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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In both cases, total building rentable area remains the same as BOMA The standard uses a spreadsheet that performs these calculations from left to right so that it is easy to follow.

BOMA Standards

Drawing file containing the layout of a floor or a suite. This concept can also be used to allocate areas shared by multiple buildings previously known as Campus Area or Complex Common Area. Multiple changes that may be submitted collectively: Schedule B – Measurement Instructions.

The new concept ani Inter-Building Area allows service and amenity areas to be allocated specifically to the occupants that derive a benefit from the areas. Architectural plans for the property, typically prepared by architects, designers or land surveyors.


There is a Anei A and a Method B.

It provides a definitive procedure for measuring and classifying floor area in buildings for use in facility management, specifying occupant requirements, space planning, and for strategic facility planning. The government in Canada leases a great deal of office space.

Method B creates a single load factor or gross up for the entire building by means of two innovations. Generic Lease Documentation Package: Building Owners Management Association, organization which defines standards for measuring space.

It can be ordered by phone: Other standards are occasionally used. Method A is know as the “legacy” method. Landlords can choose to use one method or the other.

This is the circulation or corridor configuration that would be required in a bomaa multi-tenanted floor layout. The following is a presentation that we use to give an overview of BOMA standards for measuring office buildings:.

They have their own definitions for area that are published online here.

First, it uses nasi concept of “base building circulation”. It is not available online, but can be ordered by phone: Send us an email! Also, if a floor corridor configuration was changed, then the gross-up on that floor would change.

BOMA Standards Landing Page

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. This is a standard ahsi for facility management and should not be used for lease negotiations.


First the building is surveyed and drawn up on CAD. Create or Update the PDF file displaying an entire floor showing the layout, bomq numbers and rentable area for vacant suites. For more details, see below.

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. We use a colour coding system that helps you relate the areas on the drawings to the cells in the spreadsheet. The BOMA standard for measuring office buildings can be a bit confusing. The drawback is that this method relies on a concept of “imaginary circulation” that can be confusing.

It may not correspond to the actual circulation on any particular floor. The usable area in each suite is grossed up to arrive at the floor rentable area. Resources Home Services Resources.