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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 DL15 8JY
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 |
|---|---|---|---|---|
| The Smelt House, Fir Tree Grange621 m away | 462 m² | 670 m² | +208 m² +45% | 2015 |
| 23, Brookside Avenue352 m away | 136 m² | 226 m² | +90 m² +66% | 2023 |
| 16, Brookside Avenue495 m away | 101 m² | 173 m² | +72 m² +71% | 2020 |
| 77, Beechburn Park643 m away | 83 m² | 144 m² | +61 m² +73% | 2022 |
| 4, New Road931 m away | 190 m² | 250 m² | +60 m² +32% | 2022 |
| 28, Beechburn Park571 m away | 117 m² | 175 m² | +58 m² +50% | 2021 |
| 6, Gardener Court951 m away | 67 m² | 113 m² | +46 m² +69% | 2025 |
| 11, Hollowdene386 m away | 81 m² | 118 m² | +37 m² +46% | 2019 |
| 1, Brookside Avenue495 m away | 84 m² | 120 m² | +36 m² +43% | 2015 |
| 12, Peases Way766 m away | 86 m² | 115 m² | +29 m² +34% | 2020 |
| 3, Mcmillan Drive856 m away | 120 m² | 143 m² | +23 m² +19% | 2026 |
| 4, Sewell Court803 m away | 128 m² | 150 m² | +22 m² +17% | 2026 |
| 48, Chaucer Drive751 m away | 76 m² | 97 m² | +21 m² +28% | 2022 |
| 2, Weavers Croft0 m away | 122 m² | 143 m² | +21 m² +17% | 2021 |
| 32, Burnhope Close808 m away | 77 m² | 98 m² | +21 m² +27% | 2015 |
| 30, Beechburn Park571 m away | 115 m² | 136 m² | +21 m² +18% | 2014 |
| 19, Dickens Way692 m away | 77 m² | 97 m² | +20 m² +26% | 2025 |
| 60, Beechburn Park643 m away | 62 m² | 82 m² | +20 m² +32% | 2024 |
| 9, Ullswater Crescent778 m away | 44 m² | 64 m² | +20 m² +45% | 2012 |
| 24, Derwent Avenue948 m away | 101 m² | 120 m² | +19 m² +19% | 2016 |
| 103, Beechburn Park643 m away | 107 m² | 126 m² | +19 m² +18% | 2014 |
| 2, Steward Drive983 m away | 102 m² | 119 m² | +17 m² +17% | 2014 |
| 3, Beechburn Park571 m away | 91 m² | 107 m² | +16 m² +18% | 2021 |
| 37, Scafell Gardens831 m away | 63 m² | 79 m² | +16 m² +25% | 2015 |
| 22, Beechburn Park571 m away | 72 m² | 87 m² | +15 m² +21% | 2017 |
| 11, Holly Terrace825 m away | 76 m² | 91 m² | +15 m² +20% | 2011 |
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.