Rear extensions in Allerdale
2,914 applications since 1987. 2,441 approved and 81 refused. Refused: about 1 in 31 here, about 1 in 7 across the councils we cover.
Last updated 8 November 2026.
Without planning permission
- Up to 3 m deep on a terrace or semi, 4 m on a detached house
- Up to 6 m or 8 m through the neighbour-consultation route, not on protected land
- No higher than 4 m, and eaves no higher than 3 m within 2 m of a boundary
- Together with other buildings, no more than half the garden and grounds
- Materials similar in appearance to the house
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 | 74 | 48 | 0 |
| 2025 | 72 | 64 | 0 |
| 2024 | 63 | 55 | 1 |
| 2023 | 61 | 53 | 1 |
| 2022 | 94 | 85 | 0 |
| 2021 | 117 | 90 | 1 |
| 2020 | 98 | 72 | 2 |
| 2019 | 95 | 72 | 0 |
| 2018 | 98 | 60 | 3 |
| 2017 | 98 | 60 | 6 |
| 2016 | 88 | 63 | 4 |
| 2015 | 81 | 47 | 1 |
Neighbouring councils
| Council | Approved | Refused | How often |
|---|---|---|---|
| Carlisle | 1,114 | 14 | about 1 in 81 |
| Lake District | 1,472 | 71 | about 1 in 22 |
| Westmorland and Furness | 3 | 0 | none |