Finding extended homes…
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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 9PL
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 Road0 m away | 166 m² | 342 m² | +176 m² +106% | 2016 |
| 93, Cathedral Road330 m away | 116 m² | 280 m² | +164 m² +141% | 2023 |
| 2a, William Street263 m away | 72 m² | 179 m² | +107 m² +149% | 2022 |
| 23, Pontcanna Place300 m away | 78 m² | 175 m² | +97 m² +124% | 2025 |
| 47, Talbot Street558 m away | 155 m² | 239 m² | +84 m² +54% | 2018 |
| 21, Brunswick Street851 m away | 97 m² | 181 m² | +84 m² +87% | 2014 |
| 174, Colum Road910 m away | 78 m² | 160 m² | +82 m² +105% | 2016 |
| 17, Queen Anne Square953 m away | 148 m² | 224 m² | +76 m² +51% | 2015 |
| 5, Dyfrig Street172 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 |
| 12, Kyveilog Street120 m away | 76 m² | 142 m² | +66 m² +87% | 2019 |
|---|
| 23, Teilo Street213 m away | 82 m² | 147 m² | +65 m² +79% | 2015 |
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| 122, Severn Grove240 m away | 128 m² | 193 m² | +65 m² +51% | 2015 |
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| 78, Plasturton Avenue61 m away | 74 m² | 135 m² | +61 m² +82% | 2024 |
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| 24, Wells Street987 m away | 178 m² | 236 m² | +58 m² +33% | 2020 |
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| 25a, Neville Street957 m away | 139 m² | 197 m² | +58 m² +42% | 2014 |
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| 19, Queen Anne Square953 m away | 149 m² | 206 m² | +57 m² +38% | 2022 |
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| 14, St Johns Crescent841 m away | 121 m² | 178 m² | +57 m² +47% | 2012 |
|---|
| 3, Carmarthen Street627 m away | 79 m² | 132 m² | +53 m² +67% | 2014 |
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| 127, Llandaff Road498 m away | 122 m² | 172 m² | +50 m² +41% | 2024 |
|---|
| 23, Cae Syr Dafydd599 m away | 70 m² | 120 m² | +50 m² +71% | 2014 |
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| 60, Cathedral Road430 m away | 43 m² | 93 m² | +50 m² +116% | 2013 |
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| 54, Neville Street937 m away | 79 m² | 129 m² | +50 m² +63% | 2008 |
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| 7, Ryder Street481 m away | 160 m² | 208 m² | +48 m² +30% | 2023 |
|---|
| 1, Berthwin Street106 m away | 61 m² | 109 m² | +48 m² +79% | 2021 |
|---|
| 19, Gileston Road247 m away | 125 m² | 173 m² | +48 m² +38% | 2019 |
|---|
| Cwrt Soffia, 47 - 53, Cathedral Road477 m away | 81 m² | 128 m² | +47 m² +58% | 2008 |
|---|
| 33, Teilo Street213 m away | 156 m² | 202 m² | +46 m² +29% | 2026 |
|---|
| Flat 4, 78, Cathedral Road309 m away | 75 m² | 118 m² | +43 m² +57% | 2023 |
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| 14, North Road880 m away | 67 m² | 110 m² | +43 m² +64% | 2022 |
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| 18, Egerton Street887 m away | 75 m² | 118 m² | +43 m² +57% | 2020 |
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| 76, Wyndham Crescent460 m away | 182 m² | 225 m² | +43 m² +24% | 2016 |
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| 42, Plasturton Gardens314 m away | 212 m² | 254 m² | +42 m² +20% | 2025 |
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| Apartment 8, The Hamilton'S, Cathedral Road692 m away | 67 m² | 108 m² | +41 m² +61% | 2023 |
|---|
| 133, Clive Road975 m away | 47 m² | 88 m² | +41 m² +87% | 2021 |
|---|
| 5, Egerton Street915 m away | 101 m² | 142 m² | +41 m² +41% | 2011 |
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| 21, Wyndham Road433 m away | 91 m² | 130 m² | +39 m² +43% | 2026 |
|---|
| 100, Severn Grove240 m away | 141 m² | 180 m² | +39 m² +28% | 2025 |
|---|
| The Croft, Llandaff Road548 m away | 220 m² | 259 m² | +39 m² +18% | 2021 |
|---|
| 67, Fairleigh Road328 m away | 95 m² | 132 m² | +37 m² +39% | 2023 |
|---|
| 15, Fields Park Road396 m away | 172 m² | 209 m² | +37 m² +22% | 2022 |
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| 39, Market Road641 m away | 94 m² | 130 m² | +36 m² +38% | 2022 |
|---|
| 55, North Road868 m away | 88 m² | 124 m² | +36 m² +41% | 2018 |
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| 201, Cathedral Road91 m away | 61 m² | 97 m² | +36 m² +59% | 2014 |
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| 75, Romilly Crescent411 m away | 150 m² | 186 m² | +36 m² +24% | 2014 |
|---|
| 1, Tintern Street996 m away | 66 m² | 102 m² | +36 m² +55% | 2012 |
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| Flat 2, 38, Glamorgan Street707 m away | 43 m² | 79 m² | +36 m² +84% | 2010 |
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| 112, Pembroke Road824 m away | 89 m² | 124 m² | +35 m² +39% | 2024 |
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| 136b, Llandaff Road506 m away | 104 m² | 139 m² | +35 m² +34% | 2019 |
|---|
| 190, Cathedral Road138 m away | 53 m² | 88 m² | +35 m² +66% | 2010 |
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| 13, Fairleigh Road465 m away | 118 m² | 152 m² | +34 m² +29% | 2025 |
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| 12, North Road880 m away | 76 m² | 110 m² | +34 m² +45% | 2023 |
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| 37, Severn Grove194 m away | 48 m² | 82 m² | +34 m² +71% | 2021 |
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| 29, Plasturton Gardens343 m away | 141 m² | 175 m² | +34 m² +24% | 2021 |
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| 27, Neville Street957 m away | 193 m² | 227 m² | +34 m² +18% | 2021 |
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| 123, Clive Road989 m away | 113 m² | 147 m² | +34 m² +30% | 2013 |
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| 67, Plasturton Avenue117 m away | 171 m² | 204 m² | +33 m² +19% | 2023 |
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| 51, Canton Court792 m away | 50 m² | 83 m² | +33 m² +66% | 2023 |
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| 97, Kings Road425 m away | 149 m² | 182 m² | +33 m² +22% | 2021 |
|---|
| 1a, Teilo Street213 m away | 144 m² | 177 m² | +33 m² +23% | 2020 |
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| 105, Cowbridge Road East882 m away | 96 m² | 129 m² | +33 m² +34% | 2019 |
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| 21, Blackweir Terrace962 m away | 78 m² | 111 m² | +33 m² +42% | 2014 |
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| Flat 28, Edinburgh Court, Wyndham Place968 m away | 34 m² | 67 m² | +33 m² +97% | 2013 |
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| 29, Rectory Road545 m away | 46 m² | 79 m² | +33 m² +72% | 2012 |
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| 108, Wyndham Road349 m away | 93 m² | 126 m² | +33 m² +35% | 2011 |
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| 98, Clive Road975 m away | 140 m² | 173 m² | +33 m² +24% | 2010 |
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| 6, Hamilton Street622 m away | 134 m² | 167 m² | +33 m² +25% | 2009 |
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| 12, Preswylfa Street889 m away | 93 m² | 125 m² | +32 m² +34% | 2026 |
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| Flat 1, Kings Mews, Kings Road655 m away | 35 m² | 67 m² | +32 m² +91% | 2025 |
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| Flat 4, 86, Cathedral Road309 m away | 55 m² | 87 m² | +32 m² +58% | 2021 |
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| 119, Cathedral Road214 m away | 53 m² | 85 m² | +32 m² +60% | 2020 |
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| 176, Colum Road910 m away | 103 m² | 135 m² | +32 m² +31% | 2017 |
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| 30, Wells Street987 m away | 84 m² | 116 m² | +32 m² +38% | 2014 |
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| 35, Pen Y Peel Road752 m away | 82 m² | 113 m² | +31 m² +38% | 2023 |
|---|
| 12, Hamilton Street622 m away | 141 m² | 172 m² | +31 m² +22% | 2022 |
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| 22, Canton Court792 m away | 94 m² | 125 m² | +31 m² +33% | 2014 |
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| 92, Wyndham Crescent460 m away | 57 m² | 88 m² | +31 m² +54% | 2013 |
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| 29, Pontcanna Street146 m away | 122 m² | 152 m² | +30 m² +25% | 2020 |
|---|
| 1, Penhill Road352 m away | 58 m² | 88 m² | +30 m² +52% | 2019 |
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| 106, Clive Road975 m away | 129 m² | 159 m² | +30 m² +23% | 2019 |
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| 41, Kings Road555 m away | 61 m² | 91 m² | +30 m² +49% | 2017 |
|---|
| 31, Hamilton Street622 m away | 130 m² | 160 m² | +30 m² +23% | 2017 |
|---|
| 26, Romilly Road918 m away | 57 m² | 87 m² | +30 m² +53% | 2010 |
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| 355, Cowbridge Road East888 m away | 29 m² | 59 m² | +30 m² +103% | 2009 |
|---|
| 9, Wyndham Road433 m away | 91 m² | 120 m² | +29 m² +32% | 2025 |
|---|
| 3, Egham Street864 m away | 99 m² | 128 m² | +29 m² +29% | 2022 |
|---|
| 11, Wyndham Place897 m away | 84 m² | 113 m² | +29 m² +35% | 2022 |
|---|
| 104 - 108, Cathedral Road232 m away | 68 m² | 97 m² | +29 m² +43% | 2021 |
|---|
| 36, Wyndham Road433 m away | 78 m² | 107 m² | +29 m² +37% | 2020 |
|---|
| 24, Llanfair Road390 m away | 106 m² | 135 m² | +29 m² +27% | 2016 |
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| 47, Pontcanna Street120 m away | 124 m² | 153 m² | +29 m² +23% | 2015 |
|---|
| 28, Major Road928 m away | 108 m² | 136 m² | +28 m² +26% | 2026 |
|---|
| 11, Hamilton Street622 m away | 136 m² | 164 m² | +28 m² +21% | 2021 |
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| 7, Beda Road894 m away | 94 m² | 122 m² | +28 m² +30% | 2020 |
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| 95c, Severn Grove240 m away | 28 m² | 56 m² | +28 m² +100% | 2011 |
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| 18, Glamorgan Street707 m away | 79 m² | 106 m² | +27 m² +34% | 2025 |
|---|
| 16, Romilly Crescent338 m away | 69 m² | 96 m² | +27 m² +39% | 2024 |
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| 31, Blackweir Terrace962 m away | 73 m² | 100 m² | +27 m² +37% | 2018 |
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| 11, Cumberland Street947 m away | 97 m² | 123 m² | +26 m² +27% | 2021 |
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| 90, Wyndham Crescent460 m away | 63 m² | 89 m² | +26 m² +41% | 2020 |
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| 28, Alexandra Road827 m away | 88 m² | 114 m² | +26 m² +30% | 2017 |
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| 103, Cowbridge Road East882 m away | 24 m² | 50 m² | +26 m² +108% | 2012 |
|---|
| 3, Fields Park Road396 m away | 153 m² | 179 m² | +26 m² +17% | 2011 |
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| 11, Bloom Street489 m away | 76 m² | 101 m² | +25 m² +33% | 2025 |
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| 7, Mortimer Road207 m away | 87 m² | 112 m² | +25 m² +29% | 2024 |
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| 18, Carmarthen Street547 m away | 80 m² | 105 m² | +25 m² +31% | 2024 |
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| 62, Kings Road416 m away | 128 m² | 153 m² | +25 m² +20% | 2023 |
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| 14, Cumberland Street947 m away | 62 m² | 87 m² | +25 m² +40% | 2019 |
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| 59, Romilly Crescent411 m away | 70 m² | 95 m² | +25 m² +36% | 2018 |
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| 6, Library Street648 m away | 129 m² | 154 m² | +25 m² +19% | 2018 |
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| 128, Severn Grove240 m away | 49 m² | 74 m² | +25 m² +51% | 2013 |
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| 30, Brecon Street859 m away | 100 m² | 125 m² | +25 m² +25% | 2013 |
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| 73, Kings Road425 m away | 63 m² | 88 m² | +25 m² +40% | 2011 |
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| 2, Church Road762 m away | 129 m² | 153 m² | +24 m² +19% | 2026 |
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| 33b, Fields Park Road396 m away | 52 m² | 76 m² | +24 m² +46% | 2025 |
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| 99, Fairleigh Road328 m away | 83 m² | 107 m² | +24 m² +29% | 2024 |
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| 10, Rawden Place990 m away | 123 m² | 147 m² | +24 m² +20% | 2023 |
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| 4, Rawden Place990 m away | 119 m² | 143 m² | +24 m² +20% | 2023 |
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| 4, Cardigan Court688 m away | 46 m² | 70 m² | +24 m² +52% | 2021 |
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| 51, Plasturton Avenue198 m away | 153 m² | 177 m² | +24 m² +16% | 2017 |
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| 68, Cathedral Road430 m away | 50 m² | 74 m² | +24 m² +48% | 2016 |
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| 21, Penhill Road468 m away | 62 m² | 86 m² | +24 m² +39% | 2016 |
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| 5, Mortimer Road207 m away | 102 m² | 126 m² | +24 m² +24% | 2011 |
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| 3, Bloom Street489 m away | 71 m² | 94 m² | +23 m² +32% | 2026 |
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| Flat 1, Conway Court, 18, Penhill Road468 m away | 117 m² | 139 m² | +22 m² +19% | 2025 |
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| 33, West Lee843 m away | 58 m² | 80 m² | +22 m² +38% | 2021 |
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| 34, Wyndham Crescent593 m away | 101 m² | 123 m² | +22 m² +22% | 2016 |
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| 3, Colum Place958 m away | 98 m² | 120 m² | +22 m² +22% | 2016 |
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| 16, Conway Road306 m away | 59 m² | 81 m² | +22 m² +37% | 2014 |
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| 1, Egerton Mews915 m away | 87 m² | 109 m² | +22 m² +25% | 2012 |
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| 67, Romilly Crescent411 m away | 16 m² | 38 m² | +22 m² +138% | 2010 |
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| 139, Cathedral Road105 m away | 24 m² | 46 m² | +22 m² +92% | 2009 |
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| 2, Fairleigh Road465 m away | 107 m² | 128 m² | +21 m² +20% | 2025 |
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| 70, Hamilton Street633 m away | 124 m² | 145 m² | +21 m² +17% | 2023 |
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| 75, Cowbridge Road East882 m away | 45 m² | 66 m² | +21 m² +47% | 2023 |
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| 10, Wyndham Place897 m away | 92 m² | 113 m² | +21 m² +23% | 2022 |
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| 37, Talbot Street558 m away | 136 m² | 157 m² | +21 m² +15% | 2021 |
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| Flat 9, Caernarvon Court, Conway Road354 m away | 44 m² | 65 m² | +21 m² +48% | 2020 |
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| Coach House, 122a, Pembroke Road824 m away | 78 m² | 99 m² | +21 m² +27% | 2019 |
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| 95, Cathedral Road330 m away | 51 m² | 72 m² | +21 m² +41% | 2015 |
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| 6, Ryder Street696 m away | 129 m² | 150 m² | +21 m² +16% | 2015 |
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| 32, Rectory Road545 m away | 102 m² | 123 m² | +21 m² +21% | 2014 |
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| 11, Eton Place874 m away | 111 m² | 132 m² | +21 m² +19% | 2014 |
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| 50, Alexandra Road958 m away | 74 m² | 94 m² | +20 m² +27% | 2026 |
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| Apartment 13, Cathedral House, Hamilton Street664 m away | 96 m² | 116 m² | +20 m² +21% | 2025 |
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| 13, Anglesey Street800 m away | 88 m² | 108 m² | +20 m² +23% | 2025 |
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| 28, Brecon Street859 m away | 91 m² | 111 m² | +20 m² +22% | 2023 |
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| 74, Llanfair Road459 m away | 112 m² | 132 m² | +20 m² +18% | 2022 |
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| 11, Maldwyn Street313 m away | 120 m² | 140 m² | +20 m² +17% | 2021 |
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| 32, Carmarthen Street627 m away | 76 m² | 96 m² | +20 m² +26% | 2020 |
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| 6, Glamorgan Street Mews743 m away | 54 m² | 74 m² | +20 m² +37% | 2019 |
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| 10, Earle Place815 m away | 113 m² | 133 m² | +20 m² +18% | 2014 |
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| 6, St Johns Crescent841 m away | 35 m² | 55 m² | +20 m² +57% | 2013 |
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| 40, Severn Grove281 m away | 97 m² | 116 m² | +19 m² +20% | 2021 |
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| 16, Leckwith Road861 m away | 113 m² | 132 m² | +19 m² +17% | 2021 |
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| 32, Chancery Lane974 m away | 76 m² | 95 m² | +19 m² +25% | 2021 |
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| 17, Blackweir Terrace962 m away | 69 m² | 88 m² | +19 m² +28% | 2020 |
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| 43, Wyndham Street985 m away | 68 m² | 87 m² | +19 m² +28% | 2020 |
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| 11, Turberville Place417 m away | 120 m² | 139 m² | +19 m² +16% | 2019 |
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| 43, Radnor Road804 m away | 79 m² | 98 m² | +19 m² +24% | 2019 |
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| Flat 4, 95, Cathedral Road330 m away | 30 m² | 49 m² | +19 m² +63% | 2018 |
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| 138a, Llandaff Road506 m away | 101 m² | 120 m² | +19 m² +19% | 2014 |
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| 36, Severn Grove281 m away | 92 m² | 111 m² | +19 m² +21% | 2011 |
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| 12 Gwynt Mews, 30, Cathedral Road599 m away | 52 m² | 70 m² | +18 m² +35% | 2026 |
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| 5, Egham Street864 m away | 102 m² | 120 m² | +18 m² +18% | 2024 |
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| 35, Egerton Street915 m away | 109 m² | 127 m² | +18 m² +17% | 2024 |
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| 186, Llandaff Road548 m away | 41 m² | 59 m² | +18 m² +44% | 2022 |
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| 27, Radnor Road804 m away | 97 m² | 115 m² | +18 m² +19% | 2022 |
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| 1, Bloom Street489 m away | 73 m² | 91 m² | +18 m² +25% | 2021 |
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| 28, Brunswick Street851 m away | 93 m² | 111 m² | +18 m² +19% | 2021 |
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| 13, Chancery Lane997 m away | 75 m² | 93 m² | +18 m² +24% | 2020 |
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| 113, Kings Road425 m away | 61 m² | 79 m² | +18 m² +30% | 2017 |
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| 137, Clive Road975 m away | 66 m² | 84 m² | +18 m² +27% | 2015 |
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| The Town House, 5, Romilly Road600 m away | 58 m² | 76 m² | +18 m² +31% | 2014 |
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| 138, Cathedral Road59 m away | 60 m² | 78 m² | +18 m² +30% | 2010 |
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| 3, Lock Keepers Court, Blackweir Terrace910 m away | 62 m² | 80 m² | +18 m² +29% | 2010 |
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| 154, Cathedral Road70 m away | 50 m² | 68 m² | +18 m² +36% | 2009 |
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| 14, Romilly Road918 m away | 30 m² | 48 m² | +18 m² +60% | 2009 |
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| 3, Dogo Street149 m away | 74 m² | 91 m² | +17 m² +23% | 2025 |
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| 76, Wyndham Road349 m away | 90 m² | 107 m² | +17 m² +19% | 2025 |
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| 4, Mortimer Road207 m away | 92 m² | 109 m² | +17 m² +18% | 2024 |
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| 13, Severn Grove281 m away | 77 m² | 94 m² | +17 m² +22% | 2024 |
|---|
| 19, Lock Keepers Court, Blackweir Terrace910 m away | 65 m² | 82 m² | +17 m² +26% | 2022 |
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| 79, Hamilton Street633 m away | 71 m² | 88 m² | +17 m² +24% | 2017 |
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| 2, Wyndham Place897 m away | 90 m² | 107 m² | +17 m² +19% | 2016 |
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| 63, Cathedral Road424 m away | 34 m² | 51 m² | +17 m² +50% | 2015 |
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| Flat 5, Cathedral Parc, 4, Cathedral Road906 m away | 28 m² | 44 m² | +16 m² +57% | 2026 |
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| 5, Parry Street611 m away | 56 m² | 72 m² | +16 m² +29% | 2022 |
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| 2, Meadow Street469 m away | 73 m² | 89 m² | +16 m² +22% | 2021 |
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| 1, Neville Street957 m away | 40 m² | 56 m² | +16 m² +40% | 2021 |
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| 72, Wyndham Road349 m away | 105 m² | 121 m² | +16 m² +15% | 2020 |
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| 74, Pen Y Peel Road752 m away | 84 m² | 100 m² | +16 m² +19% | 2020 |
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| 32, Penllyn Road798 m away | 101 m² | 117 m² | +16 m² +16% | 2020 |
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| 18, St Johns Crescent841 m away | 54 m² | 70 m² | +16 m² +30% | 2019 |
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| 93a, Cowbridge Road East882 m away | 64 m² | 80 m² | +16 m² +25% | 2019 |
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| 89, Cathedral Road330 m away | 42 m² | 58 m² | +16 m² +38% | 2016 |
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| Flat 2, 86, Cathedral Road309 m away | 64 m² | 80 m² | +16 m² +25% | 2010 |
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| 184, Cathedral Road138 m away | 40 m² | 56 m² | +16 m² +40% | 2009 |
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| 185, Cathedral Road91 m away | 49 m² | 65 m² | +16 m² +33% | 2008 |
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| 40, Glynne Street461 m away | 72 m² | 88 m² | +16 m² +22% | 2008 |
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| 45, Severn Road550 m away | 93 m² | 108 m² | +15 m² +16% | 2026 |
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