Planning Permission and Permitted Development
Many single-storey rear extensions fall under permitted development and do not require planning permission, subject to size limits. Side and double-storey extensions, and those on properties in conservation areas, generally require a full planning application. Your builder should confirm what applies to your specific property before any other decisions are made.
What to Expect During the Build
A building extension involves groundwork and foundations, structural walls and roof, windows and external doors, insulation to current standards, and internal fit-out including electrical, plumbing if required, and plastering. A well-managed project will have a clear programme of works and a lead contractor who coordinates all trades on your behalf.
Dartford is a town in Kent, best known for the Dartford Crossing — the bridge and tunnel crossing of the River Thames on the M25 motorway. The town was the birthplace of Mick Jagger and Keith Richards of the Rolling Stones, a fact celebrated in the town. Dartford has good rail links to London and is seeing significant housing and commercial development as part of the Thames Gateway regeneration area.
Building Regulations and Structural Calculations
All extensions require Building Regulations approval regardless of whether planning permission is needed. Structural calculations by an engineer will be required for any load-bearing work. Your builder should manage the Building Regulations application and arrange inspections at the required stages of construction.