Principality is currently the seventh largest building society in the UK.
Martyn Smith, head of mortgage products at L&G Mortgage Club, said: “I am delighted to welcome Principality to the Mortgage Club.
“Their success in delivering quality products and service to their customers is down to their commitment to offer attractive and competitive rates and build strong personal relationships.
“Our members now have greater choice with access to an established and respected player in the mortgage market.”
Jason Newsway, head of intermediary sales at Principality Building Society, said: “We are delighted to be joining the Legal & General Mortgage Club.
“We recognise the challenges facing the intermediary market and our team of dedicated Business Development Managers have the expertise to help and support brokers from application through to completion.
“We are looking forward to working with Legal & General’s appointed representatives over the coming months."
