Finding extended homes…
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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 SE23 2NU
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 |
|---|---|---|---|---|
| 1, Radlet Avenue646 m away | 123 m² | 242 m² | +119 m² +97% | 2026 |
| 7b, Church Rise781 m away | 143 m² | 256 m² | +113 m² +79% | 2024 |
| 66, Sunderland Road545 m away | 100 m² | 209 m² | +109 m² +109% | 2026 |
| 76, London Road957 m away | 105 m² | 210 m² | +105 m² +100% | 2013 |
| 5, Hennel Close81 m away | 94 m² | 188 m² | +94 m² +100% | 2026 |
| 99, Dacres Road256 m away | 116 m² | 207 m² | +91 m² +78% | 2014 |
| 32b, Sunderland Road842 m away | 118 m² | 205 m² | +87 m² +74% | 2015 |
| 17, Gaynesford Road552 m away | 108 m² | 191 m² | +83 m² +77% | 2020 |
| 10, Shaws Cottages632 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.
| 57 m² |
| 139 m² |
| +82 m² +144% |
| 2019 |
| 41, Carlton Terrace402 m away | 128 m² | 208 m² | +80 m² +63% | 2019 |
|---|
| 13, Kingsthorpe Road554 m away | 61 m² | 139 m² | +78 m² +128% | 2020 |
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| 26, Panmure Road841 m away | 71 m² | 146 m² | +75 m² +106% | 2017 |
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| Arthive Studios Unit 3, 29, Hindsleys Place720 m away | 59 m² | 134 m² | +75 m² +127% | 2015 |
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| 28, Devonshire Road908 m away | 85 m² | 160 m² | +75 m² +88% | 2015 |
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| 30, Tannsfeld Road850 m away | 106 m² | 180 m² | +74 m² +70% | 2026 |
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| 9, Burghill Road655 m away | 161 m² | 231 m² | +70 m² +43% | 2022 |
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| 50, Peak Hill451 m away | 69 m² | 139 m² | +70 m² +101% | 2020 |
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| 26, Peak Hill451 m away | 59 m² | 128 m² | +69 m² +117% | 2023 |
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| 7, Venner Road787 m away | 67 m² | 134 m² | +67 m² +100% | 2024 |
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| 43, Homecroft Road849 m away | 66 m² | 133 m² | +67 m² +102% | 2024 |
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| 35, Siddons Road695 m away | 127 m² | 193 m² | +66 m² +52% | 2025 |
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| 47, Stanstead Road926 m away | 95 m² | 161 m² | +66 m² +69% | 2020 |
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| 67, Sunderland Road937 m away | 219 m² | 284 m² | +65 m² +30% | 2023 |
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| 72, Cranston Road879 m away | 95 m² | 160 m² | +65 m² +68% | 2022 |
|---|
| 2a, Elderton Road923 m away | 58 m² | 123 m² | +65 m² +112% | 2016 |
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| 13, Venner Road787 m away | 45 m² | 109 m² | +64 m² +142% | 2026 |
|---|
| 35, Earlsthorpe Road686 m away | 203 m² | 267 m² | +64 m² +32% | 2020 |
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| 129, Cranston Road919 m away | 95 m² | 159 m² | +64 m² +67% | 2016 |
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| 15, Tredown Road969 m away | 128 m² | 191 m² | +63 m² +49% | 2014 |
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| 2, Rosamond Street837 m away | 79 m² | 140 m² | +61 m² +77% | 2024 |
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| 21, Aylward Road560 m away | 144 m² | 203 m² | +59 m² +41% | 2026 |
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| 14, Tannsfeld Road850 m away | 120 m² | 179 m² | +59 m² +49% | 2020 |
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| 45, Kirkdale704 m away | 90 m² | 147 m² | +57 m² +63% | 2024 |
|---|
| 99, Longton Grove923 m away | 51 m² | 108 m² | +57 m² +112% | 2013 |
|---|
| 1, St Pauls Conversion, Taymount Rise901 m away | 139 m² | 195 m² | +56 m² +40% | 2016 |
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| Flat 2, 14, Waldram Park Road901 m away | 115 m² | 170 m² | +55 m² +48% | 2021 |
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| 5, Aylward Road560 m away | 140 m² | 194 m² | +54 m² +39% | 2025 |
|---|
| 118, Woolstone Road779 m away | 101 m² | 154 m² | +53 m² +52% | 2017 |
|---|
| 7, Whittell Gardens289 m away | 86 m² | 139 m² | +53 m² +62% | 2014 |
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| 40, Whittell Gardens289 m away | 79 m² | 131 m² | +52 m² +66% | 2017 |
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| 148, Cranston Road879 m away | 90 m² | 142 m² | +52 m² +58% | 2017 |
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| 4, Church View, Sunderland Road677 m away | 106 m² | 158 m² | +52 m² +49% | 2015 |
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| 69, Homecroft Road849 m away | 106 m² | 158 m² | +52 m² +49% | 2014 |
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| 42, Thorpewood Avenue753 m away | 84 m² | 135 m² | +51 m² +61% | 2026 |
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| 40, Hall Drive846 m away | 186 m² | 237 m² | +51 m² +27% | 2017 |
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| 229, Sydenham Road942 m away | 88 m² | 139 m² | +51 m² +58% | 2016 |
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| 85, Colfe Road944 m away | 89 m² | 140 m² | +51 m² +57% | 2014 |
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| 23, Aylward Road560 m away | 178 m² | 228 m² | +50 m² +28% | 2026 |
|---|
| 32, Trilby Road774 m away | 77 m² | 127 m² | +50 m² +65% | 2023 |
|---|
| 18, Queensthorpe Road544 m away | 89 m² | 139 m² | +50 m² +56% | 2022 |
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| 61, Homecroft Road849 m away | 105 m² | 155 m² | +50 m² +48% | 2022 |
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| 25, Queenswood Road600 m away | 91 m² | 138 m² | +47 m² +52% | 2022 |
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| 8, Roundhay Close350 m away | 79 m² | 126 m² | +47 m² +59% | 2021 |
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| 20, Whittell Gardens289 m away | 86 m² | 133 m² | +47 m² +55% | 2019 |
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| 25, Collingtree Road483 m away | 84 m² | 130 m² | +46 m² +55% | 2025 |
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| 36a, Panmure Road841 m away | 84 m² | 130 m² | +46 m² +55% | 2023 |
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| 15, Dukesthorpe Road610 m away | 109 m² | 155 m² | +46 m² +42% | 2022 |
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| 23, Allenby Road794 m away | 119 m² | 165 m² | +46 m² +39% | 2022 |
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| 23, Fransfield Grove673 m away | 38 m² | 84 m² | +46 m² +121% | 2010 |
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| 4, Tannsfeld Road850 m away | 132 m² | 177 m² | +45 m² +34% | 2021 |
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| 21, Cibber Road886 m away | 51 m² | 96 m² | +45 m² +88% | 2016 |
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| 26, Loxton Road984 m away | 93 m² | 138 m² | +45 m² +48% | 2015 |
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| 5, Canal Walk809 m away | 78 m² | 123 m² | +45 m² +58% | 2014 |
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| 109, Sydenham Park Road193 m away | 85 m² | 129 m² | +44 m² +52% | 2024 |
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| 66, De Frene Road728 m away | 80 m² | 124 m² | +44 m² +55% | 2023 |
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| 163, Cranston Road919 m away | 95 m² | 138 m² | +43 m² +45% | 2025 |
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| 26, Queensthorpe Road544 m away | 204 m² | 247 m² | +43 m² +21% | 2020 |
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| 37, Cheseman Street578 m away | 146 m² | 189 m² | +43 m² +29% | 2020 |
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| 26, Trilby Road774 m away | 76 m² | 119 m² | +43 m² +57% | 2019 |
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| 13c, Havelock Walk848 m away | 62 m² | 104 m² | +42 m² +68% | 2020 |
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| 53, Girton Road898 m away | 89 m² | 130 m² | +41 m² +46% | 2024 |
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| 157, Sydenham Park Road193 m away | 110 m² | 151 m² | +41 m² +37% | 2023 |
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| 18, Davids Road922 m away | 49 m² | 90 m² | +41 m² +84% | 2020 |
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| 52, Como Road732 m away | 106 m² | 147 m² | +41 m² +39% | 2019 |
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| 14, Peak Hill451 m away | 80 m² | 121 m² | +41 m² +51% | 2015 |
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| 14a, Lawrie Park Avenue952 m away | 45 m² | 86 m² | +41 m² +91% | 2015 |
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| 30, Thorpewood Avenue753 m away | 168 m² | 209 m² | +41 m² +24% | 2012 |
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| A home on Panmure Road850 m away | 215 m² | 255 m² | +40 m² +19% | 2026 |
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| 50, Rockbourne Road997 m away | 120 m² | 160 m² | +40 m² +33% | 2026 |
|---|
| Flat 26, Valentine Court, Perry Vale480 m away | 44 m² | 84 m² | +40 m² +91% | 2022 |
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| 137, Newlands Park926 m away | 111 m² | 151 m² | +40 m² +36% | 2015 |
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| 29, Princethorpe Road580 m away | 121 m² | 161 m² | +40 m² +33% | 2014 |
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| Flat 3, 32, Sydenham Park392 m away | 63 m² | 102 m² | +39 m² +62% | 2025 |
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| 26, Lawrie Park Avenue952 m away | 217 m² | 256 m² | +39 m² +18% | 2022 |
|---|
| 73, Sunderland Road937 m away | 238 m² | 277 m² | +39 m² +16% | 2021 |
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| 23c, Church Rise781 m away | 112 m² | 151 m² | +39 m² +35% | 2015 |
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| 287c, Sydenham Road987 m away | 45 m² | 83 m² | +38 m² +84% | 2026 |
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| 7, Hassocks Close723 m away | 49 m² | 87 m² | +38 m² +78% | 2025 |
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| 12, Trilby Road774 m away | 85 m² | 123 m² | +38 m² +45% | 2023 |
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| 29, Perry Vale763 m away | 52 m² | 90 m² | +38 m² +73% | 2016 |
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| 191e, Perry Vale668 m away | 55 m² | 92 m² | +37 m² +67% | 2026 |
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| 58, Trilby Road774 m away | 96 m² | 133 m² | +37 m² +39% | 2025 |
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| 4, Ticehurst Road968 m away | 89 m² | 126 m² | +37 m² +42% | 2025 |
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| 78, Como Road732 m away | 85 m² | 122 m² | +37 m² +44% | 2022 |
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| Flat A, 35, Waldram Park Road959 m away | 60 m² | 97 m² | +37 m² +62% | 2022 |
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| 63, Queenswood Road600 m away | 142 m² | 179 m² | +37 m² +26% | 2019 |
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| 22, Fransfield Grove673 m away | 43 m² | 80 m² | +37 m² +86% | 2011 |
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| 1a, Perry Rise712 m away | 85 m² | 121 m² | +36 m² +42% | 2024 |
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| 49, Thorpewood Avenue558 m away | 133 m² | 169 m² | +36 m² +27% | 2023 |
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| 62, Woolstone Road996 m away | 99 m² | 135 m² | +36 m² +36% | 2023 |
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| 3, The Peak274 m away | 86 m² | 122 m² | +36 m² +42% | 2022 |
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| 4, Julian Tayler Path929 m away | 89 m² | 125 m² | +36 m² +40% | 2019 |
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| 18, Rosamond Street837 m away | 81 m² | 117 m² | +36 m² +44% | 2018 |
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| 32, De Frene Road564 m away | 93 m² | 129 m² | +36 m² +39% | 2017 |
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| 29, Sunderland Road937 m away | 47 m² | 83 m² | +36 m² +77% | 2016 |
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| Flat 8, Hosford House, 48, Devonshire Road991 m away | 61 m² | 97 m² | +36 m² +59% | 2012 |
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| 12, Mount Ash Road787 m away | 79 m² | 115 m² | +36 m² +46% | 2010 |
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| Flat 5, 8, Wells Park Road606 m away | 26 m² | 61 m² | +35 m² +135% | 2026 |
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| Flat 1, Sycamore Court, 7 - 9, Silverdale615 m away | 50 m² | 85 m² | +35 m² +70% | 2026 |
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| 71b, Mayow Road515 m away | 96 m² | 131 m² | +35 m² +36% | 2024 |
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| 5a, Bishopsthorpe Road432 m away | 110 m² | 145 m² | +35 m² +32% | 2023 |
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| 210, Perry Rise903 m away | 88 m² | 123 m² | +35 m² +40% | 2017 |
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| 279, Sydenham Road954 m away | 46 m² | 81 m² | +35 m² +76% | 2016 |
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| 64, Siddons Road698 m away | 116 m² | 151 m² | +35 m² +30% | 2015 |
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| 7, Homecroft Road849 m away | 128 m² | 163 m² | +35 m² +27% | 2015 |
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| 55, Longton Grove923 m away | 109 m² | 144 m² | +35 m² +32% | 2013 |
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| 75, Longfield Crescent261 m away | 73 m² | 108 m² | +35 m² +48% | 2011 |
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| 46, Ticehurst Road968 m away | 110 m² | 144 m² | +34 m² +31% | 2026 |
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| 57c, Peak Hill394 m away | 73 m² | 107 m² | +34 m² +47% | 2025 |
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| 9, Derby Hill Crescent591 m away | 106 m² | 140 m² | +34 m² +32% | 2025 |
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| 31, Girton Road898 m away | 88 m² | 122 m² | +34 m² +39% | 2024 |
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| Flat 4, 34a, Sydenham Hill957 m away | 113 m² | 147 m² | +34 m² +30% | 2022 |
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| 7, Girton Road898 m away | 80 m² | 114 m² | +34 m² +43% | 2021 |
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| 94, Kemble Road992 m away | 70 m² | 104 m² | +34 m² +49% | 2020 |
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| 53b, Dartmouth Road604 m away | 86 m² | 120 m² | +34 m² +40% | 2019 |
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| 202, Adamsrill Road903 m away | 74 m² | 108 m² | +34 m² +46% | 2019 |
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| 4, Ardley Close943 m away | 84 m² | 118 m² | +34 m² +40% | 2019 |
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| 98, Kemble Road992 m away | 69 m² | 103 m² | +34 m² +49% | 2019 |
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| 28, Beaulieu Avenue807 m away | 141 m² | 175 m² | +34 m² +24% | 2014 |
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| 45, Mayow Road447 m away | 105 m² | 139 m² | +34 m² +32% | 2013 |
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| 24, Derby Hill Crescent591 m away | 102 m² | 135 m² | +33 m² +32% | 2023 |
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| 100, Sydenham Park Road273 m away | 95 m² | 128 m² | +33 m² +35% | 2022 |
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| 35, Acorn Way326 m away | 74 m² | 107 m² | +33 m² +45% | 2021 |
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| 26a, Como Road868 m away | 76 m² | 109 m² | +33 m² +43% | 2021 |
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| 31, Dacres Road220 m away | 72 m² | 105 m² | +33 m² +46% | 2019 |
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| Flat 13, Fitzwilliam Heights, 21, Taymount Rise796 m away | 84 m² | 117 m² | +33 m² +39% | 2014 |
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| 8, The Peak274 m away | 102 m² | 134 m² | +32 m² +31% | 2026 |
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| 33, Girton Road898 m away | 92 m² | 124 m² | +32 m² +35% | 2024 |
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| 4, Waldram Park Road901 m away | 40 m² | 72 m² | +32 m² +80% | 2022 |
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| 63, Highclere Street876 m away | 74 m² | 106 m² | +32 m² +43% | 2020 |
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| 5, Sandown Court566 m away | 58 m² | 90 m² | +32 m² +55% | 2019 |
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| 11, Ardley Close943 m away | 86 m² | 118 m² | +32 m² +37% | 2019 |
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| 53, Chelsfield Gardens130 m away | 80 m² | 112 m² | +32 m² +40% | 2014 |
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| 20, Trilby Road774 m away | 81 m² | 113 m² | +32 m² +40% | 2014 |
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| 36, Kirkdale755 m away | 177 m² | 209 m² | +32 m² +18% | 2009 |
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| 32, Hyndewood101 m away | 103 m² | 134 m² | +31 m² +30% | 2024 |
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| 13a, Cheseman Street578 m away | 49 m² | 80 m² | +31 m² +63% | 2021 |
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| 42, Trilby Road774 m away | 66 m² | 97 m² | +31 m² +47% | 2021 |
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| 76, Cranston Road879 m away | 116 m² | 147 m² | +31 m² +27% | 2015 |
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| 144, Woolstone Road779 m away | 99 m² | 130 m² | +31 m² +31% | 2013 |
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| Flat 14, Fitzwilliam Heights, 21, Taymount Rise796 m away | 86 m² | 116 m² | +30 m² +35% | 2025 |
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| 53, Siddons Road695 m away | 112 m² | 142 m² | +30 m² +27% | 2023 |
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| 36, Vestris Road798 m away | 69 m² | 99 m² | +30 m² +43% | 2023 |
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| 31, Adamsrill Road669 m away | 74 m² | 104 m² | +30 m² +41% | 2021 |
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| 59, Peak Hill394 m away | 161 m² | 191 m² | +30 m² +19% | 2014 |
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| 43, Hall Drive856 m away | 132 m² | 162 m² | +30 m² +23% | 2014 |
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| 84, Colfe Road929 m away | 96 m² | 126 m² | +30 m² +31% | 2014 |
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| Flat 4, 111, Dartmouth Road388 m away | 42 m² | 72 m² | +30 m² +71% | 2013 |
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| 40a, Highclere Street860 m away | 48 m² | 77 m² | +29 m² +60% | 2026 |
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| 49, Highclere Street876 m away | 70 m² | 99 m² | +29 m² +41% | 2025 |
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| 23b, Church Rise781 m away | 123 m² | 152 m² | +29 m² +24% | 2022 |
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| 111, Longton Grove923 m away | 93 m² | 122 m² | +29 m² +31% | 2022 |
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| 45, Thorpewood Avenue558 m away | 110 m² | 139 m² | +29 m² +26% | 2019 |
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| 9, Highclere Street876 m away | 78 m² | 107 m² | +29 m² +37% | 2016 |
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| 232, Perry Rise903 m away | 81 m² | 110 m² | +29 m² +36% | 2016 |
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| 51, Beaulieu Avenue959 m away | 131 m² | 160 m² | +29 m² +22% | 2014 |
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| 135, Hazel Grove692 m away | 66 m² | 95 m² | +29 m² +44% | 2012 |
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| 87, Sydenham Road711 m away | 57 m² | 86 m² | +29 m² +51% | 2010 |
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| 81, Queenswood Road600 m away | 127 m² | 155 m² | +28 m² +22% | 2026 |
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| Flat 11, York House, Lawrie Park Road898 m away | 48 m² | 76 m² | +28 m² +58% | 2024 |
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| Flat 9, Wenlock House, 41, Stanstead Road926 m away | 55 m² | 83 m² | +28 m² +51% | 2024 |
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| 43, Panmure Road850 m away | 133 m² | 161 m² | +28 m² +21% | 2022 |
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| 35a, Tredown Road969 m away | 37 m² | 65 m² | +28 m² +76% | 2021 |
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| 28, Loxton Road984 m away | 88 m² | 116 m² | +28 m² +32% | 2019 |
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| 6, St Pauls Conversion, Taymount Rise901 m away | 81 m² | 109 m² | +28 m² +35% | 2012 |
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| 23, Venner Road787 m away | 57 m² | 85 m² | +28 m² +49% | 2010 |
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| 105, De Frene Road689 m away | 125 m² | 152 m² | +27 m² +22% | 2026 |
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| 32, Derby Hill626 m away | 103 m² | 130 m² | +27 m² +26% | 2025 |
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| 23, Shipman Road763 m away | 103 m² | 130 m² | +27 m² +26% | 2025 |
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| Flat 10, 2 - 4, Trewsbury Road915 m away | 118 m² | 145 m² | +27 m² +23% | 2025 |
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| 69, Larkbere Road890 m away | 83 m² | 110 m² | +27 m² +33% | 2021 |
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| 20, Loxton Road984 m away | 101 m² | 128 m² | +27 m² +27% | 2021 |
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| 36, Rockbourne Road997 m away | 121 m² | 148 m² | +27 m² +22% | 2017 |
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| 88, Kemble Road992 m away | 76 m² | 103 m² | +27 m² +36% | 2011 |
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| 61, Queenswood Road600 m away | 123 m² | 149 m² | +26 m² +21% | 2025 |
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| 50, Priestfield Road902 m away | 86 m² | 112 m² | +26 m² +30% | 2022 |
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| 8, Mayow Road380 m away | 69 m² | 95 m² | +26 m² +38% | 2021 |
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| 101a, Como Road777 m away | 52 m² | 78 m² | +26 m² +50% | 2020 |
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| 10, Whittell Gardens289 m away | 90 m² | 116 m² | +26 m² +29% | 2016 |
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| 126, Woolstone Road779 m away | 79 m² | 105 m² | +26 m² +33% | 2010 |
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| 48, Derby Hill626 m away | 94 m² | 119 m² | +25 m² +27% | 2025 |
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| 45b, Sydenham Road672 m away | 70 m² | 95 m² | +25 m² +36% | 2025 |
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| Flat 1, 39, Sunderland Road937 m away | 49 m² | 74 m² | +25 m² +51% | 2025 |
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| 61, Trilby Road781 m away | 66 m² | 91 m² | +25 m² +38% | 2021 |
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| 32, Dacres Road278 m away | 55 m² | 80 m² | +25 m² +45% | 2020 |
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| 161, Lawrie Park Gardens985 m away | 84 m² | 109 m² | +25 m² +30% | 2020 |
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| 11, Charlecote Grove685 m away | 85 m² | 110 m² | +25 m² +29% | 2019 |
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| 3, Dukesthorpe Road610 m away | 122 m² | 147 m² | +25 m² +20% | 2018 |
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| 2, Fransfield Grove673 m away | 130 m² | 155 m² | +25 m² +19% | 2018 |
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| 13, Whittell Gardens289 m away | 79 m² | 104 m² | +25 m² +32% | 2017 |
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