An installation agreement is a legal contract that outlines who pays for supplies and labor costs associated with a project. Contact Davis Business Law for experienced contract lawyers in Dallas.We draft non-compete, non-disclosures, and more. This contract is performable in Dallas County, Texas, and exclusive venue for any action under this contract shall lie in Dallas County, Texas. The Dallas BA offers standard form contracts to all of its builder members. New Home Contract (Completed Construction). In a fixed price contract, the builder and owner agree to a single, lump sum cost for completion of the construction. Remodeling your Dallas home? Here's an overview of contract types to help you decide which is best for your home.