Borrowing is based on affordability, just like a standard mortgage. Many lenders use income multiples as a starting point, often around four to four-and-a-half times salary, but this is then adjusted for rent, service charges and monthly commitments.
The final borrowing figure depends on income, deposit, credit history and the overall cost of the shared ownership property.
Your home may be repossessed if you do not keep up repayments on your mortgage.
You may have to pay an early repayment charge to your existing lender if you remortgage.