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 DE21 4AE
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 |
|---|---|---|---|---|
| 114, Belper Road944 m away | 116 m² | 276 m² | +160 m² +138% | 2020 |
| 108, Belper Road944 m away | 118 m² | 238 m² | +120 m² +102% | 2025 |
| 7, Bank View Road891 m away | 90 m² | 206 m² | +116 m² +129% | 2024 |
| 91, Belper Road988 m away | 248 m² | 352 m² | +104 m² +42% | 2024 |
| 48, Darley Park Road823 m away | 108 m² | 209 m² | +101 m² +94% | 2022 |
| The Bungalow, Folly Road470 m away | 92 m² | 161 m² | +69 m² +75% | 2025 |
| 62, Chester Green Road637 m away | 193 m² | 259 m² | +66 m² +34% | 2026 |
| 282, Duffield Road976 m away | 118 m² | 178 m² | +60 m² +51% | 2014 |
| 17, Magnus Court391 m away |
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.
| 53 m² |
| 113 m² |
| +60 m² +113% |
| 2010 |
| 15, Magnus Court391 m away | 53 m² | 113 m² | +60 m² +113% | 2010 |
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| 27a, Darley Park Road823 m away | 76 m² | 127 m² | +51 m² +67% | 2025 |
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| 15, Church Lane988 m away | 207 m² | 255 m² | +48 m² +23% | 2022 |
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| 24, Saltburn Close825 m away | 87 m² | 134 m² | +47 m² +54% | 2025 |
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| 49, Church Lane988 m away | 83 m² | 128 m² | +45 m² +54% | 2026 |
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| 4, Weirfield Road850 m away | 73 m² | 114 m² | +41 m² +56% | 2019 |
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| 23, Windley Crescent903 m away | 91 m² | 131 m² | +40 m² +44% | 2026 |
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| 256, Duffield Road976 m away | 123 m² | 163 m² | +40 m² +33% | 2020 |
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| Riverside House, Folly Road470 m away | 109 m² | 145 m² | +36 m² +33% | 2025 |
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| 3, Auriga Court500 m away | 36 m² | 69 m² | +33 m² +92% | 2020 |
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| 5, Haslams Lane560 m away | 88 m² | 120 m² | +32 m² +36% | 2018 |
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| 54, Windley Crescent930 m away | 87 m² | 116 m² | +29 m² +33% | 2023 |
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| Apartment 7, Roman Court, Caesar Street726 m away | 58 m² | 86 m² | +28 m² +48% | 2024 |
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| 10, Vicarwood Avenue951 m away | 169 m² | 197 m² | +28 m² +17% | 2019 |
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| 43, Magnus Court391 m away | 53 m² | 79 m² | +26 m² +49% | 2021 |
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| 4, Etruria Gardens956 m away | 25 m² | 51 m² | +26 m² +104% | 2011 |
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| 15a, Weirfield Road850 m away | 86 m² | 111 m² | +25 m² +29% | 2026 |
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| 2, Old Chester Road556 m away | 99 m² | 124 m² | +25 m² +25% | 2025 |
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| 6, Old Lane778 m away | 105 m² | 128 m² | +23 m² +22% | 2023 |
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| 31, Moray Walk805 m away | 49 m² | 71 m² | +22 m² +45% | 2023 |
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| 92, Chester Green Road637 m away | 72 m² | 94 m² | +22 m² +31% | 2022 |
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| 18, Otter Street997 m away | 146 m² | 168 m² | +22 m² +15% | 2021 |
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| Apartment 11, Roman Court, Caesar Street726 m away | 62 m² | 83 m² | +21 m² +34% | 2025 |
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| Apartment 14, Roman Court, Caesar Street726 m away | 62 m² | 83 m² | +21 m² +34% | 2022 |
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| 3, Magnus Court391 m away | 53 m² | 73 m² | +20 m² +38% | 2011 |
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| 12, Weirfield Road850 m away | 90 m² | 109 m² | +19 m² +21% | 2026 |
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| 22, Otter Street997 m away | 119 m² | 138 m² | +19 m² +16% | 2025 |
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| 14, Auriga Court500 m away | 84 m² | 103 m² | +19 m² +23% | 2019 |
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| 2b, Weirfield Road850 m away | 66 m² | 84 m² | +18 m² +27% | 2024 |
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| 9, Weirfield Road850 m away | 84 m² | 102 m² | +18 m² +21% | 2022 |
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| 244, Duffield Road932 m away | 97 m² | 115 m² | +18 m² +19% | 2020 |
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| 7, Magnus Court391 m away | 53 m² | 70 m² | +17 m² +32% | 2020 |
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| 21, Magnus Court391 m away | 53 m² | 70 m² | +17 m² +32% | 2011 |
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| 23, Magnus Court391 m away | 53 m² | 69 m² | +16 m² +30% | 2020 |
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| 12, The Square716 m away | 83 m² | 99 m² | +16 m² +19% | 2019 |
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| 5a, Old Lane778 m away | 98 m² | 114 m² | +16 m² +16% | 2018 |
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| 34, Camp Street564 m away | 70 m² | 86 m² | +16 m² +23% | 2017 |
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| The Knoll, 159, Duffield Road991 m away | 64 m² | 80 m² | +16 m² +25% | 2009 |
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| 53, Magnus Court391 m away | 53 m² | 68 m² | +15 m² +28% | 2024 |
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| 25a, Windley Crescent903 m away | 74 m² | 89 m² | +15 m² +20% | 2022 |
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| 77, Radnor Street958 m away | 52 m² | 67 m² | +15 m² +29% | 2018 |
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| 93, Scarborough Rise739 m away | 70 m² | 85 m² | +15 m² +21% | 2015 |
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