As of today, , there are 129 properties for sale in the 91789 area and 119 properties listed for sale in the city of Walnut. This single family residential home at 705 Colusa Dr in ZIP code 91789 was last listed for $0. This is 100% below the current $928,000 median price for Walnut and 100% below the median of $910,000 for the ZIP code. Of the 119 properties for sale in Walnut, 116 are single family homes and 3 are condos. 705 Colusa Dr is a single family residential home that is approximately — square feet, 100% below the city median of 2,459 and 100% below the 91789 ZIP code median of 2,418. The price per Sqft was — which is 100% below the current median price in 91789 of $400 and 100% below the Walnut median of $407 per square foot.