If the building contains an elevator, the latter should be examined as to its speed, smoothness of running, and its size. Note should also be taken of the finish of the interior of the car, as a slight indication of the quality of the workmanship. Expert advice may be taken as to the electric equipment of the elevator, but this is hardly necessary except in large and important buildings.

The electrically run elevator is practically universal in apartment houses, business buildings, etc. The plunger elevator, which is a combination electric and hydraulic one, seen in large office buildings and in some apartment houses, is much more expensive to install, but has the additional factors of safety and speed, which is much desired in high buildings. The ordinary steam powered hydraulic elevator is now rarely used.