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 BL1 8PD
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 |
|---|---|---|---|---|
| 62, Hill Cot Road649 m away | 124 m² | 240 m² | +116 m² +94% | 2015 |
| 106, Ashworth Lane673 m away | 90 m² | 191 m² | +101 m² +112% | 2016 |
| 36, Walnut Street638 m away | 84 m² | 175 m² | +91 m² +108% | 2022 |
| 20, Hill Cot Road649 m away | 100 m² | 183 m² | +83 m² +83% | 2018 |
| 7, Ivy Bank Close815 m away | 154 m² | 230 m² | +76 m² +49% | 2023 |
| 189, Belmont Road625 m away | 129 m² | 201 m² | +72 m² +56% | 2015 |
| 5, Ivy Bank Road669 m away | 62 m² | 133 m² | +71 m² +115% | 2019 |
| 14, Hargreaves Street997 m away | 64 m² | 129 m² | +65 m² +102% | 2016 |
| 43, Seymour Road203 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.
| 258 m² |
| 316 m² |
| +58 m² +22% |
| 2022 |
| 218, Belmont Road813 m away | 100 m² | 157 m² | +57 m² +57% | 2014 |
|---|
| Beechwood, Broad O' Th' Lane466 m away | 163 m² | 215 m² | +52 m² +32% | 2023 |
|---|
| 62, Wolfenden Street783 m away | 68 m² | 120 m² | +52 m² +76% | 2015 |
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| 4, Fewston Close898 m away | 138 m² | 189 m² | +51 m² +37% | 2014 |
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| 121, Holland Street197 m away | 67 m² | 115 m² | +48 m² +72% | 2016 |
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| 206, Blackburn Road795 m away | 152 m² | 200 m² | +48 m² +32% | 2015 |
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| 135, Belmont Road468 m away | 97 m² | 144 m² | +47 m² +48% | 2015 |
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| 276, Blackburn Road795 m away | 244 m² | 291 m² | +47 m² +19% | 2014 |
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| 433, Blackburn Road276 m away | 89 m² | 135 m² | +46 m² +52% | 2025 |
|---|
| Apartment 503, Holden Mill, Blackburn Road690 m away | 57 m² | 103 m² | +46 m² +81% | 2025 |
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| 18, Wynne Street995 m away | 54 m² | 100 m² | +46 m² +85% | 2015 |
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| 84, Broad O' Th' Lane427 m away | 168 m² | 213 m² | +45 m² +27% | 2013 |
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| 202, Blackburn Road795 m away | 183 m² | 227 m² | +44 m² +24% | 2017 |
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| 160, Ashworth Lane752 m away | 102 m² | 146 m² | +44 m² +43% | 2016 |
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| 352, Halliwell Road922 m away | 189 m² | 232 m² | +43 m² +23% | 2014 |
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| 330, Halliwell Road904 m away | 83 m² | 125 m² | +42 m² +51% | 2016 |
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| 652, Crompton Way330 m away | 72 m² | 114 m² | +42 m² +58% | 2011 |
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| 89, Ashworth Lane673 m away | 101 m² | 141 m² | +40 m² +40% | 2019 |
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| 4, Eastbank Street630 m away | 92 m² | 132 m² | +40 m² +43% | 2016 |
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| 220, Belmont Road813 m away | 93 m² | 133 m² | +40 m² +43% | 2015 |
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| 63, Pine Street739 m away | 64 m² | 104 m² | +40 m² +63% | 2014 |
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| 50, Wolfenden Street783 m away | 71 m² | 110 m² | +39 m² +55% | 2025 |
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| 57, Crumpsall Street646 m away | 61 m² | 100 m² | +39 m² +64% | 2014 |
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| 697, Blackburn Road471 m away | 160 m² | 197 m² | +37 m² +23% | 2026 |
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| 4, Birley Street50 m away | 53 m² | 90 m² | +37 m² +70% | 2015 |
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| 1, Perendale Rise382 m away | 145 m² | 182 m² | +37 m² +26% | 2014 |
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| 35, Walnut Street638 m away | 139 m² | 176 m² | +37 m² +27% | 2014 |
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| 404, Halliwell Road990 m away | 99 m² | 136 m² | +37 m² +37% | 2013 |
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| 12, Orchard Avenue311 m away | 97 m² | 133 m² | +36 m² +37% | 2015 |
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| 79, Grasmere Street620 m away | 213 m² | 249 m² | +36 m² +17% | 2015 |
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| 35, Westminster Road502 m away | 85 m² | 120 m² | +35 m² +41% | 2024 |
|---|
| 45, Parkgate Drive700 m away | 57 m² | 92 m² | +35 m² +61% | 2018 |
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| 9, Halbury Walk692 m away | 134 m² | 169 m² | +35 m² +26% | 2016 |
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| 15, Rainshaw Street386 m away | 78 m² | 112 m² | +34 m² +44% | 2025 |
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| 20, Mackenzie Street568 m away | 82 m² | 115 m² | +33 m² +40% | 2023 |
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| 15, Eastbank Street630 m away | 85 m² | 118 m² | +33 m² +39% | 2016 |
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| 15, Cameron Street546 m away | 57 m² | 90 m² | +33 m² +58% | 2015 |
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| 13, Cameron Street546 m away | 57 m² | 90 m² | +33 m² +58% | 2015 |
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| 52, Cameron Street693 m away | 30 m² | 63 m² | +33 m² +110% | 2010 |
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| 1, Thorns Road406 m away | 85 m² | 117 m² | +32 m² +38% | 2023 |
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| 62, Hawarden Street536 m away | 41 m² | 73 m² | +32 m² +78% | 2022 |
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| 16, Westminster Road502 m away | 58 m² | 90 m² | +32 m² +55% | 2013 |
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| 282, Halliwell Road904 m away | 36 m² | 67 m² | +31 m² +86% | 2025 |
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| 16, Linwood House, Seymour Road227 m away | 54 m² | 84 m² | +30 m² +56% | 2024 |
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| 7, Florence Avenue491 m away | 80 m² | 110 m² | +30 m² +38% | 2023 |
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| 38, Ivy Bank Road669 m away | 168 m² | 198 m² | +30 m² +18% | 2021 |
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| 660, Blackburn Road429 m away | 94 m² | 124 m² | +30 m² +32% | 2016 |
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| 70, Ashworth Lane555 m away | 102 m² | 132 m² | +30 m² +29% | 2016 |
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| 19, Sunnymead Avenue417 m away | 92 m² | 121 m² | +29 m² +32% | 2023 |
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| 3, Almond Street211 m away | 65 m² | 94 m² | +29 m² +45% | 2022 |
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| 20, Thorn Street811 m away | 70 m² | 99 m² | +29 m² +41% | 2014 |
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| 35, Cameron Street693 m away | 66 m² | 95 m² | +29 m² +44% | 2013 |
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| 234, Ashworth Lane934 m away | 88 m² | 116 m² | +28 m² +32% | 2024 |
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| 253, Ashworth Lane934 m away | 178 m² | 206 m² | +28 m² +16% | 2022 |
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| 11, Regan Street821 m away | 69 m² | 97 m² | +28 m² +41% | 2019 |
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| 95, Ashworth Lane752 m away | 77 m² | 105 m² | +28 m² +36% | 2016 |
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| 10, Stonyhurst Avenue846 m away | 109 m² | 137 m² | +28 m² +26% | 2015 |
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| Apartment 250, Holden Mill, Blackburn Road690 m away | 63 m² | 90 m² | +27 m² +43% | 2025 |
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| 105, Moss Bank Way538 m away | 152 m² | 179 m² | +27 m² +18% | 2016 |
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| 10, Fir Street787 m away | 86 m² | 113 m² | +27 m² +31% | 2013 |
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| 283, Halliwell Road944 m away | 84 m² | 111 m² | +27 m² +32% | 2013 |
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| 94, Belmont Road476 m away | 104 m² | 130 m² | +26 m² +25% | 2025 |
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| Apartment 249, Holden Mill, Blackburn Road690 m away | 63 m² | 89 m² | +26 m² +41% | 2018 |
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| 178, Halliwell Road992 m away | 80 m² | 106 m² | +26 m² +33% | 2016 |
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| 43, Oakworth Drive984 m away | 115 m² | 140 m² | +25 m² +22% | 2024 |
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| 5, Oakworth Drive984 m away | 126 m² | 151 m² | +25 m² +20% | 2023 |
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| 18, Sweetstone Gardens907 m away | 66 m² | 91 m² | +25 m² +38% | 2019 |
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| 20, Chelford Avenue806 m away | 95 m² | 120 m² | +25 m² +26% | 2015 |
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| 100, Grasmere Street620 m away | 73 m² | 98 m² | +25 m² +34% | 2014 |
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| 20, Waverley Road331 m away | 102 m² | 126 m² | +24 m² +24% | 2020 |
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| 18, Moss Bank Close436 m away | 81 m² | 105 m² | +24 m² +30% | 2016 |
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| 6, Hill Top973 m away | 51 m² | 75 m² | +24 m² +47% | 2016 |
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| 199, Belmont Road625 m away | 132 m² | 156 m² | +24 m² +18% | 2015 |
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| 43, Crumpsall Street646 m away | 61 m² | 85 m² | +24 m² +39% | 2013 |
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| 15, Primula Street461 m away | 79 m² | 103 m² | +24 m² +30% | 2011 |
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| 5, Embsay Close978 m away | 82 m² | 105 m² | +23 m² +28% | 2026 |
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| Apartment 26, Holden Mill, Blackburn Road690 m away | 91 m² | 114 m² | +23 m² +25% | 2023 |
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| 80, Seymour Road281 m away | 132 m² | 155 m² | +23 m² +17% | 2013 |
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| 402, Halliwell Road990 m away | 98 m² | 120 m² | +22 m² +22% | 2026 |
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| Apartment 410, Holden Mill, Blackburn Road690 m away | 59 m² | 81 m² | +22 m² +37% | 2022 |
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| 8, Neston Avenue699 m away | 84 m² | 106 m² | +22 m² +26% | 2022 |
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| 5, Greenleigh Close923 m away | 103 m² | 125 m² | +22 m² +21% | 2021 |
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| 50, Seymour Road281 m away | 132 m² | 154 m² | +22 m² +17% | 2019 |
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| 123, Seymour Road436 m away | 114 m² | 136 m² | +22 m² +19% | 2016 |
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| 14, Rushford Grove301 m away | 102 m² | 124 m² | +22 m² +22% | 2015 |
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| 10, Elsworth Drive338 m away | 83 m² | 105 m² | +22 m² +27% | 2014 |
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| 104, Belmont Road476 m away | 105 m² | 126 m² | +21 m² +20% | 2018 |
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| 9, Anson Street550 m away | 55 m² | 76 m² | +21 m² +38% | 2016 |
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| 22, Hill Cot Road649 m away | 84 m² | 105 m² | +21 m² +25% | 2016 |
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| 18, Fir Street787 m away | 85 m² | 106 m² | +21 m² +25% | 2014 |
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| 28, Hallbridge Gardens877 m away | 80 m² | 101 m² | +21 m² +26% | 2014 |
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| 649, Crompton Way315 m away | 100 m² | 121 m² | +21 m² +21% | 2013 |
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| 32, Florence Avenue506 m away | 69 m² | 89 m² | +20 m² +29% | 2025 |
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| Apartment 245, Holden Mill, Blackburn Road690 m away | 61 m² | 81 m² | +20 m² +33% | 2024 |
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| 462, Halliwell Road990 m away | 83 m² | 103 m² | +20 m² +24% | 2021 |
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| 138, Ashworth Lane752 m away | 71 m² | 91 m² | +20 m² +28% | 2016 |
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| 61, Parkgate Drive700 m away | 32 m² | 52 m² | +20 m² +63% | 2015 |
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| 355, Blackburn Road552 m away | 125 m² | 145 m² | +20 m² +16% | 2013 |
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| 7, Thorn Street811 m away | 65 m² | 85 m² | +20 m² +31% | 2013 |
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| 4, Hugh Lupus Street920 m away | 75 m² | 95 m² | +20 m² +27% | 2012 |
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| 648, Blackburn Road241 m away | 97 m² | 117 m² | +20 m² +21% | 2011 |
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| 40, Waverley Road331 m away | 123 m² | 143 m² | +20 m² +16% | 2011 |
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| 3, Marple Avenue673 m away | 39 m² | 58 m² | +19 m² +49% | 2020 |
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| 1, Old Road185 m away | 123 m² | 142 m² | +19 m² +15% | 2017 |
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| 73, Crumpsall Street646 m away | 66 m² | 85 m² | +19 m² +29% | 2014 |
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| 1, Elsham Close811 m away | 95 m² | 114 m² | +19 m² +20% | 2014 |
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| 7, Hurstwood857 m away | 93 m² | 112 m² | +19 m² +20% | 2014 |
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| 9, Hurstwood857 m away | 101 m² | 120 m² | +19 m² +19% | 2014 |
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| 47, Hallbridge Gardens877 m away | 122 m² | 141 m² | +19 m² +16% | 2014 |
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| 36, Florence Avenue506 m away | 68 m² | 87 m² | +19 m² +28% | 2011 |
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| Apartment 120, Holden Mill, Blackburn Road690 m away | 47 m² | 65 m² | +18 m² +38% | 2024 |
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| Apartment 639, Holden Mill, Blackburn Road690 m away | 93 m² | 111 m² | +18 m² +19% | 2024 |
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| Apartment 519, Holden Mill, Blackburn Road690 m away | 63 m² | 81 m² | +18 m² +29% | 2023 |
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| 26, Bar Lane561 m away | 89 m² | 107 m² | +18 m² +20% | 2020 |
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| 58, Ashworth Lane555 m away | 81 m² | 99 m² | +18 m² +22% | 2017 |
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| 12, Douglas Street596 m away | 58 m² | 76 m² | +18 m² +31% | 2012 |
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| 62, Rawsthorne Street788 m away | 53 m² | 70 m² | +17 m² +32% | 2024 |
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| 12, Hawarden Street443 m away | 76 m² | 93 m² | +17 m² +22% | 2023 |
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| 16, Sutcliffe Street653 m away | 103 m² | 120 m² | +17 m² +17% | 2015 |
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| 64, Astley Street700 m away | 98 m² | 115 m² | +17 m² +17% | 2015 |
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| 69, Old Road239 m away | 67 m² | 84 m² | +17 m² +25% | 2014 |
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| 9, Eastbank Street630 m away | 56 m² | 73 m² | +17 m² +30% | 2014 |
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| 41, Oakworth Drive984 m away | 92 m² | 109 m² | +17 m² +18% | 2014 |
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| 92, Belmont Road476 m away | 111 m² | 128 m² | +17 m² +15% | 2013 |
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| 102, Ashworth Lane673 m away | 99 m² | 116 m² | +17 m² +17% | 2013 |
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| 35, Windermere Street637 m away | 91 m² | 107 m² | +16 m² +18% | 2026 |
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| 53, Waterside Gardens786 m away | 61 m² | 77 m² | +16 m² +26% | 2023 |
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| 15, Thornydyke Avenue666 m away | 72 m² | 88 m² | +16 m² +22% | 2022 |
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| 40, Waterside Gardens786 m away | 74 m² | 90 m² | +16 m² +22% | 2019 |
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| 40, Eastbank Street630 m away | 80 m² | 96 m² | +16 m² +20% | 2016 |
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| 668, Crompton Way330 m away | 86 m² | 102 m² | +16 m² +19% | 2014 |
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| Apartment 522, Holden Mill, Blackburn Road690 m away | 71 m² | 86 m² | +15 m² +21% | 2026 |
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| 12, Bar Lane561 m away | 90 m² | 105 m² | +15 m² +17% | 2025 |
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| 34, Oldhams Terrace850 m away | 58 m² | 73 m² | +15 m² +26% | 2025 |
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| 25, Fairhaven Road683 m away | 65 m² | 80 m² | +15 m² +23% | 2020 |
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| 69, Waterside Gardens786 m away | 47 m² | 62 m² | +15 m² +32% | 2019 |
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| 170, Blackburn Road995 m away | 42 m² | 57 m² | +15 m² +36% | 2017 |
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| 11, Old Road185 m away | 96 m² | 111 m² | +15 m² +16% | 2016 |
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| 27, Primula Street461 m away | 73 m² | 88 m² | +15 m² +21% | 2016 |
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| 684, Crompton Way330 m away | 80 m² | 95 m² | +15 m² +19% | 2014 |
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| 13, Thorns Road406 m away | 97 m² | 112 m² | +15 m² +15% | 2014 |
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| 9, Douglas Street596 m away | 85 m² | 100 m² | +15 m² +18% | 2014 |
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