GroundRosterSeptic System Installation: Licensed Septic Installers Based in Grantham, NH
6 of the 7 licensed listings based in Grantham hold a license class that covers this work: they are licensed to build and install septic tanks and drainfields, and repair or replace failed ones. Not every well and septic professional is; see all Grantham listings for the full roster.
People also call this septic tank installation, septic system replacement or drainfield repair. It is the same work, done under the same license class.
"Based in" is the city on the business's license record. That can be a mailing address; it doesn't tell you where the business works.
Brian HastingsLicensed
Chris GallienLicensed
Adam HowardLicensed
Jeremiah StearnsLicensed
Michael HastingsLicensed
Brian StearnsLicensed
Looking for a specific contractor? Search by name, business name, or license number.
What does septic system installation cost?
A conventional septic system typically costs $3,600 to $12,500 installed. Alternative systems (aerobic, mound) for difficult sites run $10,000 to $20,000. Soil conditions drive most of the difference, which is why a soil or percolation test comes first.
Those are national ranges. The Septic System Installation cost guide explains what moves the price, and local quotes set the real number.
Do I need a permit to install or replace a septic system?
Almost always. Your state or county health authority must permit new systems and most repairs, and the design has to match a soil evaluation of your site. Licensed installers usually handle permitting as part of the job; confirm it is included in the quote.
Before you hire
Before you sign anything: confirm the license on this page is still active with the agency that issued it, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.
Do I need a permit for well or septic work in New Hampshire?
Related guides: 7 Signs Your Drain Field Is Failing · Aerobic Septic Systems: How They Work, What They Cost, and What They Need · How to Choose a Septic Company: 9 Checks Before You Sign
Need someone in another town? The New Hampshire page lists licensed contractors across the state by county and city.