Side extensions in Darlington
1,129 applications since 2016. 1,046 approved and 41 refused. Refused: about 1 in 27 here, about 1 in 7 across the councils we cover.
Last updated 8 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 | 50 | 44 | 1 |
| 2025 | 93 | 83 | 5 |
| 2024 | 74 | 71 | 2 |
| 2023 | 109 | 96 | 5 |
| 2022 | 123 | 112 | 9 |
| 2021 | 148 | 136 | 8 |
| 2020 | 117 | 112 | 1 |
| 2019 | 108 | 98 | 2 |
| 2018 | 110 | 104 | 3 |
| 2017 | 99 | 95 | 3 |
| 2016 | 98 | 95 | 2 |
Architects and agents, last 5 years
| Firm | Approved | Decided |
|---|---|---|
| P A Designs Architects Limited | 12 | 12 |
| Endeavour Design | 9 | 10 |
| Blu Room Architecture | 9 | 9 |
| DH Drawings Ltd | 9 | 9 |
| cummings architects ltd | 9 | 9 |
| Keystone Architectural Surveying & Developments | 7 | 9 |
| Pyramid Architectural Designs | 7 | 8 |
Neighbouring councils
| Council | Approved | Refused | How often |
|---|---|---|---|
| Durham | 2,883 | 75 | about 1 in 39 |
| Stockton-on-Tees | 1,338 | 49 | about 1 in 28 |