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Floor Area Measurement Standards

These standards are not laws, but voluntary standards that serve to bring measurement consistency and comparability between properties in the real estate markets in which they are used. Click on the links below to find out more about each standard.

Please note that Building Area Measurement LLC does not sell or distribute these standards. Information on how to obtain them from their publishers is included on each page.

• The BOMA Office Standard is the prevalent standard for measuring leased office space in the United States outside the metropolitan areas of New York and Washington, D.C.
• The BOMA Industrial Standard is a new standard released in October of 2004 by BOMA and SIOR for measurement of industrial and warehouse properties.
• The REBNY Standard is used to measure leased office space in the New York metropolitan area, including nearby parts of Connecticut and New Jersey.
• The GWCAR Standard is used to measure leased office space in the Washington, D.C. metropolitan area, including nearby parts of Maryland and Virginia.
• The IFMA Standard is used nation-wide for floor area measurements for facility management, occupant requirements, space planning and strategic facility planning.
• The AIA Standard addresses the calculation of architectural (construction) area and volume of buildings.
• The NAHB Standard addresses the calculation of residential floor areas in detached and attached single-family homes.
• MORE STANDARDS.