Food service buildings including restaurants are nearly four times more energy intensive than commercial buildings are on average in the United States. Food service buildings were the smallest commercial building type, averaging 4,800 square feet per building, or less than one-third the size of the average commercial building (16,300 square feet), according to our recently published 2018 Commercial Buildings Energy Consumption Survey (CBECS). Despite the small footprint, they used 263 thousand British thermal units per square foot (MBtu/sf) on average, compared to (70 MBtu/sf) for the average commercial building. We calculate energy intensity for each building type by dividing the total consumption of major fuels (electricity, natural gas, fuel oil, and district heat) by the total floorspace.