BSM specialise in bespoke joinery and building work. Our commitment to quality workmanship and bespoke services has led to an unrivalled reputation in the building industry in Lancashire. BSM can offer a complete range of building services and project management, get in touch for more information.   We are fully insured and  certified building contractors based in Darwen and serving the heart of Lancashire and surrounding areas. BSM can undertake a wide range of building services including house extensions, loft conversions, replacement doors and windows, internal joinery and staircases