Average Hourly Cost: The average cost of a lawn sprinkler system contractor for a sprinkler system winterization job is around $100 - $150 per hour in the United States.

Cost Breakdown: The cost of a sprinkler system winterization job will depend on the type and quality of the accessories used, the complexity of the job, and the location and service provider. For example, a basic winterization job may include draining the pipes, removing the sprinkler heads, and replacing the backflow preventer. This type of job may cost around $400 - $500. A more complex job may include additional components such as a new backflow preventer, valves, or a new controller. This type of job could cost around $800 - $1,000.

Factors That Affect Cost: The type and quality of the accessories used, the complexity of the job, and the location and service provider can all affect the cost of a sprinkler system winterization job. For instance, using higher quality accessories and components will usually cost more. Additionally, a more complex job may require more time and labor and thus cost more. The location and service provider can also affect the cost as some service providers may charge more due to their experience and reputation.