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What are pros and cons of UK Building Societies compared to banks?
they may be willing to issue mortgages with smaller deposits, but may take longer to make a decision That cannot be farther from the truth. If you are getting a mortgage on a smaller deposit, you will be paying a higher interest rate. Time to take a decision depends very much on your credit situation, earnings, spending and the amount of loan you want to avail of. advantages and disadvantages compared to banks today Nothing specifically that is obvious. You deposits are guaranteed by FSCS, which is primarily everybody's biggest concern. One thing I did observe was they generally have saving accounts which pay better than the big banks, but that is for one to compare and find out.  In ownership structure you own a part of the building society because you are a member by having an account(bank/mortgage) with them. Not the case with a big bank though unless you own any shares. You can make a case for the difference of the big bank's multiple business as compared to a building society.