Side extensions in Lambeth
4,523 applications since 2019. 3,317 approved and 743 refused. Refused: about 1 in 5 here, about 1 in 7 across the councils we cover.
Last updated 9 November 2026.
Without planning permission
- Single storey, no higher than 4 m
- No wider than half the width of the original house
- Not facing a road
England, houses only. Flats, listed buildings, conservation areas and Article 4 directions change this. The full rules.
Year by year
| Year | Applications | Approved | Refused |
|---|---|---|---|
| 2026 | 362 | 239 | 40 |
| 2025 | 492 | 385 | 72 |
| 2024 | 535 | 411 | 80 |
| 2023 | 591 | 412 | 139 |
| 2022 | 676 | 437 | 132 |
| 2021 | 689 | 559 | 93 |
| 2020 | 610 | 469 | 84 |
| 2019 | 568 | 405 | 103 |
Neighbouring councils
| Council | Approved | Refused | How often |
|---|---|---|---|
| Bromley | 31,880 | 8,306 | about 1 in 5 |
| City | 72 | 0 | none |
| Croydon | 7,496 | 1,834 | about 1 in 5 |
| Merton | 2,500 | 397 | about 1 in 7 |
| Southwark | 3,514 | 258 | about 1 in 15 |
| Wandsworth | 4,650 | 349 | about 1 in 14 |
| Westminster | 2,406 | 247 | about 1 in 11 |