Call the Texas Natural Resource Conservation Commission: 512-239-3708
The State of Texas requires that all Irrigators be licensed. Their license number should be posted on their vehicle, business card, all advertising including yellow pages, bids, designs and contracts.
Most water authorities require permits and inspections on all new irrigation system installations. The irrigation contractor may also be required to register in each city before he/she is allowed to obtain permits or call for inspections.
A copy of the “As Built” design should be required of the contractor. This will benefit you when making changes in your landscape or for irrigation system repairs. A design is not required for bidding.
State law does not require a contract. However, a responsible contractor should have no problem with an agreement that outlines the scope of the work, price, payment arrangements, and warranty period.