Many people know that good fences make for good neighbors. Retaining walls are the same. Even though there are significant elevation differences, a good retaining wall can make adjacent properties safe and functional. A retaining wall can transform a site that is too steep for development and make it suitable for building, parking, or recreational areas.
A wall can also be used to create a parking area or turnaround area for a house, or a level area that is suitable for a patio/walkway. If you are looking for retaining wall constructors, then you can search the web.
A retaining wall, regardless of its size or appearance, rarely attracts attention until there is a problem. Wall problems can be more than cosmetic. They could indicate structural issues that could lead to the wall falling apart. Small wall problems should not be ignored.
Smaller walls often bow or tilt when the soil pressure on the top of the wall is too high for the wall's strength. Cracks in masonry walls are more likely to form where there is the highest soil pressure. Cracking in concrete masonry units (concrete blocks) is more common than cracking in bricks or CMUs (concrete mortar units).
In certain situations, a retaining wall that is damaged must be removed and rebuilt. You can't repair damage caused by rotting railroad ties in a wood wall. Many masonry-based walls can be "rescued," rather than being demolished if the damage is caused.