VERY close to home!
I was 15 when this movie was filmed. I knew nothing about it until a few years later when I saw it on TV. But ironically the filming took place RIGHT around the corner from my house! Clarendon Crescent is the street they used. My family and I lived on Clarendon Avenue. The "crescent" portion of Clarendon Ave is a very short dead end street. Check it out on Google maps. I think this house was right at the dead end.
The next bit of trivia was that our next door neighbor was director Harvey Hart (and his family). He had a son about my age. Mr Hart was hardly ever home, since he was directing a lot of TV episodes in California at the time. I recently saw a "Columbo" episode that he had directed.