*The Angi rating for Septic Tank Service companies in Cornwall, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Septic Tank Service needs.
*The HomeAdvisor rating for Septic Tank Service companies in Cornwall, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Septic Tank Service needs.
Last update on March 21, 2026
Serving Cornwall, CT and surrounding areas
Approved
Super Service Award Winner
In business since 2012
Free estimates
Emergency services offered
"seeded damaged lawn where septic tank was uncovered and applied straw to protect the new seed."
Serving Cornwall, CT and surrounding areas
Approved
Super Service Award Winner
In business since 2004
Free estimates
Warranties offered
"Steve is very knowledgeable and efficient on the installation of a new septic with pump. He cares about how he leaves the landscape when he is done and greatly improved how things were before. Not to mention the best price we received."
+97
Serving Cornwall, CT and surrounding areas
Approved
Super Service Award Winner
In business since 1995
Free estimates
Warranties offered
"John replaced our rental septic tank. The project was completed in 1 day & the site was left raked & seeded as promised. We highly recommend his work."
Serving Cornwall, CT and surrounding areas
Approved
In business since 1966
Free estimates
Emergency services offered
"While other companies spent years trying to figure out what was wrong with my system and after much money spent on â fixesâ , Eastern Water found a small piston dysfunction and the fix was simple and not expensive. I plan to switch to them for my routine maintenance. Additionally, they were responsive, efficient and reliable. The service person was very knowledgeable and explained everything to me."
+6
Serving Cornwall, CT and surrounding areas
Approved
In business since 2021
Free estimates
Credit card accepted
"Outstanding analysis and advice, timely service fairly priced, and outstanding workmanship--Who could ask for anything more from a Well Service company? Over the years I've spent nearly two decades in property management and maintenance, and in construction, and have seen the quality of workmanship decline. Mad River is a throwback to when craftsmen took pride in their work."
+11
Serving Cornwall, CT and surrounding areas
Approved
In business since 2001
Free estimates
Emergency services offered
"Ralph was excellent. He called within minutes of me submitting the Angies List request....... and came the very next day to fix our problem. He was pleasant, down to earth, honest and did the repair quickly, solidly, and for the money he’d estimated. Overall we were very very happy with our choice to go with Ralph!!"
Serving Cornwall, CT and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
"was very kind and professional got the job done very well and in a great time recommend to anyone"
Serving Cornwall, CT and surrounding areas
Approved
In business since 2025
Free estimates
Emergency services offered
Jonathan R. Habacker Plumbing and Heating LLC is a family owned and operated business. We are here because we enjoy providing plumbing services in the northwest corner of Connecticut to west Hartford. We like to treat our customers like family. You need family as much as you need plumbing. We are committed to keeping your home running smoothly and efficiently
Serving Cornwall, CT and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"My boiler stop working come to find out it was the gas valve and it need to be clean out. I love the experience I had with the company that was very transparent and open with the task step by step"
Serving Cornwall, CT and surrounding areas
Approved
In business since 1985
Free estimates
Credit card accepted
We take great pride in our experience, expertise, quality, and customer service that we provide to meet the \nconsumers needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start \nto completion of a project. In order to understand the needs and expectations of our customers, we take great care to \nwork and communicate with every customer in a professional manner. Our reputation is based on service, safety, and \nquality, regardless of how large or small the job
The cost to replace a septic tank is $7,350 for the average homeowner. This cost can range, however, from $470 to $22,500, depending on several factors. Your house size is a significant factor in the overall cost, but other things like material type impact the final price tag. For example, installing a new septic tank in a one-bedroom house typically costs $500 to $900, whereas installing a new septic tank in a five or six-bedroom home is generally $1,200 to $1,600.
Yes, most states require septic tank installers to have a license, and for good reason. Hiring an unlicensed septic tank pro could lead to poor quality work, costly future expenses, and potential code violations.
As you browse our pro listings, take note of the “Angi Approved” badge. Angi Approved businesses meet our standards for certification which include:
The owner, principal, or relevant manager passed a criminal background check
Required to have applicable state and local licenses
Maintain an average star rating of 3.0 or better on our network, if they have at least one review
Paying to advertise their services
Meeting any other eligibility criteria required by Angi
Keep in mind licensing is different from certifications. A license is a legal requirement to operate a business, while certifications are voluntary.
The cost of septic tank repair is $1,775 for the average homeowner. However, depending on a few elements, you might pay as little as $170 or as much as $6,100. Location, repair type, and tank material all determine the final cost. For example, replacing the septic tank filter can be as little as $200 to $300. However, repairing septic lines costs more, averaging around $1,500.
A septic tank can typically last 15 to 20 years on average, though your system's lifespan will vary depending on the type of septic system and the materials used. To help increase your septic tank's lifespan, schedule routine maintenance and do not flush items like cat litter, cigarette butts, or paper towels.
Repairing or replacing a septic tank is a job best left to a professional. Your septic tank is an essential part of your home, and if installed or repaired incorrectly, it could lead to significant problems. Things like polluted water, property damage, and health risks to your family could all happen as a result of an improper septic tank repair or installation.
From average costs to expert advice, get all the answers you need to get your job done.
A damaged septic system can leak odors and sewage, so repairs are urgent. Find out how much septic tank repair costs based on repair type, tank size, and more.
Septic tanks are kept underground, so checking the levels inside can be a challenge. Learn how to check if a septic tank is full with this guide.
Caring for your septic system properly can mean the difference between paying a few hundred dollars and paying thousands of dollars for a replacement.
Putting certain items down your drain causes clogs and reduces the natural bacteria in your tank. Follow this list of things not to put in a septic tank.
Want to learn how to build a septic tank for your rural or off-grid property? First, check your local laws, then dive into these general guidelines.
Septic tank sizes vary depending on the size of your home, how many people live there, how much water you use, and more. Read on to learn how to determine the right size for you.
