I provided a detailed estimate for a trenchless sewer repair targeting a residential property's main sewer line. The estimate covered the costs of relining approximately 50 feet of damaged sewer pipe using a cured-in-place pipe (CIPP) method. This trenchless technique involves inserting a resin-saturated felt tube into the existing sewer line, which then hardens to form a new, seamless pipe within the old one, effectively repairing it without extensive excavation.