You can gain additional shares in your shared ownership property through a process known as "staircasing." This entails gradually acquiring more ownership shares in the property. First, you need to have the property valued to determine the current market value of the shares you want to buy. Then following the valuation, you can secure financing, usually in the form of a mortgage to cover the cost of the additional shares. Staircasing enables you to gradually increase your ownership of the property, potentially lowering your rent and bringing you closer to full ownership.