2 Residential Energy American homes use almost 25% of the energy consumed in the United States. About 80% of that energy is used in single-family homes, 15% in multi-family homes (such as apartments and condos), and 5% in mobile homes. Residential energy use has steadily increased over the past 25 years, but has increased at a slower rate than the rate of population increase. Many efficiency gains are being offset by increases in the number of electronics and appliances in the average home. There are still many opportunities to reduce energy consumption in the home at low or no costs.