You should file your mechanics lien with the County Recorder of Deeds. "Services"- The construction services, duties and responsibilities described in the Contract.The function of a contract is to reflect the intentions of the parties. The Contractor shall construct, complete, deliver and remedy defects in the Contract Works. Construction Contracts as defined in the Forest Preserve District Code of Cook County (Code) Section 1-8-. 2. "Services"- The construction services, duties and responsibilities described in the Contract. Construction projects operate on contracts. What is reasonable will depend on the facts and circumstances of each contract. Working with a contract attorney will ensure that your documents are legal, admissible in court, and are free of loopholes.