"Maintaining Building Excellence"

R&M Williams Building Group based in Cardiff and Swansea, comprises of R&M Williams Ltd, JT Merchants and R&M Williams Developments; the Group Structure supports a combined turnover of over £50million.

R&M Williams Building Group headed by Chairman, Mark Williams, has gained a reputation for high standards of workmanship in the Construction and Building Maintenance industry and 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.

As a client focused organisation, projects are delivered to the highest safety standards to exceed client expectations.

R&M Williams prides itself on its ability to generate repeat orders from valued clients.

We are ISO9001, ISO14001 & OHSAS18001 registered and apply these quality systems within each and every contract.


Please click here to see the R&M Williams Timeline - showing how we got where we are today








This year is a very special year for the R&M family as we are celebrating our 50th anniversary.