Download and fill out the application. Insuring Irrigation.Easily Create an Irrigation Contract for Your Customers. Download a free irrigation contract template to establish clear service terms with your clients. Hillsborough County offers commercial irrigation accounts for commercial project development. • Licensed landscape architects, engineers, general contractors, and the like. Hillsborough County does not have a minimum size guideline but there must be a viable commercial operation on the property with the expectation of a profit. A form of deed notice shall be submitted to the municipality for approval prior to filing. This file is a comprehensive contract template for performance-based irrigation management.