As a general rule, retaining walls are used to correct issues in hilly locations by holding back higher ground to produce a single holding drop in level, a stepping effect, or sometimes simply to reduce soil erosion.

In landscaping, when constructed correctly, retaining walls are successfully used to transform sloping gardens with unworkable, sometimes steep gradients into accessible and functional outdoor living space.

Retaining walls require careful planning and therefore should be assessed and constructed by professionals because a weak retaining wall could end up bulging or collapsing. Soil is heavy and even more so when wet and can place a lot of pressure on a retaining wall. Drainage also requires consideration and, in some locations, permission may need to be obtained from local authorities.

Materials used in the construction of retaining walls include natural stone, bricks, large timber (like railway sleepers) or poured and faced off concrete.

Retaining walls add property value and beauty to gardens with steep inclines.