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 CF10 3EZ
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 Road910 m away | 166 m² | 342 m² | +176 m² +106% | 2016 |
| 93, Cathedral Road949 m away | 116 m² | 280 m² | +164 m² +141% | 2023 |
| 47, Wyeverne Road941 m away | 93 m² | 195 m² | +102 m² +110% | 2015 |
| 28, Wyeverne Road970 m away | 92 m² | 189 m² | +97 m² +105% | 2019 |
| 65, Flora Street596 m away | 103 m² | 197 m² | +94 m² +91% | 2016 |
| 71, Wyeverne Road941 m away | 99 m² | 189 m² | +90 m² +91% | 2013 |
| 174, Colum Road82 m away | 78 m² | 160 m² | +82 m² +105% | 2016 |
| 36, Minny Street674 m away | 94 m² | 174 m² | +80 m² +85% | 2010 |
| 142, Cathays Terrace546 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.
| 79 m² |
| 156 m² |
| +77 m² +97% |
| 2021 |
| 17, Queen Anne Square414 m away | 148 m² | 224 m² | +76 m² +51% | 2015 |
|---|
| 125, Wyeverne Road742 m away | 107 m² | 180 m² | +73 m² +68% | 2023 |
|---|
| 143, Wyeverne Road742 m away | 54 m² | 125 m² | +71 m² +131% | 2019 |
|---|
| 87, Minny Street559 m away | 92 m² | 162 m² | +70 m² +76% | 2012 |
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| 5, Dyfrig Street809 m away | 64 m² | 134 m² | +70 m² +109% | 2008 |
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| 22, Harriet Street864 m away | 102 m² | 171 m² | +69 m² +68% | 2018 |
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| 12, Kyveilog Street801 m away | 76 m² | 142 m² | +66 m² +87% | 2019 |
|---|
| 32c, Merthyr Street348 m away | 77 m² | 142 m² | +65 m² +84% | 2025 |
|---|
| 23, Teilo Street849 m away | 82 m² | 147 m² | +65 m² +79% | 2015 |
|---|
| 67, Flora Street596 m away | 102 m² | 167 m² | +65 m² +64% | 2012 |
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| 85, Wyeverne Road941 m away | 97 m² | 161 m² | +64 m² +66% | 2025 |
|---|
| 101, Cathays Terrace488 m away | 95 m² | 159 m² | +64 m² +67% | 2019 |
|---|
| 2, Australia Road938 m away | 106 m² | 170 m² | +64 m² +60% | 2015 |
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| 31, Wyeverne Road941 m away | 83 m² | 146 m² | +63 m² +76% | 2016 |
|---|
| 13, Flora Street686 m away | 89 m² | 152 m² | +63 m² +71% | 2015 |
|---|
| 125, Cathays Terrace504 m away | 62 m² | 125 m² | +63 m² +102% | 2009 |
|---|
| 13, Colum Road456 m away | 193 m² | 255 m² | +62 m² +32% | 2019 |
|---|
| 34, Wyeverne Road970 m away | 98 m² | 160 m² | +62 m² +63% | 2019 |
|---|
| 30, Colum Road552 m away | 75 m² | 136 m² | +61 m² +81% | 2025 |
|---|
| 78, Plasturton Avenue971 m away | 74 m² | 135 m² | +61 m² +82% | 2024 |
|---|
| 5, Treherbert Street413 m away | 68 m² | 129 m² | +61 m² +90% | 2022 |
|---|
| 10, Flora Street686 m away | 87 m² | 148 m² | +61 m² +70% | 2021 |
|---|
| 3, Fitzroy Street916 m away | 68 m² | 129 m² | +61 m² +90% | 2011 |
|---|
| 41, Woodville Road653 m away | 134 m² | 194 m² | +60 m² +45% | 2025 |
|---|
| 81, Cathays Terrace488 m away | 114 m² | 174 m² | +60 m² +53% | 2013 |
|---|
| 80, Flora Street596 m away | 78 m² | 137 m² | +59 m² +76% | 2024 |
|---|
| 56, May Street659 m away | 88 m² | 147 m² | +59 m² +67% | 2024 |
|---|
| 20, Woodville Road687 m away | 144 m² | 203 m² | +59 m² +41% | 2024 |
|---|
| 49, Wyeverne Road941 m away | 114 m² | 173 m² | +59 m² +52% | 2023 |
|---|
| 72, Flora Street596 m away | 99 m² | 158 m² | +59 m² +60% | 2022 |
|---|
| 22, Flora Street686 m away | 101 m² | 160 m² | +59 m² +58% | 2020 |
|---|
| 22, Treherbert Street413 m away | 70 m² | 128 m² | +58 m² +83% | 2022 |
|---|
| 2, Norman Street971 m away | 85 m² | 143 m² | +58 m² +68% | 2022 |
|---|
| 100, Maindy Road324 m away | 73 m² | 130 m² | +57 m² +78% | 2022 |
|---|
| 19, Queen Anne Square414 m away | 149 m² | 206 m² | +57 m² +38% | 2022 |
|---|
| 38, Wyeverne Road970 m away | 97 m² | 154 m² | +57 m² +59% | 2022 |
|---|
| 3, Flora Street686 m away | 91 m² | 148 m² | +57 m² +63% | 2015 |
|---|
| 104, Richard Street879 m away | 65 m² | 122 m² | +57 m² +88% | 2010 |
|---|
| 18, Hirwain Street396 m away | 77 m² | 133 m² | +56 m² +73% | 2026 |
|---|
| 38, Flora Street596 m away | 107 m² | 163 m² | +56 m² +52% | 2020 |
|---|
| 36, Wyeverne Road970 m away | 98 m² | 154 m² | +56 m² +57% | 2019 |
|---|
| 101, Wyeverne Road742 m away | 90 m² | 146 m² | +56 m² +62% | 2013 |
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| 43, Wyeverne Road941 m away | 71 m² | 125 m² | +54 m² +76% | 2025 |
|---|
| 9, Richards Street802 m away | 104 m² | 158 m² | +54 m² +52% | 2024 |
|---|
| 118, Coburn Street981 m away | 81 m² | 135 m² | +54 m² +67% | 2019 |
|---|
| 2, May Street762 m away | 87 m² | 140 m² | +53 m² +61% | 2023 |
|---|
| 102, Maindy Road324 m away | 76 m² | 129 m² | +53 m² +70% | 2022 |
|---|
| 4, Hirwain Street396 m away | 71 m² | 124 m² | +53 m² +75% | 2019 |
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| 77, Allensbank Road925 m away | 42 m² | 95 m² | +53 m² +126% | 2015 |
|---|
| 42, Llantrisant Street368 m away | 114 m² | 167 m² | +53 m² +46% | 2012 |
|---|
| 37, Treherbert Street413 m away | 61 m² | 114 m² | +53 m² +87% | 2012 |
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| 114, Maindy Road324 m away | 80 m² | 132 m² | +52 m² +65% | 2024 |
|---|
| 10, Woodville Road687 m away | 122 m² | 174 m² | +52 m² +43% | 2021 |
|---|
| 3, Catherine Street581 m away | 91 m² | 143 m² | +52 m² +57% | 2020 |
|---|
| 99, Cathays Terrace488 m away | 55 m² | 107 m² | +52 m² +95% | 2016 |
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| 4, Monthermer Road786 m away | 88 m² | 140 m² | +52 m² +59% | 2014 |
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| 23, Dogfield Street747 m away | 100 m² | 152 m² | +52 m² +52% | 2011 |
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| 32, Hirwain Street396 m away | 68 m² | 119 m² | +51 m² +75% | 2019 |
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| 88, Gelligaer Street496 m away | 90 m² | 141 m² | +51 m² +57% | 2019 |
|---|
| 21, Hirwain Street402 m away | 69 m² | 119 m² | +50 m² +72% | 2025 |
|---|
| 63, Lisvane Street429 m away | 79 m² | 129 m² | +50 m² +63% | 2024 |
|---|
| 23, Merthyr Street362 m away | 75 m² | 125 m² | +50 m² +67% | 2023 |
|---|
| 8, Ruthin Gardens956 m away | 144 m² | 194 m² | +50 m² +35% | 2022 |
|---|
| 48, Thesiger Street985 m away | 80 m² | 130 m² | +50 m² +63% | 2015 |
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| 60, Cathedral Road912 m away | 43 m² | 93 m² | +50 m² +116% | 2013 |
|---|
| 28, Talygarn Street865 m away | 75 m² | 124 m² | +49 m² +65% | 2026 |
|---|
| 13, May Street762 m away | 81 m² | 130 m² | +49 m² +60% | 2020 |
|---|
| 5, Harriet Street837 m away | 103 m² | 152 m² | +49 m² +48% | 2020 |
|---|
| 65, Crwys Road777 m away | 101 m² | 150 m² | +49 m² +49% | 2019 |
|---|
| 92, Maindy Road324 m away | 79 m² | 128 m² | +49 m² +62% | 2016 |
|---|
| 11, Hirwain Street402 m away | 83 m² | 132 m² | +49 m² +59% | 2016 |
|---|
| 12, Minister Street464 m away | 81 m² | 130 m² | +49 m² +60% | 2012 |
|---|
| 50, Africa Gardens851 m away | 98 m² | 146 m² | +48 m² +49% | 2025 |
|---|
| 81, Maindy Road211 m away | 94 m² | 142 m² | +48 m² +51% | 2022 |
|---|
| 106, New Zealand Road698 m away | 70 m² | 118 m² | +48 m² +69% | 2022 |
|---|
| 1, Berthwin Street804 m away | 61 m² | 109 m² | +48 m² +79% | 2021 |
|---|
| 19, Gileston Road899 m away | 125 m² | 173 m² | +48 m² +38% | 2019 |
|---|
| 12, Fitzroy Street916 m away | 74 m² | 122 m² | +48 m² +65% | 2019 |
|---|
| 108, Maindy Road324 m away | 84 m² | 132 m² | +48 m² +57% | 2016 |
|---|
| 4, May Street762 m away | 89 m² | 137 m² | +48 m² +54% | 2015 |
|---|
| 218, Cathays Terrace599 m away | 111 m² | 159 m² | +48 m² +43% | 2013 |
|---|
| 10, May Street762 m away | 94 m² | 142 m² | +48 m² +51% | 2012 |
|---|
| 3, Treherbert Street413 m away | 80 m² | 127 m² | +47 m² +59% | 2026 |
|---|
| 88, Miskin Street883 m away | 141 m² | 188 m² | +47 m² +33% | 2020 |
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| 84, Brithdir Street491 m away | 87 m² | 134 m² | +47 m² +54% | 2019 |
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| 16, Letty Street656 m away | 92 m² | 139 m² | +47 m² +51% | 2019 |
|---|
| 9, Harriet Street837 m away | 100 m² | 147 m² | +47 m² +47% | 2018 |
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| 38, Letty Street576 m away | 66 m² | 113 m² | +47 m² +71% | 2017 |
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| 24, Flora Street686 m away | 105 m² | 152 m² | +47 m² +45% | 2016 |
|---|
| 13, Thesiger Street985 m away | 85 m² | 132 m² | +47 m² +55% | 2015 |
|---|
| Cwrt Soffia, 47 - 53, Cathedral Road994 m away | 81 m² | 128 m² | +47 m² +58% | 2008 |
|---|
| 33, Teilo Street849 m away | 156 m² | 202 m² | +46 m² +29% | 2026 |
|---|
| 79, Brithdir Street491 m away | 76 m² | 122 m² | +46 m² +61% | 2025 |
|---|
| 7, Gelligaer Street587 m away | 48 m² | 94 m² | +46 m² +96% | 2023 |
|---|
| 178, North Road820 m away | 120 m² | 166 m² | +46 m² +38% | 2014 |
|---|
| 99, Harriet Street926 m away | 80 m² | 126 m² | +46 m² +57% | 2014 |
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| 75, Minny Street600 m away | 83 m² | 129 m² | +46 m² +55% | 2010 |
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| 64, Thesiger Street925 m away | 84 m² | 129 m² | +45 m² +54% | 2025 |
|---|
| 14, May Street762 m away | 86 m² | 131 m² | +45 m² +52% | 2024 |
|---|
| 13, Hirwain Street402 m away | 74 m² | 119 m² | +45 m² +61% | 2023 |
|---|
| 35, Brithdir Street479 m away | 72 m² | 117 m² | +45 m² +63% | 2021 |
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| 50, Wyeverne Road970 m away | 91 m² | 136 m² | +45 m² +49% | 2019 |
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| 139a, Cathays Terrace504 m away | 91 m² | 136 m² | +45 m² +49% | 2015 |
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| 17, Daniel Street883 m away | 85 m² | 130 m² | +45 m² +53% | 2015 |
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| 65, Harriet Street909 m away | 63 m² | 108 m² | +45 m² +71% | 2013 |
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| 39, Pentyrch Street323 m away | 120 m² | 165 m² | +45 m² +38% | 2011 |
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| 51, Woodville Road653 m away | 149 m² | 194 m² | +45 m² +30% | 2010 |
|---|
| 34, Harriet Street864 m away | 97 m² | 142 m² | +45 m² +46% | 2010 |
|---|
| 50, Letty Street576 m away | 73 m² | 117 m² | +44 m² +60% | 2024 |
|---|
| 13, Llantrisant Street487 m away | 106 m² | 150 m² | +44 m² +42% | 2022 |
|---|
| 119 And 121, Woodville Road844 m away | 77 m² | 121 m² | +44 m² +57% | 2021 |
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| 52, Flora Street596 m away | 85 m² | 129 m² | +44 m² +52% | 2015 |
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| 16, Wyeverne Road970 m away | 93 m² | 137 m² | +44 m² +47% | 2015 |
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| 2, Rhymney Terrace946 m away | 93 m² | 137 m² | +44 m² +47% | 2013 |
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| Flat 4, 78, Cathedral Road885 m away | 75 m² | 118 m² | +43 m² +57% | 2023 |
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| 122, Lisvane Street456 m away | 140 m² | 183 m² | +43 m² +31% | 2022 |
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| 14, North Road464 m away | 67 m² | 110 m² | +43 m² +64% | 2022 |
|---|
| 86, Maindy Road324 m away | 80 m² | 123 m² | +43 m² +54% | 2021 |
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| 6, Treherbert Street413 m away | 98 m² | 141 m² | +43 m² +44% | 2018 |
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| 18, Rhymney Terrace946 m away | 80 m² | 123 m² | +43 m² +54% | 2018 |
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| 7, Harriet Street837 m away | 111 m² | 154 m² | +43 m² +39% | 2017 |
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| 81, May Street659 m away | 78 m² | 121 m² | +43 m² +55% | 2016 |
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| 31, Hirwain Street402 m away | 71 m² | 114 m² | +43 m² +61% | 2013 |
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| 46, May Street721 m away | 87 m² | 129 m² | +42 m² +48% | 2026 |
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| 1a, Wyeverne Road941 m away | 87 m² | 129 m² | +42 m² +48% | 2026 |
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| 42, Plasturton Gardens993 m away | 212 m² | 254 m² | +42 m² +20% | 2025 |
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| 49, Minny Street600 m away | 110 m² | 152 m² | +42 m² +38% | 2023 |
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| 35, Maindy Road211 m away | 106 m² | 148 m² | +42 m² +40% | 2021 |
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| 70, Maindy Road324 m away | 101 m² | 143 m² | +42 m² +42% | 2019 |
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| 68, Maindy Road324 m away | 99 m² | 141 m² | +42 m² +42% | 2019 |
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| 18, May Street762 m away | 88 m² | 130 m² | +42 m² +48% | 2018 |
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| 31, Dalton Street628 m away | 76 m² | 118 m² | +42 m² +55% | 2016 |
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| 51, Harriet Street909 m away | 65 m² | 107 m² | +42 m² +65% | 2016 |
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| 37, Robert Street884 m away | 80 m² | 121 m² | +41 m² +51% | 2025 |
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| 106, Maindy Road324 m away | 88 m² | 129 m² | +41 m² +47% | 2023 |
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| 93, Richards Street879 m away | 95 m² | 136 m² | +41 m² +43% | 2022 |
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| 118, Cathays Terrace520 m away | 90 m² | 131 m² | +41 m² +46% | 2020 |
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| 29, Cwmdare Street541 m away | 76 m² | 117 m² | +41 m² +54% | 2020 |
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| 42, Letty Street576 m away | 76 m² | 117 m² | +41 m² +54% | 2019 |
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| 93, Allensbank Road925 m away | 115 m² | 156 m² | +41 m² +36% | 2017 |
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| 91, Lisvane Street429 m away | 86 m² | 127 m² | +41 m² +48% | 2016 |
|---|
| 41, Merthyr Street362 m away | 73 m² | 114 m² | +41 m² +56% | 2015 |
|---|
| 8, May Street762 m away | 91 m² | 132 m² | +41 m² +45% | 2014 |
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| 11, Flora Street686 m away | 99 m² | 140 m² | +41 m² +41% | 2013 |
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| 2, Malefant Street713 m away | 157 m² | 197 m² | +40 m² +25% | 2026 |
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| 66, Flora Street596 m away | 99 m² | 139 m² | +40 m² +40% | 2024 |
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| 13, Cosmeston Street345 m away | 97 m² | 137 m² | +40 m² +41% | 2020 |
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| 19, Woodville Road653 m away | 183 m² | 223 m² | +40 m² +22% | 2019 |
|---|
| 52, Llantrisant Street368 m away | 84 m² | 124 m² | +40 m² +48% | 2018 |
|---|
| 37, May Street721 m away | 93 m² | 133 m² | +40 m² +43% | 2018 |
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| 38, Harriet Street864 m away | 118 m² | 158 m² | +40 m² +34% | 2018 |
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| 157, Woodville Road952 m away | 79 m² | 119 m² | +40 m² +51% | 2015 |
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| 18, Harriet Street864 m away | 118 m² | 158 m² | +40 m² +34% | 2013 |
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| 22, Treorchy Street444 m away | 84 m² | 124 m² | +40 m² +48% | 2012 |
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| 105, Wyeverne Road742 m away | 91 m² | 131 m² | +40 m² +44% | 2009 |
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| 7, Dalton Street628 m away | 77 m² | 117 m² | +40 m² +52% | 2008 |
|---|
| 66, Maindy Road324 m away | 89 m² | 128 m² | +39 m² +44% | 2019 |
|---|
| 51, Llantrisant Street387 m away | 80 m² | 119 m² | +39 m² +49% | 2019 |
|---|
| 45, Malefant Street841 m away | 119 m² | 158 m² | +39 m² +33% | 2018 |
|---|
| 10, Darran Street428 m away | 90 m² | 129 m² | +39 m² +43% | 2016 |
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| 126, Woodville Road837 m away | 113 m² | 152 m² | +39 m² +35% | 2014 |
|---|
| 24, Malefant Street713 m away | 107 m² | 146 m² | +39 m² +36% | 2013 |
|---|
| 38, Daniel Street830 m away | 123 m² | 161 m² | +38 m² +31% | 2026 |
|---|
| 85, Brithdir Street491 m away | 82 m² | 120 m² | +38 m² +46% | 2019 |
|---|
| 184, North Road820 m away | 31 m² | 69 m² | +38 m² +123% | 2019 |
|---|
| 145, Cathays Terrace565 m away | 132 m² | 170 m² | +38 m² +29% | 2018 |
|---|
| 168, Woodville Road952 m away | 90 m² | 128 m² | +38 m² +42% | 2015 |
|---|
| 16, Malefant Street713 m away | 108 m² | 146 m² | +38 m² +35% | 2014 |
|---|
| 49, Harriet Street909 m away | 70 m² | 108 m² | +38 m² +54% | 2014 |
|---|
| 1, Treorchy Street444 m away | 85 m² | 123 m² | +38 m² +45% | 2013 |
|---|
| 92, Cathays Terrace520 m away | 84 m² | 121 m² | +37 m² +44% | 2024 |
|---|
| 19, Treherbert Street413 m away | 81 m² | 118 m² | +37 m² +46% | 2023 |
|---|
| 51, Flora Street596 m away | 108 m² | 145 m² | +37 m² +34% | 2023 |
|---|
| 67, Fairleigh Road903 m away | 95 m² | 132 m² | +37 m² +39% | 2023 |
|---|
| 18, Darran Street428 m away | 78 m² | 115 m² | +37 m² +47% | 2018 |
|---|
| 152, Miskin Street750 m away | 98 m² | 135 m² | +37 m² +38% | 2018 |
|---|
| 55, Harriet Street909 m away | 64 m² | 101 m² | +37 m² +58% | 2016 |
|---|
| 26, Fitzroy Street916 m away | 71 m² | 108 m² | +37 m² +52% | 2015 |
|---|
| 14, Flora Street686 m away | 103 m² | 140 m² | +37 m² +36% | 2013 |
|---|
| 69, Richard Street818 m away | 93 m² | 130 m² | +37 m² +40% | 2013 |
|---|
| 16, Ruthin Gardens956 m away | 67 m² | 104 m² | +37 m² +55% | 2009 |
|---|
| 3, Rhigos Gardens278 m away | 92 m² | 128 m² | +36 m² +39% | 2026 |
|---|
| 90, Brithdir Street491 m away | 86 m² | 122 m² | +36 m² +42% | 2023 |
|---|
| 17, Flora Street686 m away | 103 m² | 139 m² | +36 m² +35% | 2019 |
|---|
| 55, North Road45 m away | 88 m² | 124 m² | +36 m² +41% | 2018 |
|---|
| 47, Flora Street596 m away | 82 m² | 118 m² | +36 m² +44% | 2018 |
|---|
| 201, Cathedral Road922 m away | 61 m² | 97 m² | +36 m² +59% | 2014 |
|---|
| 41, Pentyrch Street323 m away | 123 m² | 159 m² | +36 m² +29% | 2012 |
|---|
| 58, Flora Street596 m away | 78 m² | 114 m² | +36 m² +46% | 2011 |
|---|
| 19, Colum Road456 m away | 28 m² | 64 m² | +36 m² +129% | 2009 |
|---|
| 14, Letty Street656 m away | 102 m² | 137 m² | +35 m² +34% | 2023 |
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