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 BN21 3JF
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 |
|---|---|---|---|---|
| 20, Furness Road984 m away | 84 m² | 199 m² | +115 m² +137% | 2025 |
| 12a, Grove Road869 m away | 130 m² | 230 m² | +100 m² +77% | 2025 |
| The Tiles, 2, Furness Road984 m away | 120 m² | 212 m² | +92 m² +77% | 2024 |
| 95, Pevensey Road142 m away | 152 m² | 242 m² | +90 m² +59% | 2020 |
| Flat 54, Devonshire Mansions, 54, Grand Parade872 m away | 77 m² | 162 m² | +85 m² +110% | 2011 |
| 118, Whitley Road779 m away | 112 m² | 189 m² | +77 m² +69% | 2026 |
| 97, Ashford Road401 m away | 66 m² | 141 m² | +75 m² +114% | 2023 |
| 8, Annington Road957 m away | 96 m² | 169 m² | +73 m² +76% | 2019 |
| 8, College Road915 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.
| 120 m² |
| 193 m² |
| +73 m² +61% |
| 2012 |
| 25, Mayfield Place824 m away | 74 m² | 144 m² | +70 m² +95% | 2020 |
|---|
| 38, Winchcombe Road514 m away | 74 m² | 144 m² | +70 m² +95% | 2013 |
|---|
| 7, West Terrace858 m away | 128 m² | 197 m² | +69 m² +54% | 2025 |
|---|
| 9, Willowfield Square309 m away | 104 m² | 171 m² | +67 m² +64% | 2008 |
|---|
| 5, Lewes Road950 m away | 206 m² | 272 m² | +66 m² +32% | 2019 |
|---|
| Highgates, Cambridge Mews, Rylstone Road605 m away | 169 m² | 229 m² | +60 m² +36% | 2014 |
|---|
| 35, Pevensey Road169 m away | 37 m² | 92 m² | +55 m² +149% | 2023 |
|---|
| 43, Pevensey Road169 m away | 180 m² | 233 m² | +53 m² +29% | 2025 |
|---|
| 1, Elms Avenue261 m away | 93 m² | 145 m² | +52 m² +56% | 2026 |
|---|
| 18a, Cornfield Terrace659 m away | 137 m² | 189 m² | +52 m² +38% | 2013 |
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| 91, Firle Road633 m away | 59 m² | 109 m² | +50 m² +85% | 2021 |
|---|
| 24, Furness Road984 m away | 238 m² | 288 m² | +50 m² +21% | 2018 |
|---|
| 9, Willowfield Road229 m away | 156 m² | 206 m² | +50 m² +32% | 2010 |
|---|
| 44, Cavendish Place103 m away | 170 m² | 218 m² | +48 m² +28% | 2019 |
|---|
| Flat 1, Pearl Court, Devonshire Place623 m away | 119 m² | 167 m² | +48 m² +40% | 2017 |
|---|
| 28, Whitley Road918 m away | 86 m² | 133 m² | +47 m² +55% | 2013 |
|---|
| 158, Ashford Road330 m away | 53 m² | 99 m² | +46 m² +87% | 2020 |
|---|
| 7, Lushington Road697 m away | 72 m² | 118 m² | +46 m² +64% | 2011 |
|---|
| 78, Firle Road583 m away | 49 m² | 94 m² | +45 m² +92% | 2023 |
|---|
| 32, Cambridge Road531 m away | 71 m² | 116 m² | +45 m² +63% | 2011 |
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| 89a, South Street776 m away | 59 m² | 104 m² | +45 m² +76% | 2010 |
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| 110, Whitley Road842 m away | 190 m² | 233 m² | +43 m² +23% | 2015 |
|---|
| 2, Hampden Terrace474 m away | 34 m² | 77 m² | +43 m² +126% | 2009 |
|---|
| Flat 37, Westdown House, Hartington Place459 m away | 74 m² | 116 m² | +42 m² +57% | 2024 |
|---|
| 7, Cavendish Avenue436 m away | 120 m² | 162 m² | +42 m² +35% | 2023 |
|---|
| 7, Bedfordwell Road785 m away | 115 m² | 156 m² | +41 m² +36% | 2025 |
|---|
| 85, Langney Road130 m away | 116 m² | 157 m² | +41 m² +35% | 2024 |
|---|
| 64, Seaside225 m away | 64 m² | 105 m² | +41 m² +64% | 2022 |
|---|
| 15, St Aubyns Road373 m away | 145 m² | 186 m² | +41 m² +28% | 2014 |
|---|
| 153, Seaside652 m away | 31 m² | 72 m² | +41 m² +132% | 2009 |
|---|
| 18, Gilbert Road715 m away | 101 m² | 141 m² | +40 m² +40% | 2020 |
|---|
| 93, Pevensey Road142 m away | 35 m² | 74 m² | +39 m² +111% | 2012 |
|---|
| Flat 4, 24, Upperton Gardens946 m away | 74 m² | 112 m² | +38 m² +51% | 2025 |
|---|
| 19, Western Road644 m away | 83 m² | 121 m² | +38 m² +46% | 2022 |
|---|
| 11, West Terrace858 m away | 56 m² | 94 m² | +38 m² +68% | 2020 |
|---|
| 7, Barden Road804 m away | 41 m² | 79 m² | +38 m² +93% | 2019 |
|---|
| 28, St Leonards Road680 m away | 40 m² | 78 m² | +38 m² +95% | 2015 |
|---|
| Royal Sovereign Court, 67, Royal Parade683 m away | 46 m² | 84 m² | +38 m² +83% | 2010 |
|---|
| Flat 2, 26, Seaside Road256 m away | 59 m² | 96 m² | +37 m² +63% | 2024 |
|---|
| 46, Longstone Road401 m away | 64 m² | 101 m² | +37 m² +58% | 2023 |
|---|
| Flat 3, 4, Upperton Gardens946 m away | 74 m² | 111 m² | +37 m² +50% | 2016 |
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| 24, Rylstone Road838 m away | 99 m² | 136 m² | +37 m² +37% | 2015 |
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| 15, Hoad Road580 m away | 66 m² | 103 m² | +37 m² +56% | 2014 |
|---|
| 2, Chawbrook Mews, Chawbrook Road679 m away | 47 m² | 84 m² | +37 m² +79% | 2014 |
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| 14, Gilbert Road715 m away | 47 m² | 83 m² | +36 m² +77% | 2023 |
|---|
| 87, Bourne Street396 m away | 90 m² | 126 m² | +36 m² +40% | 2022 |
|---|
| 197, Seaside804 m away | 103 m² | 139 m² | +36 m² +35% | 2022 |
|---|
| Flat 5, 1c, Susans Road239 m away | 33 m² | 68 m² | +35 m² +106% | 2022 |
|---|
| 25, Elms Avenue261 m away | 153 m² | 187 m² | +34 m² +22% | 2021 |
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| 70, Latimer Road661 m away | 94 m² | 128 m² | +34 m² +36% | 2019 |
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| 176 - 180, Terminus Road350 m away | 43 m² | 77 m² | +34 m² +79% | 2013 |
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| 87, Firle Road576 m away | 120 m² | 153 m² | +33 m² +28% | 2026 |
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| 6, Taddington Road857 m away | 102 m² | 135 m² | +33 m² +32% | 2025 |
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| 27, Gilbert Road715 m away | 107 m² | 140 m² | +33 m² +31% | 2022 |
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| 33, Dudley Road768 m away | 97 m² | 130 m² | +33 m² +34% | 2020 |
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| 3, Oxford Road590 m away | 67 m² | 100 m² | +33 m² +49% | 2015 |
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| 11, West Street Mews866 m away | 31 m² | 63 m² | +32 m² +103% | 2024 |
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| 38, Willowfield Road469 m away | 48 m² | 80 m² | +32 m² +67% | 2018 |
|---|
| 34, Avondale Road679 m away | 76 m² | 108 m² | +32 m² +42% | 2013 |
|---|
| Flat 4a, Avenue Mansions, Elms Avenue270 m away | 80 m² | 111 m² | +31 m² +39% | 2025 |
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| 9, Winchcombe Road514 m away | 93 m² | 124 m² | +31 m² +33% | 2023 |
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| 23, Cavendish Avenue436 m away | 99 m² | 130 m² | +31 m² +31% | 2022 |
|---|
| Flat 24a, Victoria Mansions, 208, Terminus Road350 m away | 78 m² | 109 m² | +31 m² +40% | 2021 |
|---|
| 7, Willowfield Road229 m away | 147 m² | 177 m² | +30 m² +20% | 2025 |
|---|
| Flat 1, 5, Spencer Road861 m away | 55 m² | 85 m² | +30 m² +55% | 2019 |
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| 142, Latimer Road922 m away | 95 m² | 125 m² | +30 m² +32% | 2018 |
|---|
| Flat 7, Delamere Court, Hyde Road819 m away | 54 m² | 84 m² | +30 m² +56% | 2015 |
|---|
| 8, Montgomery Mews, Commercial Road640 m away | 61 m² | 90 m² | +29 m² +48% | 2025 |
|---|
| 10, College Road915 m away | 182 m² | 211 m² | +29 m² +16% | 2025 |
|---|
| Flat 26, Sussex House, Hartington Place509 m away | 49 m² | 78 m² | +29 m² +59% | 2018 |
|---|
| 21, Willowfield Square309 m away | 130 m² | 159 m² | +29 m² +22% | 2014 |
|---|
| 42, Avondale Road679 m away | 73 m² | 102 m² | +29 m² +40% | 2012 |
|---|
| 11, Carlisle Road944 m away | 32 m² | 61 m² | +29 m² +91% | 2010 |
|---|
| 9, Addingham Road786 m away | 115 m² | 143 m² | +28 m² +24% | 2026 |
|---|
| 15, Whitley Road878 m away | 98 m² | 126 m² | +28 m² +29% | 2021 |
|---|
| 35, Willowfield Road324 m away | 110 m² | 138 m² | +28 m² +25% | 2020 |
|---|
| Flat 6, Valentine Court, South Street753 m away | 68 m² | 96 m² | +28 m² +41% | 2020 |
|---|
| 14, Cornfield Terrace659 m away | 39 m² | 67 m² | +28 m² +72% | 2009 |
|---|
| 44, Susans Road336 m away | 99 m² | 126 m² | +27 m² +27% | 2024 |
|---|
| 68, Susans Road397 m away | 68 m² | 95 m² | +27 m² +40% | 2023 |
|---|
| 24, Clarence Road844 m away | 97 m² | 124 m² | +27 m² +28% | 2022 |
|---|
| Flat 4, Pebble Court, 16, Bourne Street52 m away | 20 m² | 47 m² | +27 m² +135% | 2019 |
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| Flat 2, Hadley House, Upperton Road962 m away | 84 m² | 111 m² | +27 m² +32% | 2013 |
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| Flat 2, 58, Tideswell Road339 m away | 51 m² | 77 m² | +26 m² +51% | 2025 |
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| Flat 5, Pegasus Court, 29, St Leonards Road701 m away | 43 m² | 69 m² | +26 m² +60% | 2023 |
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| 3, Susans Road239 m away | 79 m² | 105 m² | +26 m² +33% | 2017 |
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| 7, Moy Avenue981 m away | 113 m² | 139 m² | +26 m² +23% | 2016 |
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| 123, Tideswell Road234 m away | 131 m² | 157 m² | +26 m² +20% | 2014 |
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| Flat 6, Hadley House, Upperton Road962 m away | 85 m² | 111 m² | +26 m² +31% | 2013 |
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| Flat 5, Miramar House West, 2, Grand Parade226 m away | 44 m² | 70 m² | +26 m² +59% | 2012 |
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| 2, Barden Road804 m away | 73 m² | 98 m² | +25 m² +34% | 2026 |
|---|
| Flat 9, Metropole Court, Royal Parade254 m away | 99 m² | 124 m² | +25 m² +25% | 2023 |
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| 72, Whitley Road865 m away | 125 m² | 150 m² | +25 m² +20% | 2015 |
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| 20, Dursley Road485 m away | 63 m² | 88 m² | +25 m² +40% | 2014 |
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| 20, Eversfield Road864 m away | 39 m² | 64 m² | +25 m² +64% | 2010 |
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| 6, Marine Parade188 m away | 43 m² | 68 m² | +25 m² +58% | 2009 |
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| 8b, Willowfield Road229 m away | 68 m² | 92 m² | +24 m² +35% | 2023 |
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| 91, Langney Road130 m away | 122 m² | 146 m² | +24 m² +20% | 2022 |
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| Flat 4, Central Court, 13, South Street994 m away | 52 m² | 76 m² | +24 m² +46% | 2021 |
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| 48, Winchcombe Road514 m away | 72 m² | 96 m² | +24 m² +33% | 2019 |
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| 30, Carlton Road980 m away | 111 m² | 135 m² | +24 m² +22% | 2019 |
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| 68, Cavendish Avenue535 m away | 141 m² | 165 m² | +24 m² +17% | 2015 |
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| Flat 14, Eversfield House, The Avenue809 m away | 61 m² | 85 m² | +24 m² +39% | 2013 |
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| 122, Seaside Road78 m away | 29 m² | 53 m² | +24 m² +83% | 2012 |
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| 98a, Ashford Road438 m away | 63 m² | 87 m² | +24 m² +38% | 2011 |
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| 31, Pevensey Road169 m away | 30 m² | 54 m² | +24 m² +80% | 2009 |
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| 21, Pearl Court, Cornfield Terrace623 m away | 125 m² | 148 m² | +23 m² +18% | 2025 |
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| 12, Sheen Road463 m away | 71 m² | 94 m² | +23 m² +32% | 2024 |
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| 25, Firle Road505 m away | 74 m² | 97 m² | +23 m² +31% | 2023 |
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| 5, St Georges Road471 m away | 83 m² | 106 m² | +23 m² +28% | 2021 |
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| Flat 5, Thornwood, The Avenue867 m away | 51 m² | 74 m² | +23 m² +45% | 2021 |
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| 5, Eton Mews577 m away | 69 m² | 92 m² | +23 m² +33% | 2020 |
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| 24, Avondale Road679 m away | 73 m² | 96 m² | +23 m² +32% | 2013 |
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| Flat 2, 26b, Cavendish Place125 m away | 103 m² | 126 m² | +23 m² +22% | 2011 |
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| 105, Whitley Road721 m away | 132 m² | 154 m² | +22 m² +17% | 2026 |
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| Flat 4, 5, Compton Street634 m away | 38 m² | 60 m² | +22 m² +58% | 2024 |
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| Flat 2, Central Court, 13, South Street994 m away | 51 m² | 73 m² | +22 m² +43% | 2022 |
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| 7b, Bolton Road515 m away | 34 m² | 56 m² | +22 m² +65% | 2019 |
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| 17, Moy Avenue981 m away | 94 m² | 116 m² | +22 m² +23% | 2016 |
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| 43, Leslie Street688 m away | 79 m² | 101 m² | +22 m² +28% | 2013 |
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| Flat 5c, Clovelly, 20, Blackwater Road997 m away | 55 m² | 77 m² | +22 m² +40% | 2010 |
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| 4a, Wellesley Road275 m away | 59 m² | 80 m² | +21 m² +36% | 2025 |
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| Flat 8, Chartwell House, 1a, Wharf Road927 m away | 47 m² | 68 m² | +21 m² +45% | 2024 |
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| 16, Cavendish Avenue402 m away | 124 m² | 145 m² | +21 m² +17% | 2023 |
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| Flat 8, The Church, 16, Ceylon Place0 m away | 127 m² | 148 m² | +21 m² +17% | 2022 |
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| 65, Seaside Road213 m away | 30 m² | 51 m² | +21 m² +70% | 2021 |
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| Flat 10, Eversfield House, The Avenue809 m away | 64 m² | 85 m² | +21 m² +33% | 2013 |
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| 243, Terminus Road328 m away | 42 m² | 63 m² | +21 m² +50% | 2012 |
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| 30, Grove Road890 m away | 64 m² | 85 m² | +21 m² +33% | 2010 |
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| 3, Western Road624 m away | 82 m² | 102 m² | +20 m² +24% | 2020 |
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| 24, Belmore Road391 m away | 33 m² | 53 m² | +20 m² +61% | 2018 |
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| 11, Hyde Road905 m away | 39 m² | 59 m² | +20 m² +51% | 2018 |
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| 171, Terminus Road316 m away | 31 m² | 51 m² | +20 m² +65% | 2015 |
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| Flat 38, Westdown House, Hartington Place459 m away | 100 m² | 120 m² | +20 m² +20% | 2014 |
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| 1, Cambridge Road569 m away | 15 m² | 35 m² | +20 m² +133% | 2013 |
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| Flat 5, 159, Seaside652 m away | 25 m² | 45 m² | +20 m² +80% | 2013 |
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| 18, Upperton Gardens946 m away | 26 m² | 46 m² | +20 m² +77% | 2009 |
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| 38, Clarence Road844 m away | 98 m² | 117 m² | +19 m² +19% | 2026 |
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| Flat 1, 15, Ceylon Place33 m away | 53 m² | 72 m² | +19 m² +36% | 2025 |
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| Flat 1, 56, Grove Road974 m away | 45 m² | 64 m² | +19 m² +42% | 2024 |
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| 10, Bolton Road495 m away | 36 m² | 55 m² | +19 m² +53% | 2023 |
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| 2, Redoubt Road668 m away | 100 m² | 119 m² | +19 m² +19% | 2023 |
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| Flat 2, Stafford House, Southfields Road909 m away | 82 m² | 101 m² | +19 m² +23% | 2023 |
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| 4, Willowfield Square309 m away | 105 m² | 124 m² | +19 m² +18% | 2021 |
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| 25, Gildredge Road805 m away | 51 m² | 70 m² | +19 m² +37% | 2021 |
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| 17, Manifold Road515 m away | 87 m² | 106 m² | +19 m² +22% | 2019 |
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| 131a, Seaside563 m away | 24 m² | 43 m² | +19 m² +79% | 2019 |
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| Flat 11, Southdown Heights, 38, St Leonards Road680 m away | 35 m² | 54 m² | +19 m² +54% | 2019 |
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| Ground Floor, 122 - 134, Seaside346 m away | 51 m² | 70 m² | +19 m² +37% | 2013 |
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| 27, Longstone Road401 m away | 93 m² | 112 m² | +19 m² +20% | 2012 |
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| 13, The Avenue856 m away | 61 m² | 80 m² | +19 m² +31% | 2012 |
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| Flat 2, 11, Upper Avenue692 m away | 35 m² | 54 m² | +19 m² +54% | 2010 |
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| Flat 4, Birley House, 13, College Road939 m away | 62 m² | 80 m² | +18 m² +29% | 2023 |
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| 183, Langney Road237 m away | 40 m² | 58 m² | +18 m² +45% | 2022 |
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| Flat 1, 11, Upper Avenue692 m away | 91 m² | 109 m² | +18 m² +20% | 2021 |
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| Flat 3, 14, College Road915 m away | 44 m² | 62 m² | +18 m² +41% | 2021 |
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| 52, Longstone Road323 m away | 109 m² | 127 m² | +18 m² +17% | 2019 |
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| 25, Beltring Road643 m away | 83 m² | 101 m² | +18 m² +22% | 2018 |
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| Flat 10, Victoria Court, 24 - 26, Burlington Place701 m away | 48 m² | 66 m² | +18 m² +38% | 2018 |
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| Flat 16, Carew Court, 1, Carew Road818 m away | 83 m² | 101 m² | +18 m² +22% | 2018 |
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| 41, Pevensey Road169 m away | 37 m² | 55 m² | +18 m² +49% | 2016 |
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| 18, Susans Road239 m away | 39 m² | 57 m² | +18 m² +46% | 2010 |
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| 34, Grove Road890 m away | 44 m² | 61 m² | +17 m² +39% | 2026 |
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| Flat 56, Park Gates, Chiswick Place728 m away | 82 m² | 99 m² | +17 m² +21% | 2024 |
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| 9, Stanley Road768 m away | 86 m² | 103 m² | +17 m² +20% | 2022 |
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| Flat 2, Berkeley Court, 1 - 9, Wilmington Square981 m away | 66 m² | 83 m² | +17 m² +26% | 2022 |
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| 1, Elms Road283 m away | 42 m² | 59 m² | +17 m² +40% | 2020 |
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| 48, Avondale Road679 m away | 75 m² | 92 m² | +17 m² +23% | 2019 |
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| Flat 2, 5a, Ivy Terrace821 m away | 60 m² | 77 m² | +17 m² +28% | 2019 |
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| Flat 3, 13, Bedfordwell Road785 m away | 36 m² | 53 m² | +17 m² +47% | 2018 |
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| Flat 1, 9a, Spencer Road861 m away | 71 m² | 88 m² | +17 m² +24% | 2017 |
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| 6, Trinity Trees520 m away | 56 m² | 73 m² | +17 m² +30% | 2015 |
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| 30, Lushington Road714 m away | 27 m² | 44 m² | +17 m² +63% | 2010 |
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| 3, College Road939 m away | 94 m² | 111 m² | +17 m² +18% | 2010 |
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| 18 - 20, Trinity Trees413 m away | 67 m² | 84 m² | +17 m² +25% | 2009 |
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| 16, Redoubt Road668 m away | 87 m² | 103 m² | +16 m² +18% | 2025 |
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| 1, Chelsea Mews788 m away | 73 m² | 89 m² | +16 m² +22% | 2023 |
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| 1, St Georges Road471 m away | 66 m² | 82 m² | +16 m² +24% | 2022 |
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| 41, Moy Avenue981 m away | 97 m² | 113 m² | +16 m² +16% | 2022 |
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| Flat 3, Avenue Mansions, Elms Avenue270 m away | 68 m² | 84 m² | +16 m² +24% | 2021 |
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| Flat 4, 26, Bedfordwell Road864 m away | 79 m² | 95 m² | +16 m² +20% | 2020 |
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| Flat 1, Cambridge Court, Cambridge Road531 m away | 88 m² | 104 m² | +16 m² +18% | 2018 |
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| 89, Ashford Road438 m away | 96 m² | 112 m² | +16 m² +17% | 2013 |
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| 74, Langney Road89 m away | 42 m² | 58 m² | +16 m² +38% | 2009 |
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| 23, Lushington Road697 m away | 42 m² | 58 m² | +16 m² +38% | 2009 |
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| 66, Langney Road89 m away | 26 m² | 41 m² | +15 m² +58% | 2026 |
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| 4, Bath Road925 m away | 73 m² | 88 m² | +15 m² +21% | 2026 |
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| 10, Marine Road297 m away | 84 m² | 99 m² | +15 m² +18% | 2024 |
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| Flat 5, Spencer House, 8, Spencer Road834 m away | 38 m² | 53 m² | +15 m² +39% | 2023 |
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| Flat 4a, Spencer Court, Spencer Road853 m away | 72 m² | 87 m² | +15 m² +21% | 2023 |
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| Flat 2, Sussex House, Hartington Place509 m away | 71 m² | 86 m² | +15 m² +21% | 2020 |
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