fha loans and condos things to know before buying a condo 5 Things to Know About the New CPF Rules When Buying. – For example, say you’re 40 years old, and your spouse is 37. You both buy a house with a remaining lease of 40 years. This is not sufficient to reach the age requirement of 95: your spouse, the youngest buyer, will only be 77 when the lease runs out. The new rules dissuade younger buyers from.