The answer to 'how much does flat roof cost in Illinois' is that the cost of a flat roof can vary widely depending on several factors. Typically, the cost of a flat roof in Illinois can range from $10 to $30 per square foot, installed. The exact cost will depend on the size of the roof, the materials used, the complexity of the project, and the location within Illinois.
Factors that can influence the cost of a flat roof include the type of roofing material (such as EPDM, TPO, or PVC), the condition of the existing roof, the accessibility of the property, and the contractor's labor and overhead costs. Additionally, the cost can vary based on the region within Illinois, with prices generally higher in urban areas compared to rural areas.