Average Hourly Cost: The average hourly cost for an outdoor fireplace and fire pit installation by a rock landscaping contractor is around $75-$95 per hour.

Cost Breakdown: The cost of an outdoor fireplace and fire pit installation can vary significantly depending on the type and quality of the accessory, the complexity of the job, and the location and service provider. Generally, the cost of the installation includes the cost of the materials, labor, and any additional services needed.

Factors Affecting Cost: The type and quality of the accessory can have a major impact on the cost of the installation. For example, natural stone fireplaces and fire pits are typically more expensive than those made from brick or concrete. The complexity of the job can also affect the cost, as more complex installations may require more labor or additional services. Finally, the location and service provider can also affect the cost, as some service providers may charge more depending on their experience and the area they are located in.