Princeton Riverside Real Estate Summary August 2018 September 10, 2018 by limey admin August 2018: 2 home sold in Riverside last month. The average days on market was 97. The average sold price for a home in the Riverside section of Princeton was $937,500. 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.