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 CF23 5AQ
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 |
|---|---|---|---|---|
| 268, Newport Road360 m away | 163 m² | 330 m² | +167 m² +102% | 2023 |
| 2, Westville Walk803 m away | 91 m² | 217 m² | +126 m² +138% | 2017 |
| 150, Pen Y Lan Road978 m away | 114 m² | 231 m² | +117 m² +103% | 2026 |
| 31, Waterloo Road578 m away | 79 m² | 189 m² | +110 m² +139% | 2021 |
| 217, Albany Road421 m away | 89 m² | 170 m² | +81 m² +91% | 2012 |
| 26, Blanche Street472 m away | 78 m² | 156 m² | +78 m² +100% | 2022 |
| 75, Pen Y Lan Road929 m away | 163 m² | 240 m² | +77 m² +47% | 2023 |
| 50, Theodora Street594 m away | 96 m² | 172 m² | +76 m² +79% | 2025 |
| 1, Moorland Road837 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.
| 106 m² |
| 181 m² |
| +75 m² +71% |
| 2026 |
| 196, Albany Road398 m away | 141 m² | 214 m² | +73 m² +52% | 2019 |
|---|
| 9, Ninian Road951 m away | 117 m² | 188 m² | +71 m² +61% | 2023 |
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| 17, Cressy Road662 m away | 68 m² | 138 m² | +70 m² +103% | 2022 |
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| 64, Elm Street944 m away | 78 m² | 146 m² | +68 m² +87% | 2025 |
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| 62, Roath Court Road562 m away | 64 m² | 132 m² | +68 m² +106% | 2023 |
|---|
| 11, Ffordd Nowell427 m away | 50 m² | 117 m² | +67 m² +134% | 2011 |
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| 3, Ffordd Nowell427 m away | 50 m² | 117 m² | +67 m² +134% | 2011 |
|---|
| 64, Richards Terrace384 m away | 60 m² | 126 m² | +66 m² +110% | 2020 |
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| 13, Roath Court Road562 m away | 56 m² | 121 m² | +65 m² +116% | 2023 |
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| 5, Pen Y Lan Road808 m away | 74 m² | 137 m² | +63 m² +85% | 2018 |
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| 22, Waterloo Road304 m away | 90 m² | 153 m² | +63 m² +70% | 2010 |
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| 44, Deri Road246 m away | 61 m² | 122 m² | +61 m² +100% | 2012 |
|---|
| 112, Glenroy Street950 m away | 67 m² | 127 m² | +60 m² +90% | 2014 |
|---|
| 7, Ffordd Nowell427 m away | 57 m² | 117 m² | +60 m² +105% | 2011 |
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| 1, Ffordd Nowell427 m away | 58 m² | 117 m² | +59 m² +102% | 2011 |
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| 5, Ffordd Nowell427 m away | 58 m² | 117 m² | +59 m² +102% | 2011 |
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| 95, Kimberley Road433 m away | 116 m² | 173 m² | +57 m² +49% | 2025 |
|---|
| 112, Cyfarthfa Street890 m away | 97 m² | 154 m² | +57 m² +59% | 2019 |
|---|
| 4, Hart Place968 m away | 131 m² | 187 m² | +56 m² +43% | 2025 |
|---|
| 42, Stacey Road515 m away | 59 m² | 113 m² | +54 m² +92% | 2018 |
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| 11, Broadway774 m away | 46 m² | 100 m² | +54 m² +117% | 2018 |
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| 18, Connaught Road585 m away | 63 m² | 117 m² | +54 m² +86% | 2011 |
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| 81, Clydesmuir Road791 m away | 76 m² | 129 m² | +53 m² +70% | 2016 |
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| 113, Claude Road781 m away | 56 m² | 109 m² | +53 m² +95% | 2008 |
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| 51, Earl'S Court Road770 m away | 105 m² | 157 m² | +52 m² +50% | 2025 |
|---|
| Flat 2, 11a, Claude Place753 m away | 82 m² | 133 m² | +51 m² +62% | 2015 |
|---|
| 11, Deri Road274 m away | 109 m² | 157 m² | +48 m² +44% | 2026 |
|---|
| 82, Richards Terrace384 m away | 148 m² | 194 m² | +46 m² +31% | 2024 |
|---|
| 79, Westville Road413 m away | 144 m² | 190 m² | +46 m² +32% | 2023 |
|---|
| 13, Pen Y Lan Road808 m away | 55 m² | 101 m² | +46 m² +84% | 2019 |
|---|
| 253, Albany Road421 m away | 134 m² | 180 m² | +46 m² +34% | 2018 |
|---|
| Flat 1, 78, Pen Y Lan Road843 m away | 77 m² | 122 m² | +45 m² +58% | 2022 |
|---|
| 27, Piercefield Place996 m away | 38 m² | 82 m² | +44 m² +116% | 2009 |
|---|
| 1, Cyril Crescent738 m away | 121 m² | 164 m² | +43 m² +36% | 2022 |
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| 4, Firstbrook Close666 m away | 76 m² | 119 m² | +43 m² +57% | 2014 |
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| 11, Newminster Road76 m away | 121 m² | 163 m² | +42 m² +35% | 2023 |
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| 14, Southminster Road136 m away | 126 m² | 168 m² | +42 m² +33% | 2023 |
|---|
| 37, Timbers Square377 m away | 99 m² | 141 m² | +42 m² +42% | 2023 |
|---|
| 176, Broadway392 m away | 114 m² | 156 m² | +42 m² +37% | 2022 |
|---|
| 34, Southcourt Road820 m away | 147 m² | 189 m² | +42 m² +29% | 2021 |
|---|
| 11, Beaufort Square952 m away | 52 m² | 94 m² | +42 m² +81% | 2020 |
|---|
| 3a, Ty-Draw Road989 m away | 77 m² | 119 m² | +42 m² +55% | 2019 |
|---|
| 3, Skaithmuir Road800 m away | 56 m² | 98 m² | +42 m² +75% | 2016 |
|---|
| 114, Treharris Street887 m away | 83 m² | 125 m² | +42 m² +51% | 2014 |
|---|
| 13, Harrismith Road765 m away | 125 m² | 166 m² | +41 m² +33% | 2026 |
|---|
| 12, Hammond Way735 m away | 68 m² | 109 m² | +41 m² +60% | 2025 |
|---|
| 7, Scholars Drive574 m away | 113 m² | 154 m² | +41 m² +36% | 2023 |
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| 16, Seymour Street950 m away | 94 m² | 135 m² | +41 m² +44% | 2023 |
|---|
| 58, Princes Street431 m away | 116 m² | 157 m² | +41 m² +35% | 2022 |
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| 149, Broadway459 m away | 95 m² | 136 m² | +41 m² +43% | 2022 |
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| 49, Barons Court Road784 m away | 96 m² | 137 m² | +41 m² +43% | 2020 |
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| 28, Claude Road667 m away | 42 m² | 83 m² | +41 m² +98% | 2017 |
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| 18, Kimberley Road746 m away | 173 m² | 214 m² | +41 m² +24% | 2015 |
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| 11, Ravenscourt Close809 m away | 105 m² | 145 m² | +40 m² +38% | 2026 |
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| 21, Earl'S Court Road770 m away | 103 m² | 143 m² | +40 m² +39% | 2025 |
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| 53, Clydesmuir Road892 m away | 93 m² | 133 m² | +40 m² +43% | 2025 |
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| 59, Marlborough Road407 m away | 133 m² | 172 m² | +39 m² +29% | 2026 |
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| 1, Gold Street914 m away | 180 m² | 219 m² | +39 m² +22% | 2025 |
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| 53, Princes Street431 m away | 124 m² | 163 m² | +39 m² +31% | 2024 |
|---|
| 1, Trafalgar Court, 114, Penylan Road850 m away | 47 m² | 86 m² | +39 m² +83% | 2018 |
|---|
| 28, Pearl Street875 m away | 119 m² | 158 m² | +39 m² +33% | 2016 |
|---|
| 80, Claude Road746 m away | 69 m² | 108 m² | +39 m² +57% | 2014 |
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| 12, Southminster Road136 m away | 118 m² | 157 m² | +39 m² +33% | 2013 |
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| 64, Oakfield Street748 m away | 76 m² | 115 m² | +39 m² +51% | 2012 |
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| 16, Marlborough Road729 m away | 29 m² | 68 m² | +39 m² +134% | 2010 |
|---|
| 1, Pen Y Lan Place981 m away | 42 m² | 81 m² | +39 m² +93% | 2009 |
|---|
| 37, Broadway646 m away | 28 m² | 66 m² | +38 m² +136% | 2024 |
|---|
| 101, Ffordd Nowell298 m away | 76 m² | 114 m² | +38 m² +50% | 2023 |
|---|
| 106, Roath Court Road416 m away | 101 m² | 139 m² | +38 m² +38% | 2022 |
|---|
| 103, Connaught Road703 m away | 56 m² | 94 m² | +38 m² +68% | 2021 |
|---|
| 10, Emerald Street848 m away | 101 m² | 139 m² | +38 m² +38% | 2021 |
|---|
| 100, Roath Court Road416 m away | 150 m² | 188 m² | +38 m² +25% | 2020 |
|---|
| 6, Cyril Crescent738 m away | 41 m² | 79 m² | +38 m² +93% | 2018 |
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| 26, Connaught Road630 m away | 28 m² | 66 m² | +38 m² +136% | 2009 |
|---|
| 62, Claude Road746 m away | 27 m² | 65 m² | +38 m² +141% | 2009 |
|---|
| 35, Southminster Road136 m away | 115 m² | 152 m² | +37 m² +32% | 2023 |
|---|
| 38, Barons Court Road631 m away | 86 m² | 123 m² | +37 m² +43% | 2020 |
|---|
| 112, Arran Street834 m away | 71 m² | 108 m² | +37 m² +52% | 2018 |
|---|
| 39, Waterloo Gardens174 m away | 95 m² | 131 m² | +36 m² +38% | 2025 |
|---|
| 20, Sandringham Road457 m away | 111 m² | 147 m² | +36 m² +32% | 2024 |
|---|
| 234, Albany Road286 m away | 92 m² | 128 m² | +36 m² +39% | 2019 |
|---|
| 121a, Railway Street937 m away | 61 m² | 97 m² | +36 m² +59% | 2018 |
|---|
| 9, Timbers Square377 m away | 92 m² | 128 m² | +36 m² +39% | 2016 |
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| 18, Theodora Street594 m away | 99 m² | 135 m² | +36 m² +36% | 2016 |
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| 52, Connaught Road645 m away | 37 m² | 73 m² | +36 m² +97% | 2009 |
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| 58, Connaught Road645 m away | 67 m² | 103 m² | +36 m² +54% | 2009 |
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| 26, Axminster Road61 m away | 108 m² | 143 m² | +35 m² +32% | 2026 |
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| 40, Cottrell Road749 m away | 66 m² | 101 m² | +35 m² +53% | 2025 |
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| 17, Diamond Street970 m away | 115 m² | 150 m² | +35 m² +30% | 2021 |
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| 53, Hampton Court Road778 m away | 108 m² | 143 m² | +35 m² +32% | 2017 |
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| 111, Broadway532 m away | 114 m² | 149 m² | +35 m² +31% | 2016 |
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| 84, Connaught Road637 m away | 32 m² | 67 m² | +35 m² +109% | 2009 |
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| 26, Claude Road667 m away | 65 m² | 100 m² | +35 m² +54% | 2008 |
|---|
| 17, Princes Street535 m away | 114 m² | 148 m² | +34 m² +30% | 2026 |
|---|
| 109, Pearl Street768 m away | 67 m² | 101 m² | +34 m² +51% | 2026 |
|---|
| 39, Stallcourt Avenue216 m away | 95 m² | 129 m² | +34 m² +36% | 2022 |
|---|
| 37, Kimberley Road671 m away | 78 m² | 112 m² | +34 m² +44% | 2022 |
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| 46, Melrose Avenue721 m away | 119 m² | 153 m² | +34 m² +29% | 2022 |
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| 40, Topaz Street928 m away | 96 m² | 130 m² | +34 m² +35% | 2022 |
|---|
| 11, Southminster Road136 m away | 129 m² | 163 m² | +34 m² +26% | 2021 |
|---|
| 327, Newport Road265 m away | 129 m² | 163 m² | +34 m² +26% | 2021 |
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| 18, Mafeking Road702 m away | 119 m² | 153 m² | +34 m² +29% | 2021 |
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| 72, Waterloo Road770 m away | 144 m² | 178 m² | +34 m² +24% | 2016 |
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| 47, Amesbury Road474 m away | 83 m² | 116 m² | +33 m² +40% | 2025 |
|---|
| 34, Spring Gardens Terrace508 m away | 55 m² | 88 m² | +33 m² +60% | 2025 |
|---|
| 51, Melrose Avenue496 m away | 109 m² | 142 m² | +33 m² +30% | 2024 |
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| 19, Earl'S Court Road647 m away | 103 m² | 136 m² | +33 m² +32% | 2024 |
|---|
| 1, Muirton Road968 m away | 37 m² | 70 m² | +33 m² +89% | 2019 |
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| 60, Kimberley Road573 m away | 140 m² | 173 m² | +33 m² +24% | 2017 |
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| 8, Amesbury Road561 m away | 97 m² | 129 m² | +32 m² +33% | 2025 |
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| 21, Winchester Avenue862 m away | 162 m² | 194 m² | +32 m² +20% | 2025 |
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| 21, Diamond Street970 m away | 74 m² | 105 m² | +31 m² +42% | 2025 |
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| 127, Clydesmuir Road791 m away | 78 m² | 109 m² | +31 m² +40% | 2024 |
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| 15, Clydesmuir Road892 m away | 109 m² | 140 m² | +31 m² +28% | 2022 |
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| 120, Ffordd Nowell298 m away | 75 m² | 106 m² | +31 m² +41% | 2021 |
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| 137, Ffordd Nowell298 m away | 87 m² | 118 m² | +31 m² +36% | 2021 |
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| 50, Sandringham Road303 m away | 71 m² | 102 m² | +31 m² +44% | 2021 |
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| 146, Carlisle Street899 m away | 108 m² | 139 m² | +31 m² +29% | 2021 |
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| 31, Richards Terrace390 m away | 72 m² | 103 m² | +31 m² +43% | 2016 |
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| 219, Albany Road421 m away | 33 m² | 64 m² | +31 m² +94% | 2011 |
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| 63, Oakfield Street748 m away | 155 m² | 185 m² | +30 m² +19% | 2026 |
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| 24, Cecil Street650 m away | 100 m² | 130 m² | +30 m² +30% | 2025 |
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| 73, Ffordd Nowell298 m away | 86 m² | 116 m² | +30 m² +35% | 2020 |
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| 45, Ffordd Nowell427 m away | 28 m² | 58 m² | +30 m² +107% | 2020 |
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| 1, Melrose Apartments, 119, Pen Y Lan Road897 m away | 80 m² | 110 m² | +30 m² +38% | 2019 |
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| 117, Broadway532 m away | 31 m² | 61 m² | +30 m² +97% | 2018 |
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| 42, Bradley Street537 m away | 111 m² | 141 m² | +30 m² +27% | 2009 |
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| 60, Claude Road746 m away | 47 m² | 77 m² | +30 m² +64% | 2009 |
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| 15, Seymour Street950 m away | 94 m² | 123 m² | +29 m² +31% | 2025 |
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| 26, Colchester Avenue751 m away | 180 m² | 209 m² | +29 m² +16% | 2024 |
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| 51, Ffordd Nowell427 m away | 28 m² | 57 m² | +29 m² +104% | 2023 |
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| 33, Melrose Avenue721 m away | 123 m² | 152 m² | +29 m² +24% | 2021 |
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| 31, Roath Court Place461 m away | 94 m² | 123 m² | +29 m² +31% | 2020 |
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| 9, Princes Avenue518 m away | 128 m² | 157 m² | +29 m² +23% | 2019 |
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| 25, Barons Court Road784 m away | 97 m² | 126 m² | +29 m² +30% | 2019 |
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| 146, Treharris Street808 m away | 70 m² | 99 m² | +29 m² +41% | 2019 |
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| 254, Newport Road295 m away | 45 m² | 74 m² | +29 m² +64% | 2018 |
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| Flat 6, 112, Connaught Road703 m away | 41 m² | 70 m² | +29 m² +71% | 2018 |
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| 8, Gold Street914 m away | 20 m² | 49 m² | +29 m² +145% | 2018 |
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| 67, Kimberley Road573 m away | 75 m² | 104 m² | +29 m² +39% | 2015 |
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| 111, Connaught Road703 m away | 30 m² | 59 m² | +29 m² +97% | 2009 |
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| 49, Ffordd Nowell427 m away | 28 m² | 56 m² | +28 m² +100% | 2025 |
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| 29, Stallcourt Avenue216 m away | 98 m² | 126 m² | +28 m² +29% | 2024 |
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| 55, Marlborough Road407 m away | 82 m² | 110 m² | +28 m² +34% | 2022 |
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| 95, Clydesmuir Road791 m away | 71 m² | 99 m² | +28 m² +39% | 2022 |
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| 49, Amesbury Road474 m away | 87 m² | 115 m² | +28 m² +32% | 2021 |
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| 71, Keppoch Street963 m away | 108 m² | 136 m² | +28 m² +26% | 2020 |
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| 198, Albany Road398 m away | 150 m² | 178 m² | +28 m² +19% | 2016 |
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| 41, Dalmuir Road920 m away | 58 m² | 86 m² | +28 m² +48% | 2015 |
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| 9, Wellfield Place832 m away | 64 m² | 92 m² | +28 m² +44% | 2013 |
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| Flat 3, 138, Pen Y Lan Road978 m away | 54 m² | 82 m² | +28 m² +52% | 2012 |
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| 89, Connaught Road637 m away | 33 m² | 61 m² | +28 m² +85% | 2011 |
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| 57, Marlborough Road407 m away | 137 m² | 164 m² | +27 m² +20% | 2025 |
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| 72, Arran Street937 m away | 113 m² | 140 m² | +27 m² +24% | 2025 |
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| 8, Southcourt Road706 m away | 130 m² | 157 m² | +27 m² +21% | 2018 |
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| 15, Silver Street968 m away | 98 m² | 125 m² | +27 m² +28% | 2016 |
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| 435, Newport Road463 m away | 86 m² | 113 m² | +27 m² +31% | 2013 |
|---|
| 4, Gold Street914 m away | 55 m² | 82 m² | +27 m² +49% | 2013 |
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| 7, Diamond Street970 m away | 106 m² | 133 m² | +27 m² +25% | 2013 |
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| 99, Stacey Road380 m away | 58 m² | 85 m² | +27 m² +47% | 2011 |
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| 94, Claude Road781 m away | 20 m² | 47 m² | +27 m² +135% | 2009 |
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| 49, Bangor Street972 m away | 115 m² | 142 m² | +27 m² +23% | 2009 |
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| 6, Copper Street987 m away | 102 m² | 128 m² | +26 m² +25% | 2026 |
|---|
| 92, Richards Terrace384 m away | 39 m² | 65 m² | +26 m² +67% | 2025 |
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| 2, Roath Court Place461 m away | 133 m² | 159 m² | +26 m² +20% | 2025 |
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| 17, Ninian Road951 m away | 48 m² | 74 m² | +26 m² +54% | 2025 |
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| 159, Treharris Street808 m away | 76 m² | 102 m² | +26 m² +34% | 2024 |
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| 141, Pearl Street666 m away | 106 m² | 132 m² | +26 m² +25% | 2023 |
|---|
| 33, Roath Court Place461 m away | 134 m² | 160 m² | +26 m² +19% | 2022 |
|---|
| 47, Elm Street944 m away | 113 m² | 139 m² | +26 m² +23% | 2019 |
|---|
| 2, Diamond Street970 m away | 89 m² | 115 m² | +26 m² +29% | 2019 |
|---|
| 236, Albany Road286 m away | 107 m² | 133 m² | +26 m² +24% | 2015 |
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| 50, Partridge Road734 m away | 43 m² | 69 m² | +26 m² +60% | 2013 |
|---|
| 17, Partridge Road776 m away | 45 m² | 71 m² | +26 m² +58% | 2013 |
|---|
| 52, Emerald Street848 m away | 118 m² | 143 m² | +25 m² +21% | 2024 |
|---|
| 6, Hart Place968 m away | 97 m² | 122 m² | +25 m² +26% | 2024 |
|---|
| 121, Ffordd Nowell298 m away | 87 m² | 112 m² | +25 m² +29% | 2021 |
|---|
| 4, Melrose Apartments, 119, Pen Y Lan Road897 m away | 76 m² | 101 m² | +25 m² +33% | 2019 |
|---|
| 1, Wellfield Place832 m away | 128 m² | 153 m² | +25 m² +20% | 2016 |
|---|
| 25, Connaught Road585 m away | 37 m² | 62 m² | +25 m² +68% | 2015 |
|---|
| 10, Kimberley Road746 m away | 134 m² | 159 m² | +25 m² +19% | 2014 |
|---|
| 51, Partridge Road849 m away | 127 m² | 152 m² | +25 m² +20% | 2013 |
|---|
| 77, Connaught Road637 m away | 41 m² | 66 m² | +25 m² +61% | 2010 |
|---|
| 14, Princes Street568 m away | 51 m² | 76 m² | +25 m² +49% | 2009 |
|---|
| 83, Claude Road746 m away | 31 m² | 56 m² | +25 m² +81% | 2009 |
|---|
| 41, Partridge Road776 m away | 100 m² | 125 m² | +25 m² +25% | 2009 |
|---|
| 163a, Albany Road763 m away | 48 m² | 72 m² | +24 m² +50% | 2024 |
|---|
| 49, Kimberley Road573 m away | 157 m² | 181 m² | +24 m² +15% | 2023 |
|---|
| 125, Pearl Street666 m away | 68 m² | 92 m² | +24 m² +35% | 2023 |
|---|
| 24, Claude Road667 m away | 150 m² | 174 m² | +24 m² +16% | 2022 |
|---|
| 41, Elm Street944 m away | 132 m² | 156 m² | +24 m² +18% | 2022 |
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