For more than a century, BOMA has helped establish consistent methods for measuring buildings. These measurement standards support clear communication across the commercial real estate industry and provide commonly understood approaches to calculating areas such as rentable area, gross area, and shared-space allocations.
BOMA Standards are used by property owners, managers, brokers, appraisers, architects, space planners, and other real estate professionals to support leasing, valuation, benchmarking, expense allocation, and space-use analysis. The standards are developed and maintained by BOMA International and are available for purchase in print or digital formats through their website.
Below is an overview of the current BOMA measurement standards available.
Standard Methods of Measurement — ANSI/BOMA Z65.1-2024
Designed for office buildings and their associated structures, this standard supports the calculation of rentable area for single-tenant, multi-tenant, and multi-building office configurations. It is commonly used in office leasing, space analysis, valuation, benchmarking, and the allocation of building expenses.
Standard Method of Measurement — ANSI/BOMA Z65.2-2025
This standard applies to industrial and flex buildings, including single-tenant, multi-tenant, and multi-building properties. It provides a method for measuring industrial space, allocating shared areas, and calculating rentable area in a wide range of real-world industrial building configurations.
Standard Methods of Measurement — ANSI/BOMA Z65.4-2023
Intended for multi-family and hospitality properties, this standard includes both gross area and net area methods of measurement. It can be used to support consistent reporting and comparison of building areas across residential and hospitality property types.
Standard Method of Measurement — ANSI/BOMA Z65.5-2025
This standard is designed for retail properties and their associated structures. It focuses on creating a clear framework for measuring retail space, with particular emphasis on Gross Leasable Area and consistent communication among retail real estate stakeholders.
Standard Method of Measurement — ANSI/BOMA Z65.6-2021
This standard is intended for mixed-use properties and helps determine how shared mixed-use common areas are allocated among different property components. It is designed to work alongside applicable single-use BOMA standards or compatible non-BOMA methodologies.
Standard Methods of Measurement — ANSI/BOMA Z65.3-2024
The Gross Areas Standard provides a consistent methodology for measuring gross areas across building types. It helps users organize and analyze building area data for purposes such as leasing, construction, benchmarking, valuation, and alignment with international measurement approaches.
For more information on BOMA Standards programs, pricing, editions, interpretations, and official documentation, visit BOMA International’s BOMA Standards page.
