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 CM13 1AZ
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 |
|---|---|---|---|---|
| Little Paddock, 8, Challacombe Close915 m away | 204 m² | 493 m² | +289 m² +142% | 2015 |
| Ker, Greenway706 m away | 245 m² | 497 m² | +252 m² +103% | 2022 |
| 63, Mount Avenue743 m away | 165 m² | 394 m² | +229 m² +139% | 2025 |
| Hillwood, 7, Hillwood Grove943 m away | 303 m² | 507 m² | +204 m² +67% | 2019 |
| Ormondhurst, Mount Avenue743 m away | 170 m² | 360 m² | +190 m² +112% | 2018 |
| Lofthus, Mallard Way561 m away | 123 m² | 301 m² | +178 m² +145% | 2021 |
| 26, Mount Avenue577 m away | 382 m² | 554 m² | +172 m² +45% | 2023 |
| 22, Roundwood Grove763 m away | 162 m² | 327 m² | +165 m² +102% | 2022 |
| 24, Roundwood Grove |
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.
| 176 m² |
| 340 m² |
| +164 m² +93% |
| 2012 |
| Russets, Darcy Close408 m away | 122 m² | 282 m² | +160 m² +131% | 2025 |
|---|
| 2, Shenfield Gardens211 m away | 112 m² | 272 m² | +160 m² +143% | 2019 |
|---|
| 1, Longaford Way904 m away | 154 m² | 308 m² | +154 m² +100% | 2025 |
|---|
| 89, Rayleigh Road498 m away | 115 m² | 266 m² | +151 m² +131% | 2015 |
|---|
| 178, Hanging Hill Lane998 m away | 151 m² | 292 m² | +141 m² +93% | 2020 |
|---|
| 8, Tennyson Road917 m away | 116 m² | 253 m² | +137 m² +118% | 2020 |
|---|
| Fairoak, Kandlewood383 m away | 212 m² | 338 m² | +126 m² +59% | 2025 |
|---|
| 42, Roundwood Avenue887 m away | 221 m² | 346 m² | +125 m² +57% | 2013 |
|---|
| 8, Willow Close285 m away | 83 m² | 207 m² | +124 m² +149% | 2025 |
|---|
| Greenloaning, 8, Herington Grove496 m away | 159 m² | 276 m² | +117 m² +74% | 2018 |
|---|
| 6, Janmead228 m away | 112 m² | 228 m² | +116 m² +104% | 2020 |
|---|
| 85, Sebastian Avenue416 m away | 86 m² | 201 m² | +115 m² +134% | 2023 |
|---|
| 32, Arnolds Avenue959 m away | 91 m² | 206 m² | +115 m² +126% | 2019 |
|---|
| 10, Friars Avenue764 m away | 132 m² | 245 m² | +113 m² +86% | 2023 |
|---|
| 78, Oliver Road771 m away | 88 m² | 200 m² | +112 m² +127% | 2022 |
|---|
| 60, Rayleigh Road101 m away | 107 m² | 219 m² | +112 m² +105% | 2020 |
|---|
| 21, Cory Drive322 m away | 132 m² | 242 m² | +110 m² +83% | 2025 |
|---|
| 34, Hall Green Lane952 m away | 118 m² | 228 m² | +110 m² +93% | 2025 |
|---|
| 32, Roundwood Avenue813 m away | 132 m² | 241 m² | +109 m² +83% | 2020 |
|---|
| 13, Tennyson Road917 m away | 154 m² | 259 m² | +105 m² +68% | 2021 |
|---|
| 117, Chelmsford Road824 m away | 91 m² | 196 m² | +105 m² +115% | 2019 |
|---|
| 25, Tennyson Road917 m away | 133 m² | 235 m² | +102 m² +77% | 2015 |
|---|
| 39, Friars Avenue764 m away | 109 m² | 209 m² | +100 m² +92% | 2026 |
|---|
| 11, Poplar Drive399 m away | 127 m² | 225 m² | +98 m² +77% | 2025 |
|---|
| 11, Friars Avenue764 m away | 92 m² | 188 m² | +96 m² +104% | 2024 |
|---|
| Highgrove, Heronway970 m away | 440 m² | 536 m² | +96 m² +22% | 2013 |
|---|
| 68, Kilworth Avenue581 m away | 87 m² | 182 m² | +95 m² +109% | 2014 |
|---|
| 46, Sebastian Avenue443 m away | 131 m² | 225 m² | +94 m² +72% | 2019 |
|---|
| 22, Friars Avenue764 m away | 89 m² | 183 m² | +94 m² +106% | 2019 |
|---|
| 18, Willow Close285 m away | 81 m² | 174 m² | +93 m² +115% | 2026 |
|---|
| 4, Willow Close285 m away | 71 m² | 161 m² | +90 m² +127% | 2024 |
|---|
| 9, St Marys Avenue715 m away | 72 m² | 161 m² | +89 m² +124% | 2026 |
|---|
| 40, Crossways628 m away | 135 m² | 224 m² | +89 m² +66% | 2019 |
|---|
| 22, Holmwood Avenue727 m away | 117 m² | 205 m² | +88 m² +75% | 2022 |
|---|
| 16, Willow Close285 m away | 75 m² | 160 m² | +85 m² +113% | 2014 |
|---|
| St. Briavels, Greenway510 m away | 231 m² | 315 m² | +84 m² +36% | 2023 |
|---|
| 19, Sebastian Avenue568 m away | 115 m² | 199 m² | +84 m² +73% | 2020 |
|---|
| 8, Woodland Close625 m away | 58 m² | 140 m² | +82 m² +141% | 2019 |
|---|
| 227, Hanging Hill Lane644 m away | 121 m² | 200 m² | +79 m² +65% | 2019 |
|---|
| 4, Arnolds Avenue797 m away | 56 m² | 134 m² | +78 m² +139% | 2024 |
|---|
| 18, Roundwood Grove763 m away | 217 m² | 295 m² | +78 m² +36% | 2016 |
|---|
| 222, Hanging Hill Lane641 m away | 172 m² | 249 m² | +77 m² +45% | 2025 |
|---|
| 113, Rayleigh Road768 m away | 93 m² | 170 m² | +77 m² +83% | 2017 |
|---|
| 34, Herington Grove737 m away | 101 m² | 175 m² | +74 m² +73% | 2022 |
|---|
| 65, Kilworth Avenue581 m away | 73 m² | 146 m² | +73 m² +100% | 2025 |
|---|
| 7, Lyndhurst Way919 m away | 102 m² | 174 m² | +72 m² +71% | 2024 |
|---|
| 15, Willow Close285 m away | 71 m² | 142 m² | +71 m² +100% | 2012 |
|---|
| 121, Rayleigh Road768 m away | 214 m² | 284 m² | +70 m² +33% | 2020 |
|---|
| 16, Hunter Avenue387 m away | 63 m² | 132 m² | +69 m² +110% | 2020 |
|---|
| 16, Oliver Road412 m away | 91 m² | 159 m² | +68 m² +75% | 2025 |
|---|
| 65, Woodland Avenue633 m away | 68 m² | 136 m² | +68 m² +100% | 2022 |
|---|
| 33, Crossways628 m away | 130 m² | 197 m² | +67 m² +52% | 2023 |
|---|
| 11, Janmead228 m away | 164 m² | 229 m² | +65 m² +40% | 2021 |
|---|
| 56, Walton Gardens833 m away | 58 m² | 123 m² | +65 m² +112% | 2017 |
|---|
| Hillcroft, Alexander Lane183 m away | 105 m² | 170 m² | +65 m² +62% | 2016 |
|---|
| 6, Graham Close831 m away | 95 m² | 159 m² | +64 m² +67% | 2019 |
|---|
| 31, Friars Avenue764 m away | 97 m² | 161 m² | +64 m² +66% | 2015 |
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| 28, Friars Avenue764 m away | 122 m² | 184 m² | +62 m² +51% | 2024 |
|---|
| 21, Sebastian Avenue568 m away | 119 m² | 181 m² | +62 m² +52% | 2021 |
|---|
| 40, Burses Way390 m away | 96 m² | 158 m² | +62 m² +65% | 2015 |
|---|
| 19, Cory Drive322 m away | 126 m² | 186 m² | +60 m² +48% | 2024 |
|---|
| 46, Oliver Road531 m away | 88 m² | 148 m² | +60 m² +68% | 2021 |
|---|
| 89, Woodland Avenue850 m away | 90 m² | 150 m² | +60 m² +67% | 2021 |
|---|
| 93, Sebastian Avenue416 m away | 62 m² | 122 m² | +60 m² +97% | 2018 |
|---|
| 8, Burses Way470 m away | 90 m² | 149 m² | +59 m² +66% | 2022 |
|---|
| 66, Kilworth Avenue581 m away | 91 m² | 150 m² | +59 m² +65% | 2011 |
|---|
| 47, Hutton Road965 m away | 143 m² | 202 m² | +59 m² +41% | 2010 |
|---|
| 2, Farm Close588 m away | 82 m² | 140 m² | +58 m² +71% | 2025 |
|---|
| 91, Long Ridings Avenue716 m away | 89 m² | 147 m² | +58 m² +65% | 2025 |
|---|
| 14, Crossways738 m away | 133 m² | 191 m² | +58 m² +44% | 2025 |
|---|
| Morada, Mount Avenue356 m away | 228 m² | 286 m² | +58 m² +25% | 2011 |
|---|
| 17, Tennyson Road917 m away | 132 m² | 189 m² | +57 m² +43% | 2022 |
|---|
| 65, Chelmsford Road833 m away | 81 m² | 138 m² | +57 m² +70% | 2017 |
|---|
| 3, Greyfriars477 m away | 220 m² | 277 m² | +57 m² +26% | 2016 |
|---|
| 59, Friars Avenue959 m away | 107 m² | 161 m² | +54 m² +50% | 2022 |
|---|
| 17, Surman Crescent501 m away | 96 m² | 150 m² | +54 m² +56% | 2014 |
|---|
| 7, Farm Close588 m away | 129 m² | 182 m² | +53 m² +41% | 2014 |
|---|
| 96, Chelmsford Road881 m away | 175 m² | 227 m² | +52 m² +30% | 2022 |
|---|
| 26, Oliver Road531 m away | 88 m² | 140 m² | +52 m² +59% | 2012 |
|---|
| 30, Roundwood Avenue813 m away | 177 m² | 228 m² | +51 m² +29% | 2025 |
|---|
| 80, Chelmsford Road881 m away | 158 m² | 209 m² | +51 m² +32% | 2024 |
|---|
| 48, Hunter Avenue387 m away | 91 m² | 142 m² | +51 m² +56% | 2023 |
|---|
| The Coppice, Greenway706 m away | 308 m² | 359 m² | +51 m² +17% | 2023 |
|---|
| 8, Rayleigh Road330 m away | 79 m² | 130 m² | +51 m² +65% | 2020 |
|---|
| 1a, Friars Avenue764 m away | 89 m² | 140 m² | +51 m² +57% | 2017 |
|---|
| 200, Hanging Hill Lane748 m away | 118 m² | 168 m² | +50 m² +42% | 2026 |
|---|
| 47, Poplar Drive399 m away | 112 m² | 162 m² | +50 m² +45% | 2024 |
|---|
| 8, Copeman Road909 m away | 78 m² | 128 m² | +50 m² +64% | 2022 |
|---|
| 10, Rochford Avenue707 m away | 105 m² | 155 m² | +50 m² +48% | 2020 |
|---|
| 62, Long Ridings Avenue632 m away | 81 m² | 131 m² | +50 m² +62% | 2018 |
|---|
| 129, Hunter Avenue350 m away | 89 m² | 138 m² | +49 m² +55% | 2019 |
|---|
| 10, Carpenter Path888 m away | 89 m² | 138 m² | +49 m² +55% | 2012 |
|---|
| 10, Coleridge Walk777 m away | 80 m² | 128 m² | +48 m² +60% | 2026 |
|---|
| 59, Arnolds Avenue873 m away | 60 m² | 108 m² | +48 m² +80% | 2020 |
|---|
| 4, Janmead228 m away | 110 m² | 158 m² | +48 m² +44% | 2014 |
|---|
| 5, Woodland Avenue493 m away | 97 m² | 144 m² | +47 m² +48% | 2014 |
|---|
| Alverstone, Alexander Lane438 m away | 123 m² | 169 m² | +46 m² +37% | 2026 |
|---|
| 68, Oliver Road671 m away | 94 m² | 139 m² | +45 m² +48% | 2026 |
|---|
| 30, Kilworth Avenue624 m away | 145 m² | 190 m² | +45 m² +31% | 2020 |
|---|
| 58, Woodland Avenue850 m away | 69 m² | 114 m² | +45 m² +65% | 2017 |
|---|
| 248, Hanging Hill Lane641 m away | 69 m² | 114 m² | +45 m² +65% | 2015 |
|---|
| 30, Arnolds Avenue959 m away | 81 m² | 125 m² | +44 m² +54% | 2013 |
|---|
| 86, Hunter Avenue350 m away | 58 m² | 101 m² | +43 m² +74% | 2024 |
|---|
| Monkhams, Friars Close946 m away | 205 m² | 248 m² | +43 m² +21% | 2024 |
|---|
| 49, Long Ridings Avenue632 m away | 91 m² | 133 m² | +42 m² +46% | 2024 |
|---|
| 34, Crossways738 m away | 121 m² | 163 m² | +42 m² +35% | 2018 |
|---|
| 117, Hunter Avenue350 m away | 88 m² | 130 m² | +42 m² +48% | 2017 |
|---|
| 14, Copeman Road909 m away | 66 m² | 107 m² | +41 m² +62% | 2024 |
|---|
| 23, Woodland Close625 m away | 75 m² | 115 m² | +40 m² +53% | 2022 |
|---|
| Longwood, Alexander Lane183 m away | 98 m² | 138 m² | +40 m² +41% | 2014 |
|---|
| Beechwood, Mount Avenue577 m away | 205 m² | 244 m² | +39 m² +19% | 2026 |
|---|
| 35, Woodland Avenue493 m away | 80 m² | 119 m² | +39 m² +49% | 2021 |
|---|
| 2, Kilworth Avenue624 m away | 148 m² | 187 m² | +39 m² +26% | 2021 |
|---|
| 19, Longaford Way904 m away | 169 m² | 208 m² | +39 m² +23% | 2020 |
|---|
| 17, Margaret Avenue778 m away | 118 m² | 156 m² | +38 m² +32% | 2025 |
|---|
| 44, Hunter Avenue387 m away | 89 m² | 127 m² | +38 m² +43% | 2023 |
|---|
| 34, Coram Green952 m away | 84 m² | 122 m² | +38 m² +45% | 2021 |
|---|
| 42, Friars Avenue959 m away | 123 m² | 161 m² | +38 m² +31% | 2020 |
|---|
| 7, Greyfriars477 m away | 150 m² | 188 m² | +38 m² +25% | 2017 |
|---|
| 18, Walton Gardens665 m away | 84 m² | 122 m² | +38 m² +45% | 2015 |
|---|
| 11, Coleridge Walk777 m away | 111 m² | 148 m² | +37 m² +33% | 2024 |
|---|
| 41, Arnolds Avenue873 m away | 63 m² | 100 m² | +37 m² +59% | 2018 |
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| 28, Byron Road915 m away | 100 m² | 137 m² | +37 m² +37% | 2016 |
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| 153, Rayleigh Road768 m away | 141 m² | 177 m² | +36 m² +26% | 2025 |
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| 21, Hall Green Lane952 m away | 175 m² | 211 m² | +36 m² +21% | 2015 |
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| 115, Rayleigh Road768 m away | 134 m² | 169 m² | +35 m² +26% | 2025 |
|---|
| 23, Newmans Drive655 m away | 159 m² | 194 m² | +35 m² +22% | 2024 |
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| 12, Long Ridings Avenue484 m away | 111 m² | 146 m² | +35 m² +32% | 2023 |
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| 108, Hunter Avenue350 m away | 53 m² | 88 m² | +35 m² +66% | 2020 |
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| 3, Tennyson Road917 m away | 105 m² | 140 m² | +35 m² +33% | 2020 |
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| 59, Woodland Avenue633 m away | 99 m² | 134 m² | +35 m² +35% | 2016 |
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| 171, Rayleigh Road768 m away | 75 m² | 109 m² | +34 m² +45% | 2025 |
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| 43, Arnolds Avenue873 m away | 78 m² | 112 m² | +34 m² +44% | 2022 |
|---|
| 149, Woodland Avenue976 m away | 70 m² | 104 m² | +34 m² +49% | 2021 |
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| 85a, Hutton Road642 m away | 23 m² | 56 m² | +33 m² +143% | 2026 |
|---|
| 84, Chelmsford Road881 m away | 167 m² | 200 m² | +33 m² +20% | 2026 |
|---|
| 10, Herington Grove496 m away | 219 m² | 252 m² | +33 m² +15% | 2024 |
|---|
| 26, Woodland Avenue633 m away | 86 m² | 119 m² | +33 m² +38% | 2013 |
|---|
| Flat 11, Ardleigh Court, Hutton Road988 m away | 55 m² | 87 m² | +32 m² +58% | 2021 |
|---|
| 35, Kilworth Avenue581 m away | 145 m² | 176 m² | +31 m² +21% | 2020 |
|---|
| 6, Beaumont Gardens638 m away | 143 m² | 173 m² | +30 m² +21% | 2026 |
|---|
| 64, Chelmsford Road886 m away | 108 m² | 138 m² | +30 m² +28% | 2025 |
|---|
| 91, Whittington Road901 m away | 36 m² | 66 m² | +30 m² +83% | 2025 |
|---|
| 6, Waltham Close470 m away | 96 m² | 126 m² | +30 m² +31% | 2023 |
|---|
| Flat 12, Ardleigh Court, Hutton Road988 m away | 55 m² | 85 m² | +30 m² +55% | 2021 |
|---|
| 113, Whittington Road954 m away | 79 m² | 109 m² | +30 m² +38% | 2018 |
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| 147, Rayleigh Road768 m away | 96 m² | 126 m² | +30 m² +31% | 2016 |
|---|
| 45, Long Ridings Avenue632 m away | 87 m² | 116 m² | +29 m² +33% | 2026 |
|---|
| 9, Friars Avenue764 m away | 122 m² | 151 m² | +29 m² +24% | 2020 |
|---|
| 31, Hall Green Lane952 m away | 148 m² | 177 m² | +29 m² +20% | 2012 |
|---|
| 24, Hunter Avenue387 m away | 64 m² | 93 m² | +29 m² +45% | 2011 |
|---|
| 60, Friars Avenue959 m away | 162 m² | 190 m² | +28 m² +17% | 2026 |
|---|
| 30, Woodland Avenue633 m away | 61 m² | 89 m² | +28 m² +46% | 2025 |
|---|
| 131, Hunter Avenue350 m away | 87 m² | 115 m² | +28 m² +32% | 2022 |
|---|
| 79, Oliver Road671 m away | 86 m² | 114 m² | +28 m² +33% | 2011 |
|---|
| 15, Lyndhurst Way919 m away | 120 m² | 147 m² | +27 m² +23% | 2025 |
|---|
| 147a, Chelmsford Road865 m away | 37 m² | 64 m² | +27 m² +73% | 2022 |
|---|
| 16, Coram Green952 m away | 69 m² | 96 m² | +27 m² +39% | 2022 |
|---|
| 64, Rayleigh Road524 m away | 82 m² | 109 m² | +27 m² +33% | 2014 |
|---|
| Flat 25, Ardleigh Court, Hutton Road988 m away | 56 m² | 82 m² | +26 m² +46% | 2021 |
|---|
| Flat 26, Ardleigh Court, Hutton Road988 m away | 56 m² | 82 m² | +26 m² +46% | 2021 |
|---|
| 33, Oliver Road531 m away | 86 m² | 112 m² | +26 m² +30% | 2020 |
|---|
| 71, Friars Avenue959 m away | 114 m² | 140 m² | +26 m² +23% | 2019 |
|---|
| 21, Surman Crescent501 m away | 79 m² | 105 m² | +26 m² +33% | 2014 |
|---|
| 7, Arnolds Close929 m away | 83 m² | 109 m² | +26 m² +31% | 2013 |
|---|
| 5, Oakland Gardens768 m away | 105 m² | 130 m² | +25 m² +24% | 2025 |
|---|
| 15, Woodland Avenue493 m away | 116 m² | 141 m² | +25 m² +22% | 2024 |
|---|
| 27, St Marys Avenue715 m away | 63 m² | 88 m² | +25 m² +40% | 2024 |
|---|
| 93, Friars Avenue959 m away | 121 m² | 146 m² | +25 m² +21% | 2019 |
|---|
| 2, Broxted Mews487 m away | 145 m² | 169 m² | +24 m² +17% | 2026 |
|---|
| 15, Holmwood Avenue727 m away | 148 m² | 172 m² | +24 m² +16% | 2022 |
|---|
| 28, Burses Way470 m away | 135 m² | 159 m² | +24 m² +18% | 2019 |
|---|
| 63, Sebastian Avenue443 m away | 139 m² | 163 m² | +24 m² +17% | 2018 |
|---|
| 28, Holmwood Avenue727 m away | 122 m² | 146 m² | +24 m² +20% | 2018 |
|---|
| 79, Sebastian Avenue416 m away | 69 m² | 93 m² | +24 m² +35% | 2017 |
|---|
| 50, Chelmsford Road886 m away | 155 m² | 179 m² | +24 m² +15% | 2014 |
|---|
| 1, Colet Road894 m away | 76 m² | 100 m² | +24 m² +32% | 2013 |
|---|
| 32, Crossways738 m away | 96 m² | 120 m² | +24 m² +25% | 2011 |
|---|
| 81, Oliver Road671 m away | 61 m² | 85 m² | +24 m² +39% | 2010 |
|---|
| 31c, Tennyson Road917 m away | 91 m² | 114 m² | +23 m² +25% | 2025 |
|---|
| 34, Rochford Avenue613 m away | 108 m² | 131 m² | +23 m² +21% | 2021 |
|---|
| Flat 27, Ardleigh Court, Hutton Road988 m away | 56 m² | 79 m² | +23 m² +41% | 2021 |
|---|
| 51, Woodland Avenue633 m away | 64 m² | 87 m² | +23 m² +36% | 2019 |
|---|
| Flat 1, Booths Court, Poplar Drive209 m away | 63 m² | 85 m² | +22 m² +35% | 2026 |
|---|
| 10, Hunter Avenue518 m away | 62 m² | 84 m² | +22 m² +35% | 2021 |
|---|
| 135, Hunter Avenue350 m away | 111 m² | 132 m² | +21 m² +19% | 2025 |
|---|
| Flat 39, Ardleigh Court, Hutton Road988 m away | 56 m² | 77 m² | +21 m² +38% | 2021 |
|---|
| Flat 36, Ardleigh Court, Hutton Road988 m away | 56 m² | 77 m² | +21 m² +38% | 2021 |
|---|
| Flat 38, Ardleigh Court, Hutton Road988 m away | 56 m² | 77 m² | +21 m² +38% | 2021 |
|---|
| 12, Hunter Avenue387 m away | 69 m² | 90 m² | +21 m² +30% | 2020 |
|---|
| 98, Woodland Avenue976 m away | 58 m² | 79 m² | +21 m² +36% | 2019 |
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