The lender said the move was the first of several agreements with network partners which will come over the next six months.
Its entire mortgage range was previously available to Legal & General’s Key Partner firms, but this latest move will enable all Legal & General Mortgage Club members access to the society’s products.
Ipswich Building Society head of mortgage sales Kate Ley said: “Over the next six months we’re really looking to expand our distribution.
“We’ve grown a reputation for being particularly active in specialist mortgage markets, such as expat and self-build, and we’re grateful for the broker support we’ve had in this area to date.
“We’re now in a position to be able to extend the opportunity to access our products to other brokers and a wider variety of their clients.”
Ley added that the mutual was looking forward to working alongside Legal & General Mortgage Club to strengthen its broker relationships nationwide.
Danny Belton, head of lender relationships at Legal & General Mortgage Club noted that regional building societies played an important role in the industry.
“We’ve had great feedback from our advisers who have already placed business with Ipswich Building Society, and we are pleased to be extending their terms to offer products to all of our club members.”