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 S21 4HS
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 |
|---|---|---|---|---|
| Greenhall Farm, 132, High Street650 m away | 124 m² | 195 m² | +71 m² +57% | 2021 |
| 14, Fenton Street235 m away | 98 m² | 160 m² | +62 m² +63% | 2017 |
| 2, Elm Road466 m away | 71 m² | 125 m² | +54 m² +76% | 2022 |
| 30, Ash Crescent552 m away | 82 m² | 132 m² | +50 m² +61% | 2014 |
| 8a, School Street785 m away | 111 m² | 161 m² | +50 m² +45% | 2013 |
| 27, Highwood Place463 m away | 67 m² | 114 m² | +47 m² +70% | 2014 |
| 4, Pasture Grove349 m away | 80 m² | 112 m² | +32 m² +40% | 2020 |
| 20, Billam Street225 m away | 102 m² | 133 m² | +31 m² +30% | 2021 |
| 170, Ravencar Road486 m away | 96 m² | 127 m² | +31 m² +32% | 2016 |
| 47, John Street971 m away | 81 m² | 111 m² | +30 m² +37% | 2024 |
| 71, Curlew Avenue59 m away | 60 m² | 89 m² | +29 m² +48% | 2016 |
| 6, Marsh View298 m away | 88 m² | 113 m² | +25 m² +28% | 2025 |
| 2, Dronfield Road134 m away | 81 m² | 106 m² | +25 m² +31% | 2022 |
| 7, West End View247 m away | 147 m² | 171 m² | +24 m² +16% | 2019 |
| 19, Valley View Close410 m away | 79 m² | 102 m² | +23 m² +29% | 2020 |
| 120, High Street650 m away | 76 m² | 98 m² | +22 m² +29% | 2022 |
| 42, Ash Crescent552 m away | 73 m² | 95 m² | +22 m² +30% | 2014 |
| 20, Darcy Road380 m away | 59 m² | 78 m² | +19 m² +32% | 2024 |
| 10, Fanshaw Drive493 m away | 57 m² | 76 m² | +19 m² +33% | 2020 |
| 88, Ash Crescent552 m away | 73 m² | 91 m² | +18 m² +25% | 2024 |
| 2, Roundhill Cottages562 m away | 75 m² | 93 m² | +18 m² +24% | 2019 |
| 39, Springfield Close505 m away | 57 m² | 72 m² | +15 m² +26% | 2026 |
| 38, Chesterfield Road291 m away | 53 m² | 68 m² | +15 m² +28% | 2025 |
| 11, Partridge Close195 m away | 37 m² | 52 m² | +15 m² +41% | 2016 |
| 29, Hayfield View439 m away | 65 m² | 80 m² | +15 m² +23% | 2015 |
| 12, Fanshaw Close539 m away | 96 m² | 111 m² | +15 m² +16% | 2014 |
| 24, Dronfield Road134 m away | 86 m² | 101 m² | +15 m² +17% | 2013 |
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.