Catalyst owns and manages 34,000 homes in London and the south east of England, and Rosebery has around 2,700 in Epsom and the surrounding areas.
Discussions between the two organisations began in August last year, with both teams exploring the benefits of a partnership that would see them working together across the region to create more homes in well-designed neighbourhoods.
Very early in the discussions, both sides said they came to the realisation that there was “considerable synergy” between them – particularly in regard to their culture, aims, and objectives.
Working in partnership, Rosebery will operate as a subsidiary of Catalyst and will have its own board and management team, operating within a defined geographic area.
The partnership has an aspiration to deliver 2,000 new homes in Rosebery’s area of operation within 10 years.
Ravi Rajagopal, chair of Catalyst, said: “The strong values and local expertise of Rosebery, as well as their excellent reputation made them an attractive potential partner and we’re pleased to welcome them to the Catalyst Group.
“I very much look forward to working together and welcoming Christine to the Catalyst board as we deliver on our ambitions to provide much needed affordable housing in the area.”
Ian McDermott, chief executive of Catalyst, said: “Catalyst has been open to gradual growth opportunities, and this partnership fits our philosophy of being able to build more homes in a thoughtful, considered way.
“I look forward to working with Christine and colleagues across Rosebery to deliver on the potential of this partnership.”
Christine Turner, chair of Rosebery’s Board, said: “This partnership is a great achievement for both organisations and we look forward to working with our new partners.
“Catalyst and Rosebery have a lot in common. We are both values-driven, we believe in doing the right things, and we pride ourselves on our strong governance.
“These are the key ingredients of what I am sure will be a successful and enduring partnership with Catalyst.”
Rosebery chief executive Deborah Pike said: “We are delighted to have created this partnership with Catalyst, and the future looks bright for both organisations.
“Throughout the months we’ve spent in these discussions, the relationship between our teams has been really positive.
“We are looking forward to more people connecting and learning from each other as the partnership grows and develops.”
Are you a social housing professional? Sign up for a FREE MEMBERSHIP to upload news stories, post job vacancies, and connect with colleagues on our secure social feed.