Princeton Riverside Real Estate Summary July August 7, 2017 by limey admin July 2017: 1 home sold in Riverside last month. The average days on market was 11. The average sold price for a home in the Riverside section of Princeton was $735,000. Click to see which homes sold in Princeton’s Riverside section or click to see Princeton Riverside homes for sale. *Source: TREND, information deemed reliable but not guaranteed.