Loft conversions and dormers in Sefton
1,036 applications since 2020. 754 approved and 51 refused. Refused: about 1 in 16 here, about 1 in 6 across the councils we cover.
Last updated 8 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 |
|---|---|---|---|
| 2027 | 1 | 0 | 0 |
| 2026 | 119 | 74 | 2 |
| 2025 | 136 | 94 | 5 |
| 2024 | 117 | 81 | 7 |
| 2023 | 156 | 111 | 8 |
| 2022 | 164 | 119 | 7 |
| 2021 | 214 | 177 | 9 |
| 2020 | 129 | 98 | 13 |
Architects and agents, last 5 years
| Firm | Approved | Decided |
|---|---|---|
| Clayton Architecture Limited | 57 | 58 |
| Whiteside Building Design Ltd | 26 | 29 |
| Philip Seddon Associates Ltd | 17 | 17 |
| David Machell Architecture Ltd. | 15 | 15 |
| Highline Architecture Ltd | 9 | 9 |
| Architectural Design Associates | 8 | 8 |
| Rod Ainsworth Architect | 8 | 8 |
| Diaz Associates | 7 | 7 |
| Crowley Architectural Services | 6 | 7 |
| Adrian Design | 6 | 6 |
Neighbouring councils
| Council | Approved | Refused | How often |
|---|---|---|---|
| Knowsley | 0 | 0 | none |
| West Lancashire | 346 | 78 | about 1 in 5 |