Duncan GrahamLicensed

Licensed septic contractor based in Dover, Strafford County, NH

"Based in" is the city and county of the address on the business's license record. That can be a mailing address; it doesn't tell you where the business works.

Get free quotes

What this license covers

• Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.

How to verify this license

We publish the license details exactly as they appear in the official licensing records of the agency that issued the license; we do not vouch for the business itself. Before hiring, look up license #05776 directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.

Source: NH DES - Septic System Designers & Installers, last checked 2026-08-16. Verify at the official source.

Compare licensed contractors based in Dover

Other septic contractors based in Dover

Other licensed septic contractors based in Strafford County

See every listing based in Strafford County or in Dover.