The pilot reported he entered a right downwind for the traffic pattern and he “touched down further down the runway than expected.” He decided not to perform an aborted landing as there was a tree at the departure end of the 3,481-foot long by 75-foot wide runway; however, he was unable to stop the airplane on the runway. The airplane subsequently continued past the runway end, across the road, and impacted a wood fence and a mobile home. During the impact, the left wing, the left aileron and the fuselage incurred substantial damage. The pilot rated passenger stated that the airplane appeared high and fast on final approach. A witness familiar with the airport stated that the airplane appeared to touchdown more than half way down the runway with both main tires trailing smoke due to heavy braking. Post accident examination by a Federal Aviation Administration inspector revealed the flaps were deployed to 20 degrees. Further inspection was performed on the flap system which was determined to be fully operational. No pre-impact malfunctions were reported.