Our business model is a simple, uncomplicated formula for success, making Leeds Building Society a safe home for our customers' savings Our members' interests really do come first at Leeds Building Society Our successful, sustainable business model continues to deliver excellent financial results providing security and value for our members As a genuine mutual society, owned by our members, we can offer our customers advantages many other financial organisations simply cannot match.. Based in the heart of Leeds - the UK's main financial centre outside London - we have been helping people buy their own homes for over 125 years