I took a look at old Seattle Times papers for information on Pinehurst. There was a Pinehurst community that was a suburb of Everett in the beginning of the 20th century, but in 1927 realtor Geo. A. Spencer & Co. advertised tracts for sale in our area:
“Pinehurst for Profit” – Pinehurst located on 15th Northeast just one-half mile this side of the New Golf Links. Large tracts, $350 and up. Very easy terms. See this soon. Office on ground. Call KEnwood 3719-R-1 and car will be sent for you.
“Pinehurst” – large tracts north of city on 15th NE adjoining Victory Heights.
In 1935 the Pinehurst Community Club was formed. The club had meetings twice a month, with refreshments, and sometimes speakers, sometimes business meetings, and occasionally a movie. They had card parties, potlucks, an annual Christmas party for the kids, and during WWII did various patriotic activities. Once a year they held membership drives. One year they chose members via a contest. Many meetings were in members’ homes. A clubhouse was built at 14th & 123rd.
The club also joined with other North End communities in the North District Council. At this time the North End was outside Seattle city limits. In the 30s concerns were fire protection, street oiling and widening, and sewage. Pinehurst CC was on record opposing North End sewers for some reason.
They started talking about annexation to Seattle in 1939 and were having annexation planning meetings in 1952. According to Wikipedia, Pinehurst was annexed in 1953.