Average Hourly Cost: The average cost for a lawn sprinkler system contractor to upgrade a sprinkler system is approximately $50 to $75 per hour.

Cost Breakdown: The cost of upgrading a sprinkler system will depend on the type and quality of the accessories used, the complexity of the job, and the location and service provider. Generally, the cost will include the cost of labor, materials, and any additional services.

Factors Affecting Cost: The type and quality of the accessories used, the complexity of the job, and the location and service provider are all factors that can affect the overall cost of the upgrade. For example, if the job is more complex, the cost may be higher due to the amount of time and labor needed. Additionally, the quality of the accessories used and the location of the service provider can also affect the cost.