Yes, you can use the Help to Buy scheme to buy a house. Although you need to have sold your previous house before the purchase of the new house. A client is only allowed to move in once the transaction has been finalised. There is no reason to wait unless there are some errors in your application or transaction. In the case of Shared Ownership, some people are wondering if they will be using the Help to Buy scheme for a house with another person. According to the Help to Buy guide, that is not the case. The Shared Ownership only means the housing association holds the remaining share and you will pay it off as rent. It means you can use the Help to Buy scheme without worries about sharing it with another person.