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 UB1 3JB
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 |
|---|---|---|---|---|
| 21, Masefield Avenue140 m away | 104 m² | 232 m² | +128 m² +123% | 2014 |
| 67, West Avenue867 m away | 73 m² | 181 m² | +108 m² +148% | 2021 |
| 22, Green Drive765 m away | 113 m² | 212 m² | +99 m² +88% | 2024 |
| 314, Lady Margaret Road802 m away | 93 m² | 186 m² | +93 m² +100% | 2025 |
| 7, Greenford Avenue844 m away | 159 m² | 250 m² | +91 m² +57% | 2023 |
| 80, Lady Margaret Road631 m away | 92 m² | 173 m² | +81 m² +88% | 2026 |
| 54, Allendale Avenue473 m away | 67 m² | 148 m² | +81 m² +121% | 2024 |
| 104, Somerset Road695 m away | 72 m² | 152 m² | +80 m² +111% | 2021 |
| 14, Waxlow Crescent309 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.
| 92 m² |
| 171 m² |
| +79 m² +86% |
| 2026 |
| 8, Lady Margaret Road765 m away | 65 m² | 139 m² | +74 m² +114% | 2011 |
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| 21, Knowsley Avenue859 m away | 83 m² | 156 m² | +73 m² +88% | 2026 |
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| 28, Alexandra Avenue966 m away | 80 m² | 151 m² | +71 m² +89% | 2026 |
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| 229, Park Avenue969 m away | 116 m² | 183 m² | +67 m² +58% | 2026 |
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| 127, Hurley Road828 m away | 83 m² | 150 m² | +67 m² +81% | 2022 |
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| 6, Longridge Lane496 m away | 98 m² | 163 m² | +65 m² +66% | 2026 |
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| 117, Allenby Road409 m away | 78 m² | 138 m² | +60 m² +77% | 2022 |
|---|
| 9, Knowsley Avenue859 m away | 90 m² | 148 m² | +58 m² +64% | 2024 |
|---|
| 26, Bycroft Road975 m away | 65 m² | 122 m² | +57 m² +88% | 2023 |
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| 18, South Avenue852 m away | 65 m² | 120 m² | +55 m² +85% | 2026 |
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| 5, Greenford Avenue844 m away | 91 m² | 146 m² | +55 m² +60% | 2015 |
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| 191, Park Avenue970 m away | 72 m² | 126 m² | +54 m² +75% | 2017 |
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| 86, Queens Avenue732 m away | 42 m² | 96 m² | +54 m² +129% | 2014 |
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| 9, East Avenue773 m away | 56 m² | 109 m² | +53 m² +95% | 2025 |
|---|
| 8, The Grove737 m away | 85 m² | 137 m² | +52 m² +61% | 2025 |
|---|
| 54, Lady Margaret Road692 m away | 146 m² | 198 m² | +52 m² +36% | 2019 |
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| 37b, Dormers Wells Lane368 m away | 131 m² | 183 m² | +52 m² +40% | 2013 |
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| 47, Burns Avenue280 m away | 37 m² | 88 m² | +51 m² +138% | 2025 |
|---|
| 23, Telford Road284 m away | 75 m² | 126 m² | +51 m² +68% | 2025 |
|---|
| 71, Greenford Avenue679 m away | 65 m² | 116 m² | +51 m² +78% | 2025 |
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| 79, Somerset Road672 m away | 83 m² | 133 m² | +50 m² +60% | 2026 |
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| 2, Denbigh Road552 m away | 80 m² | 129 m² | +49 m² +61% | 2023 |
|---|
| 2a, Kings Avenue763 m away | 57 m² | 106 m² | +49 m² +86% | 2014 |
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| 228, Lady Margaret Road619 m away | 71 m² | 119 m² | +48 m² +68% | 2026 |
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| 161, North Road234 m away | 85 m² | 132 m² | +47 m² +55% | 2025 |
|---|
| 33, Allendale Avenue379 m away | 82 m² | 129 m² | +47 m² +57% | 2025 |
|---|
| 111, Lady Margaret Road626 m away | 100 m² | 147 m² | +47 m² +47% | 2025 |
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| 45, Carlyle Avenue635 m away | 90 m² | 136 m² | +46 m² +51% | 2026 |
|---|
| 55, Kenton Avenue298 m away | 107 m² | 152 m² | +45 m² +42% | 2026 |
|---|
| 113, Kings Avenue447 m away | 92 m² | 137 m² | +45 m² +49% | 2026 |
|---|
| 6, Evelyn Grove665 m away | 84 m² | 129 m² | +45 m² +54% | 2026 |
|---|
| 44, Carlyle Avenue474 m away | 89 m² | 134 m² | +45 m² +51% | 2022 |
|---|
| 23, Ferndown Court, Haldane Road689 m away | 71 m² | 114 m² | +43 m² +61% | 2014 |
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| 4, Telford Road284 m away | 88 m² | 130 m² | +42 m² +48% | 2026 |
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| 138, Allenby Road380 m away | 76 m² | 118 m² | +42 m² +55% | 2026 |
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| 3, Boyd Avenue872 m away | 77 m² | 119 m² | +42 m² +55% | 2024 |
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| 53, Cranleigh Gardens802 m away | 57 m² | 99 m² | +42 m² +74% | 2020 |
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| 42, Masefield Avenue122 m away | 95 m² | 137 m² | +42 m² +44% | 2019 |
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| 33, Wallis Road329 m away | 43 m² | 85 m² | +42 m² +98% | 2014 |
|---|
| 21, Argyll Avenue783 m away | 101 m² | 143 m² | +42 m² +42% | 2013 |
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| 4, Bycroft Road975 m away | 100 m² | 141 m² | +41 m² +41% | 2025 |
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| 31, St Ursula Road433 m away | 80 m² | 121 m² | +41 m² +51% | 2016 |
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| 144, Lady Margaret Road559 m away | 105 m² | 145 m² | +40 m² +38% | 2021 |
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| 8, Stratton Gardens500 m away | 73 m² | 112 m² | +39 m² +53% | 2023 |
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| 13, Ferndown Court, Haldane Road689 m away | 69 m² | 108 m² | +39 m² +57% | 2014 |
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| 110, Burns Avenue255 m away | 50 m² | 89 m² | +39 m² +78% | 2013 |
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| 5, East Avenue773 m away | 67 m² | 105 m² | +38 m² +57% | 2024 |
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| 30, Darwin Drive479 m away | 82 m² | 119 m² | +37 m² +45% | 2025 |
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| 92, North Road506 m away | 129 m² | 166 m² | +37 m² +29% | 2025 |
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| 97, Lovell Road328 m away | 117 m² | 154 m² | +37 m² +32% | 2024 |
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| 5, Sunnycroft Road899 m away | 73 m² | 110 m² | +37 m² +51% | 2023 |
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| 26, Shackleton Road564 m away | 137 m² | 174 m² | +37 m² +27% | 2020 |
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| 252, Allenby Road913 m away | 28 m² | 65 m² | +37 m² +132% | 2014 |
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| 45, Mount Avenue188 m away | 82 m² | 118 m² | +36 m² +44% | 2024 |
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| 36, Swan Road396 m away | 100 m² | 135 m² | +35 m² +35% | 2025 |
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| 17a, Waxlow Crescent309 m away | 77 m² | 112 m² | +35 m² +45% | 2020 |
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| 195, Allenby Road635 m away | 78 m² | 112 m² | +34 m² +44% | 2026 |
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| 66, Oakwood Avenue435 m away | 87 m² | 121 m² | +34 m² +39% | 2020 |
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| 20, The Grove737 m away | 85 m² | 119 m² | +34 m² +40% | 2017 |
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| 46, West Avenue867 m away | 97 m² | 131 m² | +34 m² +35% | 2013 |
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| 205, North Road170 m away | 68 m² | 101 m² | +33 m² +49% | 2026 |
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| 8, Mount Avenue188 m away | 103 m² | 136 m² | +33 m² +32% | 2025 |
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| 24, Shelley Crescent426 m away | 80 m² | 113 m² | +33 m² +41% | 2019 |
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| 22, Durdans Road489 m away | 85 m² | 118 m² | +33 m² +39% | 2019 |
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| 1, Turing Court, Lovell Road402 m away | 51 m² | 84 m² | +33 m² +65% | 2017 |
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| 297, Lady Margaret Road839 m away | 153 m² | 186 m² | +33 m² +22% | 2014 |
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| 13, Darwin Drive475 m away | 40 m² | 72 m² | +32 m² +80% | 2024 |
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| 14, Masefield Avenue140 m away | 90 m² | 122 m² | +32 m² +36% | 2015 |
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| 12, Derwent Road559 m away | 87 m² | 118 m² | +31 m² +36% | 2024 |
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| 1a, Cornwall Avenue299 m away | 38 m² | 69 m² | +31 m² +82% | 2009 |
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| 189, North Road170 m away | 93 m² | 123 m² | +30 m² +32% | 2021 |
|---|
| 222a, Allenby Road913 m away | 96 m² | 126 m² | +30 m² +31% | 2015 |
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| 71, Carlyle Avenue742 m away | 68 m² | 97 m² | +29 m² +43% | 2022 |
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| 2, Mornington Road971 m away | 101 m² | 130 m² | +29 m² +29% | 2022 |
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| 16, Thurlestone Court, Howard Road636 m away | 45 m² | 74 m² | +29 m² +64% | 2021 |
|---|
| 102, Lovell Road328 m away | 88 m² | 117 m² | +29 m² +33% | 2014 |
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| 28, North Road659 m away | 97 m² | 125 m² | +28 m² +29% | 2024 |
|---|
| 149, Kings Avenue466 m away | 116 m² | 144 m² | +28 m² +24% | 2021 |
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| 187, Allenby Road635 m away | 68 m² | 96 m² | +28 m² +41% | 2021 |
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| 31, Telford Road284 m away | 71 m² | 99 m² | +28 m² +39% | 2014 |
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| 143, Northcote Avenue905 m away | 92 m² | 120 m² | +28 m² +30% | 2013 |
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| 24, Kingsley Avenue440 m away | 128 m² | 155 m² | +27 m² +21% | 2024 |
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| 76, Lovell Road328 m away | 104 m² | 131 m² | +27 m² +26% | 2022 |
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| 42, Allendale Avenue458 m away | 63 m² | 90 m² | +27 m² +43% | 2021 |
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| 205, Park Avenue977 m away | 129 m² | 156 m² | +27 m² +21% | 2020 |
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| 32, Knowsley Avenue859 m away | 111 m² | 138 m² | +27 m² +24% | 2014 |
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| 1, Farnham Court, Redcroft Road806 m away | 76 m² | 103 m² | +27 m² +36% | 2012 |
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| 16, Princes Avenue585 m away | 67 m² | 94 m² | +27 m² +40% | 2011 |
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| 251, Lady Margaret Road672 m away | 30 m² | 56 m² | +26 m² +87% | 2026 |
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| 5, Astha Court, Kings Avenue874 m away | 84 m² | 110 m² | +26 m² +31% | 2026 |
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| 53, Hurley Road705 m away | 85 m² | 111 m² | +26 m² +31% | 2025 |
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| 66, Queens Avenue732 m away | 85 m² | 111 m² | +26 m² +31% | 2025 |
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| 109, Northcote Avenue935 m away | 85 m² | 111 m² | +26 m² +31% | 2024 |
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| 21, Viking Road997 m away | 81 m² | 107 m² | +26 m² +32% | 2024 |
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| 18, Mount Avenue188 m away | 91 m² | 117 m² | +26 m² +29% | 2020 |
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| 55, Rutland Road840 m away | 61 m² | 87 m² | +26 m² +43% | 2018 |
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| 15, St Stephens Close547 m away | 71 m² | 97 m² | +26 m² +37% | 2015 |
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| 55, Wallis Road329 m away | 59 m² | 85 m² | +26 m² +44% | 2014 |
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| 29, Rutland Road731 m away | 77 m² | 102 m² | +25 m² +32% | 2025 |
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| 194, Kings Avenue466 m away | 61 m² | 86 m² | +25 m² +41% | 2010 |
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| 11, Panhard Place435 m away | 129 m² | 153 m² | +24 m² +19% | 2025 |
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| 14, Barbican Road610 m away | 45 m² | 69 m² | +24 m² +53% | 2024 |
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| 16, Sunnycroft Road899 m away | 87 m² | 111 m² | +24 m² +28% | 2024 |
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| 41, Dormers Wells Lane368 m away | 129 m² | 153 m² | +24 m² +19% | 2020 |
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| 119, Dormers Wells Lane185 m away | 77 m² | 101 m² | +24 m² +31% | 2019 |
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| 34, Longridge Lane496 m away | 72 m² | 96 m² | +24 m² +33% | 2014 |
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| 37, Shackleton Road626 m away | 130 m² | 153 m² | +23 m² +18% | 2025 |
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| 15, Purcell Road927 m away | 111 m² | 134 m² | +23 m² +21% | 2025 |
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| 32, Shelley Crescent426 m away | 42 m² | 65 m² | +23 m² +55% | 2019 |
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| 312, Lady Margaret Road802 m away | 88 m² | 110 m² | +22 m² +25% | 2025 |
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| 67, Allenby Road214 m away | 110 m² | 132 m² | +22 m² +20% | 2022 |
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| 13, Kenton Avenue299 m away | 55 m² | 77 m² | +22 m² +40% | 2022 |
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| 2, Disley Court, Howard Road567 m away | 75 m² | 97 m² | +22 m² +29% | 2021 |
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| 106, Uxbridge Road681 m away | 60 m² | 82 m² | +22 m² +37% | 2021 |
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| 238, Allenby Road913 m away | 78 m² | 100 m² | +22 m² +28% | 2021 |
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| 8, Edison Drive455 m away | 82 m² | 104 m² | +22 m² +27% | 2013 |
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| 5, Hart Grove764 m away | 63 m² | 85 m² | +22 m² +35% | 2013 |
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| 8, Spikes Bridge Road958 m away | 77 m² | 99 m² | +22 m² +29% | 2013 |
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| 32, Spikes Bridge Road958 m away | 98 m² | 119 m² | +21 m² +21% | 2026 |
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| 47, Oakwood Avenue435 m away | 78 m² | 99 m² | +21 m² +27% | 2023 |
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| 17, Bassett Way577 m away | 80 m² | 101 m² | +21 m² +26% | 2014 |
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| 1, Allenby Road156 m away | 76 m² | 96 m² | +20 m² +26% | 2022 |
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| 3, Allendale Avenue379 m away | 86 m² | 106 m² | +20 m² +23% | 2019 |
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| 13, Knowsley Avenue859 m away | 117 m² | 137 m² | +20 m² +17% | 2014 |
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| 67, Ascot Gardens863 m away | 61 m² | 80 m² | +19 m² +31% | 2026 |
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| 47, Dormers Wells Lane368 m away | 111 m² | 130 m² | +19 m² +17% | 2024 |
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| 34, Sunnycroft Road899 m away | 71 m² | 90 m² | +19 m² +27% | 2022 |
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| 2, Lynwood Gardens739 m away | 71 m² | 90 m² | +19 m² +27% | 2020 |
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| 1, Sunnycroft Road899 m away | 86 m² | 105 m² | +19 m² +22% | 2016 |
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| 4, St Georges Avenue907 m away | 53 m² | 72 m² | +19 m² +36% | 2015 |
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| 142, Northcote Avenue905 m away | 110 m² | 129 m² | +19 m² +17% | 2014 |
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| 1, Astha Court, Kings Avenue874 m away | 91 m² | 110 m² | +19 m² +21% | 2013 |
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| 96, Somerset Road695 m away | 99 m² | 117 m² | +18 m² +18% | 2025 |
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| 8, Somerset Road666 m away | 100 m² | 118 m² | +18 m² +18% | 2024 |
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| 25, Longford Avenue408 m away | 96 m² | 114 m² | +18 m² +19% | 2023 |
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| 109, Burns Avenue228 m away | 93 m² | 111 m² | +18 m² +19% | 2016 |
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| 14, Hurley Road586 m away | 96 m² | 114 m² | +18 m² +19% | 2015 |
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| 12a, Burns Avenue335 m away | 96 m² | 114 m² | +18 m² +19% | 2014 |
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| 169, Park Avenue970 m away | 78 m² | 96 m² | +18 m² +23% | 2014 |
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| 23, St Peters Road556 m away | 96 m² | 113 m² | +17 m² +18% | 2023 |
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| 26a, Queens Avenue843 m away | 53 m² | 70 m² | +17 m² +32% | 2021 |
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| 234, Park Avenue969 m away | 89 m² | 106 m² | +17 m² +19% | 2014 |
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| 209, Allenby Road635 m away | 70 m² | 86 m² | +16 m² +23% | 2025 |
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| 1, Green Drive901 m away | 76 m² | 92 m² | +16 m² +21% | 2025 |
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| 199a, Lady Margaret Road619 m away | 84 m² | 100 m² | +16 m² +19% | 2024 |
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| 32, Devonshire Road950 m away | 77 m² | 93 m² | +16 m² +21% | 2024 |
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| 187, Somerset Road800 m away | 67 m² | 83 m² | +16 m² +24% | 2023 |
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| 63, Greenford Avenue679 m away | 42 m² | 58 m² | +16 m² +38% | 2022 |
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| 96, Dormers Wells Lane185 m away | 59 m² | 75 m² | +16 m² +27% | 2021 |
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| 46, Carlyle Avenue635 m away | 89 m² | 105 m² | +16 m² +18% | 2019 |
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| 11, Devonshire Road950 m away | 48 m² | 64 m² | +16 m² +33% | 2019 |
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| 19, Wallis Road329 m away | 58 m² | 74 m² | +16 m² +28% | 2014 |
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| 6, Darwin Drive479 m away | 102 m² | 118 m² | +16 m² +16% | 2013 |
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| 114, Evelyn Grove741 m away | 82 m² | 98 m² | +16 m² +20% | 2013 |
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| 83, Cranleigh Gardens846 m away | 57 m² | 73 m² | +16 m² +28% | 2009 |
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| 26, Evelyn Grove689 m away | 78 m² | 93 m² | +15 m² +19% | 2025 |
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| 136, Kings Avenue481 m away | 85 m² | 100 m² | +15 m² +18% | 2024 |
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| 158a, Uxbridge Road753 m away | 40 m² | 55 m² | +15 m² +38% | 2024 |
|---|
| 22, St Ursula Road433 m away | 64 m² | 79 m² | +15 m² +23% | 2022 |
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| 17, Birkdale Court, Redcroft Road765 m away | 49 m² | 64 m² | +15 m² +31% | 2016 |
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