For more than a century, BOMA International has set the standard for measuring buildings. In 1915, BOMA published its first office standard, Standard Method of Floor Measurement. Throughout the years, the standard has been revised to reflect the changing needs of the real estate market and the evolution of office building design. Today, BOMA International is the American National Standards Institute (ANSI) secretariat for a suite of area measurement standards.
BOMA International's Standards are available in print or digital formats. Your digital purchases come with perpetual access through the BOMA/BOMI Learning Portal and VitalSource Bookshelf. While PDFs are no longer offered, you can conveniently access your publications through the Bookshelf online platform as read-only documents or via the Bookshelf app for offline reading. Plus, full printing capabilities are available to ensure you have the flexibility you need. Please note that your access will start 24 hours after purchase.
BOMA 2024 for Office Buildings
Standard Methods of Measurement (ANSI/BOMA Z65.1-2024)
This standard is intended exclusively for Office Buildings and their associated structures. It is applicable to all types of Office Buildings, regardless of the nature of the businesses they house; including but not limited to, various commercial, medical, institutional, and life science uses. It can be used for single tenant, multi-tenant, or multi-building configurations, and is suitable for measuring new, existing, and proposed Office Buildings. This standard does not include the measurement of public sidewalks, surface parking, landscaping, drainage structures, or other site improvements. The primary purpose of this standard is to calculate Rentable Area, a crucial metric in office leasing. Nevertheless, it also provides area figures useful for space utilization analysis, valuation, benchmarking, and allocating building expenses across different cost centers.
BOMA 2025 for Industrial Buildings
Standard Method of Measurement (ANSI/BOMA Z65.2-2025)
BOMA 2025 for Industrial Buildings: Standard Method of Measurement (ANSI/BOMA Z65.2─2025) is the update to the 2019 Industrial Standard and includes many new features, enhancements, and clarifications. The Industrial Standard is intended exclusively for Industrial and Flex buildings and their associated structures and may be applied to single tenant, multi-tenant or multi-building configurations. It features a single method of measurement and generates multiple Load Factors for various shared space types. The end product is a spreadsheet called the Global Summary of Areas, which allocates shared space among occupants and calculates rentable area. Due to the sheer variety of architectural designs, space configurations, and business requirements found in today’s Industrial and Flex Buildings, this standard goes to great detail to cover as many real-world conditions as possible.
BOMA 2023 for Multi-Family and Hospitality Properties
Standard Methods of Measurement (ANSI/BOMA Z65.4-2023)
The BOMA 2023 Multi-Family and Hospitality Standard features a Gross Area Method of measurement and a Net Area Method of measurement, with the Net Area Method providing two distinct levels of measurement data, known as the Inside Net Method and the Centerline Net Method. Furthermore, this measurement standard accommodates a Partial Measurement or an Overall Measurement.
BOMA 2020 for Retail Properties
Standard Method of Measurement (ANSI/BOMA Z65.5-2020)
BOMA 2020 for Retail Properties: Standard Method of Measurement (ANSI/BOMA Z65.5-2020) is the update to the 2010 Retail Standard and is intended exclusively for Retail Properties and their associated structures and may be applied to single tenant, multi-tenant or multi-building configurations.
BOMA 2021 for Mixed-Use Properties
Standard Method of Measurement (ANSI/BOMA Z65.6-2021)
BOMA 2021 for Mixed-Use Properties: Standard Method of Measurement (ANSI/BOMA Z65.6-2021) is the update to the 2012 Mixed-Use Standard and is intended exclusively for Mixed-Use Properties and their associated structures. The standard is chiefly designed to generate Mixed-Use Common Area allocations on a proportionate basis according to the relative sizes of each Mixed-Use Component for integration with applicable single-use BOMA Standards. It also produces area figures which may be of interest to those examining space utilization, valuation, benchmarking and the allocation of building expenses to various cost centers.
BOMA 2024 Gross Areas
Standard Methods of Measurement (ANSI/BOMA Z65.3-2024)
The purpose of the Gross Areas Standard is to provide a comprehensive and consistent methodology for measuring all building types while presenting the data in various ways that are useful to the stakeholders of any given property. The BOMA 2024 Gross Areas Standard is a more comprehensive yet natural evolution of the previous editions, offering a categorized and systematic approach that provides users with an unlimited number of ways to dissect and analyze the areas of a building.
BOMA Floor Standards Interpretations Documents: Best Practice Guidance
Need additional best practice guidance on BOMA’s floor measurement standards? These official Interpretations provide further explanations of terminology and methodology.
BOMA Floor Standards Requests for Interpretation
Have a question about the proper interpretation of a BOMA floor measurement standard? The Interpretations Subcommittee of the BOMA International Floor Measurement Standards Committee will address written requests for interpretation.
BOMA Standards Education
BOMA International offers on-demand webinars and classroom instruction.
BOMA Standards Development Program
BOMA International develops floor measurement standards following the procedures approved by the American National Standards Institute (ANSI).
International Property Management Standards (IPMS)
BOMA International is a founding member of the International Property Measurement Standards Coalition (IPMSC)—an international group of professional and not-for-profit organizations who work together to develop and implement global standards for measuring real property. Through the adoption of the IPMS, property assets will be measured in a universal and consistent way, creating a more transparent marketplace, stronger investor confidence and increased market stability.
Building Class Definitions
The purpose of the rating system is to encourage standardization of discussion concerning office markets—including individual buildings—and to encourage the reporting of office market conditions that differentiate among the classes.