Garden rooms and outbuildings in Monmouthshire
1,164 applications since 2020. 1,049 approved and 24 refused. Refused: about 1 in 45 here, about 1 in 7 across the councils we cover.
Last updated 9 November 2026.
Without planning permission
- Single storey, not in front of the house
- No higher than 2.5 m within 2 m of a boundary; otherwise 4 m with a dual-pitched roof or 3 m any other
- Together with other buildings, no more than half the garden and grounds
- For use incidental to the house, not a separate home
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 | 126 | 101 | 0 |
| 2025 | 152 | 131 | 5 |
| 2024 | 127 | 118 | 2 |
| 2023 | 162 | 150 | 2 |
| 2022 | 200 | 180 | 7 |
| 2021 | 202 | 185 | 6 |
| 2020 | 195 | 184 | 2 |