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 BN3 4QJ
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 |
|---|---|---|---|---|
| 5, Western Esplanade572 m away | 132 m² | 268 m² | +136 m² +103% | 2024 |
| 5, Tandridge Road596 m away | 89 m² | 206 m² | +117 m² +131% | 2014 |
| 4a, Mansfield Road654 m away | 90 m² | 203 m² | +113 m² +126% | 2020 |
| 3, Tandridge Road596 m away | 83 m² | 182 m² | +99 m² +119% | 2022 |
| 237, New Church Road210 m away | 106 m² | 204 m² | +98 m² +92% | 2015 |
| 303, Kingsway638 m away | 125 m² | 222 m² | +97 m² +78% | 2021 |
| 5, Portland Avenue685 m away | 81 m² | 175 m² | +94 m² +116% | 2017 |
| 13, St Keyna Avenue198 m away | 143 m² | 235 m² | +92 m² +64% | 2024 |
| 15, Gladys Road693 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.
| 112 m² |
| 200 m² |
| +88 m² +79% |
| 2025 |
| 368, Old Shoreham Road853 m away | 115 m² | 201 m² | +86 m² +75% | 2019 |
|---|
| 33, Coleman Avenue920 m away | 137 m² | 220 m² | +83 m² +61% | 2022 |
|---|
| 16, Welbeck Avenue896 m away | 159 m² | 236 m² | +77 m² +48% | 2025 |
|---|
| 40, Welbeck Avenue881 m away | 149 m² | 226 m² | +77 m² +52% | 2019 |
|---|
| 21, Portland Villas474 m away | 85 m² | 162 m² | +77 m² +91% | 2016 |
|---|
| 9, Tandridge Road596 m away | 77 m² | 154 m² | +77 m² +100% | 2014 |
|---|
| 25, St Richards Road817 m away | 77 m² | 153 m² | +76 m² +99% | 2013 |
|---|
| 14, Wish Road825 m away | 60 m² | 134 m² | +74 m² +123% | 2025 |
|---|
| 24, St Leonards Gardens89 m away | 80 m² | 153 m² | +73 m² +91% | 2025 |
|---|
| 10, Glastonbury Road288 m away | 117 m² | 190 m² | +73 m² +62% | 2024 |
|---|
| 39, Leicester Villas320 m away | 159 m² | 232 m² | +73 m² +46% | 2024 |
|---|
| Flat 2, 36, Station Road225 m away | 61 m² | 132 m² | +71 m² +116% | 2019 |
|---|
| 11, Portland Villas474 m away | 88 m² | 158 m² | +70 m² +80% | 2017 |
|---|
| 27, Jesmond Road641 m away | 109 m² | 177 m² | +68 m² +62% | 2023 |
|---|
| 77, St Andrews Road494 m away | 109 m² | 172 m² | +63 m² +58% | 2026 |
|---|
| 25, Links Road658 m away | 86 m² | 149 m² | +63 m² +73% | 2020 |
|---|
| 33, Jesmond Road641 m away | 93 m² | 156 m² | +63 m² +68% | 2015 |
|---|
| 14, Berriedale Avenue975 m away | 172 m² | 234 m² | +62 m² +36% | 2025 |
|---|
| 36, Rothbury Road526 m away | 98 m² | 159 m² | +61 m² +62% | 2024 |
|---|
| 25, Portland Villas474 m away | 114 m² | 175 m² | +61 m² +54% | 2020 |
|---|
| 27, St Keyna Avenue198 m away | 106 m² | 167 m² | +61 m² +58% | 2011 |
|---|
| 27, Gordon Road403 m away | 68 m² | 128 m² | +60 m² +88% | 2020 |
|---|
| 76, St Leonards Gardens89 m away | 108 m² | 168 m² | +60 m² +56% | 2016 |
|---|
| 12, Welbeck Avenue896 m away | 134 m² | 193 m² | +59 m² +44% | 2026 |
|---|
| 3, Brittany Road400 m away | 83 m² | 142 m² | +59 m² +71% | 2018 |
|---|
| 110, Victoria Road813 m away | 80 m² | 139 m² | +59 m² +74% | 2015 |
|---|
| 3, Portland Villas474 m away | 104 m² | 162 m² | +58 m² +56% | 2012 |
|---|
| 11, Victoria Road538 m away | 40 m² | 98 m² | +58 m² +145% | 2012 |
|---|
| 9, Worcester Villas330 m away | 56 m² | 113 m² | +57 m² +102% | 2021 |
|---|
| 154a, New Church Road707 m away | 152 m² | 208 m² | +56 m² +37% | 2022 |
|---|
| 22, Tennis Road741 m away | 89 m² | 144 m² | +55 m² +62% | 2022 |
|---|
| 24, Wish Road825 m away | 78 m² | 133 m² | +55 m² +71% | 2020 |
|---|
| 326, Portland Road683 m away | 98 m² | 153 m² | +55 m² +56% | 2014 |
|---|
| 38, Portland Avenue749 m away | 109 m² | 163 m² | +54 m² +50% | 2021 |
|---|
| 23, Portland Avenue777 m away | 129 m² | 183 m² | +54 m² +42% | 2017 |
|---|
| 1, St Andrews Road317 m away | 126 m² | 180 m² | +54 m² +43% | 2016 |
|---|
| 15, Middleton Avenue262 m away | 124 m² | 177 m² | +53 m² +43% | 2012 |
|---|
| 50, Mansfield Road654 m away | 123 m² | 174 m² | +51 m² +41% | 2025 |
|---|
| 14, Saxon Road528 m away | 156 m² | 207 m² | +51 m² +33% | 2020 |
|---|
| 44, St Leonards Gardens89 m away | 79 m² | 129 m² | +50 m² +63% | 2023 |
|---|
| 14, St Keyna Avenue161 m away | 108 m² | 158 m² | +50 m² +46% | 2016 |
|---|
| 37, Mansfield Road709 m away | 56 m² | 105 m² | +49 m² +88% | 2025 |
|---|
| 297, Kingsway750 m away | 50 m² | 99 m² | +49 m² +98% | 2022 |
|---|
| 58, St Keyna Avenue161 m away | 103 m² | 152 m² | +49 m² +48% | 2016 |
|---|
| 46, St Leonards Gardens89 m away | 77 m² | 126 m² | +49 m² +64% | 2015 |
|---|
| 197, New Church Road243 m away | 178 m² | 227 m² | +49 m² +28% | 2012 |
|---|
| 411, Portland Road486 m away | 102 m² | 149 m² | +47 m² +46% | 2020 |
|---|
| 206, New Church Road314 m away | 113 m² | 160 m² | +47 m² +42% | 2016 |
|---|
| 51, Trafalgar Road905 m away | 75 m² | 121 m² | +46 m² +61% | 2026 |
|---|
| 47, Eastbrook Road715 m away | 73 m² | 119 m² | +46 m² +63% | 2025 |
|---|
| 9, Benfield Way936 m away | 107 m² | 153 m² | +46 m² +43% | 2024 |
|---|
| 65, St Leonards Road106 m away | 46 m² | 92 m² | +46 m² +100% | 2016 |
|---|
| 38, Woodhouse Road820 m away | 64 m² | 110 m² | +46 m² +72% | 2014 |
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| 72, Vale Road526 m away | 53 m² | 98 m² | +45 m² +85% | 2026 |
|---|
| 9, Links Road658 m away | 78 m² | 123 m² | +45 m² +58% | 2026 |
|---|
| 15, St Keyna Avenue198 m away | 131 m² | 176 m² | +45 m² +34% | 2018 |
|---|
| 21, Glebe Villas402 m away | 108 m² | 153 m² | +45 m² +42% | 2016 |
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| 83, St Leonards Road84 m away | 88 m² | 133 m² | +45 m² +51% | 2015 |
|---|
| 8, Margery Road754 m away | 93 m² | 137 m² | +44 m² +47% | 2025 |
|---|
| 71, St Leonards Gardens120 m away | 91 m² | 135 m² | +44 m² +48% | 2024 |
|---|
| 1, Welbeck Avenue930 m away | 176 m² | 220 m² | +44 m² +25% | 2021 |
|---|
| 165, New Church Road603 m away | 131 m² | 175 m² | +44 m² +34% | 2013 |
|---|
| 54, Trafalgar Road922 m away | 40 m² | 84 m² | +44 m² +110% | 2011 |
|---|
| 52, Brittany Road366 m away | 155 m² | 198 m² | +43 m² +28% | 2024 |
|---|
| 8, Roman Road442 m away | 117 m² | 160 m² | +43 m² +37% | 2024 |
|---|
| 52, St Leonards Gardens89 m away | 83 m² | 126 m² | +43 m² +52% | 2017 |
|---|
| 5, Brittany Road400 m away | 98 m² | 140 m² | +42 m² +43% | 2023 |
|---|
| 3, Woodhouse Road836 m away | 135 m² | 177 m² | +42 m² +31% | 2023 |
|---|
| 41, Derek Avenue327 m away | 123 m² | 165 m² | +42 m² +34% | 2012 |
|---|
| 29, Brittany Road400 m away | 112 m² | 154 m² | +42 m² +38% | 2012 |
|---|
| 51, St Andrews Road317 m away | 56 m² | 98 m² | +42 m² +75% | 2011 |
|---|
| 340, Portland Road683 m away | 96 m² | 137 m² | +41 m² +43% | 2026 |
|---|
| 16, Church Road613 m away | 93 m² | 134 m² | +41 m² +44% | 2023 |
|---|
| 19, Norman Road681 m away | 53 m² | 94 m² | +41 m² +77% | 2023 |
|---|
| 158, New Church Road707 m away | 191 m² | 231 m² | +40 m² +21% | 2021 |
|---|
| 8b, Marine Avenue611 m away | 72 m² | 112 m² | +40 m² +56% | 2020 |
|---|
| 16, Park Avenue954 m away | 174 m² | 213 m² | +39 m² +22% | 2025 |
|---|
| 38, Berriedale Avenue961 m away | 125 m² | 164 m² | +39 m² +31% | 2020 |
|---|
| 6, Glendor Road770 m away | 113 m² | 152 m² | +39 m² +35% | 2013 |
|---|
| 31, Portland Villas474 m away | 138 m² | 177 m² | +39 m² +28% | 2012 |
|---|
| 145, St Leonards Avenue0 m away | 90 m² | 128 m² | +38 m² +42% | 2024 |
|---|
| 26, Boundary Road157 m away | 46 m² | 84 m² | +38 m² +83% | 2020 |
|---|
| 11, Elm Road952 m away | 54 m² | 92 m² | +38 m² +70% | 2019 |
|---|
| 32, St Andrews Road272 m away | 42 m² | 80 m² | +38 m² +90% | 2015 |
|---|
| 22, Shelldale Road933 m away | 97 m² | 134 m² | +37 m² +38% | 2026 |
|---|
| 28, Erroll Road57 m away | 37 m² | 74 m² | +37 m² +100% | 2021 |
|---|
| 212, New Church Road314 m away | 122 m² | 159 m² | +37 m² +30% | 2019 |
|---|
| 1, Kenton Road265 m away | 149 m² | 186 m² | +37 m² +25% | 2013 |
|---|
| 48, Portland Villas454 m away | 123 m² | 159 m² | +36 m² +29% | 2023 |
|---|
| 54, Brittany Road366 m away | 122 m² | 158 m² | +36 m² +30% | 2012 |
|---|
| 110, Hallyburton Road586 m away | 105 m² | 140 m² | +35 m² +33% | 2026 |
|---|
| 29, Welbeck Avenue930 m away | 198 m² | 233 m² | +35 m² +18% | 2026 |
|---|
| 60, St Andrews Road453 m away | 95 m² | 129 m² | +34 m² +36% | 2026 |
|---|
| 87, St Leonards Avenue0 m away | 91 m² | 125 m² | +34 m² +37% | 2025 |
|---|
| 5, Elm Road952 m away | 91 m² | 125 m² | +34 m² +37% | 2025 |
|---|
| 13, Chelston Avenue408 m away | 116 m² | 150 m² | +34 m² +29% | 2020 |
|---|
| 259, Old Shoreham Road749 m away | 147 m² | 181 m² | +34 m² +23% | 2018 |
|---|
| 1, Garden Close676 m away | 42 m² | 75 m² | +33 m² +79% | 2026 |
|---|
| 20, Vale Road418 m away | 91 m² | 124 m² | +33 m² +36% | 2024 |
|---|
| 1a, North Street390 m away | 30 m² | 63 m² | +33 m² +110% | 2020 |
|---|
| 122, Victoria Road813 m away | 93 m² | 126 m² | +33 m² +35% | 2016 |
|---|
| 366, Portland Road591 m away | 92 m² | 125 m² | +33 m² +36% | 2015 |
|---|
| 18, Norway Street433 m away | 88 m² | 120 m² | +32 m² +36% | 2021 |
|---|
| 6, Denmark Road473 m away | 78 m² | 110 m² | +32 m² +41% | 2019 |
|---|
| 7, Roman Road478 m away | 96 m² | 128 m² | +32 m² +33% | 2016 |
|---|
| 12, Brambledean Road759 m away | 85 m² | 116 m² | +31 m² +36% | 2025 |
|---|
| 107, St Leonards Road84 m away | 102 m² | 133 m² | +31 m² +30% | 2023 |
|---|
| 110, New Church Road923 m away | 136 m² | 167 m² | +31 m² +23% | 2016 |
|---|
| 3a, Portland Avenue685 m away | 61 m² | 92 m² | +31 m² +51% | 2013 |
|---|
| 20, Shelldale Road933 m away | 46 m² | 77 m² | +31 m² +67% | 2013 |
|---|
| 1, Wellington Road362 m away | 47 m² | 77 m² | +30 m² +64% | 2026 |
|---|
| 35, St Aubyns Road285 m away | 53 m² | 83 m² | +30 m² +57% | 2020 |
|---|
| 65, St Leonards Gardens120 m away | 100 m² | 130 m² | +30 m² +30% | 2013 |
|---|
| 5, Benfield Close1000 m away | 88 m² | 118 m² | +30 m² +34% | 2012 |
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| 78, St Andrews Road453 m away | 119 m² | 148 m² | +29 m² +24% | 2023 |
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| 168, St Leonards Avenue37 m away | 93 m² | 121 m² | +28 m² +30% | 2026 |
|---|
| 49, Woodhouse Road836 m away | 108 m² | 136 m² | +28 m² +26% | 2026 |
|---|
| 170, St Leonards Avenue37 m away | 92 m² | 120 m² | +28 m² +30% | 2024 |
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| 59, Portland Villas474 m away | 103 m² | 131 m² | +28 m² +27% | 2024 |
|---|
| 50, St Richards Road817 m away | 78 m² | 106 m² | +28 m² +36% | 2021 |
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| 356, Portland Road683 m away | 129 m² | 157 m² | +28 m² +22% | 2018 |
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| 18, St Andrews Road272 m away | 58 m² | 86 m² | +28 m² +48% | 2016 |
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| 18, Albion Street502 m away | 100 m² | 127 m² | +27 m² +27% | 2022 |
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| 13, Lincoln Road783 m away | 79 m² | 106 m² | +27 m² +34% | 2020 |
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| 10, Denmark Road473 m away | 83 m² | 109 m² | +26 m² +31% | 2025 |
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| 6, North Street295 m away | 32 m² | 58 m² | +26 m² +81% | 2024 |
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| 10, Brambledean Road759 m away | 92 m² | 118 m² | +26 m² +28% | 2024 |
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| 281, Old Shoreham Road749 m away | 90 m² | 116 m² | +26 m² +29% | 2023 |
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| 39, Brittany Road400 m away | 123 m² | 149 m² | +26 m² +21% | 2022 |
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| 73, Worcester Villas330 m away | 112 m² | 138 m² | +26 m² +23% | 2021 |
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| 122, St Leonards Avenue37 m away | 49 m² | 75 m² | +26 m² +53% | 2020 |
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| 6, Brittany Road366 m away | 92 m² | 118 m² | +26 m² +28% | 2020 |
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| 45, Hangleton Road934 m away | 140 m² | 166 m² | +26 m² +19% | 2016 |
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| 16, Mornington Mansions, New Church Road510 m away | 58 m² | 84 m² | +26 m² +45% | 2010 |
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| 30, St Nicholas Road661 m away | 85 m² | 110 m² | +25 m² +29% | 2026 |
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| 2, St Leonards Gardens89 m away | 117 m² | 142 m² | +25 m² +21% | 2024 |
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| 192, Old Shoreham Road996 m away | 78 m² | 103 m² | +25 m² +32% | 2024 |
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| 80, St Leonards Road97 m away | 63 m² | 88 m² | +25 m² +40% | 2020 |
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| 40, Hallyburton Road716 m away | 80 m² | 105 m² | +25 m² +31% | 2020 |
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| 63, Brambledean Road759 m away | 79 m² | 104 m² | +25 m² +32% | 2020 |
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| 9, St Leonards Road106 m away | 92 m² | 117 m² | +25 m² +27% | 2016 |
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| 17, Portland Avenue777 m away | 110 m² | 135 m² | +25 m² +23% | 2015 |
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| 15, Rothbury Road562 m away | 119 m² | 144 m² | +25 m² +21% | 2014 |
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| 5, St Leonards Gardens120 m away | 97 m² | 122 m² | +25 m² +26% | 2012 |
|---|
| 2a, St Aubyns Road281 m away | 83 m² | 107 m² | +24 m² +29% | 2024 |
|---|
| 32, Jesmond Road620 m away | 94 m² | 118 m² | +24 m² +26% | 2024 |
|---|
| 3, Saxon Road528 m away | 99 m² | 123 m² | +24 m² +24% | 2018 |
|---|
| 1, Portland Lane498 m away | 78 m² | 102 m² | +24 m² +31% | 2017 |
|---|
| 15, Saxon Road528 m away | 130 m² | 154 m² | +24 m² +18% | 2014 |
|---|
| Flat 1, 249, New Church Road210 m away | 36 m² | 59 m² | +23 m² +64% | 2026 |
|---|
| 3, Coleman Avenue920 m away | 139 m² | 162 m² | +23 m² +17% | 2026 |
|---|
| 33, Derek Avenue327 m away | 116 m² | 139 m² | +23 m² +20% | 2021 |
|---|
| 56, Mansfield Road654 m away | 124 m² | 147 m² | +23 m² +19% | 2021 |
|---|
| 4, St Leonards Gardens89 m away | 107 m² | 130 m² | +23 m² +21% | 2020 |
|---|
| 105, St Andrews Road494 m away | 100 m² | 123 m² | +23 m² +23% | 2016 |
|---|
| 11, Olive Road889 m away | 73 m² | 96 m² | +23 m² +32% | 2015 |
|---|
| 74, St Leonards Road97 m away | 66 m² | 88 m² | +22 m² +33% | 2023 |
|---|
| 1, Brittany Road400 m away | 124 m² | 146 m² | +22 m² +18% | 2023 |
|---|
| 27, Hallyburton Road751 m away | 66 m² | 88 m² | +22 m² +33% | 2022 |
|---|
| 39, Eastbrook Road715 m away | 72 m² | 94 m² | +22 m² +31% | 2020 |
|---|
| 26, St Richards Road817 m away | 79 m² | 101 m² | +22 m² +28% | 2020 |
|---|
| 5, Mornington Mansions, New Church Road510 m away | 55 m² | 77 m² | +22 m² +40% | 2018 |
|---|
| 34, Norway Street433 m away | 86 m² | 108 m² | +22 m² +26% | 2016 |
|---|
| 139, New Church Road771 m away | 142 m² | 164 m² | +22 m² +15% | 2013 |
|---|
| 14, St Aubyns Road281 m away | 127 m² | 148 m² | +21 m² +17% | 2023 |
|---|
| 108, North Street295 m away | 37 m² | 58 m² | +21 m² +57% | 2020 |
|---|
| 53, Worcester Villas330 m away | 130 m² | 151 m² | +21 m² +16% | 2020 |
|---|
| 19, Brittany Road400 m away | 82 m² | 102 m² | +20 m² +24% | 2024 |
|---|
| 57, Berriedale Avenue998 m away | 49 m² | 69 m² | +20 m² +41% | 2022 |
|---|
| 12, Norway Street433 m away | 87 m² | 107 m² | +20 m² +23% | 2021 |
|---|
| 98, Hallyburton Road586 m away | 130 m² | 150 m² | +20 m² +15% | 2020 |
|---|
| 6, Southdown Avenue747 m away | 79 m² | 99 m² | +20 m² +25% | 2020 |
|---|
| 22, Benfield Way936 m away | 129 m² | 149 m² | +20 m² +16% | 2020 |
|---|
| 246, New Church Road147 m away | 66 m² | 86 m² | +20 m² +30% | 2014 |
|---|
| 54, Portland Villas454 m away | 64 m² | 84 m² | +20 m² +31% | 2014 |
|---|
| 138, St Leonards Avenue37 m away | 47 m² | 67 m² | +20 m² +43% | 2013 |
|---|
| 54, Berriedale Avenue961 m away | 129 m² | 149 m² | +20 m² +16% | 2013 |
|---|
| 11, St Richards Road817 m away | 81 m² | 101 m² | +20 m² +25% | 2010 |
|---|
| 11, Vale Road493 m away | 84 m² | 103 m² | +19 m² +23% | 2025 |
|---|
| Flat 4, 56, Portland Villas454 m away | 46 m² | 65 m² | +19 m² +41% | 2022 |
|---|
| 37, Eastbrook Road715 m away | 70 m² | 89 m² | +19 m² +27% | 2021 |
|---|
| 4, Fishersgate Terrace893 m away | 41 m² | 60 m² | +19 m² +46% | 2017 |
|---|
| 4, Norway Street433 m away | 91 m² | 109 m² | +18 m² +20% | 2024 |
|---|
| Flat 2, 8, Portland Villas454 m away | 68 m² | 86 m² | +18 m² +26% | 2015 |
|---|
| 108, St Leonards Avenue37 m away | 44 m² | 62 m² | +18 m² +41% | 2012 |
|---|
| 25, Rothbury Road562 m away | 94 m² | 111 m² | +17 m² +18% | 2026 |
|---|
| 73, Church Road569 m away | 94 m² | 111 m² | +17 m² +18% | 2026 |
|---|
| 35, St Keyna Avenue198 m away | 94 m² | 111 m² | +17 m² +18% | 2023 |
|---|
| 15, Norway Street433 m away | 82 m² | 99 m² | +17 m² +21% | 2023 |
|---|
| 105, Vale Road588 m away | 106 m² | 123 m² | +17 m² +16% | 2023 |
|---|
| 42, Norway Street373 m away | 101 m² | 118 m² | +17 m² +17% | 2020 |
|---|