Planning Permission Information
✅ Structures Generally Exempt from Planning Permission
- Size: Total floor area (including similar structures) does not exceed 25m².
- Location: Structure is behind the front wall of the house (not in front).
- Open Space: At least 25m² of private open space remains in your garden.
- Height:
- Max 4m with tiled/slated pitched roof.
- Max 3m with other roof types.
- Use: Not for human habitation or commercial use.
- Appearance: If beside house, must match the external finish of the house.
- Windows: No windows within 1m of neighbour’s boundary.
⚠️ When Planning Permission Is Required
- Size exceeds 25m²
- Used for human habitation (e.g., modular home)
- Placed in front of house (in front of building line)
- Reduces private garden to less than 25m²
- Located in a protected or conservation area
- Used for commercial activity
Proposed Changes for Modular Homes and Granny Flats
There is a government proposal to allow detached modular units up to 40m² without planning permission under certain conditions. These changes are not yet in effect.
Additional Considerations
- Property Tax: May impact Local Property Tax (LPT).
- Building Regulations: Must comply even if planning permission is not needed.
- Consult Local Authority: Rules can vary by location.
✅ Summary Table
| Structure Type | Planning Permission Required? | Notes |
|---|---|---|
| Garden Shed (<25m²) | No | Must meet exemption criteria |
| Home Office (<25m²) | No | Personal use only; not habitable |
| Greenhouse (<25m²) | No | Must adhere to size and location restrictions |
| Modular Home | Yes | Required if for human habitation |
| Modular Extension | Yes | Required if exceeding exemption limits |
For more info, visit Citizens Information or contact your local authority.
Sean Brett
