I know this is a "how long is a piece of string" question, but would like to get an idea of the range for typical time spans. Have just had an offer accepted on a house I want to buy. At the same time, my 6-month lease ends in about 6 weeks so I need to sign up for new lease. Landlord is prepared to offer a 6-month lease with a break clause after 3 months, e.g. could give notice after 2 months and leave after 3 months. However 3 months plus the time remaining on this current lease brings it a bit over 4 months from now. I'm just wondering how likely it is that the purchase would have completed by then or alternatively that I'd end up paying a fair bit of extra rent?