Over-Building Home Addition
It is the situation in a specific area where there has been more real estate construction than the market can actually support or absorb within a reasonable time. In the case of home improvement, it means spending too much on the improvement project or doing home changes and renovations that are more than necessary. To avoid over-building, the home owner should compare the value of his or her home if renovations will considerably increase its value more than others in the neighbourhood.

Over-building renovation
A home is overbuilt if it is renovated to accommodate three or four bedrooms and two bathrooms when the rest of the houses in your area only have two bedrooms and one bathroom. In the long run, this will cost home owners their investment. If you cannot help it, might as well sell your current home and re-invest your money in a larger home in a different neighbourhood.