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 SE20 8ET
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 |
|---|---|---|---|---|
| 41, Beck Lane994 m away | 89 m² | 220 m² | +131 m² +147% | 2023 |
| 130, Maple Road487 m away | 100 m² | 210 m² | +110 m² +110% | 2014 |
| 26, Avington Grove591 m away | 192 m² | 290 m² | +98 m² +51% | 2014 |
| 37, Kings Hall Road994 m away | 187 m² | 280 m² | +93 m² +50% | 2021 |
| 41, Elmers End Road499 m away | 116 m² | 201 m² | +85 m² +73% | 2025 |
| 29, Maple Road125 m away | 76 m² | 157 m² | +81 m² +107% | 2018 |
| 194, Beckenham Road834 m away | 337 m² | 418 m² | +81 m² +24% | 2017 |
| 33, Sheringham Road797 m away | 82 m² | 160 m² | +78 m² +95% | 2019 |
| 191, Ravenscroft Road509 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.
| 63 m² |
| 135 m² |
| +72 m² +114% |
| 2021 |
| 98, Avenue Road603 m away | 72 m² | 143 m² | +71 m² +99% | 2025 |
|---|
| 59, Anerley Park795 m away | 140 m² | 211 m² | +71 m² +51% | 2024 |
|---|
| 26, Ravenscroft Road639 m away | 89 m² | 157 m² | +68 m² +76% | 2025 |
|---|
| 115, Croydon Road386 m away | 261 m² | 329 m² | +68 m² +26% | 2017 |
|---|
| 19, Chesham Crescent297 m away | 105 m² | 172 m² | +67 m² +64% | 2014 |
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| 15, Warwick Road944 m away | 114 m² | 179 m² | +65 m² +57% | 2021 |
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| 45, Kingsdale Road669 m away | 64 m² | 128 m² | +64 m² +100% | 2020 |
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| 80, Ravenscroft Road639 m away | 102 m² | 164 m² | +62 m² +61% | 2020 |
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| 48, Barnmead Road986 m away | 117 m² | 179 m² | +62 m² +53% | 2020 |
|---|
| 50, Birkbeck Road752 m away | 106 m² | 166 m² | +60 m² +57% | 2025 |
|---|
| 152, Blandford Road817 m away | 83 m² | 143 m² | +60 m² +72% | 2021 |
|---|
| 295, Beckenham Road775 m away | 125 m² | 185 m² | +60 m² +48% | 2016 |
|---|
| 5a, Villiers Road824 m away | 92 m² | 151 m² | +59 m² +64% | 2019 |
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| 34, Jasmine Grove335 m away | 150 m² | 204 m² | +54 m² +36% | 2024 |
|---|
| 6, Kenilworth Road499 m away | 104 m² | 158 m² | +54 m² +52% | 2020 |
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| 29, Kingswood Road897 m away | 93 m² | 146 m² | +53 m² +57% | 2026 |
|---|
| 81, Mackenzie Road758 m away | 60 m² | 113 m² | +53 m² +88% | 2022 |
|---|
| 27, Phoenix Road902 m away | 126 m² | 178 m² | +52 m² +41% | 2024 |
|---|
| 5, Southey Street720 m away | 94 m² | 144 m² | +50 m² +53% | 2025 |
|---|
| 86, Barnmead Road838 m away | 97 m² | 146 m² | +49 m² +51% | 2022 |
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| 106, Mackenzie Road735 m away | 76 m² | 125 m² | +49 m² +64% | 2016 |
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| 167, Ravenscroft Road509 m away | 97 m² | 145 m² | +48 m² +49% | 2026 |
|---|
| 5, Kenilworth Road499 m away | 98 m² | 146 m² | +48 m² +49% | 2022 |
|---|
| 34, Pelham Road542 m away | 104 m² | 152 m² | +48 m² +46% | 2021 |
|---|
| 17, Villiers Road824 m away | 101 m² | 148 m² | +47 m² +47% | 2024 |
|---|
| 15, Whateley Road967 m away | 85 m² | 132 m² | +47 m² +55% | 2021 |
|---|
| 62, Tremaine Road610 m away | 138 m² | 185 m² | +47 m² +34% | 2019 |
|---|
| 131, Parish Lane864 m away | 75 m² | 122 m² | +47 m² +63% | 2017 |
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| 91, Blandford Road849 m away | 72 m² | 118 m² | +46 m² +64% | 2026 |
|---|
| 10a, Avington Grove591 m away | 58 m² | 104 m² | +46 m² +79% | 2025 |
|---|
| 386, Blandford Road743 m away | 71 m² | 116 m² | +45 m² +63% | 2022 |
|---|
| 311, Blandford Road785 m away | 86 m² | 131 m² | +45 m² +52% | 2022 |
|---|
| 29, Wheathill Road926 m away | 152 m² | 197 m² | +45 m² +30% | 2016 |
|---|
| 250, Blandford Road752 m away | 66 m² | 109 m² | +43 m² +65% | 2025 |
|---|
| 37, Kingswood Road897 m away | 89 m² | 132 m² | +43 m² +48% | 2024 |
|---|
| 29, Ash Grove435 m away | 85 m² | 128 m² | +43 m² +51% | 2022 |
|---|
| 39, Queen Adelaide Road787 m away | 31 m² | 74 m² | +43 m² +139% | 2010 |
|---|
| 155, Churchfields Road978 m away | 84 m² | 126 m² | +42 m² +50% | 2023 |
|---|
| 116, Mackenzie Road652 m away | 104 m² | 146 m² | +42 m² +40% | 2022 |
|---|
| 33, Kenilworth Road499 m away | 91 m² | 133 m² | +42 m² +46% | 2020 |
|---|
| 18, Green Lane718 m away | 49 m² | 91 m² | +42 m² +86% | 2016 |
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| 48, Chesham Road393 m away | 121 m² | 162 m² | +41 m² +34% | 2025 |
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| 235, Birkbeck Road613 m away | 64 m² | 105 m² | +41 m² +64% | 2025 |
|---|
| 30, Felmingham Road692 m away | 72 m² | 113 m² | +41 m² +57% | 2023 |
|---|
| 3, Warwick Road944 m away | 101 m² | 142 m² | +41 m² +41% | 2022 |
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| 36, Pelham Road542 m away | 108 m² | 148 m² | +40 m² +37% | 2025 |
|---|
| 3, Phoenix Road902 m away | 141 m² | 181 m² | +40 m² +28% | 2025 |
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| 25, Clement Road881 m away | 82 m² | 122 m² | +40 m² +49% | 2023 |
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| 53, Stembridge Road723 m away | 106 m² | 146 m² | +40 m² +38% | 2020 |
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| Flat 4, 11, Thicket Road957 m away | 35 m² | 75 m² | +40 m² +114% | 2012 |
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| 85, Ravenscroft Road678 m away | 91 m² | 130 m² | +39 m² +43% | 2024 |
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| 71, Kingswood Road897 m away | 88 m² | 127 m² | +39 m² +44% | 2022 |
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| 26, Barnmead Road986 m away | 194 m² | 233 m² | +39 m² +20% | 2021 |
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| 285, Beckenham Road775 m away | 59 m² | 97 m² | +38 m² +64% | 2026 |
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| 134, Blandford Road817 m away | 110 m² | 148 m² | +38 m² +35% | 2023 |
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| Flat 61, Queen Adelaide Court, Queen Adelaide Road859 m away | 36 m² | 74 m² | +38 m² +106% | 2020 |
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| 181, High Street592 m away | 32 m² | 70 m² | +38 m² +119% | 2019 |
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| Flat 2, 87, Anerley Road916 m away | 63 m² | 101 m² | +38 m² +60% | 2017 |
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| 130, Mackenzie Road652 m away | 95 m² | 132 m² | +37 m² +39% | 2026 |
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| 174, Beckenham Road834 m away | 178 m² | 215 m² | +37 m² +21% | 2026 |
|---|
| 37, Kenilworth Road499 m away | 85 m² | 122 m² | +37 m² +44% | 2022 |
|---|
| Flat 19, Brooklyn, Anerley Road928 m away | 46 m² | 83 m² | +37 m² +80% | 2014 |
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| 25, Kingswood Road897 m away | 86 m² | 122 m² | +36 m² +42% | 2025 |
|---|
| 10, Crampton Road908 m away | 95 m² | 131 m² | +36 m² +38% | 2024 |
|---|
| 40, Barnmead Road986 m away | 164 m² | 200 m² | +36 m² +22% | 2023 |
|---|
| 76, Blandford Road927 m away | 86 m² | 122 m² | +36 m² +42% | 2021 |
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| 1, Birkbeck Road781 m away | 45 m² | 81 m² | +36 m² +80% | 2018 |
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| 50, Allen Road775 m away | 90 m² | 125 m² | +35 m² +39% | 2025 |
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| 129, Croydon Road386 m away | 227 m² | 262 m² | +35 m² +15% | 2024 |
|---|
| 120, Elmers End Road627 m away | 106 m² | 141 m² | +35 m² +33% | 2022 |
|---|
| 73, Ravenscroft Road678 m away | 101 m² | 136 m² | +35 m² +35% | 2022 |
|---|
| 7, Blandford Avenue965 m away | 84 m² | 119 m² | +35 m² +42% | 2017 |
|---|
| 68, Oakfield Road447 m away | 88 m² | 123 m² | +35 m² +40% | 2014 |
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| 277, Beckenham Road775 m away | 103 m² | 138 m² | +35 m² +34% | 2014 |
|---|
| 16, Elmers End Road364 m away | 124 m² | 158 m² | +34 m² +27% | 2026 |
|---|
| 132, Birkbeck Road557 m away | 117 m² | 151 m² | +34 m² +29% | 2024 |
|---|
| Inchbare, Maple Road246 m away | 34 m² | 68 m² | +34 m² +100% | 2023 |
|---|
| 21, Warwick Road944 m away | 107 m² | 141 m² | +34 m² +32% | 2023 |
|---|
| 55, Wordsworth Road755 m away | 89 m² | 123 m² | +34 m² +38% | 2021 |
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| 172, Birkbeck Road557 m away | 84 m² | 118 m² | +34 m² +40% | 2019 |
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| 119, Mackenzie Road688 m away | 110 m² | 144 m² | +34 m² +31% | 2018 |
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| 13, Stodart Road0 m away | 131 m² | 165 m² | +34 m² +26% | 2017 |
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| 17, Padua Road140 m away | 61 m² | 95 m² | +34 m² +56% | 2016 |
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| Flat 2, 10, Thicket Road897 m away | 39 m² | 73 m² | +34 m² +87% | 2016 |
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| 16, Padua Road140 m away | 119 m² | 152 m² | +33 m² +28% | 2026 |
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| 27, Montrave Road785 m away | 135 m² | 168 m² | +33 m² +24% | 2024 |
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| 116, Blandford Road817 m away | 85 m² | 118 m² | +33 m² +39% | 2023 |
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| 186, Maple Road597 m away | 53 m² | 86 m² | +33 m² +62% | 2020 |
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| 70, Anerley Park750 m away | 53 m² | 86 m² | +33 m² +62% | 2010 |
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| Flat 7, Park House, Anerley Park786 m away | 57 m² | 90 m² | +33 m² +58% | 2009 |
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| 38, Birkbeck Road752 m away | 99 m² | 131 m² | +32 m² +32% | 2026 |
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| 114, Anerley Park795 m away | 125 m² | 157 m² | +32 m² +26% | 2026 |
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| 28, Bourdon Road537 m away | 99 m² | 131 m² | +32 m² +32% | 2024 |
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| 58, Kingswood Road878 m away | 117 m² | 149 m² | +32 m² +27% | 2023 |
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| 29, Pelham Road555 m away | 102 m² | 134 m² | +32 m² +31% | 2022 |
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| 28, Oak Grove Road266 m away | 80 m² | 112 m² | +32 m² +40% | 2021 |
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| 5, Piquet Road664 m away | 118 m² | 150 m² | +32 m² +27% | 2018 |
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| 16, Blandford Road927 m away | 95 m² | 127 m² | +32 m² +34% | 2015 |
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| 30, Stembridge Road761 m away | 85 m² | 117 m² | +32 m² +38% | 2013 |
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| 62, Barnmead Road986 m away | 120 m² | 151 m² | +31 m² +26% | 2026 |
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| 31, Torr Road751 m away | 86 m² | 117 m² | +31 m² +36% | 2023 |
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| 50a, Croydon Road286 m away | 69 m² | 100 m² | +31 m² +45% | 2021 |
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| 40, Stodart Road0 m away | 103 m² | 134 m² | +31 m² +30% | 2019 |
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| 72a, Samos Road600 m away | 79 m² | 110 m² | +31 m² +39% | 2019 |
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| 1, Wadhurst Close721 m away | 56 m² | 87 m² | +31 m² +55% | 2016 |
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| 49b, Anerley Park750 m away | 80 m² | 111 m² | +31 m² +39% | 2015 |
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| 20, Warwick Road965 m away | 112 m² | 143 m² | +31 m² +28% | 2014 |
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| 30, Parish Lane969 m away | 42 m² | 73 m² | +31 m² +74% | 2010 |
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| 105, Seymour Villas576 m away | 62 m² | 92 m² | +30 m² +48% | 2026 |
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| 46, Blandford Road927 m away | 98 m² | 128 m² | +30 m² +31% | 2025 |
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| 41, Arrol Road826 m away | 75 m² | 105 m² | +30 m² +40% | 2022 |
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| 15, Green Lane718 m away | 111 m² | 141 m² | +30 m² +27% | 2015 |
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| Flat 25, Brooklyn, Anerley Road928 m away | 40 m² | 70 m² | +30 m² +75% | 2013 |
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| 13, Kings Hall Road994 m away | 168 m² | 197 m² | +29 m² +17% | 2024 |
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| 22a, Avington Grove591 m away | 35 m² | 64 m² | +29 m² +83% | 2022 |
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| 150, Beckenham Road834 m away | 178 m² | 207 m² | +29 m² +16% | 2021 |
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| 170, Birkbeck Road557 m away | 86 m² | 115 m² | +29 m² +34% | 2020 |
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| 49, Clevedon Road557 m away | 107 m² | 136 m² | +29 m² +27% | 2018 |
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| 50, Stembridge Road761 m away | 79 m² | 107 m² | +28 m² +35% | 2026 |
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| 109, Elmers End Road643 m away | 51 m² | 79 m² | +28 m² +55% | 2023 |
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| 50c, Thicket Road884 m away | 67 m² | 95 m² | +28 m² +42% | 2022 |
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| 265a, Beckenham Road775 m away | 74 m² | 102 m² | +28 m² +38% | 2021 |
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| 28, Green Lane698 m away | 88 m² | 116 m² | +28 m² +32% | 2015 |
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| 123, Ravenscroft Road509 m away | 85 m² | 112 m² | +27 m² +32% | 2026 |
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| Flat 10, Queen Adelaide Court, Queen Adelaide Road856 m away | 45 m² | 72 m² | +27 m² +60% | 2025 |
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| 70, Wordsworth Road774 m away | 91 m² | 118 m² | +27 m² +30% | 2024 |
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| 4a, Tremaine Road610 m away | 53 m² | 80 m² | +27 m² +51% | 2023 |
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| 49b, Parish Lane998 m away | 41 m² | 68 m² | +27 m² +66% | 2022 |
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| 50, Barnmead Road986 m away | 150 m² | 177 m² | +27 m² +18% | 2021 |
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| 105, Avenue Road610 m away | 71 m² | 98 m² | +27 m² +38% | 2020 |
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| 76, Ravenscroft Road639 m away | 114 m² | 141 m² | +27 m² +24% | 2017 |
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| 94, Ravenscroft Road639 m away | 113 m² | 140 m² | +27 m² +24% | 2017 |
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| Flat 5, 101a, Parish Lane886 m away | 36 m² | 62 m² | +26 m² +72% | 2025 |
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| 34, Kings Hall Road935 m away | 114 m² | 140 m² | +26 m² +23% | 2023 |
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| 23, Cottingham Road675 m away | 78 m² | 104 m² | +26 m² +33% | 2022 |
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| Flat 6, Strood House, Evelina Road485 m away | 19 m² | 45 m² | +26 m² +137% | 2020 |
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| 166, Birkbeck Road557 m away | 87 m² | 113 m² | +26 m² +30% | 2020 |
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| 56, Selby Road974 m away | 104 m² | 130 m² | +26 m² +25% | 2020 |
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| 2c, Hawthorn Grove344 m away | 96 m² | 122 m² | +26 m² +27% | 2014 |
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| 193, Birkbeck Road585 m away | 94 m² | 119 m² | +25 m² +27% | 2026 |
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| 14, Villiers Road824 m away | 73 m² | 98 m² | +25 m² +34% | 2024 |
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| 22, Green Lane718 m away | 42 m² | 67 m² | +25 m² +60% | 2020 |
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| 124, Blandford Road817 m away | 74 m² | 99 m² | +25 m² +34% | 2020 |
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| 29, Chesham Road393 m away | 55 m² | 80 m² | +25 m² +45% | 2019 |
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| 2, Crampton Road908 m away | 86 m² | 111 m² | +25 m² +29% | 2019 |
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| 8, Green Lane718 m away | 83 m² | 108 m² | +25 m² +30% | 2009 |
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| 24, Trenholme Road710 m away | 75 m² | 99 m² | +24 m² +32% | 2026 |
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| 76, Mackenzie Road735 m away | 86 m² | 110 m² | +24 m² +28% | 2025 |
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| 40, Kenilworth Road499 m away | 126 m² | 150 m² | +24 m² +19% | 2024 |
|---|
| 1, Seymour Terrace632 m away | 138 m² | 162 m² | +24 m² +17% | 2024 |
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| Flat 4, 180, Birkbeck Road557 m away | 49 m² | 73 m² | +24 m² +49% | 2022 |
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| 30, Birkbeck Road752 m away | 89 m² | 113 m² | +24 m² +27% | 2022 |
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| 27, Albert Road952 m away | 44 m² | 68 m² | +24 m² +55% | 2021 |
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| 114, Marlow Road774 m away | 99 m² | 123 m² | +24 m² +24% | 2020 |
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| 18, Piquet Road671 m away | 106 m² | 130 m² | +24 m² +23% | 2018 |
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| Flat 5, 26, Chestnut Grove295 m away | 45 m² | 69 m² | +24 m² +53% | 2017 |
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| 25, Whateley Road967 m away | 90 m² | 113 m² | +23 m² +26% | 2026 |
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| 152, Maple Road487 m away | 52 m² | 75 m² | +23 m² +44% | 2025 |
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| 30, Seymour Villas594 m away | 74 m² | 97 m² | +23 m² +31% | 2024 |
|---|
| 27, Ash Grove435 m away | 101 m² | 124 m² | +23 m² +23% | 2022 |
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| 76, Birkbeck Road660 m away | 92 m² | 115 m² | +23 m² +25% | 2022 |
|---|
| 12, Villiers Road824 m away | 74 m² | 97 m² | +23 m² +31% | 2022 |
|---|
| 25, Tennyson Road977 m away | 89 m² | 112 m² | +23 m² +26% | 2021 |
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| Flat 10, Golden Mews, 15, Howard Road253 m away | 71 m² | 94 m² | +23 m² +32% | 2018 |
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| Flat 4, 9, St Johns Road746 m away | 37 m² | 60 m² | +23 m² +62% | 2018 |
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| 58, Hawthorn Grove344 m away | 52 m² | 75 m² | +23 m² +44% | 2017 |
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| 65, William Booth Road809 m away | 40 m² | 63 m² | +23 m² +57% | 2014 |
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| 41, William Booth Road809 m away | 40 m² | 63 m² | +23 m² +57% | 2014 |
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| Flat 22, Brooklyn, Anerley Road928 m away | 66 m² | 89 m² | +23 m² +35% | 2012 |
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| 20a, Ash Grove435 m away | 48 m² | 70 m² | +22 m² +46% | 2023 |
|---|
| 11, Trenholme Road710 m away | 87 m² | 109 m² | +22 m² +25% | 2023 |
|---|
| 4, Mackenzie Road828 m away | 103 m² | 125 m² | +22 m² +21% | 2023 |
|---|
| 35, Sheringham Road797 m away | 83 m² | 105 m² | +22 m² +27% | 2021 |
|---|
| 20, Kimberley Road870 m away | 64 m² | 86 m² | +22 m² +34% | 2021 |
|---|
| 30, Blandford Avenue965 m away | 74 m² | 96 m² | +22 m² +30% | 2021 |
|---|
| 7a, Howard Road253 m away | 85 m² | 107 m² | +22 m² +26% | 2020 |
|---|
| 24a, Jasmine Grove335 m away | 31 m² | 53 m² | +22 m² +71% | 2020 |
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| Flat 7, 56, Thicket Road884 m away | 41 m² | 63 m² | +22 m² +54% | 2020 |
|---|
| 19, High Street816 m away | 78 m² | 100 m² | +22 m² +28% | 2019 |
|---|
| Flat 2, 11, Thicket Road957 m away | 35 m² | 57 m² | +22 m² +63% | 2019 |
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| Flat 6b, Ellesmere Court, Seymour Villas675 m away | 70 m² | 92 m² | +22 m² +31% | 2017 |
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| Flat 26, Roberts Court, Maple Road117 m away | 39 m² | 61 m² | +22 m² +56% | 2014 |
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| Flat 15, Penceat Court, 17, Bourdon Road523 m away | 29 m² | 51 m² | +22 m² +76% | 2013 |
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| Flat 46, Wheathill House, Croydon Road851 m away | 66 m² | 88 m² | +22 m² +33% | 2012 |
|---|
| 14, Parkside Close619 m away | 60 m² | 81 m² | +21 m² +35% | 2025 |
|---|
| 8, Queen Adelaide Road787 m away | 85 m² | 106 m² | +21 m² +25% | 2024 |
|---|
| 34, Villiers Road824 m away | 87 m² | 108 m² | +21 m² +24% | 2024 |
|---|
| 51, Selby Road974 m away | 99 m² | 120 m² | +21 m² +21% | 2023 |
|---|
| 152, Ravenscroft Road472 m away | 66 m² | 87 m² | +21 m² +32% | 2022 |
|---|
| 35, Cottingham Road675 m away | 78 m² | 99 m² | +21 m² +27% | 2022 |
|---|
| 26, Felmingham Road692 m away | 75 m² | 96 m² | +21 m² +28% | 2021 |
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