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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The standard uses a spreadsheet that performs these calculations from left to right so that it is easy to 11. The following is a presentation that we use to give an overview of BOMA standards for measuring office buildings:.

The benefit of Method B is that it allows landlords to apply a single load factor ratio to all of the space in the building. Method B creates a single load factor or gross up for the entire building by means of two innovations. It sounds complicated, but it is quite rational and logical.

You can think of this as treating all the suites as though they were all on a single floor. The Andi standard for measuring office buildings can be a bit confusing.

First the building is surveyed and drawn up on CAD. Area is calculated in several steps: Users can choose one of the two dominant market practices observed in North America – the Exterior Wall Methodology or the Drip Line Methodology – depending on their specific building configuration.

There is a Method A and a Method B. It is still important because area numbers based on this standard are in use on leases today. 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. Floor plan containing an area summary showing the certified area information, suite numbers, tenant name and non-tenant spaces.


In both cases, total building rentable area remains the same as BOMA Greater Washington Commercial Association of Realtors. The BOMA standard is designed so that a landlord is able to charge rent for all the area in a building.

BOMA Standards

To find out more about how we can help you, call or email us: Typically used for space planning, it does not contain tenant names or tenant area references. A ratio between the total area of the floor and the total usable area within suites on the floor is calculated. This is the successor to BOMA Usable space, common areas and vertical penetrations are delineated according to specific rules.

We need agreed-upon definitions of where measurements should be taken to and how common or shared space should be allocated.

Drawing file containing the layout of a floor or a suite. Proposed layout of office space within a suite, used to determine suitability for potential tenants. Also, if a floor corridor configuration was changed, then the gross-up on that floor would change.

Building Owners Management Association, organization which defines standards for measuring space. The main difference between the and standards is that the version includes a method to proportionally allocate building common areas as well as floor common areas to suite rentable areas.

BOMA Floor Measurement Standards-Overview

This is done by grossing up the usable area that a tenant has inside their suite by a factor that accounts for a proportionate share of the spaces that the tenant shares with other tenants: The next innovation is to then gross up all the useable space in the building equally. This concept can also be used to allocate areas shared by bom buildings previously known as Campus Area or Complex Common Area. Common areas are allocated on a floor by floor basis.


The concept of dominant portion determines anai the area is measured to the glass line or inside wall face at windows along the exterior enclosure. Landlords can choose to use one method or the other. It is not available online, but can be ordered by phone: They have their own definitions for area that are published online here. Architectural plans for the property, typically prepared by architects, designers or land surveyors.

There are also so minor differences in how area lines are to be determined. Send us an email! This is the circulation or corridor configuration that would be required in a typical multi-tenanted floor layout. We colour-code and label the areas on the drawing: In the standard, only the first 8 feet up from the finished floor is taken into consideration when determining the dominant portion.

It may not correspond to the actual circulation on any particular floor. There are some significant changes which in most cases cause the building rentable areas to increase.