Yes, you can put topsoil over sand to encourage grass growth. The topsoil will help to improve water retention and promote grass roots’ development, making it a recommended step of the seeding process. Adding a layer of topsoil will provide additional nutrients to the sandy soil, helping the grass grow and remain healthy through many seasons.

The soil around your foundation should slope down and away from your home, not toward it. If the grading drops the farther you are from your home, you can enhance the slope by removing more soil. Mark off a few feet from your house and dig up some of this soil. Regrading around your fountain should encourage water to flow away from your home and not collect or “pond.”

When planting, it's best to leave several feet between a house and a juniper bush. Many juniper varieties will become quite bushy and require space to grow. Juniper branches that come into contact with siding can damage the home's exterior over time. Also, some juniper bushes have aggressive roots that can put pressure on a home's foundation or basement walls. 

You should plant trees at least 15 to 20 feet away from your house, and more if the tree will grow large and spread its limbs. Trees pose several dangers to houses when planted too close. They can litter the roof with leaves and branches, create fire hazards, make a ladder for larger pests, and even damage the foundation as their roots grow.