The Prairie Commons Branch has served the northwest area of St. Louis County since opening in 1986. Extensive renovations started in 2016 as part of Your Library Renewed. Upgrades included a colorful new children's area, inspired by nature with bright colors, organic shapes and several reading nooks. Two private study rooms were added to the branch, as well as a new computer lab, a quiet reading room, a laptop bar, a business center with fax, scanner and copy machines and a vending area. The branch and its community garden are both visible from Highway 270.