Commercial Buildings Energy Consumption
"Although no one building type dominates the commercial buildings sector, office buildings are the most common and account for more than 800,000 buildings or 17 percent of total commercial buildings. Offices comprised more than 12 billion square feet of floorspace, 17 percent of total commercial floorspace, the most of any building type.

Types of Office Buildings

The 2003 CBECS Detailed Tables present data for office buildings along with other principal building activities (see Detailed Tables B13 and B14, for example). Since office buildings comprise a wide range of office-related activities, survey respondents were presented with a follow-up list of specific office types to choose from. Although we have not presented the office sub-category information in the detailed tables we make information about the sub-categories available in the 2003 Public Use Micro-Data files. Several of the sub-category choices presented to respondents were reported too few times to produce statistically reliable estimates and were aggregated with the “other type of office” category..."