Pamela,
The other answers are on the money. For Tax records the square footage is taken mostly off the plans, when under construction the plans measurements represents the stud face. Then on the studs you add the sheathing and then the siding, that alone will add from 1-1/2 to 5 inches to the outside of the wall. so if an agent is figuring the square footage of a property by measuring outside to outside a property will be from 3 inches to 10 inches larger all around. Even though locally we use square footage, many areas do not you can build a 1,000 sq, ft. house for the same value as a 2,0000 square foot home, its all in the finish and amenities included. In plain english its not always the footage but the quality. - Mon Sep 7 2009, 08:44