You can build a retaining wall from materials such as concrete, stone, wood, brick and blocks. Prices to build a wall range from about $15 per square foot for timber to $25 for natural stone, not counting design, according to "Engineering a Retaining Wall" by This Old House writer John Wagner.
Provide proper drainage for your wall. Consult experienced landscapers and builders about how and where to dig, material for backfill and landscape fabric. You can also enhance the appearance of your property with the construction of your retaining wall.
Design and build your retaining walls to bear heavy loads. Poorly constructed walls can lean, crack and fail. Choose your materials with care. Stone and brick walls last longer than timber, but are harder to build.