Diy Retaining Wall Anchors . Signed and sealed drawings and calculations. Watch this video tutorial to learn how to build an anchor retaining wall system. Anchor Segmental Wall Systems Hardscapes Outlet from hardscapesoutlet.com $ 650 minimum or $0.45/ sq. December 4, 2021 january 4, 2022. Either screw or plate anchors can be used to stabilize basement or retaining walls.