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 NG4 4QF
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 |
|---|---|---|---|---|
| Reed Pond House, Park Lane923 m away | 244 m² | 493 m² | +249 m² +102% | 2022 |
| 16, Main Street253 m away | 148 m² | 229 m² | +81 m² +55% | 2024 |
| 63, Catfoot Lane0 m away | 102 m² | 141 m² | +39 m² +38% | 2018 |
| 35, Catfoot Lane0 m away | 85 m² | 124 m² | +39 m² +46% | 2013 |
| 29, Orchard Rise317 m away | 57 m² | 91 m² | +34 m² +60% | 2024 |
| 12, Green Lane519 m away | 37 m² | 69 m² | +32 m² +86% | 2024 |
| 72, Main Street460 m away | 60 m² | 91 m² | +31 m² +52% | 2014 |
| 1, Flamstead Avenue264 m away | 152 m² | 183 m² | +31 m² +20% | 2013 |
| 65, Green Lane519 m away | 91 m² | 121 m² | +30 m² +33% | 2025 |
| 8, Trinity Crescent368 m away | 81 m² | 102 m² | +21 m² +26% | 2021 |
| 27, Main Street253 m away | 42 m² | 61 m² | +19 m² +45% | 2020 |
| 20, Chapel Lane302 m away | 62 m² | 80 m² | +18 m² +29% | 2021 |
| 13, Cromwell Crescent444 m away | 95 m² | 111 m² | +16 m² +17% | 2017 |
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.