Eight-partner firm Bremners specializes in commercial & property law, and acts mainly for housing associations and other registered social landlords.
Bremners was founded in 1837, and employs 30 staff.
The combined firm will call itself Brabners Chaffe Street, and will represent more than 75 clients.
Brabners Chaffe Street employs more than 350 people across offices in Liverpool, Manchester and Preston. The firm has grown in recent years, in part through mergers.