# Finished Floor Area Estimate

Finished Floor Area Estimate. As we promise before, we will post another building construction estimating method related to area of the building. This method is called Finished Floor Area Estimate. This estimating method is different from total horizontal area estimating method.

#### Finished Floor Area Estimate

James E. Rowings Jr. explained that this method is by far the most widely used approach for buildings. With this approach, only those floors that are finished are counted when developing the historical base cost and when applying the historical data to the new project area. With this method, the estimator must exercise extreme care to have the same relative proportions of area to height to avoid large errors.

#### Finished Floor Area Estimate Example

Assume that a historical file contains a warehouse building that cost \$2.4 million that was 50 ft x 80 ft with a basement, three floors, and an attic. Determine the cost for a 60 ft x 30 ft warehouse building with no basement, two floors, and an attic.

Solution for Finished Floor Area Estimate Example

1st Floor = 4000
2nd Floor = 4000
3rd Floor = 4000

TOTAL = 12,000 ft^2fa

\$2,400,000/12,000=\$200/ft^2fa