The First Thing to Understand
Building extensions are among the most significant home improvement projects a property in Brighton can undergo, and the right approach depends heavily on the specific property, its position on the plot, and what Brighton and Hove City Council will permit in the BN1-BN3 area. Whether a single storey rear extension, kitchen extension, or side return extension is planned, the starting point is always a clear understanding of what the local authority will permit. Many single-storey rear extensions in Brighton and surrounding areas such as Hove, Portslade and Shoreham fall under permitted development — but side extensions, double-storey extensions, and properties in conservation areas almost always require full planning permission.
Brighton is a seaside city on the East Sussex coast, known as London by the Sea due to its popularity with Londoners. The most popular house extension type is the open-plan kitchen and dining extension at ground floor level, which creates a significant improvement to everyday living without adding a second storey. Famous for the Royal Pavilion, Brighton Pier, the Lanes shopping area, and a vibrant arts and music scene. Brighton has a significant LGBTQ+ community and hosts one of the largest Pride events in the UK. The University of Brighton and University of Sussex contribute to a young and diverse population.
What to Expect from a Brighton Building Extension
Across Brighton and the local areas of Hove, Portslade and Shoreham, the most common extension type is the single-storey rear kitchen and dining extension, which creates an open-plan living space at ground floor level. A well-managed project will have a clear programme of works from groundworks and foundations through to structural walls, roof, windows, and internal fit-out. Your builder should act as principal contractor and coordinate all sub-trades — electrical, plumbing, and plastering — rather than leaving you to manage each separately.
Building Regulations and Planning in Brighton BN1
Brighton and Hove City Council administers both planning and building control across Brighton and areas including Hove, Portslade and Shoreham in the BN1-BN3 postcode area. All extensions require Building Regulations approval regardless of whether planning permission is needed, and structural calculations by an engineer will be required for any load-bearing work. Your builder should manage the Building Regulations application to Brighton and Hove City Council and arrange inspections at the required stages — confirm this is included in the written quote before any work begins.