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 SA1 8LN
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 |
|---|---|---|---|---|
| 107, Marcroft Road362 m away | 86 m² | 172 m² | +86 m² +100% | 2021 |
| 123, Wern Fawr Road0 m away | 55 m² | 103 m² | +48 m² +87% | 2013 |
| 133, Langdon Road757 m away | 147 m² | 179 m² | +32 m² +22% | 2020 |
| 59, Marcroft Road362 m away | 75 m² | 105 m² | +30 m² +40% | 2021 |
| 38, Danygraig Road679 m away | 79 m² | 109 m² | +30 m² +38% | 2014 |
| 3, Margaret Street894 m away | 106 m² | 133 m² | +27 m² +25% | 2025 |
| 31, Ysgol Street412 m away | 98 m² | 124 m² | +26 m² +27% | 2017 |
| 19, Ysgol Street412 m away | 87 m² | 112 m² | +25 m² +29% | 2025 |
| 48, Baglan Street535 m away | 93 m² | 118 m² | +25 m² +27% | 2023 |
| 117, Port Tennant Road926 m away | 105 m² | 130 m² | +25 m² +24% | 2016 |
| 229, Port Tennant Road671 m away | 46 m² | 69 m² | +23 m² +50% | 2026 |
| 20, Danygraig Road800 m away | 150 m² | 173 m² | +23 m² +15% | 2024 |
| 27, Marcroft Road396 m away | 75 m² | 97 m² | +22 m² +29% | 2020 |
| 94, Ysgol Street459 m away | 104 m² | 125 m² | +21 m² +20% | 2024 |
| 22, Grafog Street161 m away | 66 m² | 87 m² | +21 m² +32% | 2023 |
| 46, Tymawr Street256 m away | 85 m² | 106 m² | +21 m² +25% | 2014 |
| 117, Wern Fawr Road0 m away | 77 m² | 96 m² | +19 m² +25% | 2025 |
| 29, Marcroft Road396 m away | 75 m² | 94 m² | +19 m² +25% | 2020 |
| 24, Jersey Terrace450 m away | 106 m² | 124 m² | +18 m² +17% | 2023 |
| 86, Wern Terrace203 m away | 97 m² | 114 m² | +17 m² +18% | 2023 |
| 8, Wern Terrace203 m away | 73 m² | 90 m² | +17 m² +23% | 2020 |
| 42, Gelli Street197 m away | 105 m² | 121 m² | +16 m² +15% | 2014 |
| 59, Wern Fawr Road204 m away | 90 m² | 105 m² | +15 m² +17% | 2018 |
| 4, Ysgol Street459 m away | 85 m² | 100 m² | +15 m² +18% | 2015 |
| 21, Tymawr Street256 m away | 93 m² | 108 m² | +15 m² +16% | 2014 |
| 8, Ruston Road226 m away | 57 m² | 72 m² | +15 m² +26% | 2010 |
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.