For non-housing, Part M guidance ‘Design of buildings and their approaches to meet the needs of disabled people – Code of practice’. FAQ section of the Department for Communities and Local Government (DCLG) website relating to Part M. The guidance provided in BS 8300 is also considered applicable to existing as well as new buildings and extensions.The present edition of BS 8300 no longer gives guidance on individual dwellings, which are now covered in DD 266 : 2007 withdrawn-replaced by BS 9266 : 2013. However, some of the recommendations given in BS 8300 could be used to supplement guidance on the design of dwellings where appropriate.