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 N3 1NL
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 |
|---|---|---|---|---|
| 612, High Road739 m away | 145 m² | 302 m² | +157 m² +108% | 2025 |
| 16, Saddlescombe Way944 m away | 121 m² | 278 m² | +157 m² +130% | 2023 |
| 77, Westbury Road691 m away | 131 m² | 287 m² | +156 m² +119% | 2013 |
| 48, Fursby Avenue525 m away | 109 m² | 260 m² | +151 m² +139% | 2022 |
| 104, Nether Street488 m away | 201 m² | 336 m² | +135 m² +67% | 2019 |
| 36, Kenver Avenue831 m away | 104 m² | 239 m² | +135 m² +130% | 2012 |
| 17, Westbury Road880 m away | 196 m² | 320 m² | +124 m² +63% | 2018 |
| 8, Poynings Way907 m away | 115 m² | 237 m² | +122 m² +106% | 2023 |
| 87, Wentworth Avenue249 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.
| 90 m² |
| 210 m² |
| +120 m² +133% |
| 2020 |
| 2, Chesterfield Road649 m away | 91 m² | 209 m² | +118 m² +130% | 2016 |
|---|
| 2, Claigmar Gardens819 m away | 106 m² | 214 m² | +108 m² +102% | 2025 |
|---|
| 608, High Road739 m away | 265 m² | 370 m² | +105 m² +40% | 2023 |
|---|
| 15, Saddlescombe Way944 m away | 186 m² | 289 m² | +103 m² +55% | 2016 |
|---|
| 1, West Avenue551 m away | 112 m² | 213 m² | +101 m² +90% | 2022 |
|---|
| 89, Wentworth Avenue249 m away | 111 m² | 210 m² | +99 m² +89% | 2020 |
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| 36, Gainsborough Road989 m away | 113 m² | 208 m² | +95 m² +84% | 2022 |
|---|
| 8, Redbourne Avenue725 m away | 185 m² | 280 m² | +95 m² +51% | 2018 |
|---|
| 38, Essex Park179 m away | 111 m² | 204 m² | +93 m² +84% | 2014 |
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| 4, Eton Avenue559 m away | 112 m² | 200 m² | +88 m² +79% | 2019 |
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| 46, Redbourne Avenue725 m away | 161 m² | 248 m² | +87 m² +54% | 2020 |
|---|
| 4, Park Avenue688 m away | 75 m² | 161 m² | +86 m² +115% | 2025 |
|---|
| 29a, Westbury Road880 m away | 111 m² | 197 m² | +86 m² +77% | 2018 |
|---|
| 17, Finchley Way672 m away | 140 m² | 226 m² | +86 m² +61% | 2017 |
|---|
| 35, Alexandra Grove547 m away | 176 m² | 262 m² | +86 m² +49% | 2015 |
|---|
| 95, Walmington Fold817 m away | 96 m² | 180 m² | +84 m² +88% | 2025 |
|---|
| 57, Courthouse Road581 m away | 98 m² | 182 m² | +84 m² +86% | 2016 |
|---|
| 57, Cissbury Ring South981 m away | 109 m² | 192 m² | +83 m² +76% | 2016 |
|---|
| 8, Rosemont Avenue700 m away | 128 m² | 209 m² | +81 m² +63% | 2024 |
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| 132, Etchingham Park Road741 m away | 122 m² | 202 m² | +80 m² +66% | 2024 |
|---|
| 26, Claverley Grove533 m away | 109 m² | 186 m² | +77 m² +71% | 2020 |
|---|
| 68, Queens Avenue624 m away | 116 m² | 192 m² | +76 m² +66% | 2024 |
|---|
| 43, Etchingham Park Road329 m away | 205 m² | 281 m² | +76 m² +37% | 2022 |
|---|
| 25, Cissbury Ring South981 m away | 115 m² | 191 m² | +76 m² +66% | 2022 |
|---|
| 2, Crescent Road988 m away | 127 m² | 202 m² | +75 m² +59% | 2023 |
|---|
| 34, Courthouse Road538 m away | 91 m² | 165 m² | +74 m² +81% | 2023 |
|---|
| 45, Redbourne Avenue753 m away | 174 m² | 246 m² | +72 m² +41% | 2026 |
|---|
| 51, Bow Lane520 m away | 131 m² | 202 m² | +71 m² +54% | 2020 |
|---|
| 5, Mossborough Close371 m away | 96 m² | 166 m² | +70 m² +73% | 2022 |
|---|
| 45, Holdenhurst Avenue441 m away | 104 m² | 173 m² | +69 m² +66% | 2022 |
|---|
| 46, Moss Hall Grove366 m away | 124 m² | 192 m² | +68 m² +55% | 2021 |
|---|
| 58, Woodlands Avenue620 m away | 93 m² | 161 m² | +68 m² +73% | 2020 |
|---|
| 9, Park Avenue688 m away | 98 m² | 166 m² | +68 m² +69% | 2020 |
|---|
| 38, Nethercourt Avenue532 m away | 102 m² | 168 m² | +66 m² +65% | 2024 |
|---|
| 24, Courthouse Road538 m away | 102 m² | 168 m² | +66 m² +65% | 2024 |
|---|
| 3, Lansdowne Road731 m away | 58 m² | 124 m² | +66 m² +114% | 2014 |
|---|
| 1, Grosvenor Road820 m away | 101 m² | 166 m² | +65 m² +64% | 2022 |
|---|
| 23, Gainsborough Road918 m away | 132 m² | 197 m² | +65 m² +49% | 2021 |
|---|
| 28, Courthouse Road538 m away | 92 m² | 156 m² | +64 m² +70% | 2025 |
|---|
| 31, Linkside909 m away | 97 m² | 159 m² | +62 m² +64% | 2024 |
|---|
| 93, Walmington Fold817 m away | 107 m² | 168 m² | +61 m² +57% | 2023 |
|---|
| 5, Willow Way375 m away | 112 m² | 173 m² | +61 m² +54% | 2014 |
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| 67, Westbury Road691 m away | 117 m² | 177 m² | +60 m² +51% | 2023 |
|---|
| 30, Dollis Road993 m away | 56 m² | 116 m² | +60 m² +107% | 2023 |
|---|
| 35, Oakfield Road766 m away | 106 m² | 166 m² | +60 m² +57% | 2022 |
|---|
| 46, Hervey Close813 m away | 109 m² | 169 m² | +60 m² +55% | 2020 |
|---|
| 11, Cornwall Avenue442 m away | 99 m² | 158 m² | +59 m² +60% | 2024 |
|---|
| 26, Glebe Road971 m away | 52 m² | 111 m² | +59 m² +113% | 2019 |
|---|
| 86, Gordon Road897 m away | 102 m² | 160 m² | +58 m² +57% | 2020 |
|---|
| 89, Brent Way707 m away | 89 m² | 146 m² | +57 m² +64% | 2025 |
|---|
| 78, Walmington Fold854 m away | 95 m² | 152 m² | +57 m² +60% | 2020 |
|---|
| 3, St Pauls Way359 m away | 109 m² | 165 m² | +56 m² +51% | 2023 |
|---|
| 12, Chesterfield Road649 m away | 98 m² | 154 m² | +56 m² +57% | 2019 |
|---|
| 9, Queens Road908 m away | 67 m² | 123 m² | +56 m² +84% | 2018 |
|---|
| 39, Howcroft Crescent397 m away | 96 m² | 152 m² | +56 m² +58% | 2014 |
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| 20, Hamilton Way634 m away | 98 m² | 152 m² | +54 m² +55% | 2021 |
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| 190, Nether Street482 m away | 165 m² | 218 m² | +53 m² +32% | 2025 |
|---|
| 38, Linkside945 m away | 102 m² | 155 m² | +53 m² +52% | 2024 |
|---|
| 41, Eton Avenue538 m away | 131 m² | 184 m² | +53 m² +40% | 2019 |
|---|
| 11a, Linkside909 m away | 94 m² | 147 m² | +53 m² +56% | 2015 |
|---|
| 2, The Garth976 m away | 124 m² | 177 m² | +53 m² +43% | 2014 |
|---|
| 18, Poynings Way907 m away | 174 m² | 226 m² | +52 m² +30% | 2025 |
|---|
| 3, Bow Lane792 m away | 101 m² | 153 m² | +52 m² +51% | 2018 |
|---|
| 49, Princes Avenue638 m away | 146 m² | 198 m² | +52 m² +36% | 2013 |
|---|
| 24, Saddlescombe Way944 m away | 122 m² | 173 m² | +51 m² +42% | 2025 |
|---|
| 53, Fursby Avenue518 m away | 97 m² | 148 m² | +51 m² +53% | 2020 |
|---|
| 1, Princes Avenue638 m away | 160 m² | 211 m² | +51 m² +32% | 2019 |
|---|
| 18, Courthouse Gardens399 m away | 128 m² | 178 m² | +50 m² +39% | 2023 |
|---|
| 95, Woodlands Avenue610 m away | 96 m² | 146 m² | +50 m² +52% | 2023 |
|---|
| 90, Woodlands Avenue620 m away | 98 m² | 148 m² | +50 m² +51% | 2022 |
|---|
| 31, Avondale Avenue840 m away | 154 m² | 204 m² | +50 m² +32% | 2022 |
|---|
| 682, High Road865 m away | 70 m² | 120 m² | +50 m² +71% | 2020 |
|---|
| 47, Fallow Court Avenue560 m away | 122 m² | 171 m² | +49 m² +40% | 2023 |
|---|
| 7, Queens Avenue629 m away | 113 m² | 162 m² | +49 m² +43% | 2016 |
|---|
| 86, Avondale Avenue761 m away | 120 m² | 169 m² | +49 m² +41% | 2015 |
|---|
| 75, Etchingham Park Road470 m away | 60 m² | 109 m² | +49 m² +82% | 2013 |
|---|
| 88, Queens Avenue624 m away | 113 m² | 161 m² | +48 m² +42% | 2026 |
|---|
| 10, Sussex Ring868 m away | 142 m² | 190 m² | +48 m² +34% | 2026 |
|---|
| 3, Walmington Fold790 m away | 114 m² | 162 m² | +48 m² +42% | 2025 |
|---|
| 22, Rosemont Avenue700 m away | 109 m² | 157 m² | +48 m² +44% | 2018 |
|---|
| 3, Church Path982 m away | 87 m² | 134 m² | +47 m² +54% | 2018 |
|---|
| 22, Courthouse Gardens399 m away | 181 m² | 227 m² | +46 m² +25% | 2024 |
|---|
| 1, Falkland Avenue522 m away | 153 m² | 199 m² | +46 m² +30% | 2020 |
|---|
| 32, Cornwall Avenue501 m away | 56 m² | 102 m² | +46 m² +82% | 2012 |
|---|
| 61, Wentworth Park256 m away | 123 m² | 168 m² | +45 m² +37% | 2023 |
|---|
| 45, Alexandra Grove547 m away | 121 m² | 166 m² | +45 m² +37% | 2020 |
|---|
| 50, Fursby Avenue765 m away | 102 m² | 147 m² | +45 m² +44% | 2016 |
|---|
| 242, Nether Street748 m away | 223 m² | 267 m² | +44 m² +20% | 2024 |
|---|
| 42, Addington Drive850 m away | 109 m² | 153 m² | +44 m² +40% | 2024 |
|---|
| 4, Chesterfield Road649 m away | 101 m² | 145 m² | +44 m² +44% | 2021 |
|---|
| Flat 18, 706, High Road912 m away | 53 m² | 97 m² | +44 m² +83% | 2021 |
|---|
| 14, Chislehurst Avenue351 m away | 125 m² | 169 m² | +44 m² +35% | 2020 |
|---|
| 47, Wentworth Park256 m away | 118 m² | 161 m² | +43 m² +36% | 2025 |
|---|
| 1, Chesterfield Road649 m away | 101 m² | 144 m² | +43 m² +43% | 2022 |
|---|
| 60, Gordon Road897 m away | 62 m² | 105 m² | +43 m² +69% | 2018 |
|---|
| 114, Granville Road623 m away | 63 m² | 106 m² | +43 m² +68% | 2017 |
|---|
| 29, Finchley Way678 m away | 127 m² | 170 m² | +43 m² +34% | 2015 |
|---|
| 47, Wentworth Avenue249 m away | 107 m² | 149 m² | +42 m² +39% | 2025 |
|---|
| 3, Percy Road976 m away | 51 m² | 93 m² | +42 m² +82% | 2024 |
|---|
| 38, Claverley Grove533 m away | 123 m² | 165 m² | +42 m² +34% | 2021 |
|---|
| 1, Percy Road976 m away | 50 m² | 92 m² | +42 m² +84% | 2019 |
|---|
| 160, Nether Street482 m away | 88 m² | 130 m² | +42 m² +48% | 2011 |
|---|
| 80, Walmington Fold854 m away | 98 m² | 139 m² | +41 m² +42% | 2024 |
|---|
| 23, Queens Avenue629 m away | 96 m² | 137 m² | +41 m² +43% | 2022 |
|---|
| 22, Eton Avenue559 m away | 130 m² | 171 m² | +41 m² +32% | 2020 |
|---|
| 39, Nether Street759 m away | 119 m² | 160 m² | +41 m² +34% | 2020 |
|---|
| 5, Dollis Road952 m away | 44 m² | 85 m² | +41 m² +93% | 2018 |
|---|
| 47, Cissbury Ring South981 m away | 130 m² | 170 m² | +40 m² +31% | 2024 |
|---|
| 1, Finchley Way672 m away | 177 m² | 217 m² | +40 m² +23% | 2022 |
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| 23, Avondale Avenue840 m away | 161 m² | 201 m² | +40 m² +25% | 2020 |
|---|
| 101, Hervey Close936 m away | 99 m² | 139 m² | +40 m² +40% | 2019 |
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| 29, Essex Park160 m away | 109 m² | 149 m² | +40 m² +37% | 2017 |
|---|
| 57, Long Lane759 m away | 34 m² | 74 m² | +40 m² +118% | 2015 |
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| 47, Clifton Road745 m away | 101 m² | 140 m² | +39 m² +39% | 2025 |
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| 93, Hervey Close936 m away | 95 m² | 134 m² | +39 m² +41% | 2021 |
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| 62, Churchfield Avenue890 m away | 140 m² | 179 m² | +39 m² +28% | 2017 |
|---|
| 39, Hillcourt Avenue481 m away | 191 m² | 230 m² | +39 m² +20% | 2011 |
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| 54, Percy Road987 m away | 79 m² | 117 m² | +38 m² +48% | 2026 |
|---|
| 14, Sandringham Gardens872 m away | 158 m² | 196 m² | +38 m² +24% | 2022 |
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| 9a, Chislehurst Avenue351 m away | 80 m² | 118 m² | +38 m² +48% | 2020 |
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| Flat 12, Holmdene, Holden Road988 m away | 72 m² | 110 m² | +38 m² +53% | 2018 |
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| 9, Hillcourt Avenue481 m away | 73 m² | 111 m² | +38 m² +52% | 2012 |
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| 32, Grange Avenue869 m away | 49 m² | 86 m² | +37 m² +76% | 2025 |
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| 16, Hillcourt Avenue437 m away | 101 m² | 138 m² | +37 m² +37% | 2023 |
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| 84, Linkside933 m away | 95 m² | 132 m² | +37 m² +39% | 2021 |
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| 41, Fursby Avenue518 m away | 108 m² | 145 m² | +37 m² +34% | 2019 |
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| 1, Holdenhurst Avenue441 m away | 111 m² | 148 m² | +37 m² +33% | 2018 |
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| 57, Bow Lane520 m away | 121 m² | 158 m² | +37 m² +31% | 2016 |
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| 26, Cornwall Avenue501 m away | 139 m² | 176 m² | +37 m² +27% | 2013 |
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| 6, Linkside945 m away | 108 m² | 145 m² | +37 m² +34% | 2013 |
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| 13, Dickens Avenue906 m away | 34 m² | 70 m² | +36 m² +106% | 2026 |
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| 8, Derby Avenue886 m away | 98 m² | 134 m² | +36 m² +37% | 2022 |
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| 12, St Pauls Way359 m away | 108 m² | 144 m² | +36 m² +33% | 2020 |
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| 11, Woodlands Avenue610 m away | 61 m² | 97 m² | +36 m² +59% | 2018 |
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| 37, Linkside909 m away | 112 m² | 148 m² | +36 m² +32% | 2016 |
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| 29, Linkside909 m away | 103 m² | 139 m² | +36 m² +35% | 2015 |
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| 142, Long Lane786 m away | 41 m² | 77 m² | +36 m² +88% | 2011 |
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| 35, Hillcourt Avenue481 m away | 149 m² | 184 m² | +35 m² +23% | 2026 |
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| 8, Holdenhurst Avenue389 m away | 94 m² | 129 m² | +35 m² +37% | 2025 |
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| 46, Queens Avenue624 m away | 54 m² | 89 m² | +35 m² +65% | 2025 |
|---|
| 16a, Gruneisen Road161 m away | 57 m² | 92 m² | +35 m² +61% | 2023 |
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| 18, Hamilton Way634 m away | 112 m² | 147 m² | +35 m² +31% | 2022 |
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| 85, Etchingham Park Road470 m away | 137 m² | 172 m² | +35 m² +26% | 2021 |
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| 27, Hillcourt Avenue481 m away | 114 m² | 149 m² | +35 m² +31% | 2020 |
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| 27a, Holden Road938 m away | 53 m² | 88 m² | +35 m² +66% | 2015 |
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| 4, Lansdowne Road752 m away | 116 m² | 151 m² | +35 m² +30% | 2013 |
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| 87, Sandringham Gardens976 m away | 111 m² | 145 m² | +34 m² +31% | 2026 |
|---|
| 26, Nethercourt Avenue532 m away | 105 m² | 139 m² | +34 m² +32% | 2019 |
|---|
| Flat 33, Etchingham Court, Etchingham Park Road275 m away | 41 m² | 75 m² | +34 m² +83% | 2018 |
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| 17, Wentworth Avenue391 m away | 106 m² | 140 m² | +34 m² +32% | 2014 |
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| 13, Westbury Road880 m away | 206 m² | 240 m² | +34 m² +17% | 2014 |
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| Flat 24, Kings Lodge, Kingsway729 m away | 44 m² | 77 m² | +33 m² +75% | 2026 |
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| 24, Vines Avenue651 m away | 103 m² | 136 m² | +33 m² +32% | 2023 |
|---|
| 26, Walmington Fold868 m away | 135 m² | 168 m² | +33 m² +24% | 2021 |
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| 26, Queens Avenue624 m away | 111 m² | 144 m² | +33 m² +30% | 2019 |
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| 63, Woodlands Avenue610 m away | 112 m² | 145 m² | +33 m² +29% | 2018 |
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| 55, Sandringham Gardens917 m away | 48 m² | 81 m² | +33 m² +69% | 2013 |
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| 31, Wentworth Avenue391 m away | 109 m² | 142 m² | +33 m² +30% | 2012 |
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| 99, Walmington Fold817 m away | 105 m² | 137 m² | +32 m² +30% | 2020 |
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| 36, Avondale Avenue761 m away | 159 m² | 191 m² | +32 m² +20% | 2017 |
|---|
| 18a, Brownlow Road126 m away | 55 m² | 86 m² | +31 m² +56% | 2023 |
|---|
| 84, Queens Avenue624 m away | 111 m² | 142 m² | +31 m² +28% | 2023 |
|---|
| 5, Hervey Close852 m away | 169 m² | 200 m² | +31 m² +18% | 2021 |
|---|
| 9, Linkside909 m away | 94 m² | 125 m² | +31 m² +33% | 2020 |
|---|
| 47, West Avenue551 m away | 112 m² | 142 m² | +30 m² +27% | 2026 |
|---|
| 65, Grange Avenue905 m away | 74 m² | 104 m² | +30 m² +41% | 2023 |
|---|
| 16, Westbury Grove561 m away | 103 m² | 133 m² | +30 m² +29% | 2014 |
|---|
| 30, Fallow Court Avenue554 m away | 134 m² | 163 m² | +29 m² +22% | 2025 |
|---|
| 49, Grange Avenue869 m away | 66 m² | 95 m² | +29 m² +44% | 2023 |
|---|
| 44, Elm Park Road932 m away | 66 m² | 95 m² | +29 m² +44% | 2022 |
|---|
| 234a, Nether Street748 m away | 90 m² | 119 m² | +29 m² +32% | 2021 |
|---|
| 36a, Queens Avenue624 m away | 52 m² | 81 m² | +29 m² +56% | 2020 |
|---|
| 78a, Westbury Road650 m away | 76 m² | 105 m² | +29 m² +38% | 2020 |
|---|
| 36, Claverley Grove533 m away | 118 m² | 147 m² | +29 m² +25% | 2019 |
|---|
| 92, Long Lane786 m away | 34 m² | 63 m² | +29 m² +85% | 2017 |
|---|
| 36, Eton Avenue559 m away | 157 m² | 185 m² | +28 m² +18% | 2024 |
|---|
| 25, Oakfield Road766 m away | 129 m² | 157 m² | +28 m² +22% | 2024 |
|---|
| 3, Station Close974 m away | 45 m² | 73 m² | +28 m² +62% | 2022 |
|---|
| 55, Grange Avenue869 m away | 41 m² | 68 m² | +27 m² +66% | 2023 |
|---|
| 51, Sandringham Gardens917 m away | 104 m² | 131 m² | +27 m² +26% | 2020 |
|---|
| 22, Hamilton Square768 m away | 65 m² | 92 m² | +27 m² +42% | 2018 |
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| 22a, Woodlands Avenue620 m away | 51 m² | 78 m² | +27 m² +53% | 2016 |
|---|
| 3, Thyra Grove375 m away | 97 m² | 124 m² | +27 m² +28% | 2012 |
|---|
| Flat 1, 728, High Road942 m away | 23 m² | 50 m² | +27 m² +117% | 2012 |
|---|
| 18, Gainsborough Road852 m away | 65 m² | 91 m² | +26 m² +40% | 2024 |
|---|
| 40, Moss Hall Grove366 m away | 139 m² | 165 m² | +26 m² +19% | 2023 |
|---|
| 31, Sandringham Gardens917 m away | 139 m² | 165 m² | +26 m² +19% | 2023 |
|---|
| Cintra, Holden Road953 m away | 102 m² | 128 m² | +26 m² +25% | 2023 |
|---|
| 52, Queens Avenue624 m away | 122 m² | 148 m² | +26 m² +21% | 2015 |
|---|
| 3, Saddlescombe Way944 m away | 111 m² | 137 m² | +26 m² +23% | 2013 |
|---|
| 54, Dollis Road993 m away | 67 m² | 93 m² | +26 m² +39% | 2012 |
|---|