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 BN1 3LB
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 |
|---|---|---|---|---|
| 3, Kingscote Way487 m away | 137 m² | 336 m² | +199 m² +145% | 2025 |
| 3, Windlesham Road647 m away | 181 m² | 326 m² | +145 m² +80% | 2016 |
| 46, Sillwood Road710 m away | 78 m² | 193 m² | +115 m² +147% | 2012 |
| 9, Clifton Hill398 m away | 96 m² | 209 m² | +113 m² +118% | 2016 |
| 22, Brunswick Road944 m away | 168 m² | 273 m² | +105 m² +63% | 2011 |
| 30, Cambridge Road975 m away | 274 m² | 373 m² | +99 m² +36% | 2021 |
| 29, Albion Hill937 m away | 78 m² | 176 m² | +98 m² +126% | 2025 |
| 54, Davigdor Road881 m away | 146 m² | 242 m² | +96 m² +66% | 2024 |
| 22, Buckingham Place423 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.
| 94 m² |
| 188 m² |
| +94 m² +100% |
| 2015 |
| 10, Montpelier Terrace578 m away | 207 m² | 296 m² | +89 m² +43% | 2012 |
|---|
| 13, Osmond Gardens708 m away | 70 m² | 157 m² | +87 m² +124% | 2010 |
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| Flat 3, 6, Stanford Road857 m away | 60 m² | 146 m² | +86 m² +143% | 2018 |
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| 99a, North Road390 m away | 95 m² | 179 m² | +84 m² +88% | 2020 |
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| 18, Stanford Road857 m away | 191 m² | 270 m² | +79 m² +41% | 2024 |
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| 40, Stanford Road857 m away | 189 m² | 263 m² | +74 m² +39% | 2023 |
|---|
| 33, Lancaster Road917 m away | 115 m² | 188 m² | +73 m² +63% | 2014 |
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| 58, Compton Avenue408 m away | 113 m² | 185 m² | +72 m² +64% | 2023 |
|---|
| 36, York Avenue794 m away | 272 m² | 342 m² | +70 m² +26% | 2021 |
|---|
| 93, Addison Road938 m away | 110 m² | 179 m² | +69 m² +63% | 2023 |
|---|
| 26, Osmond Road708 m away | 257 m² | 325 m² | +68 m² +26% | 2013 |
|---|
| 11, Holland Street951 m away | 59 m² | 126 m² | +67 m² +114% | 2023 |
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| 55, Old Shoreham Road713 m away | 59 m² | 124 m² | +65 m² +110% | 2011 |
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| 54, George Street829 m away | 105 m² | 167 m² | +62 m² +59% | 2019 |
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| 36, Stroudley Road675 m away | 74 m² | 135 m² | +61 m² +82% | 2011 |
|---|
| 16, Bedford Place829 m away | 45 m² | 105 m² | +60 m² +133% | 2011 |
|---|
| The Albemarle, Marine Parade899 m away | 53 m² | 112 m² | +59 m² +111% | 2011 |
|---|
| 2, Crown Gardens124 m away | 52 m² | 109 m² | +57 m² +110% | 2023 |
|---|
| 50, Viaduct Road854 m away | 60 m² | 117 m² | +57 m² +95% | 2020 |
|---|
| 21, Hanover Crescent984 m away | 167 m² | 224 m² | +57 m² +34% | 2020 |
|---|
| 2, Norfolk Road810 m away | 56 m² | 112 m² | +56 m² +100% | 2015 |
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| 7, Howard Place554 m away | 51 m² | 107 m² | +56 m² +110% | 2008 |
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| 28 - 29, Richmond Place627 m away | 68 m² | 122 m² | +54 m² +79% | 2024 |
|---|
| Flat 4, 50, Cambridge Road975 m away | 67 m² | 121 m² | +54 m² +81% | 2015 |
|---|
| Flat 20, Avalon, West Street555 m away | 56 m² | 109 m² | +53 m² +95% | 2019 |
|---|
| 86a, St James'S Street977 m away | 38 m² | 91 m² | +53 m² +139% | 2019 |
|---|
| 5, Howard Place554 m away | 41 m² | 94 m² | +53 m² +129% | 2018 |
|---|
| 48, Sillwood Street880 m away | 43 m² | 96 m² | +53 m² +123% | 2015 |
|---|
| 21, Powis Square407 m away | 50 m² | 102 m² | +52 m² +104% | 2021 |
|---|
| 13, Clifton Terrace291 m away | 64 m² | 116 m² | +52 m² +81% | 2020 |
|---|
| 44, Victoria Street430 m away | 94 m² | 146 m² | +52 m² +55% | 2014 |
|---|
| Book House, 25, Marlborough Place482 m away | 45 m² | 96 m² | +51 m² +113% | 2023 |
|---|
| The Mucky Duck, 7 - 9, Manchester Street864 m away | 65 m² | 116 m² | +51 m² +78% | 2020 |
|---|
| First Floor Flat, 21, Alexandra Villas198 m away | 77 m² | 128 m² | +51 m² +66% | 2019 |
|---|
| 2, Guildford Street155 m away | 58 m² | 109 m² | +51 m² +88% | 2010 |
|---|
| 22a, Campbell Road846 m away | 65 m² | 115 m² | +50 m² +77% | 2020 |
|---|
| 1, Ditchling Rise979 m away | 54 m² | 104 m² | +50 m² +93% | 2015 |
|---|
| 35, Baker Street776 m away | 93 m² | 141 m² | +48 m² +52% | 2024 |
|---|
| 5, Powis Road462 m away | 34 m² | 82 m² | +48 m² +141% | 2020 |
|---|
| 13, Western Street974 m away | 36 m² | 84 m² | +48 m² +133% | 2017 |
|---|
| 3, Clarence Square472 m away | 54 m² | 102 m² | +48 m² +89% | 2009 |
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| 27, Colbourne Road931 m away | 122 m² | 169 m² | +47 m² +39% | 2025 |
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| 76, Rose Hill Terrace794 m away | 43 m² | 90 m² | +47 m² +109% | 2009 |
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| 25b, Buckingham Place476 m away | 63 m² | 109 m² | +46 m² +73% | 2022 |
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| 4, Highdown Road841 m away | 79 m² | 125 m² | +46 m² +58% | 2022 |
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| 39, Osmond Road811 m away | 176 m² | 222 m² | +46 m² +26% | 2021 |
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| 12, Montpelier Road805 m away | 76 m² | 122 m² | +46 m² +61% | 2019 |
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| 10, Wolstonbury Road971 m away | 126 m² | 172 m² | +46 m² +37% | 2013 |
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| 20, Guildford Road236 m away | 42 m² | 87 m² | +45 m² +107% | 2023 |
|---|
| 20, Montpelier Road805 m away | 50 m² | 95 m² | +45 m² +90% | 2016 |
|---|
| 16, Abbotts, 129, Kings Road730 m away | 226 m² | 271 m² | +45 m² +20% | 2015 |
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| 4, Davigdor Road684 m away | 112 m² | 156 m² | +44 m² +39% | 2024 |
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| 50, Belgrave Street878 m away | 70 m² | 114 m² | +44 m² +63% | 2022 |
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| 115, Addison Road938 m away | 118 m² | 162 m² | +44 m² +37% | 2022 |
|---|
| 22b, Dyke Road200 m away | 42 m² | 86 m² | +44 m² +105% | 2018 |
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| Flat 96, Embankment House, 7, Fleet Street506 m away | 78 m² | 122 m² | +44 m² +56% | 2015 |
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| Flat 30, Old College House, 8 - 10, Richmond Terrace811 m away | 142 m² | 185 m² | +43 m² +30% | 2020 |
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| 20, Beaconsfield Road923 m away | 51 m² | 94 m² | +43 m² +84% | 2016 |
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| 7a, St Georges Place516 m away | 57 m² | 99 m² | +42 m² +74% | 2021 |
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| 21, Viaduct Road830 m away | 91 m² | 133 m² | +42 m² +46% | 2021 |
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| 16, Kew Street96 m away | 71 m² | 113 m² | +42 m² +59% | 2018 |
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| Flat 2, Kemptown House, 72, Carlton Hill875 m away | 64 m² | 106 m² | +42 m² +66% | 2018 |
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| 2, Norfolk Square911 m away | 52 m² | 94 m² | +42 m² +81% | 2016 |
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| 41, Osmond Road811 m away | 165 m² | 207 m² | +42 m² +25% | 2010 |
|---|
| 35a, Colbourne Road931 m away | 59 m² | 100 m² | +41 m² +69% | 2026 |
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| 12a, Granville Road761 m away | 74 m² | 115 m² | +41 m² +55% | 2022 |
|---|
| 30, Clifton Street319 m away | 100 m² | 141 m² | +41 m² +41% | 2021 |
|---|
| 20, Madeira Place937 m away | 39 m² | 80 m² | +41 m² +105% | 2021 |
|---|
| 16, Ditchling Rise979 m away | 94 m² | 135 m² | +41 m² +44% | 2021 |
|---|
| 52, Viaduct Road854 m away | 100 m² | 141 m² | +41 m² +41% | 2019 |
|---|
| 23, St Nicholas Road96 m away | 35 m² | 76 m² | +41 m² +117% | 2018 |
|---|
| 1, Powis Road462 m away | 92 m² | 133 m² | +41 m² +45% | 2017 |
|---|
| Flat 4, 10, Montpelier Road805 m away | 30 m² | 70 m² | +40 m² +133% | 2026 |
|---|
| Flat 3, 22, Denmark Terrace550 m away | 28 m² | 68 m² | +40 m² +143% | 2024 |
|---|
| 2, Caburn Road921 m away | 133 m² | 173 m² | +40 m² +30% | 2018 |
|---|
| 107, Addison Road938 m away | 45 m² | 85 m² | +40 m² +89% | 2018 |
|---|
| 34, Lancaster Road917 m away | 117 m² | 156 m² | +39 m² +33% | 2024 |
|---|
| 14a, Cross Street953 m away | 75 m² | 114 m² | +39 m² +52% | 2023 |
|---|
| 75a, Hanover Street998 m away | 83 m² | 122 m² | +39 m² +47% | 2023 |
|---|
| Flat 1, 48, Buckingham Place423 m away | 29 m² | 68 m² | +39 m² +134% | 2019 |
|---|
| 29a, Norfolk Road784 m away | 45 m² | 84 m² | +39 m² +87% | 2019 |
|---|
| 3, York Grove669 m away | 37 m² | 76 m² | +39 m² +105% | 2013 |
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| 49, Surrey Street151 m away | 105 m² | 144 m² | +39 m² +37% | 2010 |
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| 7, Western Road939 m away | 34 m² | 73 m² | +39 m² +115% | 2010 |
|---|
| 9, Howard Place554 m away | 45 m² | 83 m² | +38 m² +84% | 2025 |
|---|
| 19, Stone Street558 m away | 46 m² | 84 m² | +38 m² +83% | 2025 |
|---|
| Flat 3, 51, Montpelier Road681 m away | 43 m² | 81 m² | +38 m² +88% | 2023 |
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| 10, Park Royal, 66, Montpelier Road711 m away | 79 m² | 117 m² | +38 m² +48% | 2022 |
|---|
| 4, Clarence Square472 m away | 53 m² | 91 m² | +38 m² +72% | 2017 |
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| 9, Old Shoreham Road713 m away | 91 m² | 129 m² | +38 m² +42% | 2014 |
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| 28, Buckingham Street158 m away | 43 m² | 81 m² | +38 m² +88% | 2012 |
|---|
| 40, Regency Square600 m away | 39 m² | 77 m² | +38 m² +97% | 2010 |
|---|
| 1, Hanover Crescent984 m away | 227 m² | 265 m² | +38 m² +17% | 2010 |
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| 28, Jersey Street919 m away | 108 m² | 145 m² | +37 m² +34% | 2026 |
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| 19, George Street813 m away | 70 m² | 107 m² | +37 m² +53% | 2020 |
|---|
| 57, Viaduct Road854 m away | 36 m² | 73 m² | +37 m² +103% | 2014 |
|---|
| 18, Western Street974 m away | 94 m² | 131 m² | +37 m² +39% | 2013 |
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| 36, Vernon Terrace557 m away | 51 m² | 88 m² | +37 m² +73% | 2011 |
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| 1, Argyle Road820 m away | 66 m² | 103 m² | +37 m² +56% | 2011 |
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| 91, Southover Street971 m away | 89 m² | 125 m² | +36 m² +40% | 2026 |
|---|
| 15, Wolstonbury Road971 m away | 122 m² | 158 m² | +36 m² +30% | 2020 |
|---|
| Flat 88, Embankment House, 7, Fleet Street506 m away | 70 m² | 106 m² | +36 m² +51% | 2015 |
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| 35, Beaconsfield Road923 m away | 91 m² | 127 m² | +36 m² +40% | 2013 |
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| 16, Victoria Street449 m away | 84 m² | 120 m² | +36 m² +43% | 2012 |
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| 27, Queens Road115 m away | 58 m² | 94 m² | +36 m² +62% | 2010 |
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| 6, St Georges Place516 m away | 46 m² | 82 m² | +36 m² +78% | 2010 |
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| 15, Buckingham Street158 m away | 127 m² | 162 m² | +35 m² +28% | 2024 |
|---|
| 33, Montpelier Road805 m away | 44 m² | 79 m² | +35 m² +80% | 2024 |
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| 49, Richmond Street929 m away | 102 m² | 137 m² | +35 m² +34% | 2024 |
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| 21, Tidy Street333 m away | 38 m² | 73 m² | +35 m² +92% | 2023 |
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| 3a, Bond Street407 m away | 138 m² | 173 m² | +35 m² +25% | 2022 |
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| 19, Ditchling Rise979 m away | 163 m² | 198 m² | +35 m² +21% | 2019 |
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| 3, Bedford Place829 m away | 56 m² | 91 m² | +35 m² +63% | 2016 |
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| 56, Cambridge Road975 m away | 33 m² | 68 m² | +35 m² +106% | 2016 |
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| 7, Melville Road649 m away | 48 m² | 83 m² | +35 m² +73% | 2011 |
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| Flat 4, 55, Addison Road804 m away | 39 m² | 74 m² | +35 m² +90% | 2010 |
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| 3, St Michaels Place517 m away | 41 m² | 76 m² | +35 m² +85% | 2009 |
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| 102, Addison Road937 m away | 111 m² | 145 m² | +34 m² +31% | 2024 |
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| 14, Kew Street96 m away | 98 m² | 132 m² | +34 m² +35% | 2023 |
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| 1, Hamilton Road844 m away | 121 m² | 155 m² | +34 m² +28% | 2023 |
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| 7, Western Terrace705 m away | 153 m² | 187 m² | +34 m² +22% | 2019 |
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| 67b, Buckingham Road338 m away | 33 m² | 67 m² | +34 m² +103% | 2016 |
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| 7, Castle Street575 m away | 62 m² | 96 m² | +34 m² +55% | 2015 |
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| 12, Abbotts, 129, Kings Road730 m away | 112 m² | 146 m² | +34 m² +30% | 2013 |
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| 60, Old Shoreham Road765 m away | 41 m² | 75 m² | +34 m² +83% | 2012 |
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| 18, New England Road662 m away | 46 m² | 80 m² | +34 m² +74% | 2009 |
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| 5, Guildford Road216 m away | 68 m² | 101 m² | +33 m² +49% | 2024 |
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| 3, Old Shoreham Road713 m away | 60 m² | 93 m² | +33 m² +55% | 2024 |
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| 1, Stanford Road893 m away | 45 m² | 78 m² | +33 m² +73% | 2024 |
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| 39, Holland Street951 m away | 87 m² | 120 m² | +33 m² +38% | 2024 |
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| 14, Wolstonbury Road971 m away | 146 m² | 179 m² | +33 m² +23% | 2024 |
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| Flat 4, The Old Church Hall, 15, Ditchling Rise979 m away | 87 m² | 120 m² | +33 m² +38% | 2021 |
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| 14, London Road610 m away | 31 m² | 64 m² | +33 m² +106% | 2020 |
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| 79, Addison Road938 m away | 141 m² | 174 m² | +33 m² +23% | 2018 |
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| 38, Clifton Street319 m away | 84 m² | 117 m² | +33 m² +39% | 2017 |
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| 9, Grand Parade589 m away | 50 m² | 83 m² | +33 m² +66% | 2014 |
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| 84, Addison Road937 m away | 116 m² | 148 m² | +32 m² +28% | 2024 |
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| 33, Trafalgar Lane302 m away | 75 m² | 107 m² | +32 m² +43% | 2019 |
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| 45, Argyle Road814 m away | 100 m² | 132 m² | +32 m² +32% | 2019 |
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| 2, Abbotts, 129, Kings Road730 m away | 96 m² | 128 m² | +32 m² +33% | 2013 |
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| 64, Clyde Road960 m away | 129 m² | 160 m² | +31 m² +24% | 2026 |
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| 10, Winchester Street981 m away | 78 m² | 109 m² | +31 m² +40% | 2025 |
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| 24, York Villas686 m away | 54 m² | 85 m² | +31 m² +57% | 2024 |
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| 64, Viaduct Road854 m away | 89 m² | 120 m² | +31 m² +35% | 2023 |
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| 20, Ditchling Rise979 m away | 97 m² | 128 m² | +31 m² +32% | 2023 |
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| 2865 m away | 66 m² | 97 m² | +31 m² +47% | 2022 |
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| 3, Windmill Street993 m away | 76 m² | 107 m² | +31 m² +41% | 2022 |
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| 7, York Grove669 m away | 104 m² | 135 m² | +31 m² +30% | 2019 |
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| 10, Dorset Gardens881 m away | 30 m² | 61 m² | +31 m² +103% | 2017 |
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| 10, London Terrace748 m away | 112 m² | 143 m² | +31 m² +28% | 2016 |
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| 34, Waterloo Street998 m away | 40 m² | 71 m² | +31 m² +78% | 2016 |
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| 6, Caburn Road921 m away | 132 m² | 162 m² | +30 m² +23% | 2026 |
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| 2, Davigdor Road684 m away | 67 m² | 97 m² | +30 m² +45% | 2025 |
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| 18, Princes Street702 m away | 133 m² | 163 m² | +30 m² +23% | 2020 |
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| 2, Belgrave Street878 m away | 77 m² | 107 m² | +30 m² +39% | 2020 |
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| 7, Campbell Road846 m away | 112 m² | 142 m² | +30 m² +27% | 2019 |
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| 15, Blaker Street925 m away | 94 m² | 124 m² | +30 m² +32% | 2015 |
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| Flat 3, 29, Chatham Place586 m away | 33 m² | 63 m² | +30 m² +91% | 2013 |
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| Flat 2, 4, Compton Avenue383 m away | 36 m² | 65 m² | +29 m² +81% | 2026 |
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| 6, Regency Square728 m away | 54 m² | 83 m² | +29 m² +54% | 2025 |
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| 2a, Nile Street617 m away | 27 m² | 56 m² | +29 m² +107% | 2024 |
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| 44, Holland Street951 m away | 87 m² | 116 m² | +29 m² +33% | 2024 |
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| 23, Bath Street526 m away | 58 m² | 87 m² | +29 m² +50% | 2023 |
|---|
| 12, Belgrave Street878 m away | 74 m² | 103 m² | +29 m² +39% | 2021 |
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| 23, Holland Street951 m away | 59 m² | 88 m² | +29 m² +49% | 2018 |
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| 20, Argyle Road820 m away | 95 m² | 124 m² | +29 m² +31% | 2017 |
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| 30, Jersey Street919 m away | 73 m² | 102 m² | +29 m² +40% | 2014 |
|---|
| 70, Grand Parade631 m away | 54 m² | 83 m² | +29 m² +54% | 2010 |
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| 25, Bedford Square871 m away | 23 m² | 52 m² | +29 m² +126% | 2009 |
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| 48, Upper North Street411 m away | 94 m² | 122 m² | +28 m² +30% | 2026 |
|---|
| 1, Montpelier Road805 m away | 67 m² | 95 m² | +28 m² +42% | 2025 |
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| 20a, Sussex Heights656 m away | 89 m² | 117 m² | +28 m² +31% | 2024 |
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| 23, Old Shoreham Road713 m away | 95 m² | 123 m² | +28 m² +29% | 2024 |
|---|
| 32, West Hill Road284 m away | 175 m² | 203 m² | +28 m² +16% | 2019 |
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| 5, Belmont Court729 m away | 83 m² | 111 m² | +28 m² +34% | 2019 |
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| 34, Brigden Street790 m away | 87 m² | 115 m² | +28 m² +32% | 2019 |
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| 23, Cheltenham Place441 m away | 63 m² | 91 m² | +28 m² +44% | 2013 |
|---|
| Flat 4, 68, Buckingham Road179 m away | 54 m² | 81 m² | +27 m² +50% | 2024 |
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| 33, Old Shoreham Road713 m away | 88 m² | 115 m² | +27 m² +31% | 2024 |
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| 17, Hanover Crescent984 m away | 150 m² | 177 m² | +27 m² +18% | 2024 |
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| 19, Portland Street299 m away | 48 m² | 75 m² | +27 m² +56% | 2023 |
|---|
| 16, Tidy Street333 m away | 100 m² | 127 m² | +27 m² +27% | 2022 |
|---|
| 10, Kensington Place310 m away | 86 m² | 113 m² | +27 m² +31% | 2021 |
|---|
| 47, Sillwood Street880 m away | 112 m² | 139 m² | +27 m² +24% | 2020 |
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| 42, Stanley Road889 m away | 112 m² | 139 m² | +27 m² +24% | 2020 |
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| 25, Brunswick Road944 m away | 56 m² | 83 m² | +27 m² +48% | 2020 |
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| Flat 2, 11, Compton Avenue419 m away | 64 m² | 91 m² | +27 m² +42% | 2019 |
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| 10, Dorset Street781 m away | 35 m² | 62 m² | +27 m² +77% | 2019 |
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| 32a, Buckingham Street158 m away | 54 m² | 81 m² | +27 m² +50% | 2018 |
|---|
| 20, Robert Street377 m away | 38 m² | 65 m² | +27 m² +71% | 2016 |
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| 21, Russell Square537 m away | 30 m² | 57 m² | +27 m² +90% | 2011 |
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