Based on the paired sales data, what would be the dollar adjustment for a 150 square foot difference in building size?

• A. $10,000
• B. $15,000
• C. $5,000
• D. $20,000

Answer: (B)

In paired sales data you establish a dollar-per-square-foot adjustment for building size, derived from how much price changes when size differs between comparable properties. Once you know the unit adjustment, you multiply it by the size difference to get the dollar amount to adjust.

Here, the unit size adjustment is $100 per square foot. A 150-square-foot difference yields 150 × 100 = 15,000. If the subject is larger, you add this 15,000 to the price of the comparable to reflect the extra space; if the subject is smaller, you would subtract it.