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 TW14 9LA
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 |
|---|---|---|---|---|
| 121, Hounslow Road406 m away | 85 m² | 189 m² | +104 m² +122% | 2025 |
| 128, Sparrow Farm Drive951 m away | 68 m² | 168 m² | +100 m² +147% | 2026 |
| 11, Clymping Dene100 m away | 135 m² | 221 m² | +86 m² +64% | 2023 |
| 62, Viola Avenue569 m away | 68 m² | 150 m² | +82 m² +121% | 2023 |
| 117, Hounslow Road406 m away | 61 m² | 134 m² | +73 m² +120% | 2019 |
| 9, Rosslyn Avenue332 m away | 77 m² | 146 m² | +69 m² +90% | 2026 |
| 55, Hanworth Road852 m away | 143 m² | 209 m² | +66 m² +46% | 2022 |
| 186, Hounslow Road646 m away | 72 m² | 138 m² | +66 m² +92% | 2020 |
| 92, Shaftesbury Avenue417 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.
| 71 m² |
| 134 m² |
| +63 m² +89% |
| 2024 |
| 306, Bedfont Lane928 m away | 83 m² | 145 m² | +62 m² +75% | 2025 |
|---|
| 4, Letchworth Avenue920 m away | 72 m² | 131 m² | +59 m² +82% | 2026 |
|---|
| 20, Sandycombe Road659 m away | 99 m² | 156 m² | +57 m² +58% | 2020 |
|---|
| 69, Trevithick Close965 m away | 71 m² | 128 m² | +57 m² +80% | 2013 |
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| 24, Cygnet Avenue878 m away | 90 m² | 144 m² | +54 m² +60% | 2024 |
|---|
| 119, The Drive594 m away | 61 m² | 114 m² | +53 m² +87% | 2022 |
|---|
| 37, The Drive422 m away | 71 m² | 122 m² | +51 m² +72% | 2025 |
|---|
| 115, Carlton Avenue795 m away | 87 m² | 138 m² | +51 m² +59% | 2025 |
|---|
| 16, Sandycombe Road659 m away | 64 m² | 115 m² | +51 m² +80% | 2012 |
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| 107, Tachbrook Road752 m away | 189 m² | 239 m² | +50 m² +26% | 2023 |
|---|
| 7, Buckingham Avenue219 m away | 50 m² | 100 m² | +50 m² +100% | 2020 |
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| 50, Queens Road593 m away | 95 m² | 144 m² | +49 m² +52% | 2021 |
|---|
| 45, Queens Road563 m away | 41 m² | 87 m² | +46 m² +112% | 2018 |
|---|
| 33, Sparrow Farm Drive742 m away | 84 m² | 130 m² | +46 m² +55% | 2014 |
|---|
| 62, Harlington Road East842 m away | 78 m² | 123 m² | +45 m² +58% | 2026 |
|---|
| 38, Helen Avenue58 m away | 99 m² | 144 m² | +45 m² +45% | 2021 |
|---|
| 150, Bedfont Lane612 m away | 110 m² | 155 m² | +45 m² +41% | 2015 |
|---|
| 2, The Green975 m away | 105 m² | 150 m² | +45 m² +43% | 2013 |
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| 94, Fruen Road677 m away | 80 m² | 124 m² | +44 m² +55% | 2021 |
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| 148a, Staines Road533 m away | 33 m² | 77 m² | +44 m² +133% | 2019 |
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| 72, Shaftesbury Avenue199 m away | 65 m² | 108 m² | +43 m² +66% | 2025 |
|---|
| 56, Buckingham Avenue230 m away | 89 m² | 131 m² | +42 m² +47% | 2020 |
|---|
| 249, Westmacott Drive920 m away | 58 m² | 99 m² | +41 m² +71% | 2023 |
|---|
| 31, Durham Road560 m away | 70 m² | 111 m² | +41 m² +59% | 2019 |
|---|
| 41, Cassiobury Avenue842 m away | 85 m² | 125 m² | +40 m² +47% | 2023 |
|---|
| 42, Queens Road593 m away | 85 m² | 125 m² | +40 m² +47% | 2017 |
|---|
| 79, Shaftesbury Avenue363 m away | 89 m² | 128 m² | +39 m² +44% | 2022 |
|---|
| 39, Sparrow Farm Drive742 m away | 74 m² | 112 m² | +38 m² +51% | 2015 |
|---|
| 80, Danesbury Road954 m away | 81 m² | 118 m² | +37 m² +46% | 2026 |
|---|
| 154, Staines Road533 m away | 84 m² | 121 m² | +37 m² +44% | 2025 |
|---|
| 32, Gloucester Road721 m away | 90 m² | 126 m² | +36 m² +40% | 2026 |
|---|
| 47, Tachbrook Road752 m away | 78 m² | 114 m² | +36 m² +46% | 2026 |
|---|
| 17, Buckingham Avenue219 m away | 75 m² | 111 m² | +36 m² +48% | 2025 |
|---|
| 8, Andover Close874 m away | 55 m² | 91 m² | +36 m² +65% | 2014 |
|---|
| 133, Harlington Road West303 m away | 69 m² | 104 m² | +35 m² +51% | 2026 |
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| 94, Durham Road662 m away | 64 m² | 99 m² | +35 m² +55% | 2024 |
|---|
| 102, Carlton Avenue804 m away | 83 m² | 118 m² | +35 m² +42% | 2023 |
|---|
| 28, Cassiobury Avenue851 m away | 90 m² | 125 m² | +35 m² +39% | 2013 |
|---|
| 28, Rosslyn Avenue357 m away | 72 m² | 106 m² | +34 m² +47% | 2025 |
|---|
| 7, Tachbrook Road752 m away | 95 m² | 129 m² | +34 m² +36% | 2023 |
|---|
| 85, Burns Avenue553 m away | 82 m² | 116 m² | +34 m² +41% | 2021 |
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| 1, Clymping Dene100 m away | 120 m² | 154 m² | +34 m² +28% | 2016 |
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| 37, Danesbury Road996 m away | 80 m² | 113 m² | +33 m² +41% | 2026 |
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| 17, Kings Road733 m away | 101 m² | 134 m² | +33 m² +33% | 2023 |
|---|
| 45, Harlington Road West136 m away | 94 m² | 127 m² | +33 m² +35% | 2020 |
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| 159, Sparrow Farm Drive624 m away | 81 m² | 114 m² | +33 m² +41% | 2015 |
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| 149, Field Road286 m away | 55 m² | 88 m² | +33 m² +60% | 2014 |
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| 26, Westminster Close795 m away | 58 m² | 91 m² | +33 m² +57% | 2014 |
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| 108a, Hanover Avenue1000 m away | 99 m² | 131 m² | +32 m² +32% | 2019 |
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| 15a, Station Parade317 m away | 60 m² | 92 m² | +32 m² +53% | 2015 |
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| 87, Staines Road527 m away | 89 m² | 120 m² | +31 m² +35% | 2021 |
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| 42, Helen Avenue58 m away | 80 m² | 110 m² | +30 m² +38% | 2015 |
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| 46, Hounslow Road300 m away | 104 m² | 133 m² | +29 m² +28% | 2024 |
|---|
| 31, Beeston Way708 m away | 46 m² | 75 m² | +29 m² +63% | 2021 |
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| 33, Gladstone Avenue180 m away | 70 m² | 99 m² | +29 m² +41% | 2020 |
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| 55, Pentelow Gardens675 m away | 69 m² | 97 m² | +28 m² +41% | 2021 |
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| 127a, Harlington Road West303 m away | 41 m² | 69 m² | +28 m² +68% | 2019 |
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| 15, Southern Avenue675 m away | 84 m² | 111 m² | +27 m² +32% | 2024 |
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| 83, Harlington Road West303 m away | 88 m² | 115 m² | +27 m² +31% | 2014 |
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| 51, Pentelow Gardens675 m away | 95 m² | 121 m² | +26 m² +27% | 2026 |
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| 24, Gloucester Road721 m away | 53 m² | 79 m² | +26 m² +49% | 2026 |
|---|
| 1, Sandycombe Road659 m away | 91 m² | 117 m² | +26 m² +29% | 2024 |
|---|
| 9, Ruskin Avenue678 m away | 80 m² | 106 m² | +26 m² +33% | 2024 |
|---|
| 185, Bedfont Lane723 m away | 128 m² | 154 m² | +26 m² +20% | 2016 |
|---|
| 35, Pentelow Gardens675 m away | 108 m² | 133 m² | +25 m² +23% | 2025 |
|---|
| 23, Sparrow Farm Drive742 m away | 92 m² | 117 m² | +25 m² +27% | 2025 |
|---|
| 93, Hounslow Road406 m away | 40 m² | 65 m² | +25 m² +63% | 2020 |
|---|
| 113, Staines Road527 m away | 33 m² | 58 m² | +25 m² +76% | 2017 |
|---|
| 73, Gladstone Avenue180 m away | 70 m² | 94 m² | +24 m² +34% | 2025 |
|---|
| Flat 67, Azalea House, Bedfont Lane667 m away | 66 m² | 90 m² | +24 m² +36% | 2022 |
|---|
| 34, Buckingham Avenue230 m away | 86 m² | 110 m² | +24 m² +28% | 2021 |
|---|
| 61, Staines Road527 m away | 100 m² | 124 m² | +24 m² +24% | 2014 |
|---|
| Manama, Walsham Road237 m away | 88 m² | 111 m² | +23 m² +26% | 2023 |
|---|
| 260, Westmacott Drive937 m away | 73 m² | 96 m² | +23 m² +32% | 2022 |
|---|
| 22, The Drive412 m away | 49 m² | 72 m² | +23 m² +47% | 2021 |
|---|
| 47, Park Way423 m away | 88 m² | 111 m² | +23 m² +26% | 2016 |
|---|
| 97, The Drive594 m away | 63 m² | 86 m² | +23 m² +37% | 2016 |
|---|
| 98, Fruen Road677 m away | 46 m² | 69 m² | +23 m² +50% | 2015 |
|---|
| 9, Buckingham Avenue219 m away | 93 m² | 115 m² | +22 m² +24% | 2022 |
|---|
| 116, Field Road276 m away | 61 m² | 83 m² | +22 m² +36% | 2022 |
|---|
| 84, Queens Road593 m away | 76 m² | 98 m² | +22 m² +29% | 2022 |
|---|
| Flat 19, Azalea House, Bedfont Lane667 m away | 71 m² | 93 m² | +22 m² +31% | 2020 |
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| 24, Clive Road608 m away | 92 m² | 114 m² | +22 m² +24% | 2018 |
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| 15, Trevithick Close965 m away | 51 m² | 73 m² | +22 m² +43% | 2015 |
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| 13, Trevithick Close965 m away | 62 m² | 84 m² | +22 m² +35% | 2015 |
|---|
| 105, Carlton Avenue795 m away | 95 m² | 117 m² | +22 m² +23% | 2014 |
|---|
| 64, Trevithick Close965 m away | 56 m² | 78 m² | +22 m² +39% | 2014 |
|---|
| 49, Pentelow Gardens675 m away | 101 m² | 123 m² | +22 m² +22% | 2013 |
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| 33, Queens Road563 m away | 70 m² | 92 m² | +22 m² +31% | 2012 |
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| 75, Tachbrook Road752 m away | 87 m² | 109 m² | +22 m² +25% | 2012 |
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| 3, Cassiobury Avenue842 m away | 63 m² | 84 m² | +21 m² +33% | 2026 |
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| 137, Hounslow Road528 m away | 77 m² | 98 m² | +21 m² +27% | 2024 |
|---|
| 31, Queens Road563 m away | 91 m² | 112 m² | +21 m² +23% | 2024 |
|---|
| 8, Ashmead Road681 m away | 73 m² | 94 m² | +21 m² +29% | 2024 |
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| 124, Sparrow Farm Drive951 m away | 87 m² | 108 m² | +21 m² +24% | 2022 |
|---|
| Flat 6, 225, Westmacott Drive920 m away | 40 m² | 61 m² | +21 m² +53% | 2021 |
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| 17, Salisbury Road942 m away | 87 m² | 108 m² | +21 m² +24% | 2020 |
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| 69, Viola Avenue673 m away | 97 m² | 118 m² | +21 m² +22% | 2015 |
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| 71, Harlington Road West303 m away | 114 m² | 134 m² | +20 m² +18% | 2026 |
|---|
| Flat 22, Camellia House, Tilley Road720 m away | 64 m² | 84 m² | +20 m² +31% | 2026 |
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| 19, Hereford Road820 m away | 98 m² | 118 m² | +20 m² +20% | 2026 |
|---|
| 14, Queens Road593 m away | 91 m² | 111 m² | +20 m² +22% | 2021 |
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| 70, Tachbrook Road733 m away | 91 m² | 111 m² | +20 m² +22% | 2021 |
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| 55, Carlton Avenue540 m away | 83 m² | 103 m² | +20 m² +24% | 2019 |
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| Flat 66, Hamlyn House, High Street711 m away | 43 m² | 63 m² | +20 m² +47% | 2016 |
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| 132, Field Road276 m away | 41 m² | 61 m² | +20 m² +49% | 2015 |
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| 8, Hounslow Road300 m away | 48 m² | 68 m² | +20 m² +42% | 2015 |
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| 251a, Staines Road603 m away | 75 m² | 95 m² | +20 m² +27% | 2012 |
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| 61, Shaftesbury Avenue168 m away | 84 m² | 103 m² | +19 m² +23% | 2026 |
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| 51, Tachbrook Road752 m away | 76 m² | 95 m² | +19 m² +25% | 2025 |
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| 50, Ruskin Avenue678 m away | 74 m² | 93 m² | +19 m² +26% | 2023 |
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| 53, Ruskin Avenue678 m away | 81 m² | 100 m² | +19 m² +23% | 2022 |
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| 57, Lansbury Avenue416 m away | 70 m² | 89 m² | +19 m² +27% | 2021 |
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| 117, Sparrow Farm Drive892 m away | 101 m² | 120 m² | +19 m² +19% | 2021 |
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| 53, Trevithick Close965 m away | 46 m² | 65 m² | +19 m² +41% | 2015 |
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| 274, Westmacott Drive937 m away | 72 m² | 90 m² | +18 m² +25% | 2025 |
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| 20, Salisbury Road942 m away | 89 m² | 107 m² | +18 m² +20% | 2025 |
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| 324, Bedfont Lane928 m away | 71 m² | 89 m² | +18 m² +25% | 2024 |
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| 44, Eldridge Close842 m away | 80 m² | 98 m² | +18 m² +23% | 2022 |
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| 23, Fruen Road762 m away | 95 m² | 113 m² | +18 m² +19% | 2020 |
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| 51, Helen Avenue0 m away | 84 m² | 102 m² | +18 m² +21% | 2017 |
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| 35, Westminster Close795 m away | 73 m² | 91 m² | +18 m² +25% | 2014 |
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| 28, Durham Road507 m away | 49 m² | 66 m² | +17 m² +35% | 2025 |
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| 56, Harlington Road East842 m away | 69 m² | 86 m² | +17 m² +25% | 2025 |
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| 12, Danesbury Road954 m away | 79 m² | 96 m² | +17 m² +22% | 2025 |
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| Flat 47, Camellia House, Tilley Road720 m away | 49 m² | 66 m² | +17 m² +35% | 2023 |
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| 24, Queens Road593 m away | 93 m² | 110 m² | +17 m² +18% | 2022 |
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| Flat 12, Hamlyn House, High Street711 m away | 60 m² | 77 m² | +17 m² +28% | 2020 |
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| 268, Westmacott Drive937 m away | 74 m² | 91 m² | +17 m² +23% | 2015 |
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| 93, Harlington Road West303 m away | 103 m² | 119 m² | +16 m² +16% | 2026 |
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| 48, Cromwell Road668 m away | 97 m² | 113 m² | +16 m² +16% | 2024 |
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| 253, Westmacott Drive920 m away | 86 m² | 102 m² | +16 m² +19% | 2024 |
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| 27, Shaftesbury Avenue168 m away | 79 m² | 95 m² | +16 m² +20% | 2023 |
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| 182, Hounslow Road646 m away | 102 m² | 118 m² | +16 m² +16% | 2023 |
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| 44, Letchworth Avenue920 m away | 69 m² | 85 m² | +16 m² +23% | 2023 |
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| 264, Westmacott Drive937 m away | 78 m² | 94 m² | +16 m² +21% | 2023 |
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| 220, Sparrow Farm Drive703 m away | 96 m² | 112 m² | +16 m² +17% | 2019 |
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| 8, Park Way391 m away | 54 m² | 70 m² | +16 m² +30% | 2016 |
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| 278, Westmacott Drive937 m away | 62 m² | 78 m² | +16 m² +26% | 2015 |
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| 48, Gladstone Avenue199 m away | 67 m² | 83 m² | +16 m² +24% | 2014 |
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| 28, Jubilee Way934 m away | 70 m² | 86 m² | +16 m² +23% | 2014 |
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| 126, Durham Road662 m away | 77 m² | 92 m² | +15 m² +19% | 2026 |
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| 247, Westmacott Drive920 m away | 69 m² | 84 m² | +15 m² +22% | 2026 |
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| 107, Fruen Road651 m away | 95 m² | 110 m² | +15 m² +16% | 2021 |
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| 60, Bertelli Place867 m away | 84 m² | 99 m² | +15 m² +18% | 2021 |
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| Flat 29, Azalea House, Bedfont Lane667 m away | 72 m² | 87 m² | +15 m² +21% | 2020 |
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| 1, Byward Avenue658 m away | 65 m² | 80 m² | +15 m² +23% | 2019 |
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| 264, Bedfont Lane928 m away | 87 m² | 102 m² | +15 m² +17% | 2018 |
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