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 9PQ
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 Road352 m away | 166 m² | 342 m² | +176 m² +106% | 2016 |
| 93, Cathedral Road673 m away | 116 m² | 280 m² | +164 m² +141% | 2023 |
| 29, Romilly Road West803 m away | 125 m² | 278 m² | +153 m² +122% | 2016 |
| 2a, William Street90 m away | 72 m² | 179 m² | +107 m² +149% | 2022 |
| 23, Pontcanna Place56 m away | 78 m² | 175 m² | +97 m² +124% | 2025 |
| 47, Talbot Street874 m away | 155 m² | 239 m² | +84 m² +54% | 2018 |
| 21, Brunswick Street880 m away | 97 m² | 181 m² | +84 m² +87% | 2014 |
| 5, Dyfrig Street517 m away | 64 m² | 134 m² | +70 m² +109% | 2008 |
| 12, Kyveilog Street445 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.
| 76 m² |
| 142 m² |
| +66 m² +87% |
| 2019 |
| 122, Severn Grove165 m away | 128 m² | 193 m² | +65 m² +51% | 2015 |
|---|
| 23, Teilo Street251 m away | 82 m² | 147 m² | +65 m² +79% | 2015 |
|---|
| Cwrt Soffia, 47 - 53, Cathedral Road820 m away | 66 m² | 128 m² | +62 m² +94% | 2008 |
|---|
| 78, Plasturton Avenue331 m away | 74 m² | 135 m² | +61 m² +82% | 2024 |
|---|
| 12, Westbury Terrace846 m away | 51 m² | 110 m² | +59 m² +116% | 2025 |
|---|
| 6, Chargot Road994 m away | 169 m² | 228 m² | +59 m² +35% | 2024 |
|---|
| 14, St Johns Crescent951 m away | 121 m² | 178 m² | +57 m² +47% | 2012 |
|---|
| 23, York Street994 m away | 74 m² | 128 m² | +54 m² +73% | 2024 |
|---|
| 3, Carmarthen Street594 m away | 79 m² | 132 m² | +53 m² +67% | 2014 |
|---|
| 33, Penhill Road146 m away | 84 m² | 137 m² | +53 m² +63% | 2009 |
|---|
| 127, Llandaff Road444 m away | 122 m² | 172 m² | +50 m² +41% | 2024 |
|---|
| 23, Cae Syr Dafydd366 m away | 70 m² | 120 m² | +50 m² +71% | 2014 |
|---|
| 60, Cathedral Road779 m away | 43 m² | 93 m² | +50 m² +116% | 2013 |
|---|
| 7, Ryder Street806 m away | 160 m² | 208 m² | +48 m² +30% | 2023 |
|---|
| 1, Berthwin Street405 m away | 61 m² | 109 m² | +48 m² +79% | 2021 |
|---|
| 19, Gileston Road194 m away | 125 m² | 173 m² | +48 m² +38% | 2019 |
|---|
| 33, Teilo Street251 m away | 156 m² | 202 m² | +46 m² +29% | 2026 |
|---|
| 13, Forrest Road948 m away | 123 m² | 167 m² | +44 m² +36% | 2020 |
|---|
| 33, Ovington Terrace803 m away | 143 m² | 187 m² | +44 m² +31% | 2019 |
|---|
| 481, Cowbridge Road East998 m away | 55 m² | 99 m² | +44 m² +80% | 2012 |
|---|
| Flat 4, 78, Cathedral Road659 m away | 75 m² | 118 m² | +43 m² +57% | 2023 |
|---|
| 18, Egerton Street740 m away | 75 m² | 118 m² | +43 m² +57% | 2020 |
|---|
| 76, Wyndham Crescent699 m away | 182 m² | 225 m² | +43 m² +24% | 2016 |
|---|
| 42, Plasturton Gardens646 m away | 212 m² | 254 m² | +42 m² +20% | 2025 |
|---|
| 76, Cathedral Road659 m away | 41 m² | 83 m² | +42 m² +102% | 2022 |
|---|
| 133, Clive Road681 m away | 47 m² | 88 m² | +41 m² +87% | 2021 |
|---|
| 28, Palace Road926 m away | 233 m² | 274 m² | +41 m² +18% | 2020 |
|---|
| 5, Egerton Street766 m away | 101 m² | 142 m² | +41 m² +41% | 2011 |
|---|
| 47, Conybeare Road804 m away | 122 m² | 162 m² | +40 m² +33% | 2021 |
|---|
| 21, Wyndham Road682 m away | 91 m² | 130 m² | +39 m² +43% | 2026 |
|---|
| 100, Severn Grove165 m away | 141 m² | 180 m² | +39 m² +28% | 2025 |
|---|
| The Croft, Llandaff Road272 m away | 220 m² | 259 m² | +39 m² +18% | 2021 |
|---|
| 67, Fairleigh Road196 m away | 95 m² | 132 m² | +37 m² +39% | 2023 |
|---|
| 15, Fields Park Road113 m away | 172 m² | 209 m² | +37 m² +22% | 2022 |
|---|
| 31, Daisy Street846 m away | 66 m² | 102 m² | +36 m² +55% | 2024 |
|---|
| 39, Market Road643 m away | 94 m² | 130 m² | +36 m² +38% | 2022 |
|---|
| 25, Halsbury Road897 m away | 93 m² | 129 m² | +36 m² +39% | 2015 |
|---|
| 201, Cathedral Road266 m away | 61 m² | 97 m² | +36 m² +59% | 2014 |
|---|
| 75, Romilly Crescent395 m away | 150 m² | 186 m² | +36 m² +24% | 2014 |
|---|
| 1, Tintern Street908 m away | 66 m² | 102 m² | +36 m² +55% | 2012 |
|---|
| Flat 2, 38, Glamorgan Street685 m away | 43 m² | 79 m² | +36 m² +84% | 2010 |
|---|
| 112, Pembroke Road654 m away | 89 m² | 124 m² | +35 m² +39% | 2024 |
|---|
| 15, Greenwich Road916 m away | 82 m² | 117 m² | +35 m² +43% | 2022 |
|---|
| 23, Chargot Road994 m away | 179 m² | 214 m² | +35 m² +20% | 2022 |
|---|
| 136b, Llandaff Road312 m away | 104 m² | 139 m² | +35 m² +34% | 2019 |
|---|
| 190, Cathedral Road258 m away | 53 m² | 88 m² | +35 m² +66% | 2010 |
|---|
| 13, Fairleigh Road191 m away | 118 m² | 152 m² | +34 m² +29% | 2025 |
|---|
| 63, Clive Road776 m away | 34 m² | 68 m² | +34 m² +100% | 2022 |
|---|
| 37, Severn Grove270 m away | 48 m² | 82 m² | +34 m² +71% | 2021 |
|---|
| 29, Plasturton Gardens651 m away | 141 m² | 175 m² | +34 m² +24% | 2021 |
|---|
| 123, Clive Road727 m away | 113 m² | 147 m² | +34 m² +30% | 2013 |
|---|
| 16, Westbury Terrace846 m away | 72 m² | 105 m² | +33 m² +46% | 2026 |
|---|
| 67, Plasturton Avenue351 m away | 171 m² | 204 m² | +33 m² +19% | 2023 |
|---|
| 97, Kings Road703 m away | 149 m² | 182 m² | +33 m² +22% | 2021 |
|---|
| 1a, Teilo Street251 m away | 144 m² | 177 m² | +33 m² +23% | 2020 |
|---|
| 324, Cowbridge Road East925 m away | 37 m² | 70 m² | +33 m² +89% | 2018 |
|---|
| 68, Cathedral Road779 m away | 42 m² | 75 m² | +33 m² +79% | 2016 |
|---|
| 29, Rectory Road484 m away | 46 m² | 79 m² | +33 m² +72% | 2012 |
|---|
| 108, Wyndham Road572 m away | 93 m² | 126 m² | +33 m² +35% | 2011 |
|---|
| 98, Clive Road681 m away | 140 m² | 173 m² | +33 m² +24% | 2010 |
|---|
| 290, Cowbridge Road East859 m away | 46 m² | 79 m² | +33 m² +72% | 2009 |
|---|
| 292, Cowbridge Road East859 m away | 46 m² | 79 m² | +33 m² +72% | 2009 |
|---|
| 6, Hamilton Street943 m away | 134 m² | 167 m² | +33 m² +25% | 2009 |
|---|
| 12, Preswylfa Street641 m away | 93 m² | 125 m² | +32 m² +34% | 2026 |
|---|
| Flat 1, Kings Mews, Kings Road931 m away | 35 m² | 67 m² | +32 m² +91% | 2025 |
|---|
| Flat 4, 86, Cathedral Road659 m away | 55 m² | 87 m² | +32 m² +58% | 2021 |
|---|
| 10, Vishwell Road731 m away | 97 m² | 129 m² | +32 m² +33% | 2021 |
|---|
| 119, Cathedral Road561 m away | 53 m² | 85 m² | +32 m² +60% | 2020 |
|---|
| 35, Pen Y Peel Road670 m away | 82 m² | 113 m² | +31 m² +38% | 2023 |
|---|
| 12, Hamilton Street943 m away | 141 m² | 172 m² | +31 m² +22% | 2022 |
|---|
| 92, Wyndham Crescent699 m away | 57 m² | 88 m² | +31 m² +54% | 2013 |
|---|
| 29, Pontcanna Street323 m away | 122 m² | 152 m² | +30 m² +25% | 2020 |
|---|
| 1, Penhill Road0 m away | 58 m² | 88 m² | +30 m² +52% | 2019 |
|---|
| 106, Clive Road681 m away | 129 m² | 159 m² | +30 m² +23% | 2019 |
|---|
| 41, Kings Road822 m away | 61 m² | 91 m² | +30 m² +49% | 2017 |
|---|
| 31, Hamilton Street943 m away | 130 m² | 160 m² | +30 m² +23% | 2017 |
|---|
| 26, Romilly Road688 m away | 57 m² | 87 m² | +30 m² +53% | 2010 |
|---|
| 9, Wyndham Road682 m away | 91 m² | 120 m² | +29 m² +32% | 2025 |
|---|
| 3, Egham Street637 m away | 99 m² | 128 m² | +29 m² +29% | 2022 |
|---|
| 71, Daisy Street959 m away | 58 m² | 87 m² | +29 m² +50% | 2021 |
|---|
| 36, Wyndham Road682 m away | 78 m² | 107 m² | +29 m² +37% | 2020 |
|---|
| 24, Llanfair Road257 m away | 106 m² | 135 m² | +29 m² +27% | 2016 |
|---|
| 47, Pontcanna Street244 m away | 124 m² | 153 m² | +29 m² +23% | 2015 |
|---|
| Regina Villa, Regina Terrace720 m away | 143 m² | 172 m² | +29 m² +20% | 2014 |
|---|
| 13, Daisy Street846 m away | 70 m² | 99 m² | +29 m² +41% | 2011 |
|---|
| 11, Hamilton Street943 m away | 136 m² | 164 m² | +28 m² +21% | 2021 |
|---|
| 7, Beda Road862 m away | 94 m² | 122 m² | +28 m² +30% | 2020 |
|---|
| 95c, Severn Grove165 m away | 28 m² | 56 m² | +28 m² +100% | 2011 |
|---|
| 18, Glamorgan Street685 m away | 79 m² | 106 m² | +27 m² +34% | 2025 |
|---|
| 16, Romilly Crescent409 m away | 69 m² | 96 m² | +27 m² +39% | 2024 |
|---|
| 11, Cumberland Street993 m away | 97 m² | 123 m² | +26 m² +27% | 2021 |
|---|
| 90, Wyndham Crescent699 m away | 63 m² | 89 m² | +26 m² +41% | 2020 |
|---|
| 28, Alexandra Road901 m away | 88 m² | 114 m² | +26 m² +30% | 2017 |
|---|
| 3, Fields Park Road113 m away | 153 m² | 179 m² | +26 m² +17% | 2011 |
|---|
| 11, Bloom Street231 m away | 76 m² | 101 m² | +25 m² +33% | 2025 |
|---|
| 7, Mortimer Road145 m away | 87 m² | 112 m² | +25 m² +29% | 2024 |
|---|
| 18, Carmarthen Street530 m away | 80 m² | 105 m² | +25 m² +31% | 2024 |
|---|
| 62, Kings Road705 m away | 128 m² | 153 m² | +25 m² +20% | 2023 |
|---|
| 14, Cumberland Street993 m away | 62 m² | 87 m² | +25 m² +40% | 2019 |
|---|
| 59, Romilly Crescent395 m away | 70 m² | 95 m² | +25 m² +36% | 2018 |
|---|
| 6, Library Street724 m away | 129 m² | 154 m² | +25 m² +19% | 2018 |
|---|
| 84, Pencisely Road979 m away | 68 m² | 93 m² | +25 m² +37% | 2018 |
|---|
| 128, Severn Grove165 m away | 49 m² | 74 m² | +25 m² +51% | 2013 |
|---|
| 30, Brecon Street723 m away | 100 m² | 125 m² | +25 m² +25% | 2013 |
|---|
| 73, Kings Road703 m away | 63 m² | 88 m² | +25 m² +40% | 2011 |
|---|
| 2, Church Road885 m away | 129 m² | 153 m² | +24 m² +19% | 2026 |
|---|
| 33b, Fields Park Road113 m away | 52 m² | 76 m² | +24 m² +46% | 2025 |
|---|
| 99, Fairleigh Road196 m away | 83 m² | 107 m² | +24 m² +29% | 2024 |
|---|
| 4, Cardigan Court610 m away | 46 m² | 70 m² | +24 m² +52% | 2021 |
|---|
| 51, Plasturton Avenue494 m away | 153 m² | 177 m² | +24 m² +16% | 2017 |
|---|
| 21, Penhill Road146 m away | 62 m² | 86 m² | +24 m² +39% | 2016 |
|---|
| 5, Mortimer Road145 m away | 102 m² | 126 m² | +24 m² +24% | 2011 |
|---|
| 3, Bloom Street231 m away | 71 m² | 94 m² | +23 m² +32% | 2026 |
|---|
| 23, Victoria Avenue944 m away | 89 m² | 112 m² | +23 m² +26% | 2021 |
|---|
| 21, Greenwich Road916 m away | 149 m² | 172 m² | +23 m² +15% | 2013 |
|---|
| Flat 1, Conway Court, 18, Penhill Road146 m away | 117 m² | 139 m² | +22 m² +19% | 2025 |
|---|
| 75, Daisy Street959 m away | 69 m² | 91 m² | +22 m² +32% | 2020 |
|---|
| 34, Wyndham Crescent846 m away | 101 m² | 123 m² | +22 m² +22% | 2016 |
|---|
| 16, Conway Road264 m away | 59 m² | 81 m² | +22 m² +37% | 2014 |
|---|
| 1, Egerton Mews766 m away | 87 m² | 109 m² | +22 m² +25% | 2012 |
|---|
| 67, Romilly Crescent395 m away | 16 m² | 38 m² | +22 m² +138% | 2010 |
|---|
| 139, Cathedral Road454 m away | 24 m² | 46 m² | +22 m² +92% | 2009 |
|---|
| 119, Romilly Road688 m away | 15 m² | 37 m² | +22 m² +147% | 2009 |
|---|
| 2, Fairleigh Road191 m away | 107 m² | 128 m² | +21 m² +20% | 2025 |
|---|
| 18, Vishwell Road731 m away | 101 m² | 122 m² | +21 m² +21% | 2024 |
|---|
| 70, Hamilton Street925 m away | 124 m² | 145 m² | +21 m² +17% | 2023 |
|---|
| 37, Talbot Street874 m away | 136 m² | 157 m² | +21 m² +15% | 2021 |
|---|
| 14, Grosvenor Street963 m away | 46 m² | 67 m² | +21 m² +46% | 2021 |
|---|
| Flat 9, Caernarvon Court, Conway Road159 m away | 44 m² | 65 m² | +21 m² +48% | 2020 |
|---|
| Coach House, 122a, Pembroke Road654 m away | 78 m² | 99 m² | +21 m² +27% | 2019 |
|---|
| 95, Cathedral Road673 m away | 51 m² | 72 m² | +21 m² +41% | 2015 |
|---|
| 32, Rectory Road484 m away | 102 m² | 123 m² | +21 m² +21% | 2014 |
|---|
| 11, Eton Place958 m away | 111 m² | 132 m² | +21 m² +19% | 2014 |
|---|
| 13, Anglesey Street725 m away | 88 m² | 108 m² | +20 m² +23% | 2025 |
|---|
| Flat 3, 362, Cowbridge Road East978 m away | 40 m² | 60 m² | +20 m² +50% | 2025 |
|---|
| 28, Brecon Street723 m away | 91 m² | 111 m² | +20 m² +22% | 2023 |
|---|
| 74, Llanfair Road198 m away | 112 m² | 132 m² | +20 m² +18% | 2022 |
|---|
| 11, Maldwyn Street117 m away | 120 m² | 140 m² | +20 m² +17% | 2021 |
|---|
| 32, Carmarthen Street594 m away | 76 m² | 96 m² | +20 m² +26% | 2020 |
|---|
| 6, Glamorgan Street Mews718 m away | 54 m² | 74 m² | +20 m² +37% | 2019 |
|---|
| 10, Earle Place954 m away | 113 m² | 133 m² | +20 m² +18% | 2014 |
|---|
| 6, St Johns Crescent951 m away | 35 m² | 55 m² | +20 m² +57% | 2013 |
|---|
| 195, Cathedral Road266 m away | 48 m² | 68 m² | +20 m² +42% | 2009 |
|---|
| 15b, Clive Road862 m away | 63 m² | 82 m² | +19 m² +30% | 2026 |
|---|
| 15, Grosvenor Street963 m away | 110 m² | 129 m² | +19 m² +17% | 2026 |
|---|
| 362, Cowbridge Road East978 m away | 45 m² | 64 m² | +19 m² +42% | 2025 |
|---|
| 40, Severn Grove443 m away | 97 m² | 116 m² | +19 m² +20% | 2021 |
|---|
| 11, Turberville Place540 m away | 120 m² | 139 m² | +19 m² +16% | 2019 |
|---|
| 43, Radnor Road685 m away | 79 m² | 98 m² | +19 m² +24% | 2019 |
|---|
| Flat 4, 95, Cathedral Road673 m away | 30 m² | 49 m² | +19 m² +63% | 2018 |
|---|
| 138a, Llandaff Road312 m away | 101 m² | 120 m² | +19 m² +19% | 2014 |
|---|
| 36, Severn Grove443 m away | 92 m² | 111 m² | +19 m² +21% | 2011 |
|---|
| 24, Burlington Terrace684 m away | 104 m² | 122 m² | +18 m² +17% | 2026 |
|---|
| 12 Gwynt Mews, 30, Cathedral Road948 m away | 52 m² | 70 m² | +18 m² +35% | 2026 |
|---|
| 5, Egham Street637 m away | 102 m² | 120 m² | +18 m² +18% | 2024 |
|---|
| 35, Egerton Street766 m away | 109 m² | 127 m² | +18 m² +17% | 2024 |
|---|
| 186, Llandaff Road272 m away | 41 m² | 59 m² | +18 m² +44% | 2022 |
|---|
| 27, Radnor Road685 m away | 97 m² | 115 m² | +18 m² +19% | 2022 |
|---|
| 1, Bloom Street231 m away | 73 m² | 91 m² | +18 m² +25% | 2021 |
|---|
| 28, Brunswick Street880 m away | 93 m² | 111 m² | +18 m² +19% | 2021 |
|---|
| 113, Kings Road703 m away | 61 m² | 79 m² | +18 m² +30% | 2017 |
|---|
| 137, Clive Road681 m away | 66 m² | 84 m² | +18 m² +27% | 2015 |
|---|
| The Town House, 5, Romilly Road464 m away | 58 m² | 76 m² | +18 m² +31% | 2014 |
|---|
| 138, Cathedral Road397 m away | 60 m² | 78 m² | +18 m² +30% | 2010 |
|---|
| 154, Cathedral Road325 m away | 50 m² | 68 m² | +18 m² +36% | 2009 |
|---|
| 14, Romilly Road688 m away | 30 m² | 48 m² | +18 m² +60% | 2009 |
|---|
| 41, Loftus Street871 m away | 72 m² | 89 m² | +17 m² +24% | 2026 |
|---|
| 3, Dogo Street315 m away | 74 m² | 91 m² | +17 m² +23% | 2025 |
|---|
| 76, Wyndham Road572 m away | 90 m² | 107 m² | +17 m² +19% | 2025 |
|---|
| 4, Mortimer Road145 m away | 92 m² | 109 m² | +17 m² +18% | 2024 |
|---|
| 13, Severn Grove443 m away | 77 m² | 94 m² | +17 m² +22% | 2024 |
|---|
| 26, Daisy Street846 m away | 73 m² | 90 m² | +17 m² +23% | 2023 |
|---|
| 79, Hamilton Street925 m away | 71 m² | 88 m² | +17 m² +24% | 2017 |
|---|
| 63, Cathedral Road767 m away | 34 m² | 51 m² | +17 m² +50% | 2015 |
|---|
| 6, Victoria Avenue944 m away | 82 m² | 98 m² | +16 m² +20% | 2026 |
|---|
| 5, Parry Street540 m away | 56 m² | 72 m² | +16 m² +29% | 2022 |
|---|
| 2, Meadow Street251 m away | 73 m² | 89 m² | +16 m² +22% | 2021 |
|---|
| 72, Wyndham Road572 m away | 105 m² | 121 m² | +16 m² +15% | 2020 |
|---|
| 74, Pen Y Peel Road670 m away | 84 m² | 100 m² | +16 m² +19% | 2020 |
|---|
| 32, Penllyn Road881 m away | 101 m² | 117 m² | +16 m² +16% | 2020 |
|---|
| 18, St Johns Crescent951 m away | 54 m² | 70 m² | +16 m² +30% | 2019 |
|---|
| 89, Cathedral Road673 m away | 42 m² | 58 m² | +16 m² +38% | 2016 |
|---|
| Flat 2, 86, Cathedral Road659 m away | 64 m² | 80 m² | +16 m² +25% | 2010 |
|---|
| 185, Cathedral Road266 m away | 49 m² | 65 m² | +16 m² +33% | 2008 |
|---|
| 40, Glynne Street578 m away | 72 m² | 88 m² | +16 m² +22% | 2008 |
|---|
| 6, Cae Syr Dafydd366 m away | 78 m² | 93 m² | +15 m² +19% | 2026 |
|---|
| 45, Severn Road738 m away | 93 m² | 108 m² | +15 m² +16% | 2026 |
|---|
| 128, Pembroke Road762 m away | 88 m² | 103 m² | +15 m² +17% | 2026 |
|---|
| 34, Severn Grove443 m away | 96 m² | 111 m² | +15 m² +16% | 2025 |
|---|
| 23, Springfield Place618 m away | 84 m² | 99 m² | +15 m² +18% | 2024 |
|---|
| Flat 2, Summerau Court, Pencisely Road414 m away | 71 m² | 86 m² | +15 m² +21% | 2023 |
|---|