In his book, Psychedelic Bubble Gum - Boyce & Hart, The Monkees, and Turning Mayhem Into Miracles, Bobby Hart recalls moving into a new home and discovering that Harry Nilsson is his neighbor.

 

[...] I traded in my bachelor pad and we moved up to a much larger home on Pyramid Drive, only blocks away in the Hollywood Hills. Renting the modern architectural structure with seven levels that opened under one giant ceiling would give us time to find that perfect house to buy where Claudia and I could create our new domestic lifestyle. Soon after moving in, we found out that our next door neighbor was Harry Nilsson.
I often worked in the afternoons in my music room which was situated up on the top floor of seven levels. Perched above our property was a street cul-de-sac where three or four young neighbor kids liked to hang out after school. [...] One day as I was slaving over a hot piano, I heard one of the rude little kids yell [...], "Hey Mister, why don't you play us another one of your stupid songs!"
Well, it was only a matter of a few days later when Micky Dolenz stopped by to visit his good friend, Harry Nilsson, next door. The Cul-de-sac Kids got very excited when they looked down and spotted Micky getting out of his car in Harry's driveway. They began chanting at the top of their lungs, "Hey, hey, we're The Monkees ..." I listened for a few minutes with a smile on my face. They had no idea that my greatest revenge was hearing the kids' joyous rendition of "another one of my stupid songs."

 

Note: According to several sources, Harry once lived at 7708 Woodrow Wilson Drive which is not close to Pyramid Drive. If Hart's recollection is correct, it's possible that Nilsson's home was actually in the 7300 or 7400 block on Woodrow Wilson or that Harry had lived or stayed in a home in the Pyramid Drive area before moving to the 7708 Woodrow Wilson home.