The four plants are Gallagher Group's first external acquisition and take its total number of concrete plants from two to six - more than doubling its annual production capacity, and extending its ready-mix supply network right across Kent.
The company says customers will now be able to deal directly with their local plant and sales team, rather than having to go through a remote central office.
All existing staff at the sites in Tunbridge Wells, Sittingbourne, Margate and Dover will be retained; new driver, supervisory and management roles are also being created.
Gallagher Group says it is making substantial further investment to modernise and upgrade the plants, and is expanding its mixer fleet to match the increase in capacity and geographical reach. The newly-acquired plants join the company’s existing sites at Maidstone and Ashford.
Gallagher Aggregates MD Sean Connor said: “For some years, our ready-mix concrete customers have been asking us to spread our net wider. These new acquisitions let us to do just that. We’re more than doubling our concrete production capacity, and can now offer our unrivalled service and value to customers right across the county.
“We’re investing significant sums in upgrading these sites, as well as adding to our mixer fleet and taking on additional staff."