What is Permitted Development?
Permitted Development (PD) rights allow homeowners to perform certain types of building work without having to apply for full planning permission. In London, where planning can be notoriously strict and time-consuming, understanding your PD rights can save months of delay and thousands of pounds.
The Rules for Rear Extensions
Under current regulations, you can generally extend a terraced or semi-detached house by up to 3 metres, and a detached house by up to 4 metres. With the Larger Home Extension scheme (subject to the neighbour consultation scheme), this can be doubled to 6 metres and 8 metres, respectively.
Loft Conversions under PD
Most loft conversions, including rear dormers and hip-to-gable extensions, fall under PD rights, provided they do not exceed 40 cubic metres of additional roof space for terraced houses (50 cubic metres for detached/semi-detached). However, there are strict limits on height and materials used.
Exceptions and Constraints
It is vital to note that PD rights are often restricted or completely removed if you live in a Conservation Area, a National Park, or an Area of Outstanding Natural Beauty (AONB). Flats and maisonettes also do not have PD rights.
Always apply for a Lawful Development Certificate before commencing work under PD rights to guarantee your build is fully compliant.