It depends on tank size, soil, groundwater, and how hard the site is to reach, so we don't quote a number without seeing the property. Our two most recent tank replacements show how far apart two jobs can land. In September 2026, replacing a deteriorated 1,000-gallon concrete tank on Campground Road in Spartanburg cost $5,600, with two pump-outs billed separately at $550 and $400. On Country Club Road in Spartanburg in May 2026, replacing a 1950s concrete tank with a new polyethylene tank cost $4,200, with $800 for pumping on top. Water was seeping through the old walls at that property, which made the job more involved. Those are two properties, not a price list. If your soil needs an engineered system, expect it to cost about three to four times more than a conventional one. Taking an old tank out of service without replacing it is a different job, covered under septic tank decommissioning. We give a written quote after a site inspection. All figures here are the actual job prices as of October 1, 2026.