 2014 |
| 15, Rogers Road327 m away | 77 m² | 104 m² | +27 m² +35% | 2015 |
| 32, Cage Hill296 m away | 115 m² | 140 m² | +25 m² +22% | 2015 |
| 10, Mill Hill205 m away | 82 m² | 105 m² | +23 m² +28% | 2016 |
| 31, Cage Hill296 m away | 98 m² | 118 m² | +20 m² +20% | 2014 |
| 22, Mill Hill205 m away | 83 m² | 102 m² | +19 m² +23% | 2026 |
| 24, Fairview Grove0 m away | 99 m² | 114 m² | +15 m² +15% | 2015 |
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.