If you are aged 55 and above and had pledged your home to withdraw your Retirement Account savings in cash, you will need to refund the pledged amount on top of the principal CPF withdrawn and the accrued interest when you sell your home. The monies refunded will be used to top up your Retirement Account up to your Full Retirement Sum. After this, any balance housing refunds will be paid to you in cash within one week after the CPF refund was credited to your CPF account.
For your next property purchase, you can still use your monies in your Ordinary Account as well as the Retirement Account savings above your Basic Retirement Sum.