If you asking if North Park is an old or young community as far as the demographics of the people, that question can not be answered without violating Fair Housing Laws.
However if you would like to know the general age of the homes, then the answer is old for California standards. I would say that the majority of the homes were built in the 1920's & 1930's. There are homes that are built earlier and some then some in the 40's & 50's.
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I hope this helps. Feel free to call me toll free if I can be of more service to you.
Have a great weekend.
Coldwell Banker Res. Brokerage
Full time Realtor since 1988