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Help Center » GLA » What is the difference between Gross Internal Area and Gross Living Area

What is the difference between Gross Internal Area and Gross Living Area

Gross Internal Area (GIA) is the area of a building measured to the internal face of the perimeter walls at each floor level, it does NOT include the following areas:

  • terrace
  • balcony
  • deck
  • patio
  • porch
  • garage
  • veranda
  • conservatory
  • unfinished basement/ area

These areas are calculated and listed under ‘Excluded spaces:’, but not added to the total area.

External walls are NOT included in the total area. Interior walls are included in the total area.

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The Gross Living Area (GLA) is the total area of finished, above-grade residential space; calculation by measuring the outside perimeter of the structure and includes only finished, habitable, above-grade living space. External and internal walls are included.

Please note that the finished area in the basement is never considered to be GLA by the appraiser.

CubiCasa Digital GLA follows the ANSI Z765-2021 calculation standard.

Areas marked as green are calculated in the final GLA Area. Calculated green area value is shown as the area description next to the main green area in that level.

Areas marked with red are NOT calculated in the GLA Area. These areas also have the area description.

For more details about the GLA, please visit this article, our FAQ specific about the Gross Living Area – GLA, and this page.

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