按揭贷款 mortgage loan
安居工程 Comfortable Housing Project
城镇住房公积金 urban housing provident fund
低价住房 low-cost housing
二手房 second-hand house
房产证 property ownership certificate
现房 complete department (or flat)
期房 forward delivery housing
商品房 commercial residential building
呵呵,这些大家都该清楚吧。