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 SL6 4AW
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 |
|---|---|---|---|---|
| 22, Westfield Road566 m away | 188 m² | 395 m² | +207 m² +110% | 2026 |
| 11, Altwood Drive906 m away | 230 m² | 380 m² | +150 m² +65% | 2020 |
| 89, Penyston Road210 m away | 117 m² | 252 m² | +135 m² +115% | 2026 |
| 3, Archer Close958 m away | 114 m² | 246 m² | +132 m² +116% | 2019 |
| 12, College Road888 m away | 106 m² | 235 m² | +129 m² +122% | 2015 |
| 58, All Saints Avenue541 m away | 112 m² | 234 m² | +122 m² +109% | 2017 |
| 5, The Courtyard463 m away | 132 m² | 249 m² | +117 m² +89% | 2026 |
| 52, Bath Road198 m away | 213 m² | 329 m² | +116 m² +54% | 2016 |
| 3, Norden Meadows518 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.
| 97 m² |
| 211 m² |
| +114 m² +118% |
| 2026 |
| 11, Westfield Road566 m away | 97 m² | 211 m² | +114 m² +118% | 2015 |
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| 19, Westfield Road566 m away | 145 m² | 258 m² | +113 m² +78% | 2025 |
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| 34a, Rutland Road154 m away | 78 m² | 188 m² | +110 m² +141% | 2015 |
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| 8, Napier Road753 m away | 87 m² | 188 m² | +101 m² +116% | 2019 |
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| The Cottage, Boyndon Road600 m away | 171 m² | 268 m² | +97 m² +57% | 2019 |
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| 10, Larchfield Road923 m away | 78 m² | 173 m² | +95 m² +122% | 2026 |
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| 22, Wootton Way330 m away | 109 m² | 199 m² | +90 m² +83% | 2025 |
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| 5, Birdwood Road896 m away | 105 m² | 195 m² | +90 m² +86% | 2016 |
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| 131, Courthouse Road875 m away | 104 m² | 192 m² | +88 m² +85% | 2023 |
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| 40, Wavell Road510 m away | 81 m² | 169 m² | +88 m² +109% | 2012 |
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| 13, College Road924 m away | 83 m² | 169 m² | +86 m² +104% | 2018 |
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| 17, Silvertrees Drive908 m away | 143 m² | 225 m² | +82 m² +57% | 2015 |
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| 52, Birdwood Road896 m away | 105 m² | 183 m² | +78 m² +74% | 2018 |
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| 22, Penyston Road336 m away | 89 m² | 166 m² | +77 m² +87% | 2016 |
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| Beechwood, 69, All Saints Avenue629 m away | 83 m² | 160 m² | +77 m² +93% | 2016 |
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| 27, Shirley Road631 m away | 78 m² | 152 m² | +74 m² +95% | 2021 |
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| 4, Gordon Road618 m away | 80 m² | 153 m² | +73 m² +91% | 2022 |
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| 61, St Marks Crescent870 m away | 123 m² | 188 m² | +65 m² +53% | 2026 |
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| Maple Dean, Altwood Close836 m away | 208 m² | 273 m² | +65 m² +31% | 2023 |
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| 75, St Marks Road529 m away | 94 m² | 158 m² | +64 m² +68% | 2019 |
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| 20, Penyston Road336 m away | 98 m² | 162 m² | +64 m² +65% | 2017 |
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| 28a, College Road888 m away | 113 m² | 174 m² | +61 m² +54% | 2024 |
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| 22, Ashcroft Road950 m away | 121 m² | 181 m² | +60 m² +50% | 2021 |
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| 31, College Rise778 m away | 87 m² | 146 m² | +59 m² +68% | 2021 |
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| 30, Great Hill Crescent400 m away | 115 m² | 173 m² | +58 m² +50% | 2026 |
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| 34, Shirley Road631 m away | 79 m² | 137 m² | +58 m² +73% | 2026 |
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| 2, Rutland Place112 m away | 123 m² | 181 m² | +58 m² +47% | 2020 |
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| 48, Boyn Hill Road288 m away | 87 m² | 144 m² | +57 m² +66% | 2021 |
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| 6, Havelock Road632 m away | 97 m² | 153 m² | +56 m² +58% | 2014 |
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| 10, College Road888 m away | 158 m² | 213 m² | +55 m² +35% | 2026 |
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| 18, Highfield Road924 m away | 73 m² | 128 m² | +55 m² +75% | 2022 |
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| 75, All Saints Avenue629 m away | 96 m² | 151 m² | +55 m² +57% | 2020 |
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| 65, Portlock Road403 m away | 76 m² | 129 m² | +53 m² +70% | 2023 |
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| 10, Shirley Road631 m away | 79 m² | 131 m² | +52 m² +66% | 2025 |
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| 50, All Saints Avenue541 m away | 86 m² | 138 m² | +52 m² +60% | 2023 |
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| 4, Altwood Road501 m away | 65 m² | 116 m² | +51 m² +78% | 2023 |
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| 42, Spencers Road817 m away | 84 m² | 134 m² | +50 m² +60% | 2022 |
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| Aberdeen House, 1 - 3, Cromwell Road741 m away | 52 m² | 102 m² | +50 m² +96% | 2019 |
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| 1, Courtfield Drive177 m away | 80 m² | 129 m² | +49 m² +61% | 2014 |
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| 85, Clare Road680 m away | 85 m² | 133 m² | +48 m² +56% | 2020 |
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| 15, Rixman Close593 m away | 73 m² | 120 m² | +47 m² +64% | 2026 |
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| 16, Highway Avenue845 m away | 69 m² | 115 m² | +46 m² +67% | 2026 |
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| Greenleas, Altwood Close836 m away | 137 m² | 183 m² | +46 m² +34% | 2022 |
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| 53, Wavell Road471 m away | 89 m² | 134 m² | +45 m² +51% | 2021 |
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| 38, All Saints Avenue541 m away | 102 m² | 147 m² | +45 m² +44% | 2021 |
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| 8, Badminton Road432 m away | 85 m² | 128 m² | +43 m² +51% | 2022 |
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| 18, Haddon Road511 m away | 114 m² | 157 m² | +43 m² +38% | 2019 |
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| Lavender Cottage, Folly Way908 m away | 61 m² | 104 m² | +43 m² +70% | 2016 |
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| 52, Wootton Way380 m away | 63 m² | 105 m² | +42 m² +67% | 2025 |
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| 3, Audley Drive449 m away | 94 m² | 136 m² | +42 m² +45% | 2025 |
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| 121, Boyn Valley Road735 m away | 90 m² | 132 m² | +42 m² +47% | 2023 |
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| 29, Cromwell Road741 m away | 96 m² | 138 m² | +42 m² +44% | 2023 |
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| 3, St Pauls Gardens952 m away | 101 m² | 142 m² | +41 m² +41% | 2022 |
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| 2, Altwood Gate, Altwood Road799 m away | 41 m² | 82 m² | +41 m² +100% | 2020 |
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| 52, All Saints Avenue541 m away | 106 m² | 146 m² | +40 m² +38% | 2026 |
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| 61, Belmont Road959 m away | 85 m² | 125 m² | +40 m² +47% | 2025 |
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| 25, College Rise778 m away | 93 m² | 133 m² | +40 m² +43% | 2023 |
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| 10, Courthouse Road294 m away | 72 m² | 111 m² | +39 m² +54% | 2025 |
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| 209, Clare Road424 m away | 89 m² | 128 m² | +39 m² +44% | 2025 |
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| 20, Wellington Road626 m away | 94 m² | 133 m² | +39 m² +41% | 2025 |
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| 20, Highway Avenue845 m away | 85 m² | 124 m² | +39 m² +46% | 2023 |
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| 132, Westborough Road313 m away | 102 m² | 141 m² | +39 m² +38% | 2021 |
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| 40, Highway Avenue964 m away | 57 m² | 96 m² | +39 m² +68% | 2021 |
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| 18, Hever Close275 m away | 55 m² | 94 m² | +39 m² +71% | 2016 |
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| 96, All Saints Avenue659 m away | 134 m² | 172 m² | +38 m² +28% | 2026 |
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| Flat 6, Westgate, 1, Highway Avenue862 m away | 49 m² | 87 m² | +38 m² +78% | 2018 |
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| 31, Courtfield Drive177 m away | 84 m² | 121 m² | +37 m² +44% | 2026 |
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| 87, St Marks Crescent870 m away | 137 m² | 174 m² | +37 m² +27% | 2024 |
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| 34, Laburnham Road634 m away | 149 m² | 185 m² | +36 m² +24% | 2022 |
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| 38, Westborough Road56 m away | 81 m² | 117 m² | +36 m² +44% | 2020 |
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| 5, St Francis Road996 m away | 102 m² | 138 m² | +36 m² +35% | 2020 |
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| 1, Altwood Road540 m away | 141 m² | 177 m² | +36 m² +26% | 2012 |
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| 9, Fane Way872 m away | 89 m² | 124 m² | +35 m² +39% | 2025 |
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| 28, Highway Avenue964 m away | 83 m² | 118 m² | +35 m² +42% | 2025 |
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| 62, Belmont Crescent890 m away | 168 m² | 203 m² | +35 m² +21% | 2022 |
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| 7, Highfield Road924 m away | 110 m² | 145 m² | +35 m² +32% | 2022 |
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| 19, Portlock Road403 m away | 73 m² | 107 m² | +34 m² +47% | 2024 |
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| 1a, Rutland Place112 m away | 108 m² | 142 m² | +34 m² +31% | 2019 |
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| 20, Welbeck Road431 m away | 69 m² | 103 m² | +34 m² +49% | 2016 |
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| 23, Rutland Place112 m away | 93 m² | 126 m² | +33 m² +35% | 2024 |
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| 9, Altwood Road540 m away | 98 m² | 131 m² | +33 m² +34% | 2024 |
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| 35, Penyston Road309 m away | 80 m² | 113 m² | +33 m² +41% | 2023 |
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| 101, Belmont Road899 m away | 85 m² | 118 m² | +33 m² +39% | 2018 |
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| 15, St Marks Road589 m away | 127 m² | 159 m² | +32 m² +25% | 2026 |
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| 52, Portlock Road370 m away | 73 m² | 105 m² | +32 m² +44% | 2024 |
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| 75, Penyston Road210 m away | 74 m² | 106 m² | +32 m² +43% | 2021 |
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| 13, Dunwood Court, Boyn Valley Road483 m away | 41 m² | 73 m² | +32 m² +78% | 2021 |
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| 25, Clare Road823 m away | 61 m² | 93 m² | +32 m² +52% | 2020 |
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| 141, Grenfell Road977 m away | 118 m² | 150 m² | +32 m² +27% | 2020 |
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| 9, Cromwell Road741 m away | 88 m² | 120 m² | +32 m² +36% | 2017 |
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| 69, Clare Road680 m away | 91 m² | 122 m² | +31 m² +34% | 2025 |
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| 45, Fane Way872 m away | 73 m² | 104 m² | +31 m² +42% | 2023 |
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| 19, Boyn Valley Road498 m away | 74 m² | 105 m² | +31 m² +42% | 2020 |
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| 64, Portlock Road370 m away | 72 m² | 102 m² | +30 m² +42% | 2023 |
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| 11, Clare Road823 m away | 95 m² | 125 m² | +30 m² +32% | 2020 |
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| 25, College Glen828 m away | 75 m² | 104 m² | +29 m² +39% | 2025 |
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| 63, St Marks Crescent870 m away | 113 m² | 142 m² | +29 m² +26% | 2025 |
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| The Garth, Altwood Close836 m away | 173 m² | 202 m² | +29 m² +17% | 2023 |
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| 99, Clare Road680 m away | 98 m² | 127 m² | +29 m² +30% | 2021 |
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| 55, College Glen828 m away | 104 m² | 133 m² | +29 m² +28% | 2020 |
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| 73, Belmont Crescent907 m away | 38 m² | 67 m² | +29 m² +76% | 2019 |
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| 4, Archer Close958 m away | 136 m² | 165 m² | +29 m² +21% | 2017 |
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| 84, All Saints Avenue659 m away | 90 m² | 119 m² | +29 m² +32% | 2014 |
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| 12, Portlock Road370 m away | 76 m² | 104 m² | +28 m² +37% | 2025 |
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| 22, Norden Meadows518 m away | 106 m² | 134 m² | +28 m² +26% | 2021 |
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| 50, Penyston Road336 m away | 100 m² | 128 m² | +28 m² +28% | 2017 |
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| 76, Powney Road371 m away | 24 m² | 52 m² | +28 m² +117% | 2017 |
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| 43, Allenby Road701 m away | 135 m² | 162 m² | +27 m² +20% | 2022 |
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| A home on St Marks Crescent903 m away | 76 m² | 103 m² | +27 m² +36% | 2019 |
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| 57, Highway Avenue984 m away | 72 m² | 99 m² | +27 m² +38% | 2019 |
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| 15, Boyn Hill Close305 m away | 88 m² | 115 m² | +27 m² +31% | 2011 |
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| 112, Clare Road647 m away | 77 m² | 103 m² | +26 m² +34% | 2026 |
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| 8, St Pauls Gardens952 m away | 93 m² | 119 m² | +26 m² +28% | 2026 |
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| 115, Belmont Road899 m away | 88 m² | 114 m² | +26 m² +30% | 2025 |
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| 10, Sutton Close317 m away | 70 m² | 96 m² | +26 m² +37% | 2024 |
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| 27, Rutland Place112 m away | 85 m² | 111 m² | +26 m² +31% | 2016 |
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| 3, Penshurst Road421 m away | 71 m² | 97 m² | +26 m² +37% | 2016 |
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| 2, The Courtyard463 m away | 133 m² | 158 m² | +25 m² +19% | 2026 |
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| Flat 1, 5, Laburnham Road801 m away | 111 m² | 136 m² | +25 m² +23% | 2023 |
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| 8, Wellington Road626 m away | 96 m² | 121 m² | +25 m² +26% | 2013 |
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| 2, Powney Road217 m away | 91 m² | 115 m² | +24 m² +26% | 2025 |
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| 11, Castle Court790 m away | 67 m² | 91 m² | +24 m² +36% | 2020 |
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| 13, Boyn Hill Road295 m away | 108 m² | 132 m² | +24 m² +22% | 2013 |
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| Flat 4, Boyn Hill Court, 19, Boyn Hill Avenue545 m away | 73 m² | 97 m² | +24 m² +33% | 2013 |
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| 12, St Marks Crescent773 m away | 100 m² | 124 m² | +24 m² +24% | 2011 |
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| 44, Audley Drive415 m away | 33 m² | 56 m² | +23 m² +70% | 2026 |
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| 128, All Saints Avenue810 m away | 118 m² | 141 m² | +23 m² +19% | 2026 |
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| The Dovecote, Altwood Bailey766 m away | 107 m² | 130 m² | +23 m² +21% | 2024 |
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| 9a, Rutland Road202 m away | 123 m² | 146 m² | +23 m² +19% | 2023 |
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| 59, Boyn Hill Road406 m away | 151 m² | 174 m² | +23 m² +15% | 2020 |
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| 11, Boyn Hill Close305 m away | 94 m² | 116 m² | +22 m² +23% | 2026 |
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| 40, Portlock Road370 m away | 72 m² | 94 m² | +22 m² +31% | 2026 |
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| 12, Dunwood Court, Boyn Valley Road483 m away | 51 m² | 73 m² | +22 m² +43% | 2024 |
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| 5, Courtfield Drive177 m away | 92 m² | 114 m² | +22 m² +24% | 2023 |
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| 36, The Wickets438 m away | 40 m² | 62 m² | +22 m² +55% | 2022 |
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| 10, College Glen828 m away | 84 m² | 106 m² | +22 m² +26% | 2022 |
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| 135, Grenfell Road977 m away | 103 m² | 125 m² | +22 m² +21% | 2022 |
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| Flat 2, Boyn Hill Court, 19, Boyn Hill Avenue545 m away | 79 m² | 101 m² | +22 m² +28% | 2021 |
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| 12, Raymond Road682 m away | 105 m² | 127 m² | +22 m² +21% | 2021 |
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| 10, Kings Grove906 m away | 119 m² | 141 m² | +22 m² +18% | 2017 |
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| 56, Portlock Road370 m away | 81 m² | 102 m² | +21 m² +26% | 2022 |
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| Flat 2, Arvon House, 3, Boyn Hill Avenue739 m away | 49 m² | 70 m² | +21 m² +43% | 2021 |
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| 5, Cromwell Road741 m away | 91 m² | 112 m² | +21 m² +23% | 2021 |
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| 30, Cromwell Road741 m away | 97 m² | 118 m² | +21 m² +22% | 2016 |
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| Flat 7, Carlyon House 104, Boyn Hill Road394 m away | 49 m² | 69 m² | +20 m² +41% | 2026 |
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| Flat 14, Hill View Court, 13, Bhamra Gardens343 m away | 108 m² | 128 m² | +20 m² +19% | 2024 |
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| 13, Raymond Road682 m away | 85 m² | 105 m² | +20 m² +24% | 2023 |
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| 10, Wellington Road626 m away | 109 m² | 129 m² | +20 m² +18% | 2022 |
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| 6, St Francis Road996 m away | 105 m² | 125 m² | +20 m² +19% | 2019 |
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| 9, College Road965 m away | 93 m² | 113 m² | +20 m² +22% | 2018 |
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| 93, Penyston Road210 m away | 82 m² | 102 m² | +20 m² +24% | 2016 |
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| 34, Alwyn Road873 m away | 121 m² | 140 m² | +19 m² +16% | 2025 |
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| 126, All Saints Avenue810 m away | 121 m² | 140 m² | +19 m² +16% | 2024 |
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| 99, Belmont Road899 m away | 67 m² | 86 m² | +19 m² +28% | 2024 |
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| 3, College Road965 m away | 86 m² | 105 m² | +19 m² +22% | 2023 |
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| 53, College Glen828 m away | 89 m² | 108 m² | +19 m² +21% | 2022 |
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| 14, Spencers Road817 m away | 67 m² | 86 m² | +19 m² +28% | 2020 |
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| 15, College Glen828 m away | 65 m² | 84 m² | +19 m² +29% | 2020 |
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| 133, Grenfell Road977 m away | 108 m² | 127 m² | +19 m² +18% | 2019 |
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| 82, Clare Road647 m away | 78 m² | 97 m² | +19 m² +24% | 2017 |
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| 107, Westborough Road296 m away | 59 m² | 78 m² | +19 m² +32% | 2016 |
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| 2a, Welbeck Road431 m away | 94 m² | 112 m² | +18 m² +19% | 2026 |
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| 121, Belmont Road899 m away | 103 m² | 121 m² | +18 m² +17% | 2023 |
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| 3, Boyn Valley Road498 m away | 79 m² | 96 m² | +17 m² +22% | 2024 |
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| Flat 4, Salisbury Court, Ludlow Road993 m away | 35 m² | 52 m² | +17 m² +49% | 2024 |
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| 18, Spencers Road817 m away | 92 m² | 109 m² | +17 m² +18% | 2022 |
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| 58, Portlock Road370 m away | 81 m² | 98 m² | +17 m² +21% | 2019 |
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| 9, Belmont Vale808 m away | 85 m² | 102 m² | +17 m² +20% | 2019 |
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| 23, Desborough Crescent759 m away | 70 m² | 87 m² | +17 m² +24% | 2017 |
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| 8, Penwood Court, Allenby Road920 m away | 66 m² | 83 m² | +17 m² +26% | 2017 |
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| 12a, Norden Road680 m away | 53 m² | 70 m² | +17 m² +32% | 2016 |
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| 33, Croxley Rise369 m away | 57 m² | 73 m² | +16 m² +28% | 2016 |
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| 23, Brunel Road736 m away | 52 m² | 68 m² | +16 m² +31% | 2015 |
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| 35, Brunel Road736 m away | 56 m² | 72 m² | +16 m² +29% | 2015 |
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| 17, Boyn Hill Close305 m away | 98 m² | 114 m² | +16 m² +16% | 2014 |
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| 10, Lexington Avenue459 m away | 98 m² | 114 m² | +16 m² +16% | 2013 |
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| 124, Westborough Road313 m away | 74 m² | 89 m² | +15 m² +20% | 2025 |
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| 8, Rutland Gate64 m away | 100 m² | 115 m² | +15 m² +15% | 2023 |
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| 17, Alwyn Road844 m away | 75 m² | 90 m² | +15 m² +20% | 2022 |
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| 71, Belmont Crescent907 m away | 63 m² | 78 m² | +15 m² +24% | 2022 |
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