Rear, side, wrap-around, double-storey — types, planning, cost.
Single-storey rear extensions: PD limits, design ideas, costs.
Side return on Victorian/Edwardian terraces: typical £45-70k all-in.
When you need full planning vs PD for L-shaped extensions.
Two-storey rear extensions: design, neighbour management, cost.
Layouts, light, and what wins planning approval.