If we talk about rental system, it completely depends upon the age of building. The building of old age is not supposed to be as costly as the new building is. As we know that real estate do not comes into the category of depreciable asset, but still, the building with age factor more than twenty loses its rental market value. The fact behind it is the use of old fittings and loss of elegance with time. Most of the people prefer well maintained modern house for rental purpose.