Improves property value: A good xeriscape can raise property values, offsetting the cost of installation. Depending on the size and location of the project, it can cost anywhere from $300-$2,500 to have a landscape designer create a detailed plan for your property.For simpler projects, it's also possible to get one to two hours of on-site verbal consultation for $50-$100 an hour.mproves property value: A good xeriscape can raise property values, offsetting the cost of installation. Depending on the size and location of the project, it can cost anywhere from $300-$2,500 to have a landscape designer create a detailed plan for your property.