各位有識之士 :　 以下是本人想知道關於香港樓宇樓齡太舊可怎樣　？ 如香港樓宇樓齡太舊但不是危樓，可住多少年 ? 如香港樓宇樓齡太舊已成危樓不能住，是否只能搬走，單位全無價值一無所有 ?爛船會否剩餘3 根釘 ? Thank You !?

1. No such limit exists.

For example, Mei Foo Sun Chuen is a real estate development that has been built for 40-50 years. Still, it is a popular choice of many potential buyers.

2. Not necessary - being dangerous does not mean it is worthless, although the value will be impacted.

Being dangerous simply means there are structural issues that makes the building dangerous to be inhabitable. If the structural issues are fixed, then the building can be inhabitable again. Also - the building can be sold to the developer for re-development.