Look closely at the age of major home systems while shopping. Homes that have been built, or had their major systems replaced, in the past 15 years have a better chance of passing through the inspection process. The older the system, the more likely that it will require a costly repair or replacement in the near future.
Furnace/Heat Source - Target 1-14 years of age - Furnaces and other heat sources typically have an industry lifespan of 14-18 years. So the newer, the better!
Air conditioning - Target 1-14 years of age - AC units typically have an industry lifespan of 15-20 years
Water Heater - Target 1-8 years of age - Water Heaters typically have an industry lifespan of 8-12 years
Roof appearance -- average-good condition, with no deformities or patches. Roofs are expensive to replace and active roof problems can trigger other repair needs.