At first glance, yes, homeowners insurance covers retaining walls, as they are a detached structure on the property that should be covered for many different losses, such as fire, wind, and lightning. Detached structures are usually covered for 10 percent of your structure coverage.Click to see full answer. Similarly, you may ask, are seawalls covered by insurance?For the purposes of a homeowner’s insurance policy, a retaining wall is considered a detached structure and is therefore covered for a variety of losses, such as damage caused by fire, lightning, wind and vehicles. Therefore, if your home is covered for $100,000, your retaining wall is covered for $10,000.Furthermore, who is responsible for retaining wall failure? Sunshine Coast Council The maintenance of a retaining wall is the responsibility of the property owner whose land the retaining wall benefits. There may be circumstances where a retaining wall has been constructed on the boundary that retains fill on one property and cut on the neighbouring property. Also to know, how much will a retaining wall cost? The average cost of building a retaining wall is $5,371. Most homeowners find themselves spending between $3,201 and $8,387. The cost of retaining wall materials ranges from $3 to $40 per square foot. Wall block prices fall between $10 and $15 per square foot, while precase, poured concrete runs $20 to $25.Does insurance cover erosion?Most home insurance policies don’t cover damage to a home caused by soil erosion or earth movement even in cases when they provide optional foundation coverage.