Share: Share on Facebook Share on Twitter Share on LinkedIn I recommend visiting to read:%0A%0A {0} %0A%0A {1}

Calculating the area of a property: do you know how it works?

Daniel Battistella • 10/28/2021
Learn the differences between the various metrics used to calculate the area of a property.

How is this calculation performed?
When a property is negotiated, be it commercial or residential, the first information the client wants to know is its area. There are several metrics in Brazil and in the world for this calculation. About five years ago, the most used in Brazil was the private area.

Today, most owners use the so-called Boma area, created by an industry entity in the United States to unify these measurements.

In addition to these, there are also:

• Total area
• Common area
• Useful area
• “Carpet” area (already recurring term in the corporate slab segment).

We'll look at how each of these metrics works in more detail below.

The important thing, as Daniel Battistella, director of Tenant Representation at Cushman & Wakefield, Daniel Battistella, points out, is to be aware of some points in terms of metrics to calculate the area of a property.

‘‘We need to know how to distinguish the metrics to calculate the exact space that the tenant or buyer will have to effectively structure their office and also to be able to calculate the “efficiency” of the slab and whether it is suitable for the profile of the new occupant. Another factor is that by understanding these variations, we are able to accurately measure the value per square meter being requested for the property under negotiation”.

Differences between each metric
We are going to explain in a simplified way, the differences between the metrics and what each one contemplates, with a focus on the Brazilian corporate market.

Boma area
It is the acronym for Building Owners and Managers Association. Today, it is the most used in negotiations in the corporate market, mainly by foreign companies that feel more secure in adopting American standards.

Briefly, the “Boma applied in Brazil” standard is the sum of all the private and common area of the property prorated proportionally to the occupants.

Common area
For this calculation, all other spaces that are outside the private area, which may or may not be freely accessible to unit owners, are considered. For example: halls, access, support and technical areas, among others. This calculation is done through apportionment.

In the case of corporate projects where parking spaces are not demarcated, they are not included in this calculation.

Private area
These are areas considered for the exclusive use of the owner or occupant. What we call the “door in”. Balconies and technical areas for air conditioning, for example, only enter into the composition of this calculation when they are inside the private area.

Private warehouses are also included, as are wall and pillar areas. Garage areas, on the other hand, as they are indeterminate in corporate buildings, do not fit into this metric.

Useful area
In most cases, it will be equal to or smaller than the private area because it excludes from the calculation some items such as balconies, projection of the areas of walls and pillars. It is also known as the “broom area”. In this case, it is important to pay attention when negotiating a property, as the usable area gives a more accurate notion of the internal space than the private area.

"Carpet" area
It is based on the useful area of the property, but subtracts the so-called “wet area” (which includes bathrooms, pantry, kitchen) and storage, if any. It is widely used in slab negotiations because it can calculate the efficiency of the office for the accommodation of furniture and employees.

Attention to the details!
As we've described, there are many details that must be evaluated and analyzed to compose a property's area metrics. In addition, it is necessary to know the building project in detail, as architectural and construction characteristics influence this result.

"Hence the importance of the future tenant or buyer always relying on the advice of specialized companies, which provide professionals with expertise to clarify, clear up doubts and effectively help the client to carry out the business that is more in line with their needs and with the best cost-benefit ratio" , comments Daniel Battistella.

Featured Insights

Article • Sustainability / ESG

How can Life Cycle Analysis (LCA) help projects seeking LEED certification and ESG strategies?

Life Cycle Assessment (LCA) is used as a design tool to understand environmental impacts related to materials and transportation, maintenance and end-of-life.

Matheus Cardoso • 12/5/2023
Colocation Data Center
Article • Technology

Colocation: concepts and benefits of collocating shared data center spaces

Colocation or housing are nothing more than shared data centers. In this type of service, the operator rents spaces to several companies, this includes all the necessary infrastructure for the operation of the data center, such as energy, cooling equipment, internet access, security and others.



Get in touch with one of our professionals.
With your permission we and our partners would like to use cookies in order to access and record information and process personal data, such as unique identifiers and standard information sent by a device to ensure our website performs as expected, to develop and improve our products, and for advertising and insight purposes.

Alternatively click on More Options and select your preferences before providing or refusing consent. Some processing of your personal data may not require your consent, but you have a right to object to such processing.

You can change your preferences at any time by returning to this site or clicking on Privacy & Cookies.
These cookies ensure that our website performs as expected,for example website traffic load is balanced across our servers to prevent our website from crashing during particularly high usage.
These cookies allow our website to remember choices you make (such as your user name, language or the region you are in) and provide enhanced features. These cookies do not gather any information about you that could be used for advertising or remember where you have been on the internet.
These cookies allow us to work with our marketing partners to understand which ads or links you have clicked on before arriving on our website or to help us make our advertising more relevant to you.
Agree All
Reject All