BOMA (ANSI/BOMA Z) is also still used in some marketplaces; primarily in ultra-competitive, downtown core markets where landlords are. Landlords and owners must select one method and use it to measure the entire building – you cannot mix and match. ANSI/BOMA. Z 1st Ave. S Seattle, WA Measurements taken from record BOMA documentation and revised to comply with the release of the BOMA office.

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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.

We use a colour coding system that helps you relate the areas on the drawings to the cells in the spreadsheet. 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.

It sounds complicated, but it is quite rational and logical. 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.

For more details, see below. We had over attendees!

BOMA Standards – BOMA Canada

Vertical penetrations such as elevator shafts and stairwells are subtracted from the area of each floor. Resources Home Services Resources.


This article will help you understand the methodology behind different square footage calculations and the concepts to help you make better-informed leasing decisions. One could also say the building has a load factor of Landlords require tenants to pay for their proportionate share of common areas and therefore the monthly rent is calculated on RSF.

August 29, John Lister. It is clearly written and has several good illustrations. X65.1 A is know as the “legacy” method. While this might seem like a simple square-footage calculation, it is usually booma but. The following is a presentation that we use to give voma overview of BOMA standards for measuring office buildings:. Common areas are allocated on a floor by floor basis.

What makes it a bit odd as a standard is that it includes two completely different ways to allocate common areas in the building.

When evaluating office space options, tenants should compare load factors. What follows here is a very brief editorial overview:.

The drawback is that this method relies on a concept of “imaginary circulation” that can be confusing.

This is a standard used for facility management and should not be used for lease negotiations. Please consider our entire company as your support team!

BOMA Standards

Sign up to receive emails on our newsletter and upcoming events. When dealing with a large office lease—or if there is doubt concerning the accuracy of measurements provided by the landlord—tenants should consider having an architect take it one step further by field-measuring the space before they sign a lease. 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.


To understand the slight variations between the two methods and determine which might be most advantageous in a given situation, tenants should consult a tenant-representative broker or a licensed architect. First the building is surveyed and drawn up on CAD. The new concept of Inter-Building Area allows service and amenity areas to be allocated specifically to the occupants that derive a benefit from the areas.

Generic Lease Documentation Package: March 20 Budgeting Essentials Workshop. First, it uses the concept of “base building circulation”. Maddy Lines, a fearful organizer played by Vickie Banti.

It is still important because area numbers based on this standard are in use on leases today.