Contact:
  • Building Control
  • Address:
    Trimbridge House
    Trim Street
    Bath
    BA1 2DP
  • E-mail:
    building_control@bathnes.gov.uk
  • Telephone:
    01225 477517
  • Fax:
    01225 477637
  • Minicom:
    01225 477647 (Textphone only- do not use for any other calls)
  • Page Updated:
    17/09/2008
  • Author:
    Building Control
A to Z Index

Building Control Service

Loft conversions

If the work involves any new accommodation in the roof space (bedroom, spare bedroom, study, occasional playroom, etc), or any structural alterations (adding or removing joists, installing a roof light if it involves trimming the rafters, etc), then you will need to make a Building Regulations application.

If it involves any alteration to the size or external appearance of the building, then Planning Permission may also be required. Please check with the Development Control section before undertaking any such work.

What things do I need to consider?

The following guidance only applies to a loft conversion of no more than two rooms and a floor area of no more than 50m² in an existing one or two storey single-family dwelling house. For advice on any other type of building, please contact the Building Control section.  The information in the following pages is for guidance only. Loft Conversions often involve complex construction issues and you are advised to use the services of a qualified architect or surveyor if you are thinking of undertaking such work on your property.

Structural stability
Fire safety
Sound insulation
Ventilation of rooms and roofs
Sanitary facilities and drainage
Stairs and guarding
Thermal insulation