The enclosed standard is a voluntary guideline for use in the measurement, calculation, and communication of residential square footage. Presented for the professional calculation of square footage in single-family homes. The methodology utilized in the American Measurement Standard is similar to what the majority of agents and appraisers currently use, but contains a great deal more guidance on numerous issues previously left subjective. This standard will help to promote consumer protection and it also allows Big Data to become Better Data. The future of big data and consumer protection requires one language of square footage. For residential square footage by all real estate professionals.