To celebrate the launch, Dudley is offering two 2-year discounted products up to 75% loan to value exclusively for mortgage club members.
The current rates are 2.75% with a £995 arrangement fee and 3.24% with no fee.
Both products are available for purchase and remortgage.
Martyn Smith, head of mortgage products at Legal & General Mortgage Club, said: "I am delighted to welcome Dudley to the mortgage club.
"Their knowledge of the local communities they serve and ease of doing business, such as their flexibility of approach to underwriting, means that mortgage club members now have access to an established and respected player in the mortgage market that will work with them to best meet the needs of their customers.”
Tim Taylor, commercial director Dudley Building Society, said: “We believe club members will enjoy benefiting from the service on offer at the Dudley, from the friendly personal service, through to our flexible underwriting and ability to make quick decisions."
Dudley Building Society has been providing mortgages and other financial services to customers living in the West Midlands area for over 150 years.