The number of bricks in the average house is dependent upon the size and thickness of the bricks, the size of the house and what percentage of the house is constructed of brick. One sample calculation based on averages of all the above factors results in about 5,226 bricks.
The average new home in the United States is just under 2,400 square feet. The dimensions of standard brick in the United States are 8 inches by 2.25 inches by 3 1/2 inches. If it is assumed that the entire exterior of a 2,400-square-foot house is brick, then it would take about 5,226 bricks in a single layer to cover 2,400 square feet of space.