Average Life Expectancy of All Components in a House

This document provides the average life expectancy of the various components of a structure, including its mechanical operation. Numerous factors affect the normal life expectancy, including the weather, the location of the building in regards to the compass (cardinal) points, predominant wind direction, hills, lot slope, surrounding structures, quality of the workmanship, the quality and frequency of the maintenance.

These figures are just averages and should be taken as a simple guideline as to what to expect. If a hot water tank has an average life span of 10 years, and yours is 10 years old - it could rupture or stop working this year, or it could last another several years. During your pre-purchase inspection process you may discover some elements, material or items, which are past their normal life expectancy. Make a note of these and discuss with your real estate representative to see what further action you can take, if any at all. Ask your building inspector to provide you with some direction, timeline and budget amount for the possible replacement and maintenance of the house components.