As of today, , there are 176 properties for sale in the 23803 area and 270 properties listed for sale in the city of Petersburg. This single family residential home at 21512 Robertson Ave in ZIP code 23803 was last listed for $130,833. This is 7% above the current $121,900 median price for Petersburg and 15% above the median of $114,000 for the ZIP code. Of the 270 properties for sale in Petersburg, 263 are single family homes and 7 are condos. 21512 Robertson Ave is a single family residential home that is approximately 1,400 square feet, 7% below the city median of 1,512 and 3% below the 23803 ZIP code median of 1,447. The price per Sqft was $93 which is 18% above the current median price in 23803 of $79 and 18% above the Petersburg median of $79 per square foot.