Can I extend my house in BR4?

A district of pairs and terraces

Much of BR4 is interwar housing: semis, short terraces, and garages beside the house. The projects buyers ask about are predictable: a rear extension, a loft with a rear dormer, a garage conversion, sometimes a two-storey side extension that uses the garage.

The two-storey side extension is the one that most often turns on subservience and the gap to the boundary. A garage conversion is usually simpler unless a condition says the garage must stay available for parking. That condition is property-specific. Ask for the original permission.