Side extensions in Flintshire
3,060 applications since 1978. 2,714 approved and 245 refused. Refused: about 1 in 12 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 | 50 | 35 | 0 |
| 2025 | 77 | 66 | 4 |
| 2024 | 73 | 67 | 4 |
| 2023 | 70 | 60 | 7 |
| 2022 | 84 | 79 | 3 |
| 2021 | 132 | 118 | 6 |
| 2020 | 96 | 91 | 4 |
| 2019 | 88 | 83 | 5 |
| 2018 | 87 | 80 | 6 |
| 2017 | 107 | 101 | 3 |
| 2016 | 83 | 76 | 6 |
| 2015 | 82 | 76 | 5 |
Architects and agents, last 5 years
| Firm | Approved | Decided |
|---|---|---|
| JNL Design | 18 | 21 |
| A.F Architectural Designs | 16 | 16 |
| d2 architects | 15 | 19 |
| JIG Architects Ltd. | 13 | 13 |
| Deeside Architectural Design Ltd | 7 | 8 |
| Sustain Architecture | 7 | 7 |