Wadsworth Inspections LLC, Wadsworth Excavation

Septic work in Plympton is governed by Title 5 (310 CMR 15.00) and permitted through the Plympton Board of Health, not the building department. A licensed installer pulls the disposal works construction permit, and the design is stamped by a registered sanitarian or professional engineer. Perc and deep-hole soil tests are witnessed by the Board of Health, and on Plympton's bog-laced terrain those tests frequently find a high seasonal water table. Work near wetlands, streams, or cranberry bogs commonly triggers Conservation Commission review under the Wetlands Protection Act. A Title 5 inspection is required before most property transfers.

Septic costs in Plympton sit near the South Shore norm, above western Massachusetts but below Boston-metro. A conventional system replacement typically runs roughly $20,000–$35,000, and where a high water table forces a raised or mounded system, costs land at the upper end. A Title 5 inspection runs a few hundred dollars up to about $1,000, and tank pumping is usually a few hundred. The seasonal high water table across Plympton's outwash and bog land is the defining cost driver here.

Massachusetts requires a written contract and a Home Improvement Contractor registration for most residential septic installation & service work; ask for the registration number and check it before paying a deposit.

More on permits, costs, rebates and common questions, plus every other septic installation & service contractor serving the town, on the Septic Services in Plympton page.