Hi Sarah Lenders usually ask that term is no less than 45-50 years on average Therefore if you take a 25 year mortgage there is around 25 remaining It also depends on the value of the property and location (W1 is good) Studios are becoming more difficult to get mortgages on,not impossible though. 1 bed may be better choice if within price range You can of course extend the lease,with permissions from the freeholder Seek legal advice on this Regards Andy