Most Cincinnati homes pay $3,500 to $8,000 for a complete interior drainage and sump system. Single crack injection runs $400 to $1,500. Crawl space or basement encapsulation runs $3,000 to $9,000. Exterior excavation runs $8,000 to $15,000+. Free on-site quotes.
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Pricing depends on the solution your home actually needs, which is why a real quote requires an on-site assessment rather than a phone number. Interior perimeter drainage, the most common Cincinnati fix for hydrostatic clay-soil seepage, runs $3,500 to $8,000: the low end is a partial-perimeter system on one or two walls; the middle is a full-perimeter system (roughly 120 to 180 linear feet) with a wall drainage membrane, a quality sump, and a backup; the high end involves finished-wall removal and reset, a stone foundation needing extra membrane, a double sump for a large footprint, or a difficult discharge run. A sump pump install or replacement alone is $600 to $2,500 depending on the pump and whether you add battery or water-powered backup. Foundation crack injection is $400 to $1,500 per crack. Crawl space or basement encapsulation is $3,000 to $9,000. Exterior excavation and membrane, the dig-out solution, is $8,000 to $15,000 and up because of the excavation, lot access, and restoration of landscaping or hardscape. Watch for two pricing red flags from the storm-chaser crews common after a wet Cincinnati spring: a "starting at" price without an on-site assessment (the real number always comes in higher), and any quote far below these ranges, which usually means flexible corrugated tubing instead of rigid pipe, no wall membrane, an undersized pump, or a non-compliant sanitary-sewer discharge. The Cincinnati standard is a written, fixed-price quote good for 30 days, signed before any work begins, that names the pipe type, membrane, pump model, and discharge point.