The Federation of Master Builders (FMB) is the UK's largest trade association in the building industry, with national offices in England, Northern Ireland, Scotland and Cymru, supported by additional regional offices.

Established in 1941 to protect the interests of small and medium-sized building firms, the FMB is independent and non-profit-making, lobbying continuously for members’ interests at both national and local levels.

The FMB is a source of knowledge, professional advice and support for building firms right across the UK. The FMB also offers practical advice and support to the general public on choosing and working with the right builder.