Home size is one of the key figures used in comparisons. But you may have different measurements to choose from,  as you’ll learn in this video, including builder, appraiser, tax records and possibly owner records. Which one is right, and which one is best? The official figure is the one in tax records – typically, the county. Any other figure must be documented by a builder’s floor plan an appraisal or an official floor plan, prepared by a company for a fee. If your house has been remodeled and you’re planning to sell you may want to confirm that the official record matches your actual house – and update if required. Most lenders will require an appraisal which will verify the figures you used. So be accurate and keep records to make the most of your sale.