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 8LF
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 Road763 m away | 86 m² | 172 m² | +86 m² +100% | 2021 |
| 70, Port Tennant Road757 m away | 69 m² | 146 m² | +77 m² +112% | 2022 |
| 17, Kinley Street681 m away | 39 m² | 87 m² | +48 m² +123% | 2014 |
| 123, Wern Fawr Road412 m away | 55 m² | 103 m² | +48 m² +87% | 2013 |
| 71, Port Tennant Road615 m away | 108 m² | 143 m² | +35 m² +32% | 2016 |
| 133, Langdon Road407 m away | 147 m² | 179 m² | +32 m² +22% | 2020 |
| 59, Marcroft Road763 m away | 75 m² | 105 m² | +30 m² +40% | 2021 |
| 38, Danygraig Road267 m away | 79 m² | 109 m² | +30 m² +38% | 2014 |
| 11, Middleton Street588 m away | 92 m² | 121 m² | +29 m² +32% | 2021 |
| 3, Margaret Street482 m away | 106 m² | 133 m² | +27 m² +25% | 2025 |
| 31, Ysgol Street0 m away | 98 m² | 124 m² | +26 m² +27% | 2017 |
| 19, Ysgol Street0 m away | 87 m² | 112 m² | +25 m² +29% | 2025 |
| 48, Baglan Street128 m away | 93 m² | 118 m² | +25 m² +27% | 2023 |
| Apartment 121, South Quay, Kings Road993 m away | 52 m² | 77 m² | +25 m² +48% | 2019 |
| Apartment 157, South Quay, Kings Road993 m away | 73 m² | 98 m² | +25 m² +34% | 2019 |
| 117, Port Tennant Road518 m away | 105 m² | 130 m² | +25 m² +24% | 2016 |
| 229, Port Tennant Road286 m away | 46 m² | 69 m² | +23 m² +50% | 2026 |
| 20, Danygraig Road389 m away | 150 m² | 173 m² | +23 m² +15% | 2024 |
| 27, Marcroft Road782 m away | 75 m² | 97 m² | +22 m² +29% | 2020 |
| Apartment 101, South Quay, Kings Road993 m away | 53 m² | 75 m² | +22 m² +42% | 2012 |
| 94, Ysgol Street164 m away | 104 m² | 125 m² | +21 m² +20% | 2024 |
| 22, Grafog Street272 m away | 66 m² | 87 m² | +21 m² +32% | 2023 |
| 46, Tymawr Street159 m away | 85 m² | 106 m² | +21 m² +25% | 2014 |
| 32, Delhi Street998 m away | 66 m² | 86 m² | +20 m² +30% | 2021 |
| 117, Wern Fawr Road412 m away | 77 m² | 96 m² | +19 m² +25% | 2025 |
| 29, Marcroft Road782 m away | 75 m² | 94 m² | +19 m² +25% | 2020 |
| 24, Jersey Terrace41 m away | 106 m² | 124 m² | +18 m² +17% | 2023 |
| 86, Wern Terrace583 m away | 97 m² | 114 m² | +17 m² +18% | 2023 |
| 11, Llys Hafan, Lamberts Road708 m away | 54 m² | 71 m² | +17 m² +31% | 2021 |
| 8, Wern Terrace583 m away | 73 m² | 90 m² | +17 m² +23% | 2020 |
| 42, Gelli Street225 m away | 105 m² | 121 m² | +16 m² +15% | 2014 |
| Apartment 119, South Quay, Kings Road993 m away | 88 m² | 104 m² | +16 m² +18% | 2012 |
| Apartment 103, South Quay, Kings Road993 m away | 83 m² | 98 m² | +15 m² +18% | 2019 |
| Apartment 112, South Quay, Kings Road993 m away | 83 m² | 98 m² | +15 m² +18% | 2019 |
| 59, Wern Fawr Road217 m away | 90 m² | 105 m² | +15 m² +17% | 2018 |
| 4, Ysgol Street164 m away | 85 m² | 100 m² | +15 m² +18% | 2015 |
| 21, Tymawr Street159 m away | 93 m² | 108 m² | +15 m² +16% | 2014 |
| 8, Ruston Road627 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.