A retaining wall can make a sloped yard more attractive and usable. It may create a level patio, support a garden, or separate a driveway from higher ground. During a home tour, it is easy to focus on the landscaping and overlook the wall itself. But retaining walls hold back soil, and their condition can affect safety, drainage, and future maintenance costs. What a Retaining Wall Actually Does Unlike a decorative garden border, a retaining wall resists pressure from the soil behind it. That pressure can increase when water collects in the ground. Depending on the wall's height, design, and…