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 9NY
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 Road509 m away | 166 m² | 342 m² | +176 m² +106% | 2016 |
| 93, Cathedral Road514 m away | 116 m² | 280 m² | +164 m² +141% | 2023 |
| 29, Romilly Road West859 m away | 125 m² | 278 m² | +153 m² +122% | 2016 |
| 2a, William Street583 m away | 72 m² | 179 m² | +107 m² +149% | 2022 |
| 184, Lansdowne Road784 m away | 109 m² | 212 m² | +103 m² +94% | 2026 |
| 23, Pontcanna Place572 m away | 78 m² | 175 m² | +97 m² +124% | 2025 |
| 15, Green Street989 m away | 75 m² | 161 m² | +86 m² +115% | 2025 |
| 47, Talbot Street512 m away | 155 m² | 239 m² | +84 m² +54% | 2018 |
| 21, Brunswick Street352 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.
| 97 m² |
| 181 m² |
| +84 m² +87% |
| 2014 |
| 28, Broadstairs Road845 m away | 90 m² | 169 m² | +79 m² +88% | 2026 |
|---|
| 34, Broadstairs Road845 m away | 88 m² | 161 m² | +73 m² +83% | 2025 |
|---|
| 30, Broadhaven893 m away | 84 m² | 157 m² | +73 m² +87% | 2023 |
|---|
| 5, Dyfrig Street588 m away | 64 m² | 134 m² | +70 m² +109% | 2008 |
|---|
| 12, Kyveilog Street599 m away | 76 m² | 142 m² | +66 m² +87% | 2019 |
|---|
| 122, Severn Grove465 m away | 128 m² | 193 m² | +65 m² +51% | 2015 |
|---|
| 23, Teilo Street676 m away | 82 m² | 147 m² | +65 m² +79% | 2015 |
|---|
| Cwrt Soffia, 47 - 53, Cathedral Road586 m away | 66 m² | 128 m² | +62 m² +94% | 2008 |
|---|
| 78, Plasturton Avenue454 m away | 74 m² | 135 m² | +61 m² +82% | 2024 |
|---|
| 62, Neville Street953 m away | 65 m² | 123 m² | +58 m² +89% | 2022 |
|---|
| 24, Wells Street642 m away | 178 m² | 236 m² | +58 m² +33% | 2020 |
|---|
| 25a, Neville Street821 m away | 139 m² | 197 m² | +58 m² +42% | 2014 |
|---|
| 22, Surrey Street929 m away | 42 m² | 99 m² | +57 m² +136% | 2015 |
|---|
| 14, St Johns Crescent343 m away | 121 m² | 178 m² | +57 m² +47% | 2012 |
|---|
| 23, York Street578 m away | 74 m² | 128 m² | +54 m² +73% | 2024 |
|---|
| 3, Carmarthen Street244 m away | 79 m² | 132 m² | +53 m² +67% | 2014 |
|---|
| 33, Penhill Road613 m away | 84 m² | 137 m² | +53 m² +63% | 2009 |
|---|
| 66, Neville Street953 m away | 77 m² | 129 m² | +52 m² +68% | 2021 |
|---|
| 29, Lansdowne Road569 m away | 63 m² | 114 m² | +51 m² +81% | 2018 |
|---|
| 127, Llandaff Road259 m away | 122 m² | 172 m² | +50 m² +41% | 2024 |
|---|
| 23, Cae Syr Dafydd525 m away | 70 m² | 120 m² | +50 m² +71% | 2014 |
|---|
| 60, Cathedral Road617 m away | 43 m² | 93 m² | +50 m² +116% | 2013 |
|---|
| 54, Neville Street779 m away | 79 m² | 129 m² | +50 m² +63% | 2008 |
|---|
| 45, Atlas Road563 m away | 177 m² | 226 m² | +49 m² +28% | 2020 |
|---|
| 7, Ryder Street501 m away | 160 m² | 208 m² | +48 m² +30% | 2023 |
|---|
| 1, Berthwin Street608 m away | 61 m² | 109 m² | +48 m² +79% | 2021 |
|---|
| 19, Gileston Road673 m away | 125 m² | 173 m² | +48 m² +38% | 2019 |
|---|
| 33, Teilo Street676 m away | 156 m² | 202 m² | +46 m² +29% | 2026 |
|---|
| 51, Lansdowne Road569 m away | 83 m² | 129 m² | +46 m² +55% | 2019 |
|---|
| 7, Wembley Road625 m away | 70 m² | 115 m² | +45 m² +64% | 2015 |
|---|
| 13, Forrest Road873 m away | 123 m² | 167 m² | +44 m² +36% | 2020 |
|---|
| 481, Cowbridge Road East791 m away | 55 m² | 99 m² | +44 m² +80% | 2012 |
|---|
| Flat 4, 78, Cathedral Road561 m away | 75 m² | 118 m² | +43 m² +57% | 2023 |
|---|
| 18, Egerton Street558 m away | 75 m² | 118 m² | +43 m² +57% | 2020 |
|---|
| 76, Wyndham Crescent241 m away | 182 m² | 225 m² | +43 m² +24% | 2016 |
|---|
| 42, Plasturton Gardens457 m away | 212 m² | 254 m² | +42 m² +20% | 2025 |
|---|
| 76, Cathedral Road561 m away | 41 m² | 83 m² | +42 m² +102% | 2022 |
|---|
| 82, Ninian Park Road849 m away | 67 m² | 108 m² | +41 m² +61% | 2024 |
|---|
| Apartment 8, The Hamilton'S, Cathedral Road722 m away | 67 m² | 108 m² | +41 m² +61% | 2023 |
|---|
| 133, Clive Road870 m away | 47 m² | 88 m² | +41 m² +87% | 2021 |
|---|
| 5, Egerton Street582 m away | 101 m² | 142 m² | +41 m² +41% | 2011 |
|---|
| 47, Conybeare Road958 m away | 122 m² | 162 m² | +40 m² +33% | 2021 |
|---|
| 21, Wyndham Road258 m away | 91 m² | 130 m² | +39 m² +43% | 2026 |
|---|
| 100, Severn Grove465 m away | 141 m² | 180 m² | +39 m² +28% | 2025 |
|---|
| The Croft, Llandaff Road569 m away | 220 m² | 259 m² | +39 m² +18% | 2021 |
|---|
| 101, Ninian Park Road887 m away | 29 m² | 67 m² | +38 m² +131% | 2020 |
|---|
| 7, Thurston Street599 m away | 61 m² | 99 m² | +38 m² +62% | 2018 |
|---|
| 33, Lansdowne Road569 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 Road725 m away | 172 m² | 209 m² | +37 m² +22% | 2022 |
|---|
| 16, Neville Street779 m away | 43 m² | 80 m² | +37 m² +86% | 2009 |
|---|
| 31, Daisy Street863 m away | 66 m² | 102 m² | +36 m² +55% | 2024 |
|---|
| 39, Market Road203 m away | 94 m² | 130 m² | +36 m² +38% | 2022 |
|---|
| 29, Rennie Street728 m away | 93 m² | 129 m² | +36 m² +39% | 2016 |
|---|
| 75, Romilly Crescent242 m away | 150 m² | 186 m² | +36 m² +24% | 2014 |
|---|
| 201, Cathedral Road542 m away | 61 m² | 97 m² | +36 m² +59% | 2014 |
|---|
| 1, Tintern Street573 m away | 66 m² | 102 m² | +36 m² +55% | 2012 |
|---|
| Flat 2, 38, Glamorgan Street273 m away | 43 m² | 79 m² | +36 m² +84% | 2010 |
|---|
| 112, Pembroke Road544 m away | 89 m² | 124 m² | +35 m² +39% | 2024 |
|---|
| 136b, Llandaff Road449 m away | 104 m² | 139 m² | +35 m² +34% | 2019 |
|---|
| 190, Cathedral Road604 m away | 53 m² | 88 m² | +35 m² +66% | 2010 |
|---|
| 13, Fairleigh Road807 m away | 118 m² | 152 m² | +34 m² +29% | 2025 |
|---|
| 63, Clive Road761 m away | 34 m² | 68 m² | +34 m² +100% | 2022 |
|---|
| 37, Severn Grove381 m away | 48 m² | 82 m² | +34 m² +71% | 2021 |
|---|
| 29, Plasturton Gardens384 m away | 141 m² | 175 m² | +34 m² +24% | 2021 |
|---|
| 27, Neville Street821 m away | 193 m² | 227 m² | +34 m² +18% | 2021 |
|---|
| 123, Clive Road817 m away | 113 m² | 147 m² | +34 m² +30% | 2013 |
|---|
| 67, Plasturton Avenue394 m away | 171 m² | 204 m² | +33 m² +19% | 2023 |
|---|
| 51, Canton Court474 m away | 50 m² | 83 m² | +33 m² +66% | 2023 |
|---|
| 1, Leckwith Close874 m away | 63 m² | 96 m² | +33 m² +52% | 2022 |
|---|
| 97, Kings Road325 m away | 149 m² | 182 m² | +33 m² +22% | 2021 |
|---|
| 1a, Teilo Street676 m away | 144 m² | 177 m² | +33 m² +23% | 2020 |
|---|
| 105, Cowbridge Road East769 m away | 96 m² | 129 m² | +33 m² +34% | 2019 |
|---|
| 324, Cowbridge Road East714 m away | 37 m² | 70 m² | +33 m² +89% | 2018 |
|---|
| 68, Cathedral Road617 m away | 42 m² | 75 m² | +33 m² +79% | 2016 |
|---|
| Flat 28, Edinburgh Court, Wyndham Place648 m away | 34 m² | 67 m² | +33 m² +97% | 2013 |
|---|
| 29, Rectory Road265 m away | 46 m² | 79 m² | +33 m² +72% | 2012 |
|---|
| 108, Wyndham Road215 m away | 93 m² | 126 m² | +33 m² +35% | 2011 |
|---|
| 98, Clive Road870 m away | 140 m² | 173 m² | +33 m² +24% | 2010 |
|---|
| 6, Hamilton Street576 m away | 134 m² | 167 m² | +33 m² +25% | 2009 |
|---|
| 290, Cowbridge Road East609 m away | 46 m² | 79 m² | +33 m² +72% | 2009 |
|---|
| 292, Cowbridge Road East609 m away | 46 m² | 79 m² | +33 m² +72% | 2009 |
|---|
| 12, Preswylfa Street713 m away | 93 m² | 125 m² | +32 m² +34% | 2026 |
|---|
| 215, Lansdowne Road853 m away | 59 m² | 91 m² | +32 m² +54% | 2026 |
|---|
| Flat 1, Kings Mews, Kings Road449 m away | 35 m² | 67 m² | +32 m² +91% | 2025 |
|---|
| 29, Wembley Road625 m away | 92 m² | 124 m² | +32 m² +35% | 2025 |
|---|
| Flat 4, 86, Cathedral Road561 m away | 55 m² | 87 m² | +32 m² +58% | 2021 |
|---|
| 10, Vishwell Road933 m away | 97 m² | 129 m² | +32 m² +33% | 2021 |
|---|
| 119, Cathedral Road495 m away | 53 m² | 85 m² | +32 m² +60% | 2020 |
|---|
| 30, Wells Street642 m away | 84 m² | 116 m² | +32 m² +38% | 2014 |
|---|
| 26, De Burgh Street866 m away | 123 m² | 155 m² | +32 m² +26% | 2009 |
|---|
| 35, Pen Y Peel Road377 m away | 82 m² | 113 m² | +31 m² +38% | 2023 |
|---|
| 12, Hamilton Street576 m away | 141 m² | 172 m² | +31 m² +22% | 2022 |
|---|
| 22, Canton Court441 m away | 94 m² | 125 m² | +31 m² +33% | 2014 |
|---|
| 92, Wyndham Crescent241 m away | 57 m² | 88 m² | +31 m² +54% | 2013 |
|---|
| 29, Pontcanna Street379 m away | 122 m² | 152 m² | +30 m² +25% | 2020 |
|---|
| 1, Penhill Road618 m away | 58 m² | 88 m² | +30 m² +52% | 2019 |
|---|
| 106, Clive Road870 m away | 129 m² | 159 m² | +30 m² +23% | 2019 |
|---|
| 41, Kings Road355 m away | 61 m² | 91 m² | +30 m² +49% | 2017 |
|---|
| 31, Hamilton Street576 m away | 130 m² | 160 m² | +30 m² +23% | 2017 |
|---|
| 26, Romilly Road706 m away | 57 m² | 87 m² | +30 m² +53% | 2010 |
|---|
| 9, Wyndham Road258 m away | 91 m² | 120 m² | +29 m² +32% | 2025 |
|---|
| 11, Wyndham Place610 m away | 84 m² | 113 m² | +29 m² +35% | 2022 |
|---|
| 3, Egham Street661 m away | 99 m² | 128 m² | +29 m² +29% | 2022 |
|---|
| 71, Daisy Street968 m away | 58 m² | 87 m² | +29 m² +50% | 2021 |
|---|
| 36, Wyndham Road258 m away | 78 m² | 107 m² | +29 m² +37% | 2020 |
|---|
| 24, Llanfair Road393 m away | 106 m² | 135 m² | +29 m² +27% | 2016 |
|---|
| 47, Pontcanna Street477 m away | 124 m² | 153 m² | +29 m² +23% | 2015 |
|---|
| Regina Villa, Regina Terrace875 m away | 143 m² | 172 m² | +29 m² +20% | 2014 |
|---|
| 13, Daisy Street863 m away | 70 m² | 99 m² | +29 m² +41% | 2011 |
|---|
| 28, Major Road444 m away | 108 m² | 136 m² | +28 m² +26% | 2026 |
|---|
| 16, Lansdowne Road557 m away | 130 m² | 158 m² | +28 m² +22% | 2026 |
|---|
| 11, Hamilton Street576 m away | 136 m² | 164 m² | +28 m² +21% | 2021 |
|---|
| 7, Beda Road432 m away | 94 m² | 122 m² | +28 m² +30% | 2020 |
|---|
| 19, Bartley Wilson Way941 m away | 110 m² | 138 m² | +28 m² +25% | 2020 |
|---|
| 95c, Severn Grove465 m away | 28 m² | 56 m² | +28 m² +100% | 2011 |
|---|
| 18, Glamorgan Street273 m away | 79 m² | 106 m² | +27 m² +34% | 2025 |
|---|
| 16, Romilly Crescent211 m away | 69 m² | 96 m² | +27 m² +39% | 2024 |
|---|
| 38, Lower Cathedral Road943 m away | 54 m² | 81 m² | +27 m² +50% | 2010 |
|---|
| 36, Beda Road532 m away | 54 m² | 81 m² | +27 m² +50% | 2009 |
|---|
| 11, Cumberland Street440 m away | 97 m² | 123 m² | +26 m² +27% | 2021 |
|---|
| 90, Wyndham Crescent241 m away | 63 m² | 89 m² | +26 m² +41% | 2020 |
|---|
| 28, Alexandra Road318 m away | 88 m² | 114 m² | +26 m² +30% | 2017 |
|---|
| 64, Theobald Road539 m away | 91 m² | 117 m² | +26 m² +29% | 2016 |
|---|
| 3, Fields Park Road725 m away | 153 m² | 179 m² | +26 m² +17% | 2011 |
|---|
| 21, Kingsland Road993 m away | 27 m² | 53 m² | +26 m² +96% | 2010 |
|---|
| 11, Bloom Street529 m away | 76 m² | 101 m² | +25 m² +33% | 2025 |
|---|
| 18, Carmarthen Street200 m away | 80 m² | 105 m² | +25 m² +31% | 2024 |
|---|
| 7, Mortimer Road545 m away | 87 m² | 112 m² | +25 m² +29% | 2024 |
|---|
| 62, Kings Road352 m away | 128 m² | 153 m² | +25 m² +20% | 2023 |
|---|
| 52, Beda Road532 m away | 109 m² | 134 m² | +25 m² +23% | 2023 |
|---|
| 16, Telford Street887 m away | 89 m² | 114 m² | +25 m² +28% | 2022 |
|---|
| 14, Cumberland Street440 m away | 62 m² | 87 m² | +25 m² +40% | 2019 |
|---|
| 6, Library Street141 m away | 129 m² | 154 m² | +25 m² +19% | 2018 |
|---|
| 59, Romilly Crescent242 m away | 70 m² | 95 m² | +25 m² +36% | 2018 |
|---|
| 128, Severn Grove465 m away | 49 m² | 74 m² | +25 m² +51% | 2013 |
|---|
| 30, Brecon Street522 m away | 100 m² | 125 m² | +25 m² +25% | 2013 |
|---|
| 73, Kings Road325 m away | 63 m² | 88 m² | +25 m² +40% | 2011 |
|---|
| 2, Church Road270 m away | 129 m² | 153 m² | +24 m² +19% | 2026 |
|---|
| 33b, Fields Park Road725 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 Place895 m away | 123 m² | 147 m² | +24 m² +20% | 2023 |
|---|
| 4, Rawden Place895 m away | 119 m² | 143 m² | +24 m² +20% | 2023 |
|---|
| 49, Bartley Wilson Way941 m away | 59 m² | 83 m² | +24 m² +41% | 2022 |
|---|
| 4, Cardigan Court335 m away | 46 m² | 70 m² | +24 m² +52% | 2021 |
|---|
| 22, Nesta Road930 m away | 102 m² | 126 m² | +24 m² +24% | 2020 |
|---|
| 51, Plasturton Avenue366 m away | 153 m² | 177 m² | +24 m² +16% | 2017 |
|---|
| 21, Penhill Road613 m away | 62 m² | 86 m² | +24 m² +39% | 2016 |
|---|
| 5, Mortimer Road545 m away | 102 m² | 126 m² | +24 m² +24% | 2011 |
|---|
| 3, Bloom Street529 m away | 71 m² | 94 m² | +23 m² +32% | 2026 |
|---|
| 73, Wells Street742 m away | 90 m² | 113 m² | +23 m² +26% | 2025 |
|---|
| 23, Victoria Avenue976 m away | 89 m² | 112 m² | +23 m² +26% | 2021 |
|---|
| 4, Leckwith Mews660 m away | 141 m² | 163 m² | +22 m² +16% | 2026 |
|---|
| Flat 1, Conway Court, 18, Penhill Road613 m away | 117 m² | 139 m² | +22 m² +19% | 2025 |
|---|
| 11, Leckwith Place626 m away | 94 m² | 116 m² | +22 m² +23% | 2022 |
|---|
| 33, West Lee782 m away | 58 m² | 80 m² | +22 m² +38% | 2021 |
|---|
| 75, Daisy Street968 m away | 69 m² | 91 m² | +22 m² +32% | 2020 |
|---|
| 34, Wyndham Crescent345 m away | 101 m² | 123 m² | +22 m² +22% | 2016 |
|---|
| 16, Conway Road354 m away | 59 m² | 81 m² | +22 m² +37% | 2014 |
|---|
| 1, Egerton Mews582 m away | 87 m² | 109 m² | +22 m² +25% | 2012 |
|---|
| 67, Romilly Crescent242 m away | 16 m² | 38 m² | +22 m² +138% | 2010 |
|---|
| 139, Cathedral Road492 m away | 24 m² | 46 m² | +22 m² +92% | 2009 |
|---|
| 119, Romilly Road706 m away | 15 m² | 37 m² | +22 m² +147% | 2009 |
|---|
| 2, Fairleigh Road807 m away | 107 m² | 128 m² | +21 m² +20% | 2025 |
|---|
| 18, Vishwell Road933 m away | 101 m² | 122 m² | +21 m² +21% | 2024 |
|---|
| 70, Hamilton Street478 m away | 124 m² | 145 m² | +21 m² +17% | 2023 |
|---|
| 10, Wyndham Place610 m away | 92 m² | 113 m² | +21 m² +23% | 2022 |
|---|
| 489, Cowbridge Road East895 m away | 106 m² | 127 m² | +21 m² +20% | 2022 |
|---|
| 37, Talbot Street512 m away | 136 m² | 157 m² | +21 m² +15% | 2021 |
|---|
| 14, Grosvenor Street682 m away | 46 m² | 67 m² | +21 m² +46% | 2021 |
|---|
| Flat 9, Caernarvon Court, Conway Road474 m away | 44 m² | 65 m² | +21 m² +48% | 2020 |
|---|
| Coach House, 122a, Pembroke Road544 m away | 78 m² | 99 m² | +21 m² +27% | 2019 |
|---|
| 95, Cathedral Road514 m away | 51 m² | 72 m² | +21 m² +41% | 2015 |
|---|
| 6, Ryder Street679 m away | 129 m² | 150 m² | +21 m² +16% | 2015 |
|---|
| 32, Rectory Road265 m away | 102 m² | 123 m² | +21 m² +21% | 2014 |
|---|
| 11, Eton Place367 m away | 111 m² | 132 m² | +21 m² +19% | 2014 |
|---|
| 50, Alexandra Road450 m away | 74 m² | 94 m² | +20 m² +27% | 2026 |
|---|
| 13, Anglesey Street400 m away | 88 m² | 108 m² | +20 m² +23% | 2025 |
|---|
| Apartment 13, Cathedral House, Hamilton Street702 m away | 96 m² | 116 m² | +20 m² +21% | 2025 |
|---|
| Flat 3, 362, Cowbridge Road East793 m away | 40 m² | 60 m² | +20 m² +50% | 2025 |
|---|
| 28, Brecon Street522 m away | 91 m² | 111 m² | +20 m² +22% | 2023 |
|---|
| 74, Llanfair Road529 m away | 112 m² | 132 m² | +20 m² +18% | 2022 |
|---|
| 11, Maldwyn Street679 m away | 120 m² | 140 m² | +20 m² +17% | 2021 |
|---|
| 32, Carmarthen Street244 m away | 76 m² | 96 m² | +20 m² +26% | 2020 |
|---|
| 6, Glamorgan Street Mews302 m away | 54 m² | 74 m² | +20 m² +37% | 2019 |
|---|
| 10, Earle Place337 m away | 113 m² | 133 m² | +20 m² +18% | 2014 |
|---|
| 6, St Johns Crescent343 m away | 35 m² | 55 m² | +20 m² +57% | 2013 |
|---|
| 195, Cathedral Road542 m away | 48 m² | 68 m² | +20 m² +42% | 2009 |
|---|
| 15b, Clive Road681 m away | 63 m² | 82 m² | +19 m² +30% | 2026 |
|---|
| 15, Grosvenor Street682 m away | 110 m² | 129 m² | +19 m² +17% | 2026 |
|---|
| 362, Cowbridge Road East793 m away | 45 m² | 64 m² | +19 m² +42% | 2025 |
|---|