Finding extended homes…
These only choose where you start. Every page and every lens is still one tap away.
Sign in to keep them on every device →Finding extended homes…
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 CF11 9EJ
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 |
|---|---|---|---|---|
| 173, Cathedral Road433 m away | 166 m² | 342 m² | +176 m² +106% | 2016 |
| 93, Cathedral Road287 m away | 116 m² | 280 m² | +164 m² +141% | 2023 |
| 2a, William Street617 m away | 72 m² | 179 m² | +107 m² +149% | 2022 |
| 23, Pontcanna Place627 m away | 78 m² | 175 m² | +97 m² +124% | 2025 |
| 15, Green Street762 m away | 75 m² | 161 m² | +86 m² +115% | 2025 |
| 47, Talbot Street259 m away | 155 m² | 239 m² | +84 m² +54% | 2018 |
| 21, Brunswick Street572 m away | 97 m² | 181 m² | +84 m² +87% | 2014 |
| 8, Clare Gardens865 m away | 127 m² | 199 m² | +72 m² +57% | 2026 |
| 5, Dyfrig Street433 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.
| 64 m² |
| 134 m² |
| +70 m² +109% |
| 2008 |
| 20, Brook Street897 m away | 120 m² | 188 m² | +68 m² +57% | 2023 |
|---|
| 12, Kyveilog Street477 m away | 76 m² | 142 m² | +66 m² +87% | 2019 |
|---|
| 122, Severn Grove517 m away | 128 m² | 193 m² | +65 m² +51% | 2015 |
|---|
| 23, Teilo Street641 m away | 82 m² | 147 m² | +65 m² +79% | 2015 |
|---|
| Cwrt Soffia, 47 - 53, Cathedral Road332 m away | 66 m² | 128 m² | +62 m² +94% | 2008 |
|---|
| 78, Plasturton Avenue401 m away | 74 m² | 135 m² | +61 m² +82% | 2024 |
|---|
| 62, Neville Street756 m away | 65 m² | 123 m² | +58 m² +89% | 2022 |
|---|
| 24, Wells Street557 m away | 178 m² | 236 m² | +58 m² +33% | 2020 |
|---|
| 25a, Neville Street613 m away | 139 m² | 197 m² | +58 m² +42% | 2014 |
|---|
| 14, St Johns Crescent475 m away | 121 m² | 178 m² | +57 m² +47% | 2012 |
|---|
| 23, York Street819 m away | 74 m² | 128 m² | +54 m² +73% | 2024 |
|---|
| 3, Carmarthen Street499 m away | 79 m² | 132 m² | +53 m² +67% | 2014 |
|---|
| 33, Penhill Road730 m away | 84 m² | 137 m² | +53 m² +63% | 2009 |
|---|
| 66, Neville Street756 m away | 77 m² | 129 m² | +52 m² +68% | 2021 |
|---|
| 29, Lansdowne Road741 m away | 63 m² | 114 m² | +51 m² +81% | 2018 |
|---|
| 6, Clare Gardens865 m away | 160 m² | 211 m² | +51 m² +32% | 2016 |
|---|
| 127, Llandaff Road471 m away | 122 m² | 172 m² | +50 m² +41% | 2024 |
|---|
| 23, Cae Syr Dafydd716 m away | 70 m² | 120 m² | +50 m² +71% | 2014 |
|---|
| 60, Cathedral Road373 m away | 43 m² | 93 m² | +50 m² +116% | 2013 |
|---|
| 54, Neville Street578 m away | 79 m² | 129 m² | +50 m² +63% | 2008 |
|---|
| 45, Atlas Road683 m away | 177 m² | 226 m² | +49 m² +28% | 2020 |
|---|
| 7, Ryder Street243 m away | 160 m² | 208 m² | +48 m² +30% | 2023 |
|---|
| 1, Berthwin Street504 m away | 61 m² | 109 m² | +48 m² +79% | 2021 |
|---|
| 19, Gileston Road661 m away | 125 m² | 173 m² | +48 m² +38% | 2019 |
|---|
| 31, Craddock Street845 m away | 88 m² | 135 m² | +47 m² +53% | 2024 |
|---|
| 33, Teilo Street641 m away | 156 m² | 202 m² | +46 m² +29% | 2026 |
|---|
| 51, Lansdowne Road741 m away | 83 m² | 129 m² | +46 m² +55% | 2019 |
|---|
| 7, Wembley Road871 m away | 70 m² | 115 m² | +45 m² +64% | 2015 |
|---|
| Flat 4, 78, Cathedral Road345 m away | 75 m² | 118 m² | +43 m² +57% | 2023 |
|---|
| 18, Egerton Street814 m away | 75 m² | 118 m² | +43 m² +57% | 2020 |
|---|
| 76, Wyndham Crescent32 m away | 182 m² | 225 m² | +43 m² +24% | 2016 |
|---|
| 42, Plasturton Gardens235 m away | 212 m² | 254 m² | +42 m² +20% | 2025 |
|---|
| 76, Cathedral Road345 m away | 41 m² | 83 m² | +42 m² +102% | 2022 |
|---|
| 11, Clare Gardens865 m away | 29 m² | 71 m² | +42 m² +145% | 2017 |
|---|
| 82, Ninian Park Road747 m away | 67 m² | 108 m² | +41 m² +61% | 2024 |
|---|
| Apartment 8, The Hamilton'S, Cathedral Road467 m away | 67 m² | 108 m² | +41 m² +61% | 2023 |
|---|
| 5, Egerton Street839 m away | 101 m² | 142 m² | +41 m² +41% | 2011 |
|---|
| 21, Wyndham Road0 m away | 91 m² | 130 m² | +39 m² +43% | 2026 |
|---|
| 100, Severn Grove517 m away | 141 m² | 180 m² | +39 m² +28% | 2025 |
|---|
| The Croft, Llandaff Road730 m away | 220 m² | 259 m² | +39 m² +18% | 2021 |
|---|
| 40, Beauchamp Street979 m away | 45 m² | 84 m² | +39 m² +87% | 2008 |
|---|
| 101, Ninian Park Road784 m away | 29 m² | 67 m² | +38 m² +131% | 2020 |
|---|
| 7, Thurston Street724 m away | 61 m² | 99 m² | +38 m² +62% | 2018 |
|---|
| 33, Lansdowne Road741 m away | 77 m² | 115 m² | +38 m² +49% | 2010 |
|---|
| 67, Fairleigh Road741 m away | 95 m² | 132 m² | +37 m² +39% | 2023 |
|---|
| 15, Fields Park Road770 m away | 172 m² | 209 m² | +37 m² +22% | 2022 |
|---|
| 16, Neville Street578 m away | 43 m² | 80 m² | +37 m² +86% | 2009 |
|---|
| 39, Market Road462 m away | 94 m² | 130 m² | +36 m² +38% | 2022 |
|---|
| 29, Rennie Street624 m away | 93 m² | 129 m² | +36 m² +39% | 2016 |
|---|
| 75, Romilly Crescent413 m away | 150 m² | 186 m² | +36 m² +24% | 2014 |
|---|
| 201, Cathedral Road504 m away | 61 m² | 97 m² | +36 m² +59% | 2014 |
|---|
| 1, Tintern Street827 m away | 66 m² | 102 m² | +36 m² +55% | 2012 |
|---|
| Flat 2, 38, Glamorgan Street530 m away | 43 m² | 79 m² | +36 m² +84% | 2010 |
|---|
| 55 - 57, Despenser Street936 m away | 32 m² | 67 m² | +35 m² +109% | 2026 |
|---|
| 112, Pembroke Road793 m away | 89 m² | 124 m² | +35 m² +39% | 2024 |
|---|
| 136b, Llandaff Road625 m away | 104 m² | 139 m² | +35 m² +34% | 2019 |
|---|
| 190, Cathedral Road563 m away | 53 m² | 88 m² | +35 m² +66% | 2010 |
|---|
| 13, Fairleigh Road850 m away | 118 m² | 152 m² | +34 m² +29% | 2025 |
|---|
| 29, Plasturton Gardens153 m away | 141 m² | 175 m² | +34 m² +24% | 2021 |
|---|
| 37, Severn Grove411 m away | 48 m² | 82 m² | +34 m² +71% | 2021 |
|---|
| 27, Neville Street613 m away | 193 m² | 227 m² | +34 m² +18% | 2021 |
|---|
| 6, Clare Street998 m away | 39 m² | 73 m² | +34 m² +87% | 2009 |
|---|
| 67, Plasturton Avenue352 m away | 171 m² | 204 m² | +33 m² +19% | 2023 |
|---|
| 51, Canton Court361 m away | 50 m² | 83 m² | +33 m² +66% | 2023 |
|---|
| 15, Despenser Street936 m away | 142 m² | 175 m² | +33 m² +23% | 2023 |
|---|
| 1, Leckwith Close926 m away | 63 m² | 96 m² | +33 m² +52% | 2022 |
|---|
| 97, Kings Road68 m away | 149 m² | 182 m² | +33 m² +22% | 2021 |
|---|
| 1a, Teilo Street641 m away | 144 m² | 177 m² | +33 m² +23% | 2020 |
|---|
| 105, Cowbridge Road East550 m away | 96 m² | 129 m² | +33 m² +34% | 2019 |
|---|
| 324, Cowbridge Road East972 m away | 37 m² | 70 m² | +33 m² +89% | 2018 |
|---|
| 68, Cathedral Road373 m away | 42 m² | 75 m² | +33 m² +79% | 2016 |
|---|
| Flat 28, Edinburgh Court, Wyndham Place542 m away | 34 m² | 67 m² | +33 m² +97% | 2013 |
|---|
| 29, Rectory Road494 m away | 46 m² | 79 m² | +33 m² +72% | 2012 |
|---|
| 108, Wyndham Road112 m away | 93 m² | 126 m² | +33 m² +35% | 2011 |
|---|
| 6, Hamilton Street327 m away | 134 m² | 167 m² | +33 m² +25% | 2009 |
|---|
| 290, Cowbridge Road East867 m away | 46 m² | 79 m² | +33 m² +72% | 2009 |
|---|
| 292, Cowbridge Road East867 m away | 46 m² | 79 m² | +33 m² +72% | 2009 |
|---|
| 12, Preswylfa Street946 m away | 93 m² | 125 m² | +32 m² +34% | 2026 |
|---|
| Flat 1, Kings Mews, Kings Road252 m away | 35 m² | 67 m² | +32 m² +91% | 2025 |
|---|
| 29, Wembley Road871 m away | 92 m² | 124 m² | +32 m² +35% | 2025 |
|---|
| Flat 4, 86, Cathedral Road345 m away | 55 m² | 87 m² | +32 m² +58% | 2021 |
|---|
| 119, Cathedral Road315 m away | 53 m² | 85 m² | +32 m² +60% | 2020 |
|---|
| 30, Wells Street557 m away | 84 m² | 116 m² | +32 m² +38% | 2014 |
|---|
| 26, De Burgh Street676 m away | 123 m² | 155 m² | +32 m² +26% | 2009 |
|---|
| 35, Pen Y Peel Road634 m away | 82 m² | 113 m² | +31 m² +38% | 2023 |
|---|
| 12, Hamilton Street327 m away | 141 m² | 172 m² | +31 m² +22% | 2022 |
|---|
| 22, Canton Court359 m away | 94 m² | 125 m² | +31 m² +33% | 2014 |
|---|
| 92, Wyndham Crescent32 m away | 57 m² | 88 m² | +31 m² +54% | 2013 |
|---|
| 13, Despenser Street936 m away | 139 m² | 170 m² | +31 m² +22% | 2013 |
|---|
| 29, Pontcanna Street366 m away | 122 m² | 152 m² | +30 m² +25% | 2020 |
|---|
| 1, Penhill Road682 m away | 58 m² | 88 m² | +30 m² +52% | 2019 |
|---|
| 41, Kings Road141 m away | 61 m² | 91 m² | +30 m² +49% | 2017 |
|---|
| 31, Hamilton Street327 m away | 130 m² | 160 m² | +30 m² +23% | 2017 |
|---|
| 26, Romilly Road947 m away | 57 m² | 87 m² | +30 m² +53% | 2010 |
|---|
| 9, Wyndham Road0 m away | 91 m² | 120 m² | +29 m² +32% | 2025 |
|---|
| 27, Brook Street845 m away | 99 m² | 128 m² | +29 m² +29% | 2025 |
|---|
| 11, Wyndham Place478 m away | 84 m² | 113 m² | +29 m² +35% | 2022 |
|---|
| 3, Egham Street899 m away | 99 m² | 128 m² | +29 m² +29% | 2022 |
|---|
| 36, Wyndham Road0 m away | 78 m² | 107 m² | +29 m² +37% | 2020 |
|---|
| 24, Llanfair Road531 m away | 106 m² | 135 m² | +29 m² +27% | 2016 |
|---|
| 47, Pontcanna Street466 m away | 124 m² | 153 m² | +29 m² +23% | 2015 |
|---|
| 28, Major Road535 m away | 108 m² | 136 m² | +28 m² +26% | 2026 |
|---|
| 16, Lansdowne Road740 m away | 130 m² | 158 m² | +28 m² +22% | 2026 |
|---|
| 34, Brook Street897 m away | 45 m² | 73 m² | +28 m² +62% | 2025 |
|---|
| 11, Hamilton Street327 m away | 136 m² | 164 m² | +28 m² +21% | 2021 |
|---|
| 7, Beda Road678 m away | 94 m² | 122 m² | +28 m² +30% | 2020 |
|---|
| 19, Bartley Wilson Way979 m away | 110 m² | 138 m² | +28 m² +25% | 2020 |
|---|
| 95c, Severn Grove517 m away | 28 m² | 56 m² | +28 m² +100% | 2011 |
|---|
| 18, Glamorgan Street530 m away | 79 m² | 106 m² | +27 m² +34% | 2025 |
|---|
| 16, Romilly Crescent323 m away | 69 m² | 96 m² | +27 m² +39% | 2024 |
|---|
| 38, Lower Cathedral Road728 m away | 54 m² | 81 m² | +27 m² +50% | 2010 |
|---|
| 36, Beda Road758 m away | 54 m² | 81 m² | +27 m² +50% | 2009 |
|---|
| 11, Cumberland Street632 m away | 97 m² | 123 m² | +26 m² +27% | 2021 |
|---|
| 90, Wyndham Crescent32 m away | 63 m² | 89 m² | +26 m² +41% | 2020 |
|---|
| 28, Alexandra Road500 m away | 88 m² | 114 m² | +26 m² +30% | 2017 |
|---|
| 64, Theobald Road745 m away | 91 m² | 117 m² | +26 m² +29% | 2016 |
|---|
| 3, Fields Park Road770 m away | 153 m² | 179 m² | +26 m² +17% | 2011 |
|---|
| 11, Bloom Street678 m away | 76 m² | 101 m² | +25 m² +33% | 2025 |
|---|
| 18, Carmarthen Street441 m away | 80 m² | 105 m² | +25 m² +31% | 2024 |
|---|
| 7, Mortimer Road564 m away | 87 m² | 112 m² | +25 m² +29% | 2024 |
|---|
| 62, Kings Road97 m away | 128 m² | 153 m² | +25 m² +20% | 2023 |
|---|
| 52, Beda Road758 m away | 109 m² | 134 m² | +25 m² +23% | 2023 |
|---|
| 16, Telford Street752 m away | 89 m² | 114 m² | +25 m² +28% | 2022 |
|---|
| 14, Cumberland Street632 m away | 62 m² | 87 m² | +25 m² +40% | 2019 |
|---|
| 6, Library Street368 m away | 129 m² | 154 m² | +25 m² +19% | 2018 |
|---|
| 59, Romilly Crescent413 m away | 70 m² | 95 m² | +25 m² +36% | 2018 |
|---|
| 128, Severn Grove517 m away | 49 m² | 74 m² | +25 m² +51% | 2013 |
|---|
| 30, Brecon Street778 m away | 100 m² | 125 m² | +25 m² +25% | 2013 |
|---|
| 73, Kings Road68 m away | 63 m² | 88 m² | +25 m² +40% | 2011 |
|---|
| 2, Church Road396 m away | 129 m² | 153 m² | +24 m² +19% | 2026 |
|---|
| 33b, Fields Park Road770 m away | 52 m² | 76 m² | +24 m² +46% | 2025 |
|---|
| 99, Fairleigh Road741 m away | 83 m² | 107 m² | +24 m² +29% | 2024 |
|---|
| 10, Rawden Place674 m away | 123 m² | 147 m² | +24 m² +20% | 2023 |
|---|
| 4, Rawden Place674 m away | 119 m² | 143 m² | +24 m² +20% | 2023 |
|---|
| 49, Bartley Wilson Way979 m away | 59 m² | 83 m² | +24 m² +41% | 2022 |
|---|
| 4, Cardigan Court589 m away | 46 m² | 70 m² | +24 m² +52% | 2021 |
|---|
| 51, Brook Street845 m away | 40 m² | 64 m² | +24 m² +60% | 2019 |
|---|
| 51, Plasturton Avenue236 m away | 153 m² | 177 m² | +24 m² +16% | 2017 |
|---|
| 21, Penhill Road730 m away | 62 m² | 86 m² | +24 m² +39% | 2016 |
|---|
| 5, Mortimer Road564 m away | 102 m² | 126 m² | +24 m² +24% | 2011 |
|---|
| 3, Bloom Street678 m away | 71 m² | 94 m² | +23 m² +32% | 2026 |
|---|
| 73, Wells Street648 m away | 90 m² | 113 m² | +23 m² +26% | 2025 |
|---|
| 17, Clare Street942 m away | 30 m² | 53 m² | +23 m² +77% | 2024 |
|---|
| 4, Leckwith Mews831 m away | 141 m² | 163 m² | +22 m² +16% | 2026 |
|---|
| Flat 1, Conway Court, 18, Penhill Road730 m away | 117 m² | 139 m² | +22 m² +19% | 2025 |
|---|
| 11, Leckwith Place719 m away | 94 m² | 116 m² | +22 m² +23% | 2022 |
|---|
| 33, West Lee547 m away | 58 m² | 80 m² | +22 m² +38% | 2021 |
|---|
| 27, Ninian Park Road942 m away | 96 m² | 118 m² | +22 m² +23% | 2020 |
|---|
| 34, Wyndham Crescent166 m away | 101 m² | 123 m² | +22 m² +22% | 2016 |
|---|
| 16, Conway Road454 m away | 59 m² | 81 m² | +22 m² +37% | 2014 |
|---|
| 1, Egerton Mews839 m away | 87 m² | 109 m² | +22 m² +25% | 2012 |
|---|
| 67, Romilly Crescent413 m away | 16 m² | 38 m² | +22 m² +138% | 2010 |
|---|
| 139, Cathedral Road365 m away | 24 m² | 46 m² | +22 m² +92% | 2009 |
|---|
| 119, Romilly Road947 m away | 15 m² | 37 m² | +22 m² +147% | 2009 |
|---|
| 2, Fairleigh Road850 m away | 107 m² | 128 m² | +21 m² +20% | 2025 |
|---|
| 5, Craddock Street845 m away | 78 m² | 99 m² | +21 m² +27% | 2024 |
|---|
| 70, Hamilton Street256 m away | 124 m² | 145 m² | +21 m² +17% | 2023 |
|---|
| 10, Wyndham Place478 m away | 92 m² | 113 m² | +21 m² +23% | 2022 |
|---|
| 37, Talbot Street259 m away | 136 m² | 157 m² | +21 m² +15% | 2021 |
|---|
| 14, Grosvenor Street938 m away | 46 m² | 67 m² | +21 m² +46% | 2021 |
|---|
| Flat 9, Caernarvon Court, Conway Road579 m away | 44 m² | 65 m² | +21 m² +48% | 2020 |
|---|
| Coach House, 122a, Pembroke Road793 m away | 78 m² | 99 m² | +21 m² +27% | 2019 |
|---|
| 12, Ninian Park Road935 m away | 40 m² | 61 m² | +21 m² +53% | 2017 |
|---|
| 95, Cathedral Road287 m away | 51 m² | 72 m² | +21 m² +41% | 2015 |
|---|
| 6, Ryder Street430 m away | 129 m² | 150 m² | +21 m² +16% | 2015 |
|---|
| 3 - 5, Brook Street845 m away | 59 m² | 80 m² | +21 m² +36% | 2015 |
|---|
| 32, Rectory Road494 m away | 102 m² | 123 m² | +21 m² +21% | 2014 |
|---|
| 11, Eton Place530 m away | 111 m² | 132 m² | +21 m² +19% | 2014 |
|---|
| 50, Alexandra Road616 m away | 74 m² | 94 m² | +20 m² +27% | 2026 |
|---|
| Apartment 13, Cathedral House, Hamilton Street446 m away | 96 m² | 116 m² | +20 m² +21% | 2025 |
|---|
| 13, Anglesey Street658 m away | 88 m² | 108 m² | +20 m² +23% | 2025 |
|---|
| 28, Brecon Street778 m away | 91 m² | 111 m² | +20 m² +22% | 2023 |
|---|
| 74, Llanfair Road666 m away | 112 m² | 132 m² | +20 m² +18% | 2022 |
|---|
| 11, Maldwyn Street701 m away | 120 m² | 140 m² | +20 m² +17% | 2021 |
|---|
| 32, Carmarthen Street499 m away | 76 m² | 96 m² | +20 m² +26% | 2020 |
|---|
| Flat 1, 30, Brook Street897 m away | 53 m² | 73 m² | +20 m² +38% | 2020 |
|---|
| 6, Glamorgan Street Mews558 m away | 54 m² | 74 m² | +20 m² +37% | 2019 |
|---|
| 10, Earle Place425 m away | 113 m² | 133 m² | +20 m² +18% | 2014 |
|---|
| 6, St Johns Crescent475 m away | 35 m² | 55 m² | +20 m² +57% | 2013 |
|---|
| 195, Cathedral Road504 m away | 48 m² | 68 m² | +20 m² +42% | 2009 |
|---|
| 15, Grosvenor Street938 m away | 110 m² | 129 m² | +19 m² +17% | 2026 |
|---|
| 15b, Clive Road939 m away | 63 m² | 82 m² | +19 m² +30% | 2026 |
|---|
| 79, Bartley Wilson Way979 m away | 76 m² | 95 m² | +19 m² +25% | 2023 |
|---|
| 121, Ninian Park Road784 m away | 103 m² | 122 m² | +19 m² +18% | 2022 |
|---|
| 54, Broad Street902 m away | 65 m² | 84 m² | +19 m² +29% | 2022 |
|---|
| 40, Severn Grove246 m away | 97 m² | 116 m² | +19 m² +20% | 2021 |
|---|
| 16, Leckwith Road459 m away | 113 m² | 132 m² | +19 m² +17% | 2021 |
|---|
| 32, Chancery Lane541 m away | 76 m² | 95 m² | +19 m² +25% | 2021 |
|---|
| 43, Wyndham Street575 m away | 68 m² | 87 m² | +19 m² +28% | 2020 |
|---|
| 11, Turberville Place232 m away | 120 m² | 139 m² | +19 m² +16% | 2019 |
|---|
| 43, Radnor Road715 m away | 79 m² | 98 m² | +19 m² +24% | 2019 |
|---|