R & M Williams Ltd were regional winners of best Commercial Project at the FMB Cymru Master Builder Awards 2017.


They received the award for a £5.4 million project that turned a former warehouse in Swansea into three floors of office and creative space. The warehouse was one of the few examples of Victorian architecture in the area of have survived the Swansea wartime blitz. R & M Williams retained as many of the property’s original features as possible, keeping a sense of the past whilst making the building desirable for modern use. See the Case Studies tab for more information on this project.


About Us


R&M Williams was established by Ron Williams in 1965 in South Wales. In 1990, Mark (Ron's son) took over the family business. The company is now based in both Cardiff and Swansea and comprises of R&M Williams Ltd, JT Merchants and R&M Williams Developments, with a combined turnover of £50 million.


Over the years, R&M Williams have gained a reputation for high quality workmanship in the Construction and Building Maintenance industry. More recently, the development of R&M Williams within New Build housing has seen a significant increase in market share in both private and social housing sectors.


R&M Williams Ltd undertakes projects within the public and private sector across a broad range of value bands in various sectors including refurbishment, heritage schemes, maintenance and new build projects for our clients in education, retail and health sectors and social housing.


We pride ourself on our client relationships and generating repeat orders from valued clients.


We have multiple divisions specialising in several areas:
Construction - Listed Buildings & Restoration, New Build Construction in varying sectors including Education and Health
Maintenance - Refurbishment, Welsh Housing Quality Standards, Planned & Reactive Maintenance
Trade - Painting & Decorating providing superior finishes
Developments - Design & Build, New Build Housing in the Private and Social Housing Sectors
Services - Mechanical & Electrical Installations & Maintenance


We work throughout Wales.

Trades offered

Handyman and maintenance
Builder general
Painter and Decorator
Interior decorating

Case studies

Urban Village, Swansea - Winner of the Commercial Project category at the Cymru Master Builder Awards 2017

  • 05 Jan 2018

See more case studies

FMB award winner

Wales Building Company of the Year
Wales Building Company of the Year