You need to pay at least a 5% deposit. This means that if you were buying a property for £200,000 you would pay a deposit of £10,000 and get a mortgage for £190,000. You’ll pay a lower interest rate if you put down a larger deposit, though, with the best deals available for borrowing up to 60% of the property’s value, so it’s worth paying as big a deposit as you can.   It’s possible to borrow up to 100% of the property’s value if a family member acts as a guarantor by providing savings or property to act as security for the loan but you’ll pay a relatively high interest rate.