People aged 50 and above will be able to co-sign a mortgage with their spouses and/or children, but the maximum age for applying is 70. For the first four years, the mortgage rate will be 3.25%, less the minimum retail rate (MRR), or 3.50%; 1% minus MRR for borrowers who are given special lending conditions by the bank; or 0.5% minus MRR for general customers throughout the loan term.