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 BN10 8PT
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 |
|---|---|---|---|---|
| 10, Chene Road733 m away | 147 m² | 349 m² | +202 m² +137% | 2019 |
| 16, Mayfield Avenue581 m away | 81 m² | 193 m² | +112 m² +138% | 2026 |
| 3, York Road217 m away | 84 m² | 180 m² | +96 m² +114% | 2026 |
| 1, Cresta Road974 m away | 141 m² | 219 m² | +78 m² +55% | 2026 |
| 72, The Promenade800 m away | 84 m² | 159 m² | +75 m² +89% | 2024 |
| 32a, Cissbury Avenue600 m away | 62 m² | 132 m² | +70 m² +113% | 2023 |
| 29, Capel Avenue836 m away | 77 m² | 145 m² | +68 m² +88% | 2014 |
| 12, Chene Road733 m away | 78 m² | 145 m² | +67 m² +86% | 2026 |
| 7, Seaview Road61 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.
| 159 m² |
| +65 m² +69% |
| 2026 |
| 63, South Coast Road164 m away | 155 m² | 220 m² | +65 m² +42% | 2021 |
|---|
| 40, Victoria Avenue980 m away | 80 m² | 145 m² | +65 m² +81% | 2017 |
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| 18, Vernon Avenue294 m away | 191 m² | 254 m² | +63 m² +33% | 2021 |
|---|
| 65, Arundel Road608 m away | 64 m² | 126 m² | +62 m² +97% | 2021 |
|---|
| 30a, South Coast Road197 m away | 105 m² | 166 m² | +61 m² +58% | 2024 |
|---|
| Nought, Capel Avenue836 m away | 106 m² | 166 m² | +60 m² +57% | 2023 |
|---|
| 12, The Promenade166 m away | 71 m² | 129 m² | +58 m² +82% | 2025 |
|---|
| 27a, Friars Avenue244 m away | 71 m² | 128 m² | +57 m² +80% | 2021 |
|---|
| 55, Keymer Avenue895 m away | 56 m² | 111 m² | +55 m² +98% | 2019 |
|---|
| 53, Slindon Avenue734 m away | 132 m² | 185 m² | +53 m² +40% | 2015 |
|---|
| 112, South Coast Road529 m away | 80 m² | 131 m² | +51 m² +64% | 2014 |
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| 114, South Coast Road529 m away | 85 m² | 136 m² | +51 m² +60% | 2013 |
|---|
| 35, Neville Road524 m away | 128 m² | 177 m² | +49 m² +38% | 2022 |
|---|
| 70, Capel Avenue953 m away | 95 m² | 141 m² | +46 m² +48% | 2025 |
|---|
| 10, Mayfield Avenue581 m away | 162 m² | 206 m² | +44 m² +27% | 2021 |
|---|
| 19, Victoria Avenue949 m away | 57 m² | 100 m² | +43 m² +75% | 2021 |
|---|
| 30, Arundel Road402 m away | 131 m² | 173 m² | +42 m² +32% | 2017 |
|---|
| 45, Victoria Avenue980 m away | 107 m² | 148 m² | +41 m² +38% | 2016 |
|---|
| 47, Cornwall Avenue254 m away | 75 m² | 113 m² | +38 m² +51% | 2019 |
|---|
| 24, Bolney Avenue911 m away | 87 m² | 123 m² | +36 m² +41% | 2024 |
|---|
| 10, Vernon Avenue294 m away | 99 m² | 133 m² | +34 m² +34% | 2022 |
|---|
| 9, Sunview Avenue368 m away | 157 m² | 191 m² | +34 m² +22% | 2014 |
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| 9, Wellington Road281 m away | 55 m² | 89 m² | +34 m² +62% | 2011 |
|---|
| 52, Piddinghoe Avenue562 m away | 80 m² | 112 m² | +32 m² +40% | 2013 |
|---|
| 19, Capel Avenue836 m away | 91 m² | 122 m² | +31 m² +34% | 2018 |
|---|
| 77, Capel Avenue953 m away | 67 m² | 97 m² | +30 m² +45% | 2021 |
|---|
| 42, Southdown Avenue352 m away | 104 m² | 132 m² | +28 m² +27% | 2017 |
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| 18, Neville Road524 m away | 117 m² | 144 m² | +27 m² +23% | 2026 |
|---|
| 80, Downland Avenue679 m away | 86 m² | 113 m² | +27 m² +31% | 2024 |
|---|
| 48, Piddinghoe Avenue562 m away | 69 m² | 96 m² | +27 m² +39% | 2022 |
|---|
| 37a, Seaview Avenue289 m away | 105 m² | 132 m² | +27 m² +26% | 2019 |
|---|
| 58, South Coast Road172 m away | 67 m² | 94 m² | +27 m² +40% | 2015 |
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| 5, Slindon Avenue658 m away | 66 m² | 93 m² | +27 m² +41% | 2013 |
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| 102, Arundel Road711 m away | 43 m² | 69 m² | +26 m² +60% | 2021 |
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| 9, Bayview Road177 m away | 63 m² | 89 m² | +26 m² +41% | 2014 |
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| 24, Victoria Avenue949 m away | 72 m² | 97 m² | +25 m² +35% | 2025 |
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| 33, Arundel Road402 m away | 77 m² | 102 m² | +25 m² +32% | 2023 |
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| 27, Neville Road524 m away | 89 m² | 114 m² | +25 m² +28% | 2021 |
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| 19, Gladys Avenue441 m away | 124 m² | 149 m² | +25 m² +20% | 2017 |
|---|
| 13, Southdown Avenue218 m away | 61 m² | 85 m² | +24 m² +39% | 2022 |
|---|
| 15, Southdown Avenue218 m away | 70 m² | 94 m² | +24 m² +34% | 2014 |
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| 18, Cornwall Avenue0 m away | 77 m² | 101 m² | +24 m² +31% | 2013 |
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| 6, Roundhouse Crescent765 m away | 50 m² | 73 m² | +23 m² +46% | 2025 |
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| 98, South Coast Road439 m away | 57 m² | 80 m² | +23 m² +40% | 2024 |
|---|
| 44, Keymer Avenue801 m away | 84 m² | 107 m² | +23 m² +27% | 2023 |
|---|
| 25, Mayfield Avenue581 m away | 41 m² | 64 m² | +23 m² +56% | 2018 |
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| 5, Friars Avenue73 m away | 58 m² | 81 m² | +23 m² +40% | 2014 |
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| 39, Mayfield Avenue636 m away | 95 m² | 117 m² | +22 m² +23% | 2016 |
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| 47, Sunview Avenue435 m away | 76 m² | 97 m² | +21 m² +28% | 2022 |
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| 10, Neville Road524 m away | 108 m² | 129 m² | +21 m² +19% | 2021 |
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| 52, Ashington Gardens368 m away | 97 m² | 118 m² | +21 m² +22% | 2015 |
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| 15, Cornwall Avenue0 m away | 61 m² | 81 m² | +20 m² +33% | 2017 |
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| 35, Piddinghoe Avenue562 m away | 81 m² | 101 m² | +20 m² +25% | 2013 |
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| 71, Ashington Gardens260 m away | 101 m² | 120 m² | +19 m² +19% | 2026 |
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| 19, Arundel Road402 m away | 87 m² | 106 m² | +19 m² +22% | 2013 |
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| 56, Sunview Avenue435 m away | 59 m² | 77 m² | +18 m² +31% | 2025 |
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| 54, Slindon Avenue734 m away | 69 m² | 87 m² | +18 m² +26% | 2024 |
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| Flat 3, 57, Mayfield Avenue636 m away | 41 m² | 59 m² | +18 m² +44% | 2016 |
|---|
| 18, Keymer Avenue763 m away | 66 m² | 84 m² | +18 m² +27% | 2012 |
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| 20, Neville Road524 m away | 94 m² | 111 m² | +17 m² +18% | 2022 |
|---|
| 67, Montreal Close565 m away | 110 m² | 127 m² | +17 m² +15% | 2022 |
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| 122, Arundel Road793 m away | 109 m² | 126 m² | +17 m² +16% | 2014 |
|---|
| 51, Friars Avenue244 m away | 88 m² | 104 m² | +16 m² +18% | 2026 |
|---|
| 31, Westview Close498 m away | 57 m² | 73 m² | +16 m² +28% | 2020 |
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| 110, Westview Close616 m away | 76 m² | 91 m² | +15 m² +20% | 2025 |
|---|
| 33, Mayfield Avenue636 m away | 77 m² | 92 m² | +15 m² +19% | 2024 |
|---|
| 21, Arundel Road402 m away | 82 m² | 97 m² | +15 m² +18% | 2018 |
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| 61, Ashington Gardens368 m away | 92 m² | 107 m² | +15 m² +16% | 2017 |
|---|
| 3, Vernon Avenue294 m away | 50 m² | 65 m² | +15 m² +30% | 2013 |
|---|
| Flat 1, 27, Piddinghoe Avenue544 m away | 26 m² | 41 m² | +15 m² +58% | 2009 |
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