Side extensions in Stevenage
506 applications since 2020. 417 approved and 58 refused. Refused: about 1 in 8 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 | 47 | 32 | 6 |
| 2025 | 50 | 40 | 6 |
| 2024 | 55 | 46 | 6 |
| 2023 | 59 | 55 | 3 |
| 2022 | 92 | 79 | 9 |
| 2021 | 116 | 93 | 16 |
| 2020 | 87 | 72 | 12 |
Neighbouring councils
| Council | Approved | Refused | How often |
|---|---|---|---|
| East Hertfordshire | 2,197 | 712 | about 1 in 4 |
| North Hertfordshire | 2,031 | 131 | about 1 in 17 |