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 N21 1DY
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 |
|---|---|---|---|---|
| 31, Eversley Crescent645 m away | 261 m² | 574 m² | +313 m² +120% | 2022 |
| 36, Eversley Crescent564 m away | 167 m² | 413 m² | +246 m² +147% | 2020 |
| 124, Old Park Ridings737 m away | 274 m² | 486 m² | +212 m² +77% | 2022 |
| 6, Eversley Mount695 m away | 190 m² | 386 m² | +196 m² +103% | 2022 |
| 77, Old Park Avenue881 m away | 167 m² | 340 m² | +173 m² +104% | 2024 |
| 164, Green Dragon Lane371 m away | 197 m² | 367 m² | +170 m² +86% | 2016 |
| 35, Church Hill988 m away | 125 m² | 260 m² | +135 m² +108% | 2018 |
| 25, Links Side935 m away | 94 m² | 223 m² | +129 m² +137% | 2026 |
| 18, Bazile Road268 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.
| 203 m² |
| 320 m² |
| +117 m² +58% |
| 2016 |
| 76, Hoodcote Gardens859 m away | 100 m² | 213 m² | +113 m² +113% | 2026 |
|---|
| 58, Eversley Park Road715 m away | 151 m² | 263 m² | +112 m² +74% | 2025 |
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| 19, Old Park Road South628 m away | 133 m² | 244 m² | +111 m² +83% | 2026 |
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| 7, Cranleigh Gardens85 m away | 99 m² | 209 m² | +110 m² +111% | 2018 |
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| 32, Old Park Ridings656 m away | 140 m² | 249 m² | +109 m² +78% | 2017 |
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| 26, Ridings Avenue689 m away | 74 m² | 182 m² | +108 m² +146% | 2017 |
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| 21, Houndsden Road793 m away | 114 m² | 219 m² | +105 m² +92% | 2024 |
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| 55, The Chine535 m away | 133 m² | 238 m² | +105 m² +79% | 2023 |
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| 92, The Chine589 m away | 280 m² | 385 m² | +105 m² +38% | 2023 |
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| 54, Park Drive896 m away | 181 m² | 285 m² | +104 m² +57% | 2026 |
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| 10, Chaseville Park Road756 m away | 105 m² | 209 m² | +104 m² +99% | 2019 |
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| 29, Stone Hall Road867 m away | 96 m² | 196 m² | +100 m² +104% | 2022 |
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| 77, Park Drive876 m away | 109 m² | 200 m² | +91 m² +83% | 2023 |
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| 74, Langham Gardens74 m away | 143 m² | 234 m² | +91 m² +64% | 2018 |
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| 15, Chaseville Park Road624 m away | 112 m² | 201 m² | +89 m² +79% | 2021 |
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| 25, Waverley Road884 m away | 100 m² | 189 m² | +89 m² +89% | 2020 |
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| 53, Old Park Ridings613 m away | 112 m² | 197 m² | +85 m² +76% | 2024 |
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| 150, Green Dragon Lane371 m away | 120 m² | 201 m² | +81 m² +68% | 2023 |
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| 105, Wades Hill736 m away | 111 m² | 191 m² | +80 m² +72% | 2020 |
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| 39, Hoodcote Gardens876 m away | 142 m² | 221 m² | +79 m² +56% | 2024 |
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| 32, Houndsden Road818 m away | 110 m² | 186 m² | +76 m² +69% | 2026 |
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| 8, Stone Hall Road874 m away | 133 m² | 209 m² | +76 m² +57% | 2020 |
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| 12, Bazile Road268 m away | 183 m² | 258 m² | +75 m² +41% | 2022 |
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| 7, Landra Gardens418 m away | 111 m² | 184 m² | +73 m² +66% | 2020 |
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| 6, Glenbrook North886 m away | 93 m² | 165 m² | +72 m² +77% | 2012 |
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| 35, The Spinney871 m away | 109 m² | 180 m² | +71 m² +65% | 2026 |
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| 18, Hillcrest862 m away | 115 m² | 186 m² | +71 m² +62% | 2011 |
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| 54, Broadfields Avenue732 m away | 102 m² | 171 m² | +69 m² +68% | 2021 |
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| 10, Eversley Crescent564 m away | 232 m² | 296 m² | +64 m² +28% | 2023 |
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| 21, Eversley Crescent645 m away | 235 m² | 297 m² | +62 m² +26% | 2024 |
|---|
| 29, Old Park Ridings744 m away | 151 m² | 212 m² | +61 m² +40% | 2021 |
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| 11, Onslow Gardens0 m away | 103 m² | 163 m² | +60 m² +58% | 2024 |
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| 42, Lindal Crescent938 m away | 100 m² | 159 m² | +59 m² +59% | 2019 |
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| 9, The Glen694 m away | 108 m² | 166 m² | +58 m² +54% | 2018 |
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| 46, Green Dragon Lane947 m away | 135 m² | 192 m² | +57 m² +42% | 2021 |
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| 132, Wades Hill513 m away | 125 m² | 181 m² | +56 m² +45% | 2016 |
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| 47, Oakwood Crescent854 m away | 97 m² | 152 m² | +55 m² +57% | 2026 |
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| 133, Green Dragon Lane411 m away | 223 m² | 278 m² | +55 m² +25% | 2025 |
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| 15, The Birches963 m away | 130 m² | 185 m² | +55 m² +42% | 2025 |
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| 31, Landra Gardens418 m away | 102 m² | 157 m² | +55 m² +54% | 2023 |
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| 16, Maxim Road279 m away | 118 m² | 171 m² | +53 m² +45% | 2026 |
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| 62, Maplin Close622 m away | 100 m² | 153 m² | +53 m² +53% | 2025 |
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| 37, Green Moor Link889 m away | 107 m² | 160 m² | +53 m² +50% | 2018 |
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| 18, Roundhill Drive738 m away | 103 m² | 156 m² | +53 m² +51% | 2014 |
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| 34, Langham Gardens74 m away | 123 m² | 176 m² | +53 m² +43% | 2013 |
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| 69, Old Park Ridings659 m away | 240 m² | 292 m² | +52 m² +22% | 2024 |
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| 69, Eversley Park Road557 m away | 116 m² | 167 m² | +51 m² +44% | 2026 |
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| 24, Roundhill Drive738 m away | 82 m² | 133 m² | +51 m² +62% | 2026 |
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| 4, Silverdale959 m away | 79 m² | 129 m² | +50 m² +63% | 2022 |
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| Flat 11, Adam Lodge, 2, Buchanan Close810 m away | 49 m² | 99 m² | +50 m² +102% | 2019 |
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| 22, Waverley Road994 m away | 94 m² | 141 m² | +47 m² +50% | 2014 |
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| 1c, Nestor Avenue570 m away | 98 m² | 143 m² | +45 m² +46% | 2025 |
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| 11, Glenbrook South813 m away | 86 m² | 131 m² | +45 m² +52% | 2018 |
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| 1, Hoodcote Gardens876 m away | 124 m² | 168 m² | +44 m² +35% | 2025 |
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| 19, Green Moor Link889 m away | 122 m² | 166 m² | +44 m² +36% | 2025 |
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| 89, Old Park Avenue881 m away | 139 m² | 183 m² | +44 m² +32% | 2022 |
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| 62, The Chine569 m away | 159 m² | 203 m² | +44 m² +28% | 2019 |
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| 59, Green Dragon Lane925 m away | 98 m² | 141 m² | +43 m² +44% | 2021 |
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| 3, Green Moor Link889 m away | 138 m² | 180 m² | +42 m² +30% | 2021 |
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| 67, Vera Avenue187 m away | 198 m² | 239 m² | +41 m² +21% | 2021 |
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| 4, Old Park Ridings788 m away | 244 m² | 283 m² | +39 m² +16% | 2025 |
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| 12, Silverdale959 m away | 80 m² | 119 m² | +39 m² +49% | 2024 |
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| 62, Hadley Way592 m away | 96 m² | 134 m² | +38 m² +40% | 2024 |
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| 18, Rushey Hill700 m away | 79 m² | 117 m² | +38 m² +48% | 2014 |
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| 127, Worlds End Lane716 m away | 81 m² | 118 m² | +37 m² +46% | 2024 |
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| 15, The Grangeway656 m away | 180 m² | 217 m² | +37 m² +21% | 2020 |
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| 25, Onslow Gardens0 m away | 113 m² | 149 m² | +36 m² +32% | 2026 |
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| Flat 8, Penrose House, 16, Newsholme Drive661 m away | 46 m² | 82 m² | +36 m² +78% | 2023 |
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| 56, Green Moor Link936 m away | 202 m² | 238 m² | +36 m² +18% | 2020 |
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| 17, Old Park Grove714 m away | 124 m² | 160 m² | +36 m² +29% | 2019 |
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| 31, Old Park Ridings744 m away | 171 m² | 206 m² | +35 m² +20% | 2026 |
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| 2, Cranleigh Gardens129 m away | 163 m² | 198 m² | +35 m² +21% | 2021 |
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| 18, Lindal Crescent938 m away | 94 m² | 129 m² | +35 m² +37% | 2020 |
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| 33, Cheyne Walk301 m away | 97 m² | 132 m² | +35 m² +36% | 2018 |
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| 41, Lindal Crescent915 m away | 122 m² | 156 m² | +34 m² +28% | 2026 |
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| 6, The Glen694 m away | 101 m² | 135 m² | +34 m² +34% | 2017 |
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| Flat 22, Penrose House, 16, Newsholme Drive661 m away | 58 m² | 91 m² | +33 m² +57% | 2022 |
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| 15, Glenbrook South813 m away | 127 m² | 159 m² | +32 m² +25% | 2023 |
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| 2a, Cadogan Gardens345 m away | 119 m² | 150 m² | +31 m² +26% | 2026 |
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| Flat B, 16, Eversley Park Road875 m away | 68 m² | 99 m² | +31 m² +46% | 2024 |
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| 1a, Links Side864 m away | 56 m² | 87 m² | +31 m² +55% | 2021 |
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| 26, Hoodcote Gardens859 m away | 145 m² | 175 m² | +30 m² +21% | 2025 |
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| 6, Buchanan Close810 m away | 48 m² | 78 m² | +30 m² +63% | 2022 |
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| 15, Links Side864 m away | 33 m² | 63 m² | +30 m² +91% | 2022 |
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| 47, Lindal Crescent915 m away | 72 m² | 101 m² | +29 m² +40% | 2019 |
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| 42, Anderson Close699 m away | 39 m² | 68 m² | +29 m² +74% | 2017 |
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| 73, The Chine535 m away | 97 m² | 126 m² | +29 m² +30% | 2016 |
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| 265, Lonsdale Drive758 m away | 83 m² | 112 m² | +29 m² +35% | 2015 |
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| Flat 12, Collingridge House, 5, Old Park Road880 m away | 70 m² | 98 m² | +28 m² +40% | 2021 |
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| 31, Hanbury Drive585 m away | 28 m² | 56 m² | +28 m² +100% | 2017 |
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| 21, Rushey Hill700 m away | 85 m² | 112 m² | +27 m² +32% | 2014 |
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| 305, Lonsdale Drive758 m away | 83 m² | 109 m² | +26 m² +31% | 2023 |
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| 69, Grange Park Avenue915 m away | 126 m² | 152 m² | +26 m² +21% | 2022 |
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| 64, Hadley Way592 m away | 134 m² | 159 m² | +25 m² +19% | 2020 |
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| 5, Laurel Drive957 m away | 131 m² | 156 m² | +25 m² +19% | 2014 |
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| 107, Wades Hill736 m away | 149 m² | 173 m² | +24 m² +16% | 2025 |
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| Flat 15, Penrose House, 16, Newsholme Drive661 m away | 67 m² | 91 m² | +24 m² +36% | 2024 |
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| 9, Broadfields Avenue912 m away | 125 m² | 149 m² | +24 m² +19% | 2021 |
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| 9, Onslow Gardens0 m away | 130 m² | 154 m² | +24 m² +18% | 2020 |
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| 15, Vermont Close873 m away | 53 m² | 77 m² | +24 m² +45% | 2020 |
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| 24, Broadfields Avenue895 m away | 133 m² | 157 m² | +24 m² +18% | 2018 |
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| 6, Rushey Hill700 m away | 84 m² | 108 m² | +24 m² +29% | 2014 |
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| 17a, Links Side864 m away | 40 m² | 63 m² | +23 m² +57% | 2022 |
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| Flat 15, Avon House, 1, Sydenham Avenue636 m away | 54 m² | 77 m² | +23 m² +43% | 2012 |
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| 57, Links Side991 m away | 77 m² | 99 m² | +22 m² +29% | 2026 |
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| 68, Park Drive896 m away | 90 m² | 112 m² | +22 m² +24% | 2024 |
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| Flat 1, Aspen House, 1, Hanbury Drive585 m away | 44 m² | 66 m² | +22 m² +50% | 2020 |
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| Flat 3, Belvedere Court, 1, Paulin Drive955 m away | 69 m² | 91 m² | +22 m² +32% | 2012 |
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| 27, Chaseville Park Road624 m away | 140 m² | 161 m² | +21 m² +15% | 2025 |
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| 96, Green Dragon Lane790 m away | 70 m² | 91 m² | +21 m² +30% | 2017 |
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| 7, The Spinney871 m away | 120 m² | 140 m² | +20 m² +17% | 2023 |
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| Flat 3, Aspen House, 1, Hanbury Drive585 m away | 43 m² | 63 m² | +20 m² +47% | 2022 |
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| 119, Pennington Drive806 m away | 59 m² | 79 m² | +20 m² +34% | 2021 |
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| 65a, The Chine535 m away | 82 m² | 102 m² | +20 m² +24% | 2020 |
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| Flat 1, Avon House, 1, Sydenham Avenue636 m away | 35 m² | 55 m² | +20 m² +57% | 2020 |
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| 17, Broadfields Avenue912 m away | 124 m² | 144 m² | +20 m² +16% | 2020 |
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| 51, Blackwell Close947 m away | 45 m² | 65 m² | +20 m² +44% | 2020 |
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| 27, Old Park Road South628 m away | 124 m² | 144 m² | +20 m² +16% | 2014 |
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| Flat 10, Carrington Court, 104, Green Dragon Lane744 m away | 117 m² | 136 m² | +19 m² +16% | 2024 |
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| 231, Gladbeck Way807 m away | 26 m² | 45 m² | +19 m² +73% | 2019 |
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| 16, Hadley Way592 m away | 101 m² | 120 m² | +19 m² +19% | 2011 |
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| 21, Millers Green Close926 m away | 28 m² | 46 m² | +18 m² +64% | 2024 |
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| Flat 5, Pitcairne Court, 5, Donovan Place525 m away | 68 m² | 86 m² | +18 m² +26% | 2014 |
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| Flat 1, Collingridge House, 5, Old Park Road880 m away | 89 m² | 106 m² | +17 m² +19% | 2021 |
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| 8, Sydenham Avenue636 m away | 79 m² | 96 m² | +17 m² +22% | 2020 |
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| 132, Gladbeck Way869 m away | 86 m² | 102 m² | +16 m² +19% | 2018 |
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| 14, Rushey Hill700 m away | 82 m² | 98 m² | +16 m² +20% | 2013 |
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| 141, Gladbeck Way869 m away | 43 m² | 58 m² | +15 m² +35% | 2026 |
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| 11, Laidlaw Drive734 m away | 63 m² | 78 m² | +15 m² +24% | 2024 |
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| 20, Stratfield Park Close868 m away | 95 m² | 110 m² | +15 m² +16% | 2024 |
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| Flat 3, Collingridge House, 5, Old Park Road880 m away | 85 m² | 100 m² | +15 m² +18% | 2019 |
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