How long it will take from your house offer being accepted until you can move into your house will depend on a number of factors. The average process takes 6 to 12 weeks. It can be quicker or slower, depending on the parties in the chain. For example, if you are a first time buyer, purchasing a new build property with a mortgage in principle it could take 4 weeks. However, if you are buying a leasehold property that requires an extension of the lease (non-routine work for which additional charges would apply) this can take significantly longer, between 3 and 6 months.