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 CF83 1ED
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 |
|---|---|---|---|---|
| Bryngolwg, Watford Road588 m away | 164 m² | 270 m² | +106 m² +65% | 2024 |
| 44, Mountain Road640 m away | 152 m² | 228 m² | +76 m² +50% | 2024 |
| 6, Dan Y Coed754 m away | 81 m² | 149 m² | +68 m² +84% | 2024 |
| Mapledene, 10, Dan Y Coed754 m away | 86 m² | 141 m² | +55 m² +64% | 2020 |
| 5, Heol Ganol870 m away | 87 m² | 140 m² | +53 m² +61% | 2025 |
| 18, Station Terrace533 m away | 161 m² | 213 m² | +52 m² +32% | 2026 |
| The Ferns, Watford Road588 m away | 245 m² | 297 m² | +52 m² +21% | 2016 |
| Colinton, St Martins Crescent149 m away | 152 m² | 203 m² | +51 m² +34% | 2023 |
| 42, Van Road794 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 |
| 103 m² |
| +50 m² +94% |
| 2023 |
| 13, Lon Fawr656 m away | 58 m² | 105 m² | +47 m² +81% | 2022 |
|---|
| 18, Underwood788 m away | 89 m² | 136 m² | +47 m² +53% | 2020 |
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| 14, Lon Uchaf612 m away | 70 m² | 112 m² | +42 m² +60% | 2022 |
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| 18, Lon Isaf650 m away | 71 m² | 109 m² | +38 m² +54% | 2010 |
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| 116, St Christophers Drive295 m away | 83 m² | 120 m² | +37 m² +45% | 2025 |
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| 10, Warren Drive712 m away | 97 m² | 134 m² | +37 m² +38% | 2023 |
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| 31a, Van Road777 m away | 132 m² | 165 m² | +33 m² +25% | 2014 |
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| 46, Mountain Road640 m away | 171 m² | 202 m² | +31 m² +18% | 2013 |
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| 4, Heol Y Cwm647 m away | 76 m² | 106 m² | +30 m² +39% | 2024 |
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| 91, Claude Road323 m away | 38 m² | 67 m² | +29 m² +76% | 2019 |
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| 33, Heol Trecastell589 m away | 76 m² | 103 m² | +27 m² +36% | 2025 |
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| 47, Ludlow Street406 m away | 81 m² | 108 m² | +27 m² +33% | 2020 |
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| 35, Bartlett Street528 m away | 82 m² | 108 m² | +26 m² +32% | 2021 |
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| 23, Ludlow Street406 m away | 100 m² | 123 m² | +23 m² +23% | 2025 |
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| 30, White Street639 m away | 66 m² | 89 m² | +23 m² +35% | 2025 |
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| 2, Plas Grug505 m away | 48 m² | 71 m² | +23 m² +48% | 2014 |
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| 20, White Street639 m away | 73 m² | 95 m² | +22 m² +30% | 2025 |
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| 4, White Street639 m away | 73 m² | 95 m² | +22 m² +30% | 2025 |
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| Clovely, Railway Terrace751 m away | 85 m² | 107 m² | +22 m² +26% | 2023 |
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| 6, Rhymney Terrace355 m away | 95 m² | 116 m² | +21 m² +22% | 2025 |
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| 40, Princes Avenue710 m away | 90 m² | 111 m² | +21 m² +23% | 2025 |
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| 46, Ffordd Erw850 m away | 81 m² | 102 m² | +21 m² +26% | 2023 |
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| 134, Nantgarw Road819 m away | 67 m² | 88 m² | +21 m² +31% | 2022 |
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| 39, Heol Y Felin957 m away | 107 m² | 128 m² | +21 m² +20% | 2013 |
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| 40, Nantgarw Road983 m away | 75 m² | 95 m² | +20 m² +27% | 2025 |
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| 6, Lon Uchaf612 m away | 70 m² | 90 m² | +20 m² +29% | 2021 |
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| 3, White Street639 m away | 88 m² | 108 m² | +20 m² +23% | 2021 |
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| 6, King Edward Avenue491 m away | 95 m² | 115 m² | +20 m² +21% | 2014 |
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| 152, Maes Glas874 m away | 84 m² | 103 m² | +19 m² +23% | 2023 |
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| 14, Lon Y Rhedyn841 m away | 81 m² | 100 m² | +19 m² +23% | 2014 |
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| 106, Bartlett Street723 m away | 96 m² | 114 m² | +18 m² +19% | 2025 |
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| 15, Bradford Street364 m away | 79 m² | 97 m² | +18 m² +23% | 2016 |
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| 64, Bartlett Street621 m away | 74 m² | 92 m² | +18 m² +24% | 2015 |
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| 159, Nantgarw Road730 m away | 62 m² | 78 m² | +16 m² +26% | 2025 |
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| 6, White Street639 m away | 75 m² | 91 m² | +16 m² +21% | 2023 |
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| 16, Redbrook Court0 m away | 103 m² | 119 m² | +16 m² +16% | 2014 |
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| 112, St Martins Road301 m away | 88 m² | 104 m² | +16 m² +18% | 2014 |
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| 98, Bartlett Street723 m away | 81 m² | 97 m² | +16 m² +20% | 2012 |
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| 99, Bartlett Street723 m away | 76 m² | 92 m² | +16 m² +21% | 2011 |
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| 16, Stockland Street484 m away | 77 m² | 92 m² | +15 m² +19% | 2025 |
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| 86, St Martins Road301 m away | 97 m² | 112 m² | +15 m² +15% | 2023 |
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| 42, Rowland Drive899 m away | 72 m² | 87 m² | +15 m² +21% | 2023 |
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