The minimum share of the equity you can purchase is determined by the Housing Association and you will be required to pay a subsidized monthly rent on the unsold share of the equity to the Housing Association.
However, you may choose to purchase additional shares if that is affordable to you. You may also choose to staircase (buy more shares), as that option becomes affordable to you at a later stage. We have a team of in-house specialist who are able to advise and assist you with this.