Topsoil installation costs vary depending on the type and quality of the soil, the complexity of the job, and the location and service provider. Generally, a rock landscaping contractor will charge an hourly rate of around $75 per hour. This rate may vary depending on the complexity of the job, the type and quality of the soil, and the location and service provider. For example, if the job is complex and requires more time and skill, the hourly rate may be higher.

The cost of topsoil installation also depends on the type and quality of the soil. If the soil is of high quality, the cost may be higher. On the other hand, if the soil is of lower quality, the cost may be lower. The complexity of the job can also affect the cost, as more complex jobs may require more time and skill and thus may cost more.

The location and service provider can also affect the cost of topsoil installation. If the job is located in a remote area, the cost may be higher due to additional travel costs. Additionally, the cost may be higher if the service provider has a good reputation and a lot of experience in the field.

Overall, the cost of topsoil installation can vary depending on the type and quality of the soil, the complexity of the job, and the location and service provider. An average hourly rate of around $75 per hour can be expected, with additional costs depending on the specifics of the job.