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 N12 0BT
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 |
|---|---|---|---|---|
| 48, Woodside Park Road692 m away | 213 m² | 373 m² | +160 m² +75% | 2021 |
| 612, High Road254 m away | 145 m² | 302 m² | +157 m² +108% | 2025 |
| 77, Westbury Road945 m away | 131 m² | 287 m² | +156 m² +119% | 2013 |
| 104, Nether Street726 m away | 201 m² | 336 m² | +135 m² +67% | 2019 |
| 36, Kenver Avenue471 m away | 104 m² | 239 m² | +135 m² +130% | 2012 |
| 6, Ravensdale Avenue668 m away | 203 m² | 334 m² | +131 m² +65% | 2026 |
| 17, Westbury Road917 m away | 196 m² | 320 m² | +124 m² +63% | 2018 |
| 87, Wentworth Avenue963 m away | 90 m² | 210 m² | +120 m² +133% | 2020 |
| 11, Torrington Park512 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.
| 167 m² |
| 276 m² |
| +109 m² +65% |
| 2015 |
| 608, High Road254 m away | 265 m² | 370 m² | +105 m² +40% | 2023 |
|---|
| 37, Friern Watch Avenue851 m away | 176 m² | 276 m² | +100 m² +57% | 2025 |
|---|
| 89, Wentworth Avenue963 m away | 111 m² | 210 m² | +99 m² +89% | 2020 |
|---|
| 36, Gainsborough Road627 m away | 113 m² | 208 m² | +95 m² +84% | 2022 |
|---|
| 38, Essex Park790 m away | 111 m² | 204 m² | +93 m² +84% | 2014 |
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| 72, Ingleway637 m away | 97 m² | 185 m² | +88 m² +91% | 2026 |
|---|
| 4, Eton Avenue437 m away | 112 m² | 200 m² | +88 m² +79% | 2019 |
|---|
| 29a, Westbury Road917 m away | 111 m² | 197 m² | +86 m² +77% | 2018 |
|---|
| 35, Alexandra Grove525 m away | 176 m² | 262 m² | +86 m² +49% | 2015 |
|---|
| 57, Courthouse Road856 m away | 98 m² | 182 m² | +84 m² +86% | 2016 |
|---|
| 65, Crescent Way691 m away | 82 m² | 165 m² | +83 m² +101% | 2021 |
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| 8, Rosemont Avenue84 m away | 128 m² | 209 m² | +81 m² +63% | 2024 |
|---|
| 46, Friary Road965 m away | 134 m² | 214 m² | +80 m² +60% | 2026 |
|---|
| 56, Woodside Park Road692 m away | 201 m² | 281 m² | +80 m² +40% | 2023 |
|---|
| 74, Friern Watch Avenue810 m away | 139 m² | 217 m² | +78 m² +56% | 2025 |
|---|
| 68, Queens Avenue983 m away | 116 m² | 192 m² | +76 m² +66% | 2024 |
|---|
| 43, Etchingham Park Road888 m away | 205 m² | 281 m² | +76 m² +37% | 2022 |
|---|
| 34, Courthouse Road829 m away | 91 m² | 165 m² | +74 m² +81% | 2023 |
|---|
| 45, Bramber Road721 m away | 104 m² | 178 m² | +74 m² +71% | 2021 |
|---|
| 68, Friern Watch Avenue810 m away | 75 m² | 147 m² | +72 m² +96% | 2016 |
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| 51, Bow Lane787 m away | 131 m² | 202 m² | +71 m² +54% | 2020 |
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| 18, Valley Avenue898 m away | 104 m² | 175 m² | +71 m² +68% | 2019 |
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| 50, Torrington Park646 m away | 85 m² | 155 m² | +70 m² +82% | 2024 |
|---|
| 5, Mossborough Close562 m away | 96 m² | 166 m² | +70 m² +73% | 2022 |
|---|
| 45, Holdenhurst Avenue715 m away | 104 m² | 173 m² | +69 m² +66% | 2022 |
|---|
| 11, Friary Way988 m away | 124 m² | 193 m² | +69 m² +56% | 2016 |
|---|
| 46, Moss Hall Grove615 m away | 124 m² | 192 m² | +68 m² +55% | 2021 |
|---|
| 46, Hilton Avenue548 m away | 50 m² | 117 m² | +67 m² +134% | 2025 |
|---|
| 10, Friary Road809 m away | 101 m² | 167 m² | +66 m² +65% | 2026 |
|---|
| 24, Courthouse Road829 m away | 102 m² | 168 m² | +66 m² +65% | 2024 |
|---|
| 38, Nethercourt Avenue991 m away | 102 m² | 168 m² | +66 m² +65% | 2024 |
|---|
| 37, Petworth Road907 m away | 45 m² | 110 m² | +65 m² +144% | 2022 |
|---|
| 23, Gainsborough Road572 m away | 132 m² | 197 m² | +65 m² +49% | 2021 |
|---|
| 28, Courthouse Road829 m away | 92 m² | 156 m² | +64 m² +70% | 2025 |
|---|
| 38, Hilton Avenue548 m away | 91 m² | 155 m² | +64 m² +70% | 2017 |
|---|
| 40, Friern Park415 m away | 165 m² | 228 m² | +63 m² +38% | 2023 |
|---|
| 15, Woodside Avenue816 m away | 162 m² | 223 m² | +61 m² +38% | 2021 |
|---|
| 67, Westbury Road945 m away | 117 m² | 177 m² | +60 m² +51% | 2023 |
|---|
| 18, Lewes Road848 m away | 105 m² | 163 m² | +58 m² +55% | 2023 |
|---|
| 11, Castle Road282 m away | 81 m² | 139 m² | +58 m² +72% | 2020 |
|---|
| 64, Grove Road302 m away | 98 m² | 156 m² | +58 m² +59% | 2020 |
|---|
| 12, Upway768 m away | 78 m² | 133 m² | +55 m² +71% | 2024 |
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| 9, Woodside Park Road594 m away | 51 m² | 106 m² | +55 m² +108% | 2017 |
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| 4, Petworth Road940 m away | 121 m² | 174 m² | +53 m² +44% | 2026 |
|---|
| 785a, High Road423 m away | 74 m² | 127 m² | +53 m² +72% | 2023 |
|---|
| 41, Eton Avenue476 m away | 131 m² | 184 m² | +53 m² +40% | 2019 |
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| 2, The Garth897 m away | 124 m² | 177 m² | +53 m² +43% | 2014 |
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| 41, Grove Road265 m away | 104 m² | 156 m² | +52 m² +50% | 2023 |
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| 66, Woodside Park Road761 m away | 75 m² | 127 m² | +52 m² +69% | 2023 |
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| 179, Summers Lane904 m away | 82 m² | 132 m² | +50 m² +61% | 2026 |
|---|
| 18, Courthouse Gardens922 m away | 128 m² | 178 m² | +50 m² +39% | 2023 |
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| 31, Avondale Avenue642 m away | 154 m² | 204 m² | +50 m² +32% | 2022 |
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| 682, High Road91 m away | 70 m² | 120 m² | +50 m² +71% | 2020 |
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| 66, Petworth Road940 m away | 89 m² | 139 m² | +50 m² +56% | 2018 |
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| 47, Fallow Court Avenue398 m away | 122 m² | 171 m² | +49 m² +40% | 2023 |
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| 86, Avondale Avenue735 m away | 120 m² | 169 m² | +49 m² +41% | 2015 |
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| 88, Queens Avenue983 m away | 113 m² | 161 m² | +48 m² +42% | 2026 |
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| 54, Grove Road302 m away | 107 m² | 155 m² | +48 m² +45% | 2023 |
|---|
| 22, Rosemont Avenue84 m away | 109 m² | 157 m² | +48 m² +44% | 2018 |
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| 3, Church Path529 m away | 87 m² | 134 m² | +47 m² +54% | 2018 |
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| 129, Ashurst Road970 m away | 96 m² | 142 m² | +46 m² +48% | 2026 |
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| 7, Summers Row997 m away | 75 m² | 121 m² | +46 m² +61% | 2026 |
|---|
| 22, Courthouse Gardens922 m away | 181 m² | 227 m² | +46 m² +25% | 2024 |
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| 37, Lewes Road813 m away | 105 m² | 151 m² | +46 m² +44% | 2012 |
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| 18, Hilton Avenue548 m away | 126 m² | 171 m² | +45 m² +36% | 2022 |
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| 69, Ashurst Road998 m away | 112 m² | 157 m² | +45 m² +40% | 2021 |
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| 45, Alexandra Grove525 m away | 121 m² | 166 m² | +45 m² +37% | 2020 |
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| 118, Summers Lane812 m away | 84 m² | 128 m² | +44 m² +52% | 2025 |
|---|
| 42, Addington Drive342 m away | 109 m² | 153 m² | +44 m² +40% | 2024 |
|---|
| 90, Woodgrange Avenue473 m away | 142 m² | 186 m² | +44 m² +31% | 2024 |
|---|
| Flat 18, 706, High Road160 m away | 53 m² | 97 m² | +44 m² +83% | 2021 |
|---|
| 14, Chislehurst Avenue694 m away | 125 m² | 169 m² | +44 m² +35% | 2020 |
|---|
| 57, Bramber Road721 m away | 123 m² | 166 m² | +43 m² +35% | 2022 |
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| Flat 7, 5, Holden Avenue801 m away | 62 m² | 105 m² | +43 m² +69% | 2020 |
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| 114, Granville Road534 m away | 63 m² | 106 m² | +43 m² +68% | 2017 |
|---|
| 8, Brookdene, Holden Road992 m away | 71 m² | 114 m² | +43 m² +61% | 2012 |
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| 47, Wentworth Avenue963 m away | 107 m² | 149 m² | +42 m² +39% | 2025 |
|---|
| 3, Percy Road386 m away | 51 m² | 93 m² | +42 m² +82% | 2024 |
|---|
| 25, Valley Avenue898 m away | 114 m² | 156 m² | +42 m² +37% | 2021 |
|---|
| 1, Percy Road386 m away | 50 m² | 92 m² | +42 m² +84% | 2019 |
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| 3, Friern Watch Avenue816 m away | 161 m² | 203 m² | +42 m² +26% | 2012 |
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| 4, Ravensdale Avenue668 m away | 164 m² | 205 m² | +41 m² +25% | 2026 |
|---|
| 39, Nether Street280 m away | 119 m² | 160 m² | +41 m² +34% | 2020 |
|---|
| 22, Eton Avenue437 m away | 130 m² | 171 m² | +41 m² +32% | 2020 |
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| 28, Friern Park415 m away | 54 m² | 95 m² | +41 m² +76% | 2016 |
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| 14, Highwood Avenue922 m away | 109 m² | 149 m² | +40 m² +37% | 2025 |
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| 23, Avondale Avenue642 m away | 161 m² | 201 m² | +40 m² +25% | 2020 |
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| 81, Ashurst Road998 m away | 98 m² | 138 m² | +40 m² +41% | 2018 |
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| 29, Essex Park816 m away | 109 m² | 149 m² | +40 m² +37% | 2017 |
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| 7, Stanhope Road306 m away | 88 m² | 127 m² | +39 m² +44% | 2025 |
|---|
| 3, Garthway743 m away | 87 m² | 126 m² | +39 m² +45% | 2023 |
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| 6, Cardrew Avenue612 m away | 108 m² | 147 m² | +39 m² +36% | 2022 |
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| 62, Churchfield Avenue205 m away | 140 m² | 179 m² | +39 m² +28% | 2017 |
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| 75, Mayfield Avenue941 m away | 99 m² | 138 m² | +39 m² +39% | 2014 |
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| 39, Hillcourt Avenue564 m away | 191 m² | 230 m² | +39 m² +20% | 2011 |
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| 54, Percy Road454 m away | 79 m² | 117 m² | +38 m² +48% | 2026 |
|---|
| 14, Sandringham Gardens287 m away | 158 m² | 196 m² | +38 m² +24% | 2022 |
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| 9a, Chislehurst Avenue694 m away | 80 m² | 118 m² | +38 m² +48% | 2020 |
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| Flat 12, Holmdene, Holden Road811 m away | 72 m² | 110 m² | +38 m² +53% | 2018 |
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| 96, Summers Lane812 m away | 73 m² | 111 m² | +38 m² +52% | 2013 |
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| 9, Hillcourt Avenue564 m away | 73 m² | 111 m² | +38 m² +52% | 2012 |
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| 31, Bramber Road721 m away | 101 m² | 139 m² | +38 m² +38% | 2012 |
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| 32, Grange Avenue448 m away | 49 m² | 86 m² | +37 m² +76% | 2025 |
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| 16, Hillcourt Avenue571 m away | 101 m² | 138 m² | +37 m² +37% | 2023 |
|---|
| 1, Holdenhurst Avenue715 m away | 111 m² | 148 m² | +37 m² +33% | 2018 |
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| 57, Bow Lane787 m away | 121 m² | 158 m² | +37 m² +31% | 2016 |
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| 54, Stanhope Road351 m away | 86 m² | 122 m² | +36 m² +42% | 2025 |
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| 8, Derby Avenue283 m away | 98 m² | 134 m² | +36 m² +37% | 2022 |
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| 11, Theobalds Avenue821 m away | 96 m² | 132 m² | +36 m² +38% | 2021 |
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| 35, Hillcourt Avenue564 m away | 149 m² | 184 m² | +35 m² +23% | 2026 |
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| 8, Holdenhurst Avenue694 m away | 94 m² | 129 m² | +35 m² +37% | 2025 |
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| 46, Queens Avenue983 m away | 54 m² | 89 m² | +35 m² +65% | 2025 |
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| 16a, Gruneisen Road938 m away | 57 m² | 92 m² | +35 m² +61% | 2023 |
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| 27, Hillcourt Avenue564 m away | 114 m² | 149 m² | +35 m² +31% | 2020 |
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| 27a, Holden Road748 m away | 53 m² | 88 m² | +35 m² +66% | 2015 |
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| 87, Sandringham Gardens497 m away | 111 m² | 145 m² | +34 m² +31% | 2026 |
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| 4, Fredericks Place805 m away | 75 m² | 109 m² | +34 m² +45% | 2024 |
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| Flat 7, Robart House, Lodge Lane574 m away | 30 m² | 64 m² | +34 m² +113% | 2023 |
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| 21a, Grove Road265 m away | 54 m² | 88 m² | +34 m² +63% | 2020 |
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| 26, Nethercourt Avenue991 m away | 105 m² | 139 m² | +34 m² +32% | 2019 |
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| Flat 33, Etchingham Court, Etchingham Park Road694 m away | 41 m² | 75 m² | +34 m² +83% | 2018 |
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| 13, Westbury Road917 m away | 206 m² | 240 m² | +34 m² +17% | 2014 |
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| Flat 24, Kings Lodge, Kingsway87 m away | 44 m² | 77 m² | +33 m² +75% | 2026 |
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| 42, Woodhouse Road319 m away | 92 m² | 125 m² | +33 m² +36% | 2023 |
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| 39, Stanhope Road306 m away | 52 m² | 85 m² | +33 m² +63% | 2019 |
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| 77, Friern Park574 m away | 84 m² | 117 m² | +33 m² +39% | 2019 |
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| 26, Queens Avenue983 m away | 111 m² | 144 m² | +33 m² +30% | 2019 |
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| 55, Sandringham Gardens279 m away | 48 m² | 81 m² | +33 m² +69% | 2013 |
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| 36, Avondale Avenue735 m away | 159 m² | 191 m² | +32 m² +20% | 2017 |
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| 85, Woodgrange Avenue511 m away | 126 m² | 157 m² | +31 m² +25% | 2025 |
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| 18a, Brownlow Road902 m away | 55 m² | 86 m² | +31 m² +56% | 2023 |
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| 84, Queens Avenue983 m away | 111 m² | 142 m² | +31 m² +28% | 2023 |
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| Flat 17, Michelle Court, Torrington Park502 m away | 56 m² | 87 m² | +31 m² +55% | 2021 |
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| 67, Grove Road380 m away | 95 m² | 126 m² | +31 m² +33% | 2020 |
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| Flat 1, 33, Woodside Park Road594 m away | 75 m² | 106 m² | +31 m² +41% | 2020 |
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| 51, Ashurst Road998 m away | 115 m² | 145 m² | +30 m² +26% | 2024 |
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| 65, Grange Avenue462 m away | 74 m² | 104 m² | +30 m² +41% | 2023 |
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| 32, Avenue Road721 m away | 95 m² | 125 m² | +30 m² +32% | 2021 |
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| 16, Westbury Grove954 m away | 103 m² | 133 m² | +30 m² +29% | 2014 |
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| 15, Friern Park447 m away | 180 m² | 210 m² | +30 m² +17% | 2013 |
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| 30, Fallow Court Avenue370 m away | 134 m² | 163 m² | +29 m² +22% | 2025 |
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| 49, Grange Avenue448 m away | 66 m² | 95 m² | +29 m² +44% | 2023 |
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| 60, Lodge Lane551 m away | 56 m² | 85 m² | +29 m² +52% | 2022 |
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| 78a, Westbury Road906 m away | 76 m² | 105 m² | +29 m² +38% | 2020 |
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| 36a, Queens Avenue983 m away | 52 m² | 81 m² | +29 m² +56% | 2020 |
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| 42, Friary Road965 m away | 124 m² | 152 m² | +28 m² +23% | 2026 |
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| 36, Eton Avenue437 m away | 157 m² | 185 m² | +28 m² +18% | 2024 |
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| 6, Crescent Way739 m away | 86 m² | 114 m² | +28 m² +33% | 2022 |
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| 55, Grange Avenue448 m away | 41 m² | 68 m² | +27 m² +66% | 2023 |
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| 51, Sandringham Gardens279 m away | 104 m² | 131 m² | +27 m² +26% | 2020 |
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| 22, Hamilton Square195 m away | 65 m² | 92 m² | +27 m² +42% | 2018 |
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| 108, Grove Road388 m away | 82 m² | 109 m² | +27 m² +33% | 2018 |
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| 1, Cliveden Close797 m away | 55 m² | 82 m² | +27 m² +49% | 2018 |
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| Flat 1, 728, High Road216 m away | 23 m² | 50 m² | +27 m² +117% | 2012 |
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| 3, Thyra Grove466 m away | 97 m² | 124 m² | +27 m² +28% | 2012 |
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| 16, Summers Row997 m away | 80 m² | 106 m² | +26 m² +33% | 2026 |
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| 18, Gainsborough Road583 m away | 65 m² | 91 m² | +26 m² +40% | 2024 |
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| 81, Avenue Road721 m away | 64 m² | 90 m² | +26 m² +41% | 2024 |
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| 31, Sandringham Gardens279 m away | 139 m² | 165 m² | +26 m² +19% | 2023 |
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| 40, Moss Hall Grove615 m away | 139 m² | 165 m² | +26 m² +19% | 2023 |
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| Cintra, Holden Road847 m away | 102 m² | 128 m² | +26 m² +25% | 2023 |
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| 150, Summers Lane875 m away | 62 m² | 88 m² | +26 m² +42% | 2022 |
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| 52, Queens Avenue983 m away | 122 m² | 148 m² | +26 m² +21% | 2015 |
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| 8, Copwood Close832 m away | 26 m² | 52 m² | +26 m² +100% | 2011 |
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| 30, Nether Street237 m away | 24 m² | 49 m² | +25 m² +104% | 2022 |
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| 13, Stanhope Road306 m away | 35 m² | 60 m² | +25 m² +71% | 2022 |
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| Flat 1, Elle Court, 96, Nether Street691 m away | 66 m² | 91 m² | +25 m² +38% | 2022 |
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| 16, Crossway568 m away | 29 m² | 54 m² | +25 m² +86% | 2021 |
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| Flat 2, 3, Alexandra Grove365 m away | 34 m² | 59 m² | +25 m² +74% | 2020 |
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| 80, Woodhouse Road449 m away | 73 m² | 98 m² | +25 m² +34% | 2020 |
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| Flat B, 76, Granville Road608 m away | 38 m² | 63 m² | +25 m² +66% | 2020 |
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| 17, Derby Avenue283 m away | 93 m² | 118 m² | +25 m² +27% | 2018 |
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| 12, Grove Road302 m away | 125 m² | 150 m² | +25 m² +20% | 2017 |
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| 101, Nether Street437 m away | 58 m² | 83 m² | +25 m² +43% | 2010 |
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| 120, Mayfield Avenue900 m away | 125 m² | 149 m² | +24 m² +19% | 2026 |
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| 20, Woodberry Grove306 m away | 128 m² | 152 m² | +24 m² +19% | 2025 |
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| 64, Woodgrange Avenue473 m away | 94 m² | 118 m² | +24 m² +26% | 2025 |
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| 40, Grove Road302 m away | 125 m² | 149 m² | +24 m² +19% | 2024 |
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| 108, Woodhouse Road449 m away | 72 m² | 96 m² | +24 m² +33% | 2024 |
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| 9, Summers Row997 m away | 86 m² | 110 m² | +24 m² +28% | 2024 |
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| 770a, High Road387 m away | 41 m² | 65 m² | +24 m² +59% | 2023 |
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| 10, Woodberry Way413 m away | 53 m² | 77 m² | +24 m² +45% | 2023 |
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| 49a, Stanhope Road306 m away | 42 m² | 66 m² | +24 m² +57% | 2022 |
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| Flat 1507, 100, Kingsway90 m away | 87 m² | 111 m² | +24 m² +28% | 2021 |
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| 1, The Woodlands, High Road286 m away | 73 m² | 97 m² | +24 m² +33% | 2021 |
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| 66, Torrington Park846 m away | 56 m² | 80 m² | +24 m² +43% | 2021 |
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| 70, Woodside Park Road761 m away | 75 m² | 99 m² | +24 m² +32% | 2019 |
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| 31, Woodhouse Road98 m away | 38 m² | 62 m² | +24 m² +63% | 2010 |
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| Flat 3, The Fountains, Ballards Lane781 m away | 71 m² | 95 m² | +24 m² +34% | 2010 |
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| Flat 3, 656a, High Road61 m away | 44 m² | 67 m² | +23 m² +52% | 2026 |
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| 7, Finchley Park981 m away | 125 m² | 148 m² | +23 m² +18% | 2026 |
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