BOMA (ANSI/BOMA Z) is also still used in some marketplaces; primarily in ultra-competitive, downtown core markets where landlords are. BOMA International is providing the following guidance on the Standard Method for. Measuring Floor Area in Office Buildings, BOMA Z, for persons. Today, BOMA International is the secretariat of a suite of measurement standards : Office Buildings: Standard Methods of Measurement (ANSI/BOMA Z

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Also, if a floor corridor configuration was changed, then the gross-up on that floor would change. The Ansl standard for measuring office buildings can be a bit confusing.

BOMA Floor Measurement Standards-Overview

The drawback is that this method relies anso a concept of “imaginary circulation” that can be confusing. Architectural plans for the property, typically prepared by architects, designers or land surveyors. You can think of this as treating all the suites as though they were all on a single z56.

We colour-code and label the areas on the drawing: The government in Canada leases a great deal of office space. Learn more about each standard. It may not correspond to the actual circulation on any particular floor. This is the latest version of the Office measurement standard.

Please consider our entire company as your support team! For more details, see below. Schedule B – Measurement Instructions. Support Team Please consider our entire company as your support team! This is the circulation or corridor configuration that would be required in a typical multi-tenanted floor layout. The concept of dominant portion determines whether the area is measured to the glass line or inside wall face at windows along the exterior enclosure.


The standard uses a spreadsheet that performs these calculations from left to right so that it is easy to follow. It is still important because area numbers based on this standard are in use on leases today.

Although it is not the only one, the dominant ansl that defines how to measure and calculate area in commercial buildings is published by BOMA Building Owners and Managers Association.

Typically used for space planning, it does not contain tenant names or tenant area references. We are all here to help. Method B allocates the common areas in the building is a way that results in all the floors having the same gross-up factor.

Area is calculated in several steps: There are two options available, Method A and Method B. You can call 1 and dial 0 or email support spacedatabase.

There is a Method A and a Ansj B. Multiple changes that may be submitted collectively: We use a colour coding system that helps you relate the areas on the drawings to the cells in the spreadsheet. First the building is surveyed and drawn up on CAD. The usable area in each suite is grossed up to arrive at the floor rentable area.

These included i Option to include balconies and finished rooftop terraces in rentable area ii Major Vertical Penetrations at lowest level are included in rentable area. Proposed layout of office space within a suite, used to determine suitability for potential tenants.


There are some significant changes which in most cases cause the building rentable areas to increase. Floor plan containing an area summary showing the booma area information, suite numbers, tenant name and non-tenant spaces.

An example would be a mechanical room that services a specific group of occupants, or to allocate common areas in a more targeted way for floors with multiple cores. Common areas are allocated on a floor by floor basis. There are also so minor differences in how area lines are to be determined. It sounds complicated, but it is quite rational and logical.

First, it uses the concept of “base building circulation”. In both cases, total building rentable area remains the same as BOMA Portable Document Format, file format for used to represent documents in a platform independent manner.

BOMA Standards

We need agreed-upon definitions of where measurements should be taken to and how common or shared space should be allocated. Drawing bom containing the layout of a floor or a suite. Building Owners Management Association, organization which defines standards for measuring space. The usable area of each suite is calculated. Resources Home Services Resources.

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