Extensions £5,000 upwards depending on size

Estimated time taken (6 to 8 Weeks)

Largely depends on size of extension, timescale would be discussed prior to work commencing.

For this project, building regulations are required, planning permission is not always required,

depending on size and position of extension.

What’s involved?

Dig out footings and concrete with approval of local building inspector.

Build extension to match existing building.

Form roof; either flat or pitched.

Fit windows and doors where needed

Form timber/concrete floor

Fit ceiling spars, insulate and plasterboard

Plaster all internal walls


Doors, skirting boards, architraves to match existing


Carried out by a Part P Approved electrician

Sockets and lights where needed


Carried out by a Gas Safe Approved plumber

Radiators and hot/cold water where needed

Project details

  • Estimated time taken

    6 – 8 weeks

  • Cost

    £5000 upwards dependent on size