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.
Derby is a city in the East Midlands with a strong industrial heritage, particularly in the railway industry — the Midland Railway was headquartered here. Rolls-Royce has been a major employer in Derby since 1908 and the city remains a centre for aerospace manufacturing. Derby Cathedral is a Grade I listed building. Derby County FC plays at Pride Park Stadium. The Peak District National Park is easily accessible from the city.
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.