The airplane contacted a building and two parked vehicles after takeoff. The pilot reported that everything during the preflight engine run up was normal. He reported he rotated the airplane at 80 knots during the takeoff and pitched 10 degrees nose up to achieve the best angle of climb. The pilot reported the initial climb to about 150 feet above the ground was normal, then the airplane hesitated and stopped climbing. He reported the airplane then climbed slowly for a couple of seconds prior to it starting a descent. The pilot reported the airspeed decreased, the stall warning sounded, and the airplane began to buffet. The pilot lowered the nose and made a slight right turn to avoid obstacles. He stated he wanted to bank further to the right, but there were two telephone poles along the flight path. He stated the right wing of the airplane struck a building mounted antenna as he reduced the engine power. The landing gear then contacted the roof of a building and two parked vehicles prior to impacting a parking lot. The pilot and passengers exited the airplane before it was destroyed by a post impact fire. The pilot reported, "In summary, there appeared to be a partial loss of power during the initial climb." Inspectors from the Federal Aviation Administration Flight Standards District Office in Detroit reported that an inspection of the engine failed to reveal any mechanical failure/malfunction.