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 CB21 6BG
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 |
|---|---|---|---|---|
| 17, Cambridge Road422 m away | 168 m² | 297 m² | +129 m² +77% | 2025 |
| 41, Cambridge Road422 m away | 85 m² | 167 m² | +82 m² +96% | 2013 |
| 3, West Field556 m away | 98 m² | 172 m² | +74 m² +76% | 2026 |
| 12, West Field556 m away | 72 m² | 143 m² | +71 m² +99% | 2022 |
| 16, Bourn Bridge Road583 m away | 96 m² | 161 m² | +65 m² +68% | 2015 |
| 5, Bourn Bridge Road583 m away | 143 m² | 202 m² | +59 m² +41% | 2017 |
| 1, High Street0 m away | 102 m² | 155 m² | +53 m² +52% | 2026 |
| 41, Church Lane235 m away | 185 m² | 238 m² | +53 m² +29% | 2026 |
| 15, Bourn Bridge Road583 m away | 210 m² | 259 m² | +49 m² +23% | 2022 |
| 20, Magna Close569 m away | 94 m² | 142 m² | +48 m² +51% | 2022 |
| 2, Bourn Bridge Road583 m away | 171 m² | 218 m² | +47 m² +27% | 2014 |
| 99, High Street661 m away | 80 m² | 125 m² | +45 m² +56% | 2022 |
| 33, Cambridge Road422 m away | 252 m² | 294 m² | +42 m² +17% | 2020 |
| 89, High Street661 m away | 67 m² | 102 m² | +35 m² +52% | 2024 |
| 2, Ivan Clarks Corner204 m away | 32 m² | 65 m² | +33 m² +103% | 2024 |
| 145, High Street661 m away | 100 m² | 132 m² | +32 m² +32% | 2015 |
| 1, Magna Close569 m away | 92 m² | 124 m² | +32 m² +35% | 2011 |
| 21, Bourn Bridge Road583 m away | 184 m² | 212 m² | +28 m² +15% | 2016 |
| 6, Bourn Bridge Road583 m away | 137 m² | 162 m² | +25 m² +18% | 2019 |
| 16, High Street0 m away | 142 m² | 166 m² | +24 m² +17% | 2022 |
| 11, Mortlock Gardens737 m away | 64 m² | 85 m² | +21 m² +33% | 2025 |
| 17, Bourn Bridge Road583 m away | 113 m² | 134 m² | +21 m² +19% | 2023 |
| 1, West Field556 m away | 114 m² | 134 m² | +20 m² +18% | 2026 |
| 163, High Street661 m away | 126 m² | 145 m² | +19 m² +15% | 2023 |
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.