Mid and East Antrim Mayor Gerardine Mulvenna attended a renaming of the building as Killagan House, in recognition of the homeplace of the brothers founding the company.
Established in 1978 by John Francis and Hector Dowds, the Group merged its Belfast and Ballymoney offices last year and relocated to the new headquarters.
It has more than 210 employees and operates an office at King’s Cross in London.
Supplying building services, construction, facilities management and energy solutions, its diverse portfolio of multi-million-pound projects includes Ulster University Belfast, Nightingale Hospital in Whiteabbey and the Royal College of Music in London.
James Dowds, Managing Director of Dowds Group, said, “We are delighted to make Killagan House and Ballymena our new home. The investment in our new state-of-the-art facilities not only allows us to bring our NI team together under one roof but has the capacity to accommodate our future growth.”
