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 SO17 3RJ
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 |
|---|---|---|---|---|
| 10, Oakmount Avenue985 m away | 98 m² | 232 m² | +134 m² +137% | 2025 |
| 8, Highfield Lane737 m away | 85 m² | 180 m² | +95 m² +112% | 2020 |
| Estoril, 2e, Westridge Road983 m away | 94 m² | 187 m² | +93 m² +99% | 2022 |
| 12, Highfield Lane737 m away | 89 m² | 170 m² | +81 m² +91% | 2022 |
| 31, Welbeck Avenue182 m away | 91 m² | 172 m² | +81 m² +89% | 2021 |
| 18, Woodcote Road544 m away | 91 m² | 169 m² | +78 m² +86% | 2021 |
| 87, Upper Shaftesbury Avenue59 m away | 64 m² | 140 m² | +76 m² +119% | 2024 |
| 61, Granby Grove154 m away | 89 m² | 164 m² | +75 m² +84% | 2018 |
| 153, Broadlands Road318 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.
| 85 m² |
| 159 m² |
| +74 m² +87% |
| 2019 |
| 175, Burgess Road914 m away | 53 m² | 127 m² | +74 m² +140% | 2012 |
|---|
| 7, Langhorn Road791 m away | 71 m² | 144 m² | +73 m² +103% | 2015 |
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| 8, Russell Place785 m away | 231 m² | 302 m² | +71 m² +31% | 2025 |
|---|
| 14, Oakmount Avenue985 m away | 222 m² | 293 m² | +71 m² +32% | 2024 |
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| 276, Broadlands Road323 m away | 80 m² | 150 m² | +70 m² +88% | 2022 |
|---|
| 89, Tennyson Road900 m away | 120 m² | 190 m² | +70 m² +58% | 2018 |
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| 34, Blenheim Gardens154 m away | 85 m² | 154 m² | +69 m² +81% | 2013 |
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| 46, Ripstone Gardens112 m away | 113 m² | 181 m² | +68 m² +60% | 2020 |
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| 71, Welbeck Avenue182 m away | 237 m² | 303 m² | +66 m² +28% | 2022 |
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| 38, Ripstone Gardens112 m away | 92 m² | 158 m² | +66 m² +72% | 2021 |
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| 1, Blenheim Gardens109 m away | 160 m² | 226 m² | +66 m² +41% | 2019 |
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| 20a, Sirdar Road299 m away | 122 m² | 187 m² | +65 m² +53% | 2024 |
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| 69, Welbeck Avenue182 m away | 174 m² | 239 m² | +65 m² +37% | 2022 |
|---|
| 49, Highfield Crescent344 m away | 121 m² | 185 m² | +64 m² +53% | 2020 |
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| 6, Highfield Lane737 m away | 122 m² | 186 m² | +64 m² +52% | 2020 |
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| 14, Richmond Gardens530 m away | 105 m² | 169 m² | +64 m² +61% | 2018 |
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| 45, Harrison Road531 m away | 94 m² | 156 m² | +62 m² +66% | 2015 |
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| 2a, University Road292 m away | 93 m² | 155 m² | +62 m² +67% | 2014 |
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| 25, Ripstone Gardens94 m away | 105 m² | 166 m² | +61 m² +58% | 2022 |
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| 254, Burgess Road630 m away | 87 m² | 148 m² | +61 m² +70% | 2020 |
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| 51, Granby Grove154 m away | 84 m² | 140 m² | +56 m² +67% | 2024 |
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| 25, Holyrood Avenue275 m away | 117 m² | 173 m² | +56 m² +48% | 2019 |
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| 57, Kitchener Road311 m away | 86 m² | 142 m² | +56 m² +65% | 2011 |
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| 6, Cranford Way496 m away | 91 m² | 145 m² | +54 m² +59% | 2018 |
|---|
| 20a, Highfield Lane737 m away | 60 m² | 113 m² | +53 m² +88% | 2021 |
|---|
| 282, Broadlands Road531 m away | 77 m² | 130 m² | +53 m² +69% | 2018 |
|---|
| 13b, Brookvale Road950 m away | 74 m² | 126 m² | +52 m² +70% | 2020 |
|---|
| 41, Granby Grove154 m away | 93 m² | 144 m² | +51 m² +55% | 2024 |
|---|
| 15, Heatherdeane Road747 m away | 64 m² | 115 m² | +51 m² +80% | 2022 |
|---|
| 34, Brookvale Road790 m away | 215 m² | 266 m² | +51 m² +24% | 2022 |
|---|
| 32, Crofton Close905 m away | 124 m² | 175 m² | +51 m² +41% | 2021 |
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| 87, Tennyson Road900 m away | 124 m² | 175 m² | +51 m² +41% | 2018 |
|---|
| 23, Kitchener Road311 m away | 78 m² | 128 m² | +50 m² +64% | 2013 |
|---|
| 77, Upper Shaftesbury Avenue59 m away | 83 m² | 132 m² | +49 m² +59% | 2019 |
|---|
| 11, Welbeck Avenue182 m away | 194 m² | 243 m² | +49 m² +25% | 2019 |
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| 44, Broadlands Road370 m away | 105 m² | 154 m² | +49 m² +47% | 2014 |
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| 17, Somerset Road385 m away | 85 m² | 134 m² | +49 m² +58% | 2014 |
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| 30, Lilac Road806 m away | 84 m² | 132 m² | +48 m² +57% | 2020 |
|---|
| 22, Granby Grove179 m away | 79 m² | 127 m² | +48 m² +61% | 2010 |
|---|
| 34, Ripstone Gardens112 m away | 122 m² | 169 m² | +47 m² +39% | 2021 |
|---|
| 76, Kitchener Road287 m away | 140 m² | 187 m² | +47 m² +34% | 2021 |
|---|
| 82, Welbeck Avenue264 m away | 141 m² | 188 m² | +47 m² +33% | 2019 |
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| 467, Portswood Road561 m away | 114 m² | 160 m² | +46 m² +40% | 2020 |
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| 90, Honeysuckle Road671 m away | 87 m² | 133 m² | +46 m² +53% | 2020 |
|---|
| 4, Osborne Gardens693 m away | 65 m² | 111 m² | +46 m² +71% | 2020 |
|---|
| 51, Welbeck Avenue182 m away | 103 m² | 149 m² | +46 m² +45% | 2018 |
|---|
| 40, Ripstone Gardens112 m away | 107 m² | 152 m² | +45 m² +42% | 2021 |
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| 17, Merton Road120 m away | 90 m² | 135 m² | +45 m² +50% | 2019 |
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| 8, Granby Grove179 m away | 82 m² | 127 m² | +45 m² +55% | 2018 |
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| 327, Woodmill Lane980 m away | 111 m² | 156 m² | +45 m² +41% | 2013 |
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| 441, Portswood Road561 m away | 92 m² | 136 m² | +44 m² +48% | 2020 |
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| 5, Blenheim Gardens109 m away | 94 m² | 137 m² | +43 m² +46% | 2020 |
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| 8, Grosvenor Road379 m away | 87 m² | 130 m² | +43 m² +49% | 2019 |
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| 44, Granby Grove179 m away | 96 m² | 138 m² | +42 m² +44% | 2021 |
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| 52, Sirdar Road299 m away | 80 m² | 122 m² | +42 m² +53% | 2020 |
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| 33, Highfield Crescent344 m away | 154 m² | 196 m² | +42 m² +27% | 2013 |
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| 250, Portswood Road658 m away | 49 m² | 90 m² | +41 m² +84% | 2025 |
|---|
| 129, Broadlands Road318 m away | 85 m² | 126 m² | +41 m² +48% | 2020 |
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| 36, Mead Crescent857 m away | 84 m² | 125 m² | +41 m² +49% | 2020 |
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| 58, Roselands Gardens518 m away | 119 m² | 159 m² | +40 m² +34% | 2018 |
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| 77, Mayfield Road414 m away | 91 m² | 130 m² | +39 m² +43% | 2024 |
|---|
| 22, Elmsleigh Gardens981 m away | 107 m² | 146 m² | +39 m² +36% | 2023 |
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| 36, Ripstone Gardens112 m away | 127 m² | 166 m² | +39 m² +31% | 2020 |
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| 40, Grosvenor Road511 m away | 136 m² | 175 m² | +39 m² +29% | 2020 |
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| 19, Sirdar Road298 m away | 79 m² | 118 m² | +39 m² +49% | 2019 |
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| 60, Orchards Way812 m away | 98 m² | 137 m² | +39 m² +40% | 2015 |
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| 3, Sherborne Road31 m away | 91 m² | 129 m² | +38 m² +42% | 2019 |
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| 40, Kitchener Road287 m away | 70 m² | 107 m² | +37 m² +53% | 2022 |
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| 3, River View Road998 m away | 82 m² | 119 m² | +37 m² +45% | 2016 |
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| 108, Tennyson Road944 m away | 116 m² | 152 m² | +36 m² +31% | 2025 |
|---|
| 79, Upper Shaftesbury Avenue59 m away | 93 m² | 129 m² | +36 m² +39% | 2021 |
|---|
| 94, Harefield Road668 m away | 87 m² | 123 m² | +36 m² +41% | 2018 |
|---|
| 55, Kitchener Road311 m away | 100 m² | 136 m² | +36 m² +36% | 2015 |
|---|
| 256, Burgess Road630 m away | 88 m² | 123 m² | +35 m² +40% | 2025 |
|---|
| 91, Bluebell Road863 m away | 66 m² | 101 m² | +35 m² +53% | 2022 |
|---|
| 326, Burgess Road892 m away | 99 m² | 134 m² | +35 m² +35% | 2021 |
|---|
| 75, Upper Shaftesbury Avenue59 m away | 90 m² | 125 m² | +35 m² +39% | 2020 |
|---|
| 2, Uplands Way669 m away | 160 m² | 194 m² | +34 m² +21% | 2025 |
|---|
| 2, Richmond Gardens530 m away | 103 m² | 137 m² | +34 m² +33% | 2024 |
|---|
| 92, Highfield Lane536 m away | 117 m² | 151 m² | +34 m² +29% | 2022 |
|---|
| 48, Shaftesbury Avenue380 m away | 77 m² | 111 m² | +34 m² +44% | 2019 |
|---|
| 38, Orchards Way812 m away | 115 m² | 148 m² | +33 m² +29% | 2025 |
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| 344, Burgess Road892 m away | 123 m² | 156 m² | +33 m² +27% | 2023 |
|---|
| 15, Blenheim Gardens109 m away | 80 m² | 113 m² | +33 m² +41% | 2015 |
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| 57, Westridge Road984 m away | 81 m² | 114 m² | +33 m² +41% | 2011 |
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| 38, Crofton Close905 m away | 173 m² | 205 m² | +32 m² +18% | 2025 |
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| 11, Crofton Close905 m away | 173 m² | 205 m² | +32 m² +18% | 2022 |
|---|
| 258, Broadlands Road323 m away | 99 m² | 131 m² | +32 m² +32% | 2020 |
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| 11, Honeysuckle Road802 m away | 79 m² | 111 m² | +32 m² +41% | 2020 |
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| 155, Mayfield Road389 m away | 110 m² | 141 m² | +31 m² +28% | 2025 |
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| 11, Lilac Road800 m away | 81 m² | 112 m² | +31 m² +38% | 2025 |
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| 16, Honeysuckle Road791 m away | 129 m² | 160 m² | +31 m² +24% | 2023 |
|---|
| 124, Broadlands Road370 m away | 101 m² | 132 m² | +31 m² +31% | 2021 |
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| 21, University Road332 m away | 120 m² | 151 m² | +31 m² +26% | 2020 |
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| 10a, Harrison Road575 m away | 70 m² | 101 m² | +31 m² +44% | 2020 |
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| 15, Church Lane360 m away | 131 m² | 162 m² | +31 m² +24% | 2018 |
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| 35, Roselands Gardens558 m away | 100 m² | 131 m² | +31 m² +31% | 2018 |
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| 26, Glen Eyre Road976 m away | 122 m² | 153 m² | +31 m² +25% | 2016 |
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| 41, Arnold Road507 m away | 89 m² | 119 m² | +30 m² +34% | 2024 |
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| 76, Honeysuckle Road711 m away | 77 m² | 107 m² | +30 m² +39% | 2024 |
|---|
| 55, High Road920 m away | 84 m² | 114 m² | +30 m² +36% | 2023 |
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| 30, Kitchener Road287 m away | 83 m² | 113 m² | +30 m² +36% | 2022 |
|---|
| 20, Sherborne Road0 m away | 100 m² | 130 m² | +30 m² +30% | 2021 |
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| 38, Granby Grove179 m away | 92 m² | 122 m² | +30 m² +33% | 2021 |
|---|
| 75, Sirdar Road298 m away | 87 m² | 117 m² | +30 m² +34% | 2021 |
|---|
| 7, Grosvenor Close576 m away | 113 m² | 143 m² | +30 m² +27% | 2021 |
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| 39, Heatherdeane Road747 m away | 100 m² | 130 m² | +30 m² +30% | 2019 |
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| 29, Elmsleigh Gardens994 m away | 80 m² | 110 m² | +30 m² +38% | 2018 |
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| 52, Harefield Road668 m away | 88 m² | 117 m² | +29 m² +33% | 2021 |
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| 17, Woodcote Road556 m away | 88 m² | 117 m² | +29 m² +33% | 2019 |
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| 303, Burgess Road644 m away | 84 m² | 113 m² | +29 m² +35% | 2019 |
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| 69, Brookvale Road722 m away | 116 m² | 145 m² | +29 m² +25% | 2019 |
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| 4, Hartley Avenue177 m away | 84 m² | 113 m² | +29 m² +35% | 2013 |
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| 65, Brookvale Road722 m away | 134 m² | 162 m² | +28 m² +21% | 2025 |
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| 27, University Road332 m away | 150 m² | 178 m² | +28 m² +19% | 2023 |
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| 301, Woodmill Lane980 m away | 95 m² | 123 m² | +28 m² +29% | 2023 |
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| 33, Honeysuckle Road717 m away | 80 m² | 108 m² | +28 m² +35% | 2022 |
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| 72, Mead Crescent857 m away | 94 m² | 122 m² | +28 m² +30% | 2022 |
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| 65, Tennyson Road900 m away | 94 m² | 122 m² | +28 m² +30% | 2021 |
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| 39, Lobelia Road974 m away | 67 m² | 95 m² | +28 m² +42% | 2021 |
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| 21, Bealing Close523 m away | 90 m² | 118 m² | +28 m² +31% | 2019 |
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| 58, Harefield Road668 m away | 88 m² | 116 m² | +28 m² +32% | 2019 |
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| 75, Tennyson Road900 m away | 25 m² | 53 m² | +28 m² +112% | 2019 |
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| 25, Mayfield Road414 m away | 102 m² | 130 m² | +28 m² +27% | 2014 |
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| 37, Lilac Road800 m away | 81 m² | 109 m² | +28 m² +35% | 2012 |
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| 87, Sirdar Road298 m away | 100 m² | 127 m² | +27 m² +27% | 2020 |
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| 8, Richmond Gardens530 m away | 96 m² | 123 m² | +27 m² +28% | 2019 |
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| Flat 5, Highfields, 56, Richmond Gardens560 m away | 43 m² | 70 m² | +27 m² +63% | 2019 |
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| 301, Burgess Road644 m away | 86 m² | 113 m² | +27 m² +31% | 2019 |
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| 10, Oakhurst Road660 m away | 91 m² | 118 m² | +27 m² +30% | 2019 |
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| 96, Harefield Road668 m away | 97 m² | 124 m² | +27 m² +28% | 2019 |
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| 240, Portswood Road658 m away | 68 m² | 94 m² | +26 m² +38% | 2024 |
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| 17a, Shaftesbury Avenue506 m away | 103 m² | 129 m² | +26 m² +25% | 2022 |
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| 6, University Road292 m away | 113 m² | 139 m² | +26 m² +23% | 2021 |
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| 62, Violet Road951 m away | 83 m² | 109 m² | +26 m² +31% | 2020 |
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| 284, Broadlands Road531 m away | 83 m² | 109 m² | +26 m² +31% | 2019 |
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| 332, Burgess Road892 m away | 102 m² | 127 m² | +25 m² +25% | 2023 |
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| 12, Sherborne Road0 m away | 104 m² | 129 m² | +25 m² +24% | 2022 |
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| 1, Woodcote Road455 m away | 79 m² | 104 m² | +25 m² +32% | 2022 |
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| 46, Blenheim Gardens154 m away | 90 m² | 115 m² | +25 m² +28% | 2020 |
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| 30, Granby Grove179 m away | 80 m² | 105 m² | +25 m² +31% | 2019 |
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| 599, Portswood Road453 m away | 25 m² | 50 m² | +25 m² +100% | 2017 |
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| 13, Merton Road120 m away | 85 m² | 110 m² | +25 m² +29% | 2010 |
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| 127, Osborne Road North799 m away | 48 m² | 73 m² | +25 m² +52% | 2010 |
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| 112, Broadlands Road370 m away | 100 m² | 124 m² | +24 m² +24% | 2025 |
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| 1, Orchards Way605 m away | 92 m² | 116 m² | +24 m² +26% | 2025 |
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| 403, Burgess Road913 m away | 81 m² | 105 m² | +24 m² +30% | 2024 |
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| Flat 3, Cotswold Court, 39, Winn Road979 m away | 92 m² | 116 m² | +24 m² +26% | 2024 |
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| 47, Laburnum Road966 m away | 61 m² | 85 m² | +24 m² +39% | 2023 |
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| 7, Blenheim Gardens109 m away | 107 m² | 131 m² | +24 m² +22% | 2022 |
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| 7, Broadlands Road373 m away | 93 m² | 117 m² | +24 m² +26% | 2021 |
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| 34, Kitchener Road287 m away | 80 m² | 104 m² | +24 m² +30% | 2020 |
|---|
| 28, Granby Grove179 m away | 75 m² | 99 m² | +24 m² +32% | 2019 |
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| 59, Shaftesbury Avenue262 m away | 150 m² | 174 m² | +24 m² +16% | 2018 |
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| 33, High Road920 m away | 38 m² | 62 m² | +24 m² +63% | 2018 |
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| 70, Mayfield Road460 m away | 99 m² | 123 m² | +24 m² +24% | 2015 |
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| 17, Kitchener Road311 m away | 84 m² | 107 m² | +23 m² +27% | 2026 |
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| 43, Woodcote Road556 m away | 79 m² | 102 m² | +23 m² +29% | 2025 |
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| 19, Highcrown Street662 m away | 96 m² | 119 m² | +23 m² +24% | 2023 |
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| 14, Nile Road759 m away | 98 m² | 121 m² | +23 m² +23% | 2021 |
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| 8, Sherborne Road0 m away | 96 m² | 119 m² | +23 m² +24% | 2019 |
|---|
| 111, Mayfield Road389 m away | 80 m² | 103 m² | +23 m² +29% | 2019 |
|---|
| 102, Belmont Road748 m away | 124 m² | 147 m² | +23 m² +19% | 2018 |
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| 41, Ripstone Gardens171 m away | 134 m² | 157 m² | +23 m² +17% | 2014 |
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| 2, Hartley Avenue177 m away | 90 m² | 113 m² | +23 m² +26% | 2013 |
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| 167, Bluebell Road948 m away | 63 m² | 85 m² | +22 m² +35% | 2026 |
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| 57, Elmsleigh Gardens994 m away | 121 m² | 143 m² | +22 m² +18% | 2026 |
|---|
| 19, Bluebell Road841 m away | 92 m² | 114 m² | +22 m² +24% | 2022 |
|---|
| 13, Honeysuckle Road802 m away | 85 m² | 107 m² | +22 m² +26% | 2020 |
|---|
| 10, Holyrood Avenue275 m away | 116 m² | 138 m² | +22 m² +19% | 2019 |
|---|
| 26, Sirdar Road299 m away | 77 m² | 99 m² | +22 m² +29% | 2019 |
|---|
| Flat 14, Roxan Mews, 450, Portswood Road512 m away | 48 m² | 70 m² | +22 m² +46% | 2019 |
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| 87, Harefield Road618 m away | 87 m² | 109 m² | +22 m² +25% | 2019 |
|---|
| 97, Welbeck Avenue312 m away | 99 m² | 121 m² | +22 m² +22% | 2016 |
|---|
| 52, Honeysuckle Road711 m away | 91 m² | 113 m² | +22 m² +24% | 2015 |
|---|
| 5, Sherborne Road31 m away | 82 m² | 104 m² | +22 m² +27% | 2014 |
|---|
| 10, Sherborne Road0 m away | 85 m² | 107 m² | +22 m² +26% | 2010 |
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| 16, Begonia Road767 m away | 74 m² | 95 m² | +21 m² +28% | 2025 |
|---|
| 21, Lilac Road800 m away | 77 m² | 98 m² | +21 m² +27% | 2025 |
|---|
| 79, Broadlands Road373 m away | 81 m² | 102 m² | +21 m² +26% | 2023 |
|---|
| 15, Ripstone Gardens66 m away | 91 m² | 112 m² | +21 m² +23% | 2021 |
|---|
| 453, Portswood Road561 m away | 95 m² | 116 m² | +21 m² +22% | 2020 |
|---|
| 17, Sherborne Road31 m away | 85 m² | 106 m² | +21 m² +25% | 2019 |
|---|
| 26, Kitchener Road287 m away | 99 m² | 120 m² | +21 m² +21% | 2019 |
|---|
| Flat 24, Oakdene, Welbeck Avenue292 m away | 45 m² | 66 m² | +21 m² +47% | 2018 |
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| 7, Oakhurst Road660 m away | 124 m² | 145 m² | +21 m² +17% | 2014 |
|---|
| 405, Burgess Road913 m away | 79 m² | 100 m² | +21 m² +27% | 2014 |
|---|
| 18, Harefield Road668 m away | 85 m² | 106 m² | +21 m² +25% | 2012 |
|---|
| 122, Upper Shaftesbury Avenue98 m away | 75 m² | 95 m² | +20 m² +27% | 2026 |
|---|
| 8, Hilldown Road383 m away | 85 m² | 105 m² | +20 m² +24% | 2026 |
|---|
| 302, Burgess Road892 m away | 130 m² | 150 m² | +20 m² +15% | 2023 |
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