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What should I include in my GFA? Follow

The Gross Floor Area (GFA) is the total property square footage, as measured between the exterior walls of the building(s). This includes all finished areas inside the building(s) including supporting areas.


Include in GFA*:

  • Lobbies
  • Tenant Areas
  • Common Areas
  • Meeting Rooms
  • Break Rooms
  • Atriums (count the base level only)
  • Restrooms
  • Elevator Shafts
  • Stairwells
  • Mechanical Equipment Areas
  • Basements
  • Storage Rooms
  • Laundry Rooms

Do not include in GFA**:

  • Exterior spaces
  • Balconies
  • Patios
  • Exterior Loading Docks
  • Driveways
  • Covered Walkways
  • Outdoor Courts (Tennis, Basketball, etc.)
  • The interstitial plenum space between floors (which house pipes and ventilation)
  • Crawl Spaces/Attics
  • Parking
**Although you do not include these areas in your GFA, you do include the energy use associated with these areas.  Our algorithms assume buildings have outdoor usage, too. The GFA refers specifically to interior space.  But the energy use evaluated in our algorithms should be all energy required to operate your building, which includes the energy used both inside and out.


GFA is not the same as rentable space, but rather includes all area inside the building(s). Rentable, or leasable, space is a sub-set of GFA.

While you never include any Parking GFA in your Property GFA, you may need to enter your Parking GFA if you do not submeter  it. (See this FAQ for How to enter parking)

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