The account was previously held by Maitland.
Last month Bovis Homes reported a 47.4 per cent rise in full-year pre-tax profit to £168.1m, which was ahead of market expectations. It came off the back of a three per cent rise in the number of units in completed (3,759) in the year.
Susie Bell, head of investor relations at Bovis Homes, said: "We appointed Powerscourt because of their excellent sector knowledge, impressive media skills and creative thinking. We’ve made great progress in the last two years following a challenging period for the business and believe that Powerscourt is the ideal partner to help us tell the next chapter of the transformation story that has put the customer back at the heart of everything we do."
Justin Griffiths, partner at Powerscourt, said: "Bovis Homes has undergone enormous change in recent times and we are relishing the prospect of working with the management and communications teams to help them reclaim and develop their corporate narrative, while further educating the City on their compelling equity story."
Powerscourt, which was founded in 2004 by former Sunday Times business editor Rory Godson, grew revenue 22 per cent to £8.3m in 2017, according to the most recent PRWeek UK Top 150 Consultancies report. It employs 50 people in London and five in Dublin.