Navigating Outbuilding Permitted Development: A Recent Project Case Study
BLOG POST TWO - Navigating Outbuilding Permitted Development: A Recent Project Case Study
At Pont + Wils Architects, we often help homeowners in Surrey and the Home Counties create functional garden outbuildings, from home offices and studios to gyms and guest rooms. A recent project in Elmbridge demonstrates how careful permitted development (PD) planning can deliver practical outbuildings while ensuring full compliance with UK planning rules.
Our client wanted a substantial garden outbuilding with a shower room, but no kitchenette. This distinction was key, as the absence of a kitchen meant the structure would not be considered a separate dwelling, keeping it firmly within permitted development rights.
To maximise usable interior space, the outbuilding was positioned over 2 metres from the side boundary, allowing us to design it at full height under PD rules. This approach avoids height restrictions that apply to structures closer to neighbouring boundaries.
During construction, Elmbridge Borough Council were tipped off about the building. I visited the site to meet with the enforcement officer, reviewing the outbuilding against permitted development regulations and our client’s Certificate of Lawful Development for the proposed use. The officer confirmed that the building met all criteria, demonstrating how clear communication with the local authority can prevent enforcement issues.
Permitted Development Rules for Garden Outbuildings
Homeowners should be aware of the following key PD rules in England:
Single-storey only, with a maximum height of 4 metres for dual-pitched roofs or 3 metres for other roof types.
Maximum eaves height of 2.5 metres if within 2 metres of a boundary.
No kitchen allowed, ensuring the building is not treated as a separate dwelling.
Total footprint must not exceed 50% of the garden (excluding the original house).
By carefully following these guidelines, we delivered a lawful garden outbuilding with a shower room that maximised usability without triggering a full planning application.
This Elmbridge project highlights the importance of permitted development compliance, boundary-aware design, and proactive engagement with the local planning authority. It’s a clear example of how homeowners can achieve functional, stylish, and fully lawful garden outbuildings in Surrey with the right architectural guidance.