Loft conversions and dormers in Stevenage
157 applications since 2020. 129 approved and 16 refused. Refused: about 1 in 9 here, about 1 in 6 across the councils we cover.
Last updated 9 November 2026.
Without planning permission
- Up to 40 cubic metres of extra roof space on a terrace, 50 on a semi or detached house
- Not on the roof slope facing a road, and no higher than the existing roof
- Materials similar in appearance, set back about 0.2 m from the eaves, and side windows obscure-glazed
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 | 17 | 14 | 1 |
| 2025 | 19 | 15 | 1 |
| 2024 | 27 | 24 | 2 |
| 2023 | 20 | 17 | 2 |
| 2022 | 24 | 19 | 3 |
| 2021 | 32 | 25 | 5 |
| 2020 | 18 | 15 | 2 |
Neighbouring councils
| Council | Approved | Refused | How often |
|---|---|---|---|
| East Hertfordshire | 1,168 | 400 | about 1 in 4 |
| North Hertfordshire | 1,080 | 120 | about 1 in 10 |