The answer?

Home inspections usually involve the inspection of 10 different systems. Roof, Exterior, Structure, Interior, Heating, Air Conditioning, Electrical, Plumbing, Ventilation / Insulation and Appliances. All ten systems are inspected and reported on.

With a 4 point inspection, 4 of the major systems are inspected, Roof, Foundation, Electrical and Plumbing, since these are the systems that are usually of most concern and are the most expensive to repair. In this way, the majority of the house's major systems are inspected and reported on and the inspection costs a little less than a full inspection.

A 4 point inspection is an inexpensive alternative to a full home inspection and a good compromise to not having any home inspection at all. 4 point inspections are also available for home seller's who want to know what a buyer's home inspector might find.