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 TW18 1EN
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 |
|---|---|---|---|---|
| 6, Riverfield Road860 m away | 178 m² | 394 m² | +216 m² +121% | 2017 |
| Elmhurst, Penton Hook Road834 m away | 101 m² | 251 m² | +150 m² +149% | 2022 |
| Heathfield, St Pinnock Avenue713 m away | 114 m² | 245 m² | +131 m² +115% | 2022 |
| 19, Thickthorne Lane598 m away | 106 m² | 229 m² | +123 m² +116% | 2019 |
| Jonmari, Cotswold Close848 m away | 110 m² | 229 m² | +119 m² +108% | 2025 |
| Tanglewood, Penton Hall Drive852 m away | 96 m² | 213 m² | +117 m² +122% | 2026 |
| 61, Penton Road800 m away | 98 m² | 207 m² | +109 m² +111% | 2025 |
| 166, Commercial Road227 m away | 92 m² | 195 m² | +103 m² +112% | 2016 |
| 231, Laleham Road |
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.
| 273 m² |
| 371 m² |
| +98 m² +36% |
| 2015 |
| 181, Staines Road776 m away | 77 m² | 171 m² | +94 m² +122% | 2020 |
|---|
| 73, Worple Avenue425 m away | 83 m² | 174 m² | +91 m² +110% | 2026 |
|---|
| 2, Meadow Croft848 m away | 82 m² | 172 m² | +90 m² +110% | 2015 |
|---|
| 179, Staines Road776 m away | 78 m² | 166 m² | +88 m² +113% | 2012 |
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| 7, Penton Road722 m away | 116 m² | 197 m² | +81 m² +70% | 2015 |
|---|
| Ambleside, Penton Hall Drive852 m away | 81 m² | 161 m² | +80 m² +99% | 2022 |
|---|
| 150, Laleham Road456 m away | 153 m² | 233 m² | +80 m² +52% | 2015 |
|---|
| 1, Meadow Croft, Cotswold Close848 m away | 61 m² | 140 m² | +79 m² +130% | 2024 |
|---|
| 6, Avondale Avenue778 m away | 73 m² | 152 m² | +79 m² +108% | 2023 |
|---|
| 49, Laleham Road957 m away | 123 m² | 202 m² | +79 m² +64% | 2023 |
|---|
| Lockholm, Penton Hall Drive852 m away | 87 m² | 166 m² | +79 m² +91% | 2016 |
|---|
| 24, The Ryde916 m away | 137 m² | 215 m² | +78 m² +57% | 2019 |
|---|
| 65, Penton Road800 m away | 94 m² | 170 m² | +76 m² +81% | 2020 |
|---|
| 18, Cherry Tree Avenue376 m away | 68 m² | 142 m² | +74 m² +109% | 2026 |
|---|
| 185, Commercial Road168 m away | 76 m² | 150 m² | +74 m² +97% | 2020 |
|---|
| 4, Lansdowne Road307 m away | 89 m² | 160 m² | +71 m² +80% | 2024 |
|---|
| 16, Hurstdene Avenue207 m away | 104 m² | 174 m² | +70 m² +67% | 2024 |
|---|
| 5, Ash Grove473 m away | 62 m² | 131 m² | +69 m² +111% | 2023 |
|---|
| 8, Berryscroft Road773 m away | 101 m² | 170 m² | +69 m² +68% | 2020 |
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| 37, Avondale Avenue781 m away | 51 m² | 118 m² | +67 m² +131% | 2016 |
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| 15, Pavilion Gardens362 m away | 89 m² | 154 m² | +65 m² +73% | 2026 |
|---|
| 5, Knightsbridge Crescent128 m away | 105 m² | 169 m² | +64 m² +61% | 2025 |
|---|
| 33, Wheatsheaf Lane553 m away | 87 m² | 148 m² | +61 m² +70% | 2019 |
|---|
| 202, Worple Road379 m away | 69 m² | 129 m² | +60 m² +87% | 2025 |
|---|
| 104, Laleham Road627 m away | 105 m² | 165 m² | +60 m² +57% | 2025 |
|---|
| 157, Staines Road897 m away | 142 m² | 202 m² | +60 m² +42% | 2022 |
|---|
| 12, Grosvenor Road285 m away | 90 m² | 150 m² | +60 m² +67% | 2019 |
|---|
| 6, Greenlake Terrace494 m away | 64 m² | 124 m² | +60 m² +94% | 2016 |
|---|
| 22, Meadway Close608 m away | 83 m² | 141 m² | +58 m² +70% | 2026 |
|---|
| 24, Worple Avenue350 m away | 69 m² | 127 m² | +58 m² +84% | 2019 |
|---|
| 26, Templedene Avenue317 m away | 88 m² | 143 m² | +55 m² +63% | 2024 |
|---|
| 8, Knowle Park Avenue513 m away | 132 m² | 186 m² | +54 m² +41% | 2023 |
|---|
| 135, Elizabeth Avenue733 m away | 81 m² | 134 m² | +53 m² +65% | 2020 |
|---|
| 9, Worple Road360 m away | 79 m² | 130 m² | +51 m² +65% | 2025 |
|---|
| 9, The Avenue770 m away | 141 m² | 192 m² | +51 m² +36% | 2024 |
|---|
| 6, Beehive Road937 m away | 47 m² | 98 m² | +51 m² +109% | 2021 |
|---|
| 7, Homestead Road247 m away | 60 m² | 110 m² | +50 m² +83% | 2020 |
|---|
| 20, Duncombe Court, Thames Side894 m away | 92 m² | 142 m² | +50 m² +54% | 2016 |
|---|
| 145, Grosvenor Road245 m away | 101 m² | 150 m² | +49 m² +49% | 2025 |
|---|
| 86, Worple Road157 m away | 62 m² | 111 m² | +49 m² +79% | 2014 |
|---|
| 29, Chestnut Grove514 m away | 68 m² | 117 m² | +49 m² +72% | 2014 |
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| 32, Wheatsheaf Lane629 m away | 90 m² | 136 m² | +46 m² +51% | 2021 |
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| 34, Guildford Street576 m away | 69 m² | 113 m² | +44 m² +64% | 2025 |
|---|
| 44, Gordon Close401 m away | 106 m² | 150 m² | +44 m² +42% | 2024 |
|---|
| 113, Laleham Road802 m away | 134 m² | 178 m² | +44 m² +33% | 2023 |
|---|
| 26, Westbourne Road322 m away | 46 m² | 90 m² | +44 m² +96% | 2020 |
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| 22, Knightsbridge Crescent128 m away | 95 m² | 139 m² | +44 m² +46% | 2015 |
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| 19, Penton Avenue932 m away | 96 m² | 139 m² | +43 m² +45% | 2021 |
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| Englewick, Penton Hook Road834 m away | 94 m² | 137 m² | +43 m² +46% | 2019 |
|---|
| 123, Thames Side948 m away | 211 m² | 254 m² | +43 m² +20% | 2019 |
|---|
| 44, Hazel Grove388 m away | 70 m² | 113 m² | +43 m² +61% | 2014 |
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| 3, Hurstdene Avenue207 m away | 95 m² | 137 m² | +42 m² +44% | 2026 |
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| 10, Meadway598 m away | 121 m² | 163 m² | +42 m² +35% | 2026 |
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| 30, Penton Hook Road667 m away | 175 m² | 217 m² | +42 m² +24% | 2025 |
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| 2, Stainash Crescent633 m away | 66 m² | 108 m² | +42 m² +64% | 2020 |
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| 30, Warwick Avenue795 m away | 61 m² | 103 m² | +42 m² +69% | 2014 |
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| 12, Cherry Tree Avenue376 m away | 92 m² | 133 m² | +41 m² +45% | 2025 |
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| 10, Riverway996 m away | 167 m² | 208 m² | +41 m² +25% | 2023 |
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| 97, Strodes Crescent847 m away | 80 m² | 121 m² | +41 m² +51% | 2016 |
|---|
| 25, Carlyle Road628 m away | 114 m² | 154 m² | +40 m² +35% | 2019 |
|---|
| 40, Chestnut Grove503 m away | 74 m² | 114 m² | +40 m² +54% | 2018 |
|---|
| 17, Grosvenor Road325 m away | 84 m² | 123 m² | +39 m² +46% | 2021 |
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| 222, Kingston Road833 m away | 123 m² | 162 m² | +39 m² +32% | 2021 |
|---|
| 5, The Avenue770 m away | 113 m² | 152 m² | +39 m² +35% | 2012 |
|---|
| 172, Commercial Road126 m away | 119 m² | 157 m² | +38 m² +32% | 2024 |
|---|
| 13, Farm Road235 m away | 55 m² | 93 m² | +38 m² +69% | 2024 |
|---|
| 3, Worple Avenue425 m away | 88 m² | 125 m² | +37 m² +42% | 2020 |
|---|
| 26, Farm Road235 m away | 70 m² | 107 m² | +37 m² +53% | 2016 |
|---|
| 17, Parkside Place297 m away | 105 m² | 142 m² | +37 m² +35% | 2016 |
|---|
| 29, Hurstdene Avenue372 m away | 99 m² | 136 m² | +37 m² +37% | 2014 |
|---|
| 87, Worple Avenue425 m away | 79 m² | 115 m² | +36 m² +46% | 2026 |
|---|
| 115, Templedene Avenue525 m away | 91 m² | 127 m² | +36 m² +40% | 2024 |
|---|
| 17, Lansdowne Road307 m away | 91 m² | 127 m² | +36 m² +40% | 2023 |
|---|
| 35, Templedene Avenue342 m away | 81 m² | 117 m² | +36 m² +44% | 2022 |
|---|
| 23, Meadway Close608 m away | 84 m² | 120 m² | +36 m² +43% | 2017 |
|---|
| 19, Penton Road722 m away | 95 m² | 130 m² | +35 m² +37% | 2022 |
|---|
| 1, Penton Road722 m away | 115 m² | 149 m² | +34 m² +30% | 2023 |
|---|
| 9, Ash Grove473 m away | 65 m² | 98 m² | +33 m² +51% | 2020 |
|---|
| 20, Park Avenue688 m away | 107 m² | 139 m² | +32 m² +30% | 2020 |
|---|
| 113, Grosvenor Road245 m away | 116 m² | 147 m² | +31 m² +27% | 2026 |
|---|
| 66, Knightsbridge Crescent128 m away | 95 m² | 126 m² | +31 m² +33% | 2025 |
|---|
| 29, Manor Place878 m away | 44 m² | 74 m² | +30 m² +68% | 2026 |
|---|
| 21, Florence Gardens445 m away | 94 m² | 124 m² | +30 m² +32% | 2025 |
|---|
| 1, Chiltern Close801 m away | 110 m² | 140 m² | +30 m² +27% | 2025 |
|---|
| 80, Edgell Road839 m away | 73 m² | 103 m² | +30 m² +41% | 2023 |
|---|
| 15, Hurstdene Avenue207 m away | 133 m² | 163 m² | +30 m² +23% | 2021 |
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| 22, Worple Road383 m away | 103 m² | 133 m² | +30 m² +29% | 2021 |
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| 45, Pavilion Gardens362 m away | 92 m² | 122 m² | +30 m² +33% | 2019 |
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| 49, Cherry Tree Avenue383 m away | 84 m² | 113 m² | +29 m² +35% | 2025 |
|---|
| 70, Petersfield Road789 m away | 62 m² | 91 m² | +29 m² +47% | 2020 |
|---|
| 67, Lansdowne Road307 m away | 106 m² | 134 m² | +28 m² +26% | 2023 |
|---|
| 34, Ash Grove507 m away | 93 m² | 121 m² | +28 m² +30% | 2023 |
|---|
| 32, Guildford Street576 m away | 86 m² | 113 m² | +27 m² +31% | 2024 |
|---|
| 2, Broadacre806 m away | 113 m² | 140 m² | +27 m² +24% | 2023 |
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| 64a, Avondale Avenue853 m away | 52 m² | 79 m² | +27 m² +52% | 2023 |
|---|
| 152, Laleham Road456 m away | 150 m² | 177 m² | +27 m² +18% | 2019 |
|---|
| 35, Worple Road185 m away | 84 m² | 110 m² | +26 m² +31% | 2025 |
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| 57, Nursery Gardens196 m away | 79 m² | 105 m² | +26 m² +33% | 2025 |
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| 63, Lansdowne Road307 m away | 126 m² | 152 m² | +26 m² +21% | 2025 |
|---|
| 53, Gordon Close368 m away | 83 m² | 109 m² | +26 m² +31% | 2021 |
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| 43, Meadway613 m away | 74 m² | 100 m² | +26 m² +35% | 2015 |
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| 58, Templedene Avenue458 m away | 117 m² | 142 m² | +25 m² +21% | 2026 |
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| 10, Murdoch Close904 m away | 74 m² | 99 m² | +25 m² +34% | 2023 |
|---|
| 216, Staines Road538 m away | 129 m² | 154 m² | +25 m² +19% | 2019 |
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| 1, Bramley Close555 m away | 43 m² | 68 m² | +25 m² +58% | 2014 |
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| 131, Grosvenor Road245 m away | 122 m² | 146 m² | +24 m² +20% | 2025 |
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| 20, Worple Road383 m away | 83 m² | 107 m² | +24 m² +29% | 2022 |
|---|
| 52, Knightsbridge Crescent128 m away | 93 m² | 117 m² | +24 m² +26% | 2019 |
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| 77, Gresham Road995 m away | 42 m² | 66 m² | +24 m² +57% | 2017 |
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| 12, Knightsbridge Crescent128 m away | 48 m² | 71 m² | +23 m² +48% | 2026 |
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| 83, Nursery Gardens58 m away | 78 m² | 101 m² | +23 m² +29% | 2025 |
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| 1, Templedene Avenue342 m away | 140 m² | 163 m² | +23 m² +16% | 2022 |
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| 134, Laleham Road531 m away | 95 m² | 118 m² | +23 m² +24% | 2020 |
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| 23, Arnold Road775 m away | 75 m² | 98 m² | +23 m² +31% | 2020 |
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| 9, Guildford Street576 m away | 81 m² | 104 m² | +23 m² +28% | 2014 |
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| 9, Duncombe Court, Thames Side894 m away | 47 m² | 70 m² | +23 m² +49% | 2014 |
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| 97, Grosvenor Road245 m away | 131 m² | 153 m² | +22 m² +17% | 2026 |
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| 48, Parkside Place297 m away | 78 m² | 100 m² | +22 m² +28% | 2026 |
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| 132, Riverbank, Laleham Road767 m away | 68 m² | 90 m² | +22 m² +32% | 2024 |
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| 23, Ruskin Road644 m away | 83 m² | 105 m² | +22 m² +27% | 2021 |
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| 19, Willowmead956 m away | 59 m² | 81 m² | +22 m² +37% | 2020 |
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| 53, Worple Road185 m away | 100 m² | 122 m² | +22 m² +22% | 2014 |
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| 12, Lansdowne Road332 m away | 48 m² | 69 m² | +21 m² +44% | 2025 |
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| 43, Hurstdene Avenue372 m away | 78 m² | 99 m² | +21 m² +27% | 2025 |
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| 16, Cherry Tree Avenue376 m away | 81 m² | 102 m² | +21 m² +26% | 2025 |
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| 73, Penton Road800 m away | 100 m² | 121 m² | +21 m² +21% | 2025 |
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| 160, Worple Road127 m away | 70 m² | 91 m² | +21 m² +30% | 2024 |
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| 31, Riverbank, Laleham Road834 m away | 60 m² | 81 m² | +21 m² +35% | 2023 |
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| 7, Pavilion Gardens362 m away | 115 m² | 136 m² | +21 m² +18% | 2022 |
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| 54, Nursery Gardens95 m away | 59 m² | 80 m² | +21 m² +36% | 2019 |
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| 72, Brightside Avenue596 m away | 65 m² | 85 m² | +20 m² +31% | 2024 |
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| 50, Avondale Avenue778 m away | 66 m² | 86 m² | +20 m² +30% | 2024 |
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| 13, Gordon Close368 m away | 86 m² | 106 m² | +20 m² +23% | 2023 |
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| 19, Gresham Road864 m away | 122 m² | 142 m² | +20 m² +16% | 2023 |
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| 1, Wessex Terrace980 m away | 87 m² | 107 m² | +20 m² +23% | 2023 |
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| 8, Chiltern Close801 m away | 117 m² | 137 m² | +20 m² +17% | 2021 |
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| 142, Kingston Road490 m away | 51 m² | 71 m² | +20 m² +39% | 2018 |
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| 246a, Staines Road538 m away | 73 m² | 93 m² | +20 m² +27% | 2017 |
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| 109, Strodes Crescent847 m away | 102 m² | 121 m² | +19 m² +19% | 2026 |
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| 127, Elizabeth Avenue733 m away | 119 m² | 138 m² | +19 m² +16% | 2020 |
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| 9, Templedene Avenue342 m away | 88 m² | 107 m² | +19 m² +22% | 2018 |
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| 18, Stuart Way100 m away | 56 m² | 75 m² | +19 m² +34% | 2016 |
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| Flat 3, Houghton, Rookery Road632 m away | 47 m² | 66 m² | +19 m² +40% | 2012 |
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| 56, The Glade87 m away | 93 m² | 111 m² | +18 m² +19% | 2026 |
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| 45, Meadway613 m away | 67 m² | 85 m² | +18 m² +27% | 2026 |
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| 26, Worple Road383 m away | 80 m² | 98 m² | +18 m² +23% | 2025 |
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| 16, Ruskin Road644 m away | 91 m² | 109 m² | +18 m² +20% | 2024 |
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| 29, Florence Gardens445 m away | 75 m² | 93 m² | +18 m² +24% | 2022 |
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| 223, Kingston Road871 m away | 101 m² | 119 m² | +18 m² +18% | 2020 |
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| 102d, Avondale Avenue930 m away | 44 m² | 62 m² | +18 m² +41% | 2020 |
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| Flat 5, Houghton, Rookery Road632 m away | 44 m² | 62 m² | +18 m² +41% | 2019 |
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| 186, Commercial Road126 m away | 78 m² | 96 m² | +18 m² +23% | 2017 |
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| 7b, Riverfield Road860 m away | 63 m² | 81 m² | +18 m² +29% | 2013 |
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| 41, Cherry Tree Avenue383 m away | 112 m² | 129 m² | +17 m² +15% | 2023 |
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| 5, Whiteways Court, Pavilion Gardens289 m away | 47 m² | 64 m² | +17 m² +36% | 2022 |
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| 1, Farm Road235 m away | 56 m² | 73 m² | +17 m² +30% | 2021 |
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| 45, Cherry Orchard864 m away | 79 m² | 96 m² | +17 m² +22% | 2020 |
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| 5, Wythegate, Riverside Road918 m away | 56 m² | 73 m² | +17 m² +30% | 2014 |
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| 103, Nursery Gardens58 m away | 75 m² | 91 m² | +16 m² +21% | 2026 |
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| 168, Worple Road127 m away | 90 m² | 106 m² | +16 m² +18% | 2022 |
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| 32, Stainash Crescent633 m away | 74 m² | 90 m² | +16 m² +22% | 2021 |
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| 49, Kenilworth Gardens739 m away | 65 m² | 81 m² | +16 m² +25% | 2019 |
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| Flat 8, Onslow Lodge, Riverside Road918 m away | 40 m² | 56 m² | +16 m² +40% | 2019 |
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| 11, Thickthorne Lane598 m away | 73 m² | 89 m² | +16 m² +22% | 2018 |
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| 38, Brightside Avenue622 m away | 76 m² | 92 m² | +16 m² +21% | 2018 |
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| 40, Edinburgh Drive902 m away | 73 m² | 89 m² | +16 m² +22% | 2014 |
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| 28, The Glade87 m away | 54 m² | 69 m² | +15 m² +28% | 2024 |
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| 39, Chestnut Grove514 m away | 87 m² | 102 m² | +15 m² +17% | 2024 |
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| 10, Broadacre806 m away | 87 m² | 102 m² | +15 m² +17% | 2022 |
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| 202, Staines Road538 m away | 89 m² | 104 m² | +15 m² +17% | 2021 |
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| 5, Hazel Grove367 m away | 99 m² | 114 m² | +15 m² +15% | 2020 |
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| 1, Fenton Avenue657 m away | 58 m² | 73 m² | +15 m² +26% | 2020 |
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| 98, Edgell Road839 m away | 40 m² | 55 m² | +15 m² +38% | 2020 |
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| 8, Northfield Road958 m away | 74 m² | 89 m² | +15 m² +20% | 2019 |
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| 24, Garrick Close716 m away | 77 m² | 92 m² | +15 m² +19% | 2018 |
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| 194a, Laleham Road461 m away | 70 m² | 85 m² | +15 m² +21% | 2016 |
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| 9, Brightside Avenue615 m away | 79 m² | 94 m² | +15 m² +19% | 2016 |
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| 19, Duncombe Court, Thames Side894 m away | 77 m² | 92 m² | +15 m² +19% | 2014 |
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