Firms working closely with IMLA associates can join debates, industry forums, dinners and other events.
Crown is sponsoring an IMLA lunch on 22 May in Central London where it will be introduced to the membership.
It joins nine other firms to make up the IMLA associates list.
Andrew Doyle, managing director of Crown Mortgage Management, said: “We are delighted to be associated IMLA members, particularly as the focus by lenders on the intermediary sector has returned.
“We constantly strive to provide great service to our clients and this relationship will enable us to express our views and interests to others in the sector through discussion and debate.”
Crown Mortgage Management director Godfrey Blight was IMLA chairman in 2008.
Peter Williams, executive director at IMLA, added: “It is great to have Crown on board as an associate and our lunch sponsor.
“These are challenging times for the industry and having access to the expertise of Crown is a real benefit to our members and our market.
“It is also a real pleasure to welcome Godfrey Blight back to IMLA table.”