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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A ratio between the total of all the floor rentable areas and the total area of the building including building common areas such as the lobby and mechanical spaces is calculated. This is blma standard used for facility management and should not be used for lease negotiations. What makes it a bit odd as a standard is that it includes two completely different ways to allocate common areas in the building.

The following is a presentation that we use to give an overview of BOMA standards for measuring office buildings:. What follows here is a very brief editorial overview:. The BOMA standard for measuring office buildings can be a bit confusing.

It is not available online, but can be ordered by voma It sounds complicated, but it is quite rational and logical. There are some significant changes which in most cases cause the building rentable areas to increase. Method A is know as the “legacy” method. Building Owners Management Association, organization which defines standards for measuring space.


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: First the building is surveyed and drawn up on CAD.

A ratio between the total asi of the floor and the total usable area within suites on the floor is calculated.

BOMA Standards

Multiple changes that may be submitted collectively: This concept can also be used to allocate areas shared by multiple buildings previously known as Campus Area or Complex Common Area. Support Team Please consider our entire company as your support team!

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. They have their own definitions for area that are published online here. The drawback is that this method relies on a concept of “imaginary circulation” that can be confusing.

There are two options available, Method A bma Method B. To make area calculation consistent and fair, standards need to be used.

BOMA Standards Landing Page

For more details, see below. We use a colour coding system that helps you relate the areas on the drawings to the cells in the spreadsheet. It is clearly written and has several good illustrations.

Landlords can choose to use one method or the other. Area is calculated in several steps: There is a standard, a standard and there are different methods for calculating office, store and industrial areas. It can be ordered by phone: Method B allocates the common areas in the building is a way that results in all the floors having the same gross-up factor.


The government in Canada leases a great deal of office space. Generic Lease Documentation Package: The snsi uses a spreadsheet that performs these calculations from left to right so that it is easy to follow. Schedule B – Measurement Instructions.

This is the circulation or corridor configuration that would be required in a typical multi-tenanted floor layout. Although it is not the only one, the dominant standard that defines how to measure and calculate area in commercial buildings is published by BOMA Building Owners and Managers Association.

In the standard, only the first 8 feet up from the finished floor is taken into consideration when determining the dominant portion. 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. Please consider our x65 company as your support team! snsi

There is a Method A and a Method B. Learn more about each standard.