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 CM15 8HN
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 |
|---|---|---|---|---|
| The Red House, Mill Hill560 m away | 328 m² | 661 m² | +333 m² +102% | 2022 |
| 3, Brockley Grove476 m away | 244 m² | 512 m² | +268 m² +110% | 2017 |
| Ker, Greenway745 m away | 245 m² | 497 m² | +252 m² +103% | 2022 |
| Long Mead, Mill Hill560 m away | 193 m² | 428 m² | +235 m² +122% | 2015 |
| 27, Middleton Road418 m away | 197 m² | 420 m² | +223 m² +113% | 2019 |
| Hillwood, 7, Hillwood Grove905 m away | 303 m² | 507 m² | +204 m² +67% | 2019 |
| Ramblers Lodge, Brockley Grove476 m away | 305 m² | 506 m² | +201 m² +66% | 2026 |
| 30, Worrin Road233 m away | 218 m² | 399 m² | +181 m² +83% | 2019 |
| Lofthus, Mallard Way896 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.
| 123 m² |
| 301 m² |
| +178 m² +145% |
| 2021 |
| 22, Roundwood Grove819 m away | 162 m² | 327 m² | +165 m² +102% | 2022 |
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| 24, Roundwood Grove819 m away | 176 m² | 340 m² | +164 m² +93% | 2012 |
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| 14, Middleton Road418 m away | 202 m² | 354 m² | +152 m² +75% | 2023 |
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| 37, Ridgeway944 m away | 206 m² | 358 m² | +152 m² +74% | 2021 |
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| 36, Ridgeway818 m away | 300 m² | 448 m² | +148 m² +49% | 2017 |
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| 25, Shenfield Crescent856 m away | 112 m² | 246 m² | +134 m² +120% | 2020 |
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| 109, Priests Lane47 m away | 139 m² | 273 m² | +134 m² +96% | 2013 |
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| Rosecroft, 85, Ingrave Road930 m away | 141 m² | 273 m² | +132 m² +94% | 2015 |
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| 7, Park Way218 m away | 159 m² | 290 m² | +131 m² +82% | 2022 |
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| 24, Woodway370 m away | 107 m² | 238 m² | +131 m² +122% | 2019 |
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| 112, Priests Lane0 m away | 151 m² | 280 m² | +129 m² +85% | 2024 |
|---|
| 42, Roundwood Avenue569 m away | 221 m² | 346 m² | +125 m² +57% | 2013 |
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| 72, Victors Crescent980 m away | 103 m² | 223 m² | +120 m² +117% | 2019 |
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| Greenloaning, 8, Herington Grove958 m away | 159 m² | 276 m² | +117 m² +74% | 2018 |
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| 4, Baymans Wood508 m away | 242 m² | 357 m² | +115 m² +48% | 2025 |
|---|
| 41, Woodway471 m away | 106 m² | 220 m² | +114 m² +108% | 2018 |
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| 10, Friars Avenue734 m away | 132 m² | 245 m² | +113 m² +86% | 2023 |
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| 174a, Priests Lane262 m away | 93 m² | 203 m² | +110 m² +118% | 2017 |
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| 32, Roundwood Avenue684 m away | 132 m² | 241 m² | +109 m² +83% | 2020 |
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| 77, Shenfield Place807 m away | 217 m² | 325 m² | +108 m² +50% | 2022 |
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| 4, Middleton Road418 m away | 148 m² | 255 m² | +107 m² +72% | 2018 |
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| 100, Shenfield Place807 m away | 125 m² | 230 m² | +105 m² +84% | 2026 |
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| 31, Spurgate539 m away | 215 m² | 318 m² | +103 m² +48% | 2025 |
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| 42, Heronway808 m away | 298 m² | 401 m² | +103 m² +35% | 2024 |
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| 39, Friars Avenue734 m away | 109 m² | 209 m² | +100 m² +92% | 2026 |
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| 27, Spurgate539 m away | 128 m² | 225 m² | +97 m² +76% | 2017 |
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| 11, Friars Avenue734 m away | 92 m² | 188 m² | +96 m² +104% | 2024 |
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| Highgrove, Heronway702 m away | 440 m² | 536 m² | +96 m² +22% | 2013 |
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| 22, Friars Avenue734 m away | 89 m² | 183 m² | +94 m² +106% | 2019 |
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| 9, Cliveden Close501 m away | 179 m² | 271 m² | +92 m² +51% | 2014 |
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| 12, Baymans Wood508 m away | 195 m² | 285 m² | +90 m² +46% | 2025 |
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| 117, Worrin Road511 m away | 102 m² | 192 m² | +90 m² +88% | 2016 |
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| 40, Crossways981 m away | 135 m² | 224 m² | +89 m² +66% | 2019 |
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| 9, Middleton Road418 m away | 182 m² | 269 m² | +87 m² +48% | 2013 |
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| St. Briavels, Greenway935 m away | 231 m² | 315 m² | +84 m² +36% | 2023 |
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| 74, Worrin Road118 m away | 83 m² | 167 m² | +84 m² +101% | 2013 |
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| 38, Princes Way302 m away | 99 m² | 181 m² | +82 m² +83% | 2023 |
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| 2, Park Way218 m away | 245 m² | 327 m² | +82 m² +33% | 2019 |
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| 40, Spurgate539 m away | 101 m² | 182 m² | +81 m² +80% | 2015 |
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| 108, Priests Lane0 m away | 177 m² | 256 m² | +79 m² +45% | 2020 |
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| 18, Roundwood Grove819 m away | 217 m² | 295 m² | +78 m² +36% | 2016 |
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| 2, The Cobbles765 m away | 105 m² | 182 m² | +77 m² +73% | 2020 |
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| 34, Herington Grove707 m away | 101 m² | 175 m² | +74 m² +73% | 2022 |
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| 13, Shenfield Crescent898 m away | 145 m² | 219 m² | +74 m² +51% | 2014 |
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| 36, Heronway808 m away | 206 m² | 279 m² | +73 m² +35% | 2022 |
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| 6, Shenfield Crescent898 m away | 96 m² | 164 m² | +68 m² +71% | 2025 |
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| 172, Priests Lane262 m away | 133 m² | 201 m² | +68 m² +51% | 2021 |
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| 3, Cliveden Close501 m away | 177 m² | 245 m² | +68 m² +38% | 2018 |
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| 33, Crossways981 m away | 130 m² | 197 m² | +67 m² +52% | 2023 |
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| 11, Hogarth Avenue813 m away | 96 m² | 161 m² | +65 m² +68% | 2015 |
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| 31, Friars Avenue734 m away | 97 m² | 161 m² | +64 m² +66% | 2015 |
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| 19, Abbots Close209 m away | 89 m² | 152 m² | +63 m² +71% | 2026 |
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| 28, Spurgate414 m away | 108 m² | 171 m² | +63 m² +58% | 2022 |
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| Covertside, 104, Priests Lane0 m away | 332 m² | 395 m² | +63 m² +19% | 2015 |
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| 28, Friars Avenue734 m away | 122 m² | 184 m² | +62 m² +51% | 2024 |
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| 92, Knights Way902 m away | 72 m² | 134 m² | +62 m² +86% | 2022 |
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| 47, Hutton Road691 m away | 143 m² | 202 m² | +59 m² +41% | 2010 |
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| 35, Mulberry Hill679 m away | 135 m² | 193 m² | +58 m² +43% | 2023 |
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| 119, Worrin Road511 m away | 145 m² | 203 m² | +58 m² +40% | 2021 |
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| 12, Bowhay692 m away | 267 m² | 322 m² | +55 m² +21% | 2023 |
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| 11, Shenfield Place887 m away | 173 m² | 227 m² | +54 m² +31% | 2024 |
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| 59, Friars Avenue505 m away | 107 m² | 161 m² | +54 m² +50% | 2022 |
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| 58, Victors Crescent980 m away | 60 m² | 114 m² | +54 m² +90% | 2011 |
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| 41, Brocksparkwood953 m away | 78 m² | 131 m² | +53 m² +68% | 2020 |
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| 57, Woodway471 m away | 140 m² | 192 m² | +52 m² +37% | 2025 |
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| 7, Luppit Close613 m away | 209 m² | 261 m² | +52 m² +25% | 2019 |
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| 6, Maple Close968 m away | 83 m² | 135 m² | +52 m² +63% | 2018 |
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| Sun Gate, 47, Ridgeway818 m away | 251 m² | 302 m² | +51 m² +20% | 2026 |
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| 46, Worrin Road118 m away | 103 m² | 154 m² | +51 m² +50% | 2025 |
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| 30, Roundwood Avenue684 m away | 177 m² | 228 m² | +51 m² +29% | 2025 |
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| The Coppice, Greenway745 m away | 308 m² | 359 m² | +51 m² +17% | 2023 |
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| 101, Shenfield Place807 m away | 125 m² | 176 m² | +51 m² +41% | 2020 |
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| 1a, Friars Avenue734 m away | 89 m² | 140 m² | +51 m² +57% | 2017 |
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| 63a, Worrin Road272 m away | 133 m² | 183 m² | +50 m² +38% | 2017 |
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| 26, Spurgate414 m away | 109 m² | 158 m² | +49 m² +45% | 2025 |
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| 39, Ridgeway944 m away | 273 m² | 322 m² | +49 m² +18% | 2025 |
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| 7, York Road665 m away | 51 m² | 95 m² | +44 m² +86% | 2024 |
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| Monkhams, Friars Close599 m away | 205 m² | 248 m² | +43 m² +21% | 2024 |
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| 99, Shenfield Place807 m away | 138 m² | 181 m² | +43 m² +31% | 2022 |
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| 86, Worrin Road272 m away | 185 m² | 228 m² | +43 m² +23% | 2018 |
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| 12, Beech Avenue808 m away | 82 m² | 123 m² | +41 m² +50% | 2026 |
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| 160, Worrin Road699 m away | 141 m² | 180 m² | +39 m² +28% | 2023 |
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| 17, Margaret Avenue899 m away | 118 m² | 156 m² | +38 m² +32% | 2025 |
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| 68, Victors Crescent980 m away | 63 m² | 101 m² | +38 m² +60% | 2024 |
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| 42, Friars Avenue505 m away | 123 m² | 161 m² | +38 m² +31% | 2020 |
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| 34, Beech Avenue940 m away | 82 m² | 119 m² | +37 m² +45% | 2021 |
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| 148, Priests Lane0 m away | 133 m² | 170 m² | +37 m² +28% | 2019 |
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| Aldeburgh, 202, Priests Lane403 m away | 113 m² | 149 m² | +36 m² +32% | 2020 |
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| 193, Priests Lane419 m away | 134 m² | 169 m² | +35 m² +26% | 2011 |
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| 1, Gordon Road373 m away | 102 m² | 136 m² | +34 m² +33% | 2026 |
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| 85a, Hutton Road894 m away | 23 m² | 56 m² | +33 m² +143% | 2026 |
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| 10, Herington Grove958 m away | 219 m² | 252 m² | +33 m² +15% | 2024 |
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| Flat 11, Ardleigh Court, Hutton Road790 m away | 55 m² | 87 m² | +32 m² +58% | 2021 |
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| 44, Princes Way302 m away | 100 m² | 132 m² | +32 m² +32% | 2010 |
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| 52, Shenfield Place943 m away | 114 m² | 144 m² | +30 m² +26% | 2023 |
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| Flat 12, Ardleigh Court, Hutton Road790 m away | 55 m² | 85 m² | +30 m² +55% | 2021 |
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| 11, York Close762 m away | 96 m² | 126 m² | +30 m² +31% | 2015 |
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| 9, Friars Avenue734 m away | 122 m² | 151 m² | +29 m² +24% | 2020 |
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| 60, Friars Avenue505 m away | 162 m² | 190 m² | +28 m² +17% | 2026 |
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| The Oaks, 78a, Victors Crescent980 m away | 167 m² | 195 m² | +28 m² +17% | 2022 |
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| 44, Woodway471 m away | 157 m² | 185 m² | +28 m² +18% | 2019 |
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| 14, Gordon Road373 m away | 69 m² | 96 m² | +27 m² +39% | 2024 |
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| 3, The Cobbles765 m away | 67 m² | 94 m² | +27 m² +40% | 2019 |
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| 72, Brocksparkwood953 m away | 90 m² | 116 m² | +26 m² +29% | 2026 |
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| 30, Princes Way302 m away | 102 m² | 128 m² | +26 m² +25% | 2022 |
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| Flat 25, Ardleigh Court, Hutton Road790 m away | 56 m² | 82 m² | +26 m² +46% | 2021 |
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| Flat 26, Ardleigh Court, Hutton Road790 m away | 56 m² | 82 m² | +26 m² +46% | 2021 |
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| 71, Friars Avenue505 m away | 114 m² | 140 m² | +26 m² +23% | 2019 |
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| 9, Boleyn Gardens870 m away | 77 m² | 103 m² | +26 m² +34% | 2015 |
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| 10, Chelmsford Road928 m away | 103 m² | 129 m² | +26 m² +25% | 2015 |
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| 1, Brickfield Cottages199 m away | 60 m² | 85 m² | +25 m² +42% | 2025 |
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| 53, Brocksparkwood953 m away | 79 m² | 104 m² | +25 m² +32% | 2022 |
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| 93, Friars Avenue505 m away | 121 m² | 146 m² | +25 m² +21% | 2019 |
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| 88, Brocksparkwood953 m away | 70 m² | 94 m² | +24 m² +34% | 2018 |
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| Flat 27, Ardleigh Court, Hutton Road790 m away | 56 m² | 79 m² | +23 m² +41% | 2021 |
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| 9, The Coverts394 m away | 96 m² | 119 m² | +23 m² +24% | 2020 |
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| 58, Brocksparkwood953 m away | 64 m² | 86 m² | +22 m² +34% | 2026 |
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| 7, Spurgate414 m away | 90 m² | 112 m² | +22 m² +24% | 2016 |
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| 48, Orchard Avenue801 m away | 103 m² | 124 m² | +21 m² +20% | 2025 |
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| Flat 39, Ardleigh Court, Hutton Road790 m away | 56 m² | 77 m² | +21 m² +38% | 2021 |
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| Flat 36, Ardleigh Court, Hutton Road790 m away | 56 m² | 77 m² | +21 m² +38% | 2021 |
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| Flat 38, Ardleigh Court, Hutton Road790 m away | 56 m² | 77 m² | +21 m² +38% | 2021 |
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| 96, Shenfield Road632 m away | 115 m² | 136 m² | +21 m² +18% | 2019 |
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| 19, Spalt Close732 m away | 71 m² | 91 m² | +20 m² +28% | 2026 |
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| 87, Priests Lane47 m away | 122 m² | 142 m² | +20 m² +16% | 2024 |
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| Flat 34, Ardleigh Court, Hutton Road790 m away | 56 m² | 76 m² | +20 m² +36% | 2021 |
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| 1, Silver Birches417 m away | 100 m² | 120 m² | +20 m² +20% | 2020 |
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| Flat 1, Ardleigh Court, Hutton Road790 m away | 68 m² | 87 m² | +19 m² +28% | 2023 |
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| Flat 7, Ardleigh Court, Hutton Road790 m away | 49 m² | 68 m² | +19 m² +39% | 2021 |
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| Flat 13, Ardleigh Court, Hutton Road790 m away | 49 m² | 68 m² | +19 m² +39% | 2021 |
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| 109a, Ingrave Road930 m away | 121 m² | 140 m² | +19 m² +16% | 2018 |
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| 24, Princes Way302 m away | 100 m² | 119 m² | +19 m² +19% | 2013 |
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| Flat 9, Ardleigh Court, Hutton Road790 m away | 49 m² | 67 m² | +18 m² +37% | 2021 |
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| Flat 15, Ardleigh Court, Hutton Road790 m away | 49 m² | 67 m² | +18 m² +37% | 2021 |
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| 51, Friars Avenue505 m away | 89 m² | 106 m² | +17 m² +19% | 2025 |
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| 3, Woodway289 m away | 101 m² | 118 m² | +17 m² +17% | 2023 |
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| 35, Spalt Close732 m away | 37 m² | 54 m² | +17 m² +46% | 2021 |
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| Flat 14, Ardleigh Court, Hutton Road790 m away | 49 m² | 66 m² | +17 m² +35% | 2021 |
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| Flat 8, Ardleigh Court, Hutton Road790 m away | 49 m² | 66 m² | +17 m² +35% | 2021 |
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| Flat 17, Ardleigh Court, Hutton Road790 m away | 49 m² | 66 m² | +17 m² +35% | 2021 |
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| Flat 2, Ardleigh Lodge, Hutton Road749 m away | 54 m² | 70 m² | +16 m² +30% | 2023 |
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| 18, Abbots Close209 m away | 97 m² | 112 m² | +15 m² +15% | 2026 |
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| 178, Priests Lane262 m away | 86 m² | 101 m² | +15 m² +17% | 2026 |
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| Flat 5, Ardleigh Court, Hutton Road790 m away | 51 m² | 66 m² | +15 m² +29% | 2021 |
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| Flat 6, Ardleigh Court, Hutton Road790 m away | 51 m² | 66 m² | +15 m² +29% | 2021 |
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| Flat 10, Ardleigh Court, Hutton Road790 m away | 55 m² | 70 m² | +15 m² +27% | 2021 |
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