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 HA0 4HQ
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 |
|---|---|---|---|---|
| 10, Union Road884 m away | 107 m² | 219 m² | +112 m² +105% | 2024 |
| 17, Bovingdon Avenue863 m away | 89 m² | 186 m² | +97 m² +109% | 2020 |
| 78, Ealing Road798 m away | 121 m² | 208 m² | +87 m² +72% | 2024 |
| 14, Thurlby Road959 m away | 130 m² | 213 m² | +83 m² +64% | 2022 |
| 2, Woodside End524 m away | 100 m² | 172 m² | +72 m² +72% | 2021 |
| 3, Bowrons Avenue715 m away | 139 m² | 204 m² | +65 m² +47% | 2026 |
| 20, Woodstock Road83 m away | 97 m² | 160 m² | +63 m² +65% | 2018 |
| 4, The Close664 m away | 96 m² | 157 m² | +61 m² +64% | 2025 |
| 19, St Michaels Avenue997 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.
| 145 m² |
| +61 m² +73% |
| 2021 |
| 4, Victoria Court983 m away | 95 m² | 156 m² | +61 m² +64% | 2017 |
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| Flat 16, Affinity House, 84, Beresford Avenue468 m away | 54 m² | 112 m² | +58 m² +107% | 2022 |
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| 10, Kathleen Avenue364 m away | 93 m² | 151 m² | +58 m² +62% | 2016 |
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| Flat 10, Celeste House, 4, Belgrave Road497 m away | 54 m² | 110 m² | +56 m² +104% | 2022 |
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| 24, Bowrons Avenue717 m away | 140 m² | 196 m² | +56 m² +40% | 2020 |
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| 22, Flamsted Avenue817 m away | 129 m² | 184 m² | +55 m² +43% | 2026 |
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| 182, Harrow Road907 m away | 50 m² | 105 m² | +55 m² +110% | 2018 |
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| Flat 31, Affinity House, 84, Beresford Avenue468 m away | 52 m² | 106 m² | +54 m² +104% | 2022 |
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| 146, London Road744 m away | 51 m² | 105 m² | +54 m² +106% | 2017 |
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| Flat 47, Affinity House, 84, Beresford Avenue468 m away | 53 m² | 106 m² | +53 m² +100% | 2022 |
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| Flat 50, Affinity House, 84, Beresford Avenue468 m away | 54 m² | 107 m² | +53 m² +98% | 2022 |
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| 45, Braemar Avenue664 m away | 103 m² | 154 m² | +51 m² +50% | 2017 |
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| Flat 25, Celeste House, 4, Belgrave Road497 m away | 54 m² | 104 m² | +50 m² +93% | 2022 |
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| Flat 40, Celeste House, 4, Belgrave Road497 m away | 54 m² | 104 m² | +50 m² +93% | 2022 |
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| 6, Lyon Park Avenue688 m away | 50 m² | 100 m² | +50 m² +100% | 2019 |
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| 27, The Grange406 m away | 84 m² | 133 m² | +49 m² +58% | 2023 |
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| 2, Wigginton Avenue913 m away | 103 m² | 152 m² | +49 m² +48% | 2022 |
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| 99, Swinderby Road792 m away | 141 m² | 189 m² | +48 m² +34% | 2016 |
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| 22, Rowley Close249 m away | 92 m² | 139 m² | +47 m² +51% | 2021 |
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| 208, Harrow Road938 m away | 44 m² | 90 m² | +46 m² +105% | 2021 |
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| 64, London Road744 m away | 132 m² | 177 m² | +45 m² +34% | 2019 |
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| 4, Lightley Close267 m away | 72 m² | 117 m² | +45 m² +63% | 2018 |
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| 46, Clayton Avenue412 m away | 60 m² | 104 m² | +44 m² +73% | 2022 |
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| 79b, Eagle Road882 m away | 36 m² | 77 m² | +41 m² +114% | 2025 |
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| 1a, Park Road796 m away | 48 m² | 89 m² | +41 m² +85% | 2024 |
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| Flat 48, Affinity House, 84, Beresford Avenue468 m away | 41 m² | 82 m² | +41 m² +100% | 2022 |
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| 11, Highmead Crescent256 m away | 62 m² | 103 m² | +41 m² +66% | 2020 |
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| Flat 13, Affinity House, 84, Beresford Avenue468 m away | 66 m² | 106 m² | +40 m² +61% | 2022 |
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| 10, Bridgewater Road977 m away | 41 m² | 81 m² | +40 m² +98% | 2012 |
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| Flat 21, Affinity House, 84, Beresford Avenue468 m away | 43 m² | 82 m² | +39 m² +91% | 2022 |
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| 123, Swinderby Road792 m away | 131 m² | 170 m² | +39 m² +30% | 2018 |
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| 6, Clayton Avenue460 m away | 88 m² | 126 m² | +38 m² +43% | 2026 |
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| 149, Tokyngton Avenue775 m away | 94 m² | 132 m² | +38 m² +40% | 2023 |
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| Flat 52, Celeste House, 4, Belgrave Road497 m away | 66 m² | 104 m² | +38 m² +58% | 2022 |
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| 39, Douglas Avenue550 m away | 101 m² | 139 m² | +38 m² +38% | 2021 |
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| 8, Sunleigh Court, Mount Pleasant565 m away | 54 m² | 91 m² | +37 m² +69% | 2022 |
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| 11, Nettleden Avenue786 m away | 121 m² | 157 m² | +36 m² +30% | 2023 |
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| 20, Rowley Close249 m away | 79 m² | 115 m² | +36 m² +46% | 2016 |
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| 67, Jesmond Avenue817 m away | 89 m² | 125 m² | +36 m² +40% | 2016 |
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| 6, Park Road769 m away | 114 m² | 149 m² | +35 m² +31% | 2017 |
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| 35, Westbury Road464 m away | 67 m² | 101 m² | +34 m² +51% | 2026 |
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| 58, Queensbury Road716 m away | 70 m² | 104 m² | +34 m² +49% | 2021 |
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| Flat 34, Affinity House, 84, Beresford Avenue468 m away | 41 m² | 74 m² | +33 m² +80% | 2022 |
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| Flat 18, Affinity House, 84, Beresford Avenue468 m away | 41 m² | 74 m² | +33 m² +80% | 2022 |
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| Flat 15, Affinity House, 84, Beresford Avenue468 m away | 41 m² | 74 m² | +33 m² +80% | 2022 |
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| Flat 4, Affinity House, 84, Beresford Avenue468 m away | 41 m² | 74 m² | +33 m² +80% | 2022 |
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| Flat 8, Affinity House, 84, Beresford Avenue468 m away | 41 m² | 74 m² | +33 m² +80% | 2022 |
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| 7, Belmont Avenue221 m away | 97 m² | 130 m² | +33 m² +34% | 2021 |
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| 44, Swinderby Road901 m away | 73 m² | 106 m² | +33 m² +45% | 2019 |
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| Flat 37, Affinity House, 84, Beresford Avenue468 m away | 74 m² | 106 m² | +32 m² +43% | 2022 |
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| Flat 27, Affinity House, 84, Beresford Avenue468 m away | 74 m² | 106 m² | +32 m² +43% | 2022 |
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| 8, Thurlby Road959 m away | 87 m² | 119 m² | +32 m² +37% | 2016 |
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| 5, Cecil Avenue968 m away | 110 m² | 141 m² | +31 m² +28% | 2026 |
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| 21, Park Road796 m away | 39 m² | 70 m² | +31 m² +79% | 2023 |
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| Flat 45, Affinity House, 84, Beresford Avenue468 m away | 43 m² | 74 m² | +31 m² +72% | 2022 |
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| 226, Tokyngton Avenue720 m away | 77 m² | 108 m² | +31 m² +40% | 2015 |
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| 10, Tylers Court, Vicars Bridge Close869 m away | 30 m² | 61 m² | +31 m² +103% | 2008 |
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| 192a, Ealing Road590 m away | 100 m² | 130 m² | +30 m² +30% | 2023 |
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| 150, Harrow Road951 m away | 90 m² | 120 m² | +30 m² +33% | 2023 |
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| Flat 16, Celeste House, 4, Belgrave Road497 m away | 74 m² | 104 m² | +30 m² +41% | 2022 |
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| Flat 46, Celeste House, 4, Belgrave Road497 m away | 74 m² | 104 m² | +30 m² +41% | 2022 |
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| Flat 34, Celeste House, 4, Belgrave Road497 m away | 74 m² | 104 m² | +30 m² +41% | 2022 |
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| 25a, Stanley Avenue407 m away | 47 m² | 77 m² | +30 m² +64% | 2017 |
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| 78, London Road744 m away | 106 m² | 136 m² | +30 m² +28% | 2015 |
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| 9, St Michaels Avenue997 m away | 100 m² | 129 m² | +29 m² +29% | 2024 |
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| 57, Mount Pleasant285 m away | 77 m² | 106 m² | +29 m² +38% | 2021 |
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| 53, Crabtree Avenue779 m away | 58 m² | 87 m² | +29 m² +50% | 2019 |
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| 63, Ealing Road673 m away | 181 m² | 209 m² | +28 m² +15% | 2023 |
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| Flat 33, Affinity House, 84, Beresford Avenue468 m away | 54 m² | 82 m² | +28 m² +52% | 2022 |
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| 68, Brentvale Avenue603 m away | 57 m² | 85 m² | +28 m² +49% | 2020 |
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| 27b, Stapleford Road995 m away | 56 m² | 84 m² | +28 m² +50% | 2016 |
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| 41, Bamford Avenue647 m away | 62 m² | 90 m² | +28 m² +45% | 2013 |
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| 70, Fulwood Avenue714 m away | 37 m² | 64 m² | +27 m² +73% | 2024 |
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| 1, Braemar Avenue664 m away | 61 m² | 88 m² | +27 m² +44% | 2022 |
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| Premier House, 45, Ealing Road836 m away | 19 m² | 46 m² | +27 m² +142% | 2020 |
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| 73, Thurlby Road928 m away | 30 m² | 57 m² | +27 m² +90% | 2014 |
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| 62a, Heather Park Drive552 m away | 45 m² | 71 m² | +26 m² +58% | 2024 |
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| 5, Craigmuir Park344 m away | 80 m² | 106 m² | +26 m² +33% | 2022 |
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| 50, Brentvale Avenue603 m away | 68 m² | 94 m² | +26 m² +38% | 2021 |
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| 20, Flamsted Avenue817 m away | 146 m² | 172 m² | +26 m² +18% | 2018 |
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| 40, Bowrons Avenue717 m away | 112 m² | 138 m² | +26 m² +23% | 2016 |
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| Flat 28, Anne Carver Lodge, Stanley Avenue275 m away | 40 m² | 65 m² | +25 m² +63% | 2026 |
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| 61, Thurlby Road928 m away | 118 m² | 143 m² | +25 m² +21% | 2023 |
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| 22a, Braemar Avenue680 m away | 51 m² | 76 m² | +25 m² +49% | 2020 |
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| 102a, Ealing Road798 m away | 61 m² | 85 m² | +24 m² +39% | 2023 |
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| 38, Crabtree Avenue764 m away | 57 m² | 81 m² | +24 m² +42% | 2010 |
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| 25, Bowrons Avenue715 m away | 118 m² | 141 m² | +23 m² +19% | 2026 |
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| 39, Berkhamsted Avenue781 m away | 116 m² | 139 m² | +23 m² +20% | 2020 |
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| 65, Bamford Avenue647 m away | 58 m² | 81 m² | +23 m² +40% | 2014 |
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| Flat 34, Fairbanks Court, Atlip Road681 m away | 66 m² | 88 m² | +22 m² +33% | 2021 |
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| 47, Crabtree Avenue779 m away | 63 m² | 85 m² | +22 m² +35% | 2021 |
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| 67, Lyon Park Avenue497 m away | 29 m² | 51 m² | +22 m² +76% | 2017 |
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| Flat 21, Aylesbury House, Hatton Road814 m away | 51 m² | 72 m² | +21 m² +41% | 2026 |
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| 49, Jesmond Avenue817 m away | 115 m² | 136 m² | +21 m² +18% | 2026 |
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| Flat 32, Cosgrove House, Hatton Road874 m away | 39 m² | 60 m² | +21 m² +54% | 2024 |
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| 5 Allium House, 2, Caldon Boulevard524 m away | 54 m² | 75 m² | +21 m² +39% | 2023 |
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| 1, Claverack House, Lyon Park Avenue740 m away | 52 m² | 73 m² | +21 m² +40% | 2023 |
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| 30, Kenmere Gardens467 m away | 29 m² | 50 m² | +21 m² +72% | 2020 |
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| 25, Thurlby Road928 m away | 88 m² | 109 m² | +21 m² +24% | 2018 |
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| 58, Carlyon Road654 m away | 68 m² | 89 m² | +21 m² +31% | 2016 |
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| 98a, Lonsdale Avenue866 m away | 41 m² | 62 m² | +21 m² +51% | 2016 |
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| 53, Douglas Avenue589 m away | 78 m² | 99 m² | +21 m² +27% | 2013 |
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| 13, Lonsdale Avenue973 m away | 90 m² | 110 m² | +20 m² +22% | 2025 |
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| 12, Rowley Close249 m away | 80 m² | 100 m² | +20 m² +25% | 2023 |
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| 5, Valley Gardens311 m away | 71 m² | 91 m² | +20 m² +28% | 2022 |
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| 15b, Berkhamsted Avenue781 m away | 36 m² | 56 m² | +20 m² +56% | 2020 |
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| Flat 31, Celeste House, 4, Belgrave Road497 m away | 54 m² | 73 m² | +19 m² +35% | 2022 |
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| 82a, London Road744 m away | 73 m² | 92 m² | +19 m² +26% | 2020 |
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| 8a, Scarle Road931 m away | 58 m² | 77 m² | +19 m² +33% | 2020 |
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| 160a, London Road744 m away | 71 m² | 90 m² | +19 m² +27% | 2016 |
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| 107, Carlyon Road467 m away | 61 m² | 80 m² | +19 m² +31% | 2015 |
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| 43, London Road833 m away | 112 m² | 130 m² | +18 m² +16% | 2026 |
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| 19a, Kenmere Gardens441 m away | 37 m² | 55 m² | +18 m² +49% | 2025 |
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| Flat 54, Marsworth House, Hatton Road776 m away | 55 m² | 73 m² | +18 m² +33% | 2025 |
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| 16, Westbury Avenue541 m away | 91 m² | 109 m² | +18 m² +20% | 2023 |
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| 144, Harrow Road951 m away | 85 m² | 103 m² | +18 m² +21% | 2022 |
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| 30, Eagle Road796 m away | 54 m² | 72 m² | +18 m² +33% | 2021 |
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| 33, Norwood Avenue687 m away | 61 m² | 78 m² | +17 m² +28% | 2026 |
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| 11, Waverley Avenue938 m away | 100 m² | 117 m² | +17 m² +17% | 2026 |
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| 76, Scarle Road818 m away | 99 m² | 116 m² | +17 m² +17% | 2025 |
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| 59, Hillfield Avenue225 m away | 93 m² | 110 m² | +17 m² +18% | 2022 |
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| 19, Hurst Lodge, Stanley Avenue144 m away | 49 m² | 66 m² | +17 m² +35% | 2021 |
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| 146a, Heather Park Drive348 m away | 56 m² | 73 m² | +17 m² +30% | 2019 |
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| 257a, Harrow Road916 m away | 40 m² | 57 m² | +17 m² +43% | 2019 |
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| 1, St James Gardens699 m away | 111 m² | 128 m² | +17 m² +15% | 2010 |
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| 224a, Ealing Road550 m away | 51 m² | 67 m² | +16 m² +31% | 2026 |
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| 34, Kathleen Avenue364 m away | 90 m² | 106 m² | +16 m² +18% | 2024 |
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| Flat 12, Fairbanks Court, Atlip Road681 m away | 62 m² | 78 m² | +16 m² +26% | 2021 |
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| Flat 24, Fairbanks Court, Atlip Road681 m away | 66 m² | 82 m² | +16 m² +24% | 2021 |
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| 21a, Heather Park Drive434 m away | 47 m² | 63 m² | +16 m² +34% | 2020 |
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| Flat 4, 99 - 103, Ealing Road576 m away | 50 m² | 66 m² | +16 m² +32% | 2019 |
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| 220, Tokyngton Avenue720 m away | 79 m² | 95 m² | +16 m² +20% | 2019 |
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| Flat 24, Laurel Court, Vicars Bridge Close895 m away | 25 m² | 41 m² | +16 m² +64% | 2018 |
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| 3a, Heather Park Parade298 m away | 46 m² | 62 m² | +16 m² +35% | 2017 |
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| 8, Chatsworth Avenue995 m away | 85 m² | 101 m² | +16 m² +19% | 2017 |
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| 63a, Beresford Avenue583 m away | 42 m² | 57 m² | +15 m² +36% | 2025 |
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| 58, Brentvale Avenue603 m away | 67 m² | 82 m² | +15 m² +22% | 2025 |
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| 23a, Lonsdale Avenue880 m away | 41 m² | 56 m² | +15 m² +37% | 2025 |
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| 10a, Berkhamsted Avenue758 m away | 83 m² | 98 m² | +15 m² +18% | 2022 |
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| 85, Harrow Road983 m away | 93 m² | 108 m² | +15 m² +16% | 2020 |
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| 112, Ealing Road798 m away | 30 m² | 45 m² | +15 m² +50% | 2008 |
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