Princeton Riverside Real Estate Summary September October 2, 2017 by limey admin September 2017: 2 homes sold in Riverside last month. The average days on market was 14. The average sold price for a home in the Riverside section of Princeton was $1,117,000. 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.