Pyramids_of_Egypt2 The great pyramid of Egypt. It is estimated that the pyramid took 10-14 years to build and required an average workforce of 14,500 people and a peak workforce of roughly 40,000. ©© The great pyramid of Egypt. It is estimated that the pyramid took 10-14 years to build and required an average workforce of 14,500 people and a peak workforce of roughly 40,000.