At about 1430 Eastern time, the airplane was substantially damaged when it landed short of the runway at the East Hampton Airport (HTO). The Commercial pilot/owner and passenger were not injured; visual conditions prevailed. According to the pilot, he was aiming to land on the numbers but, while on short final, the airplanes sink rate increased. The airplane landed a few feet short of the runway. Reported weather included winds from 180 degrees at six knots.