Top-rated septic tank pros.

Get matched with top septic tank pros in Cos Cob, CT

There are 9 highly-rated local septic tank pros.

Need a pro for your septic tank service project in Cos Cob, CT?

Select your specific project to find the pro for you.

TRUSTED BY COS COB, CT HOMEOWNERS

Average homeowner rating star icon4.8
Average homeowner rating
Verified reviews icon153
Verified septic tank services reviews

Septic tank pros in Cos Cob

Avatar for Drain Away Sewer Service Inc
Drain Away Sewer Service Inc
P.O. Box 3065
4.82(
38
)
Approved Pro
Drain Away Sewer Service Inc
P.O. Box 3065
4.82(
38
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
11 local quotes requested

At Drain Away Sewer Service, Inc., we put our customers needs first! We offer a range of drain services and we know that our customer's are the backbone of our success. Response times are quick through our 24-hour emergency service and we pride ourselves on providing competitive, up-front costs. Whether you take advantage of our maintenance and service contracts for savings, or you use us for one-time emergency services, Drain Away Sewer Service, Inc. will deliver on professional, reliable and quality work. Drain Away Sewer Service, Inc. provides both residential and commercial drain cleaning services 24 hours a day, 7 days a week and 365 days per year. Offering over 10 years of experience in the drain cleaning business, our qualified staff is prepared to handle everything from a clogged toilet to main sewer services. We are centrally located to service both Westchester and Fairfield Counties.

"Richard from Drain Away service came out the next day and fixed the clogged drain. He was also very helpful with getting Servpro out to do clean up. Richard provided full and efficient services. Very pleasant and reasonably priced. I would definitely recommend Drain Away for any plumbing issues and would use them again if needed."

Paula A on February 2025

At Drain Away Sewer Service, Inc., we put our customers needs first! We offer a range of drain services and we know that our customer's are the backbone of our success. Response times are quick through our 24-hour emergency service and we pride ourselves on providing competitive, up-front costs. Whether you take advantage of our maintenance and service contracts for savings, or you use us for one-time emergency services, Drain Away Sewer Service, Inc. will deliver on professional, reliable and quality work. Drain Away Sewer Service, Inc. provides both residential and commercial drain cleaning services 24 hours a day, 7 days a week and 365 days per year. Offering over 10 years of experience in the drain cleaning business, our qualified staff is prepared to handle everything from a clogged toilet to main sewer services. We are centrally located to service both Westchester and Fairfield Counties.

"Richard from Drain Away service came out the next day and fixed the clogged drain. He was also very helpful with getting Servpro out to do clean up. Richard provided full and efficient services. Very pleasant and reasonably priced. I would definitely recommend Drain Away for any plumbing issues and would use them again if needed."

Paula A on February 2025


Avatar for All Star Rooter LLC
All Star Rooter LLC
9 Shadow Ln
4.71(
24
)
Approved Pro
All Star Rooter LLC
9 Shadow Ln
4.71(
24
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
26 local quotes requested

***WE DO NOT OFFER INSTALLATION OR REPLACEMENT OF SEWER LINES*** ***WE SPECIALIZE IN CLEANING AND CLEARING OF SEWERS AND DRAINS*** All Star Rooter offers dependable sewer and drain cleaning services to Fairfield and New Haven County, CT and the surrounding area. With over 30 years of experience, we provide the best possible service to ensure that your drains and sewer stay in proper working order at affordable prices. Our services include professional sewer and drain cleaning, video inspections, water jetting, and clearing of leader lines. There are many factors that cause sewers and drains to backup. Our video inspection service will find out exactly what we are dealing with. Also, our water jetting system will remove most problems with your drain lines or sewer lines. We proudly serve all of Fairfield and New Haven Counties, including Greenwich, Norwalk, Danbury, Stamford, Bridgeport, New Haven, Ansonia, Orange, Milford and the surrounding communities.Plumber. 15 years of experience.

"Awesome job! Very happy"

Monalisa H on July 2025

***WE DO NOT OFFER INSTALLATION OR REPLACEMENT OF SEWER LINES*** ***WE SPECIALIZE IN CLEANING AND CLEARING OF SEWERS AND DRAINS*** All Star Rooter offers dependable sewer and drain cleaning services to Fairfield and New Haven County, CT and the surrounding area. With over 30 years of experience, we provide the best possible service to ensure that your drains and sewer stay in proper working order at affordable prices. Our services include professional sewer and drain cleaning, video inspections, water jetting, and clearing of leader lines. There are many factors that cause sewers and drains to backup. Our video inspection service will find out exactly what we are dealing with. Also, our water jetting system will remove most problems with your drain lines or sewer lines. We proudly serve all of Fairfield and New Haven Counties, including Greenwich, Norwalk, Danbury, Stamford, Bridgeport, New Haven, Ansonia, Orange, Milford and the surrounding communities.Plumber. 15 years of experience.

"Awesome job! Very happy"

Monalisa H on July 2025


Avatar for Atomic Rooter Inc
Atomic Rooter Inc
2 Prospect Ave
4.65(
110
)
Approved Pro
Atomic Rooter Inc
2 Prospect Ave
4.65(
110
)
Approved Pro
Customers say: Quick response
22 local quotes requested
48 years of experience

For over thirty years we've made every effort to ensure our customer's satisfaction. From our conception we've adhered to traditional values, integrity being first and foremost. Perhaps the best fruit of our efforts is that over 75% of new business now stems from referrals. We understand the importance of good customer service and pledge to serve our customers with respect and professionalism. We would very-much like your business, but know full-well we must earn it. Atomic Rooter, Inc. is family owned and operated. We welcome your calls. Should you have any questions or require service, please do drop us a line.

"Steven was the absolute best… arrived at the very start of only a two hour window, fixed the problem in about an hour. Very polite and courteous. I called three plumbers and he was the first to call me back and the only one who would give me a ballpark figure over the phone. The others wanted to come out and have a look for $70. even though I accurately described the job in detail. I’m thrilled to have a reliable plumber! A more than satisfied customer, Lora Harrigan"

Lora H on July 2024

For over thirty years we've made every effort to ensure our customer's satisfaction. From our conception we've adhered to traditional values, integrity being first and foremost. Perhaps the best fruit of our efforts is that over 75% of new business now stems from referrals. We understand the importance of good customer service and pledge to serve our customers with respect and professionalism. We would very-much like your business, but know full-well we must earn it. Atomic Rooter, Inc. is family owned and operated. We welcome your calls. Should you have any questions or require service, please do drop us a line.

"Steven was the absolute best… arrived at the very start of only a two hour window, fixed the problem in about an hour. Very polite and courteous. I called three plumbers and he was the first to call me back and the only one who would give me a ballpark figure over the phone. The others wanted to come out and have a look for $70. even though I accurately described the job in detail. I’m thrilled to have a reliable plumber! A more than satisfied customer, Lora Harrigan"

Lora H on July 2024


Avatar for Roto-Rooter Plumbing & Water Cleanup
Roto-Rooter Plumbing & Water Cleanup
255 Stagg St
4.14(
171
)
Approved Pro
Roto-Rooter Plumbing & Water Cleanup
255 Stagg St
4.14(
171
)
Approved Pro
Customers say: Quick response
346 local quotes requested
90 years of experience

When you need an emergency plumber or a drain cleaner, call Roto-Rooter Plumbing & Water Cleanup. Your fast & reliable plumber can fix any plumbing problem, including sump pumps, toilet repair, faucet repair, faucet replacement, garbage disposals, water heaters, bathtubs, showers, and outside faucets. Roto-Rooter is best known for drain cleaning & sewer cleaning. We fix drain clogs, clogged toilets or sinks, blockage of main sewer lines, slow draining shower and bathtub drains, sewer lines and leaking or burst pipes. We also specialize in water damage restoration & water cleanup services. We can fix and clean up your flooded basement too. Roto-Rooter is a 24-hour plumber near you and provides emergency service.

"They were a day late"

Tina D on August 2025

When you need an emergency plumber or a drain cleaner, call Roto-Rooter Plumbing & Water Cleanup. Your fast & reliable plumber can fix any plumbing problem, including sump pumps, toilet repair, faucet repair, faucet replacement, garbage disposals, water heaters, bathtubs, showers, and outside faucets. Roto-Rooter is best known for drain cleaning & sewer cleaning. We fix drain clogs, clogged toilets or sinks, blockage of main sewer lines, slow draining shower and bathtub drains, sewer lines and leaking or burst pipes. We also specialize in water damage restoration & water cleanup services. We can fix and clean up your flooded basement too. Roto-Rooter is a 24-hour plumber near you and provides emergency service.

"They were a day late"

Tina D on August 2025


Avatar for L.C. Schede & Sons, Inc.
L.C. Schede & Sons, Inc.
130 Lenox Avenue, Unit 3
4.40(
248
)
Approved Pro
L.C. Schede & Sons, Inc.
130 Lenox Avenue, Unit 3
4.40(
248
)
Approved Pro
Customers say: True professional
53 local quotes requested
103 years of experience

For more than 78 years, we have been providing superior residential plumbing. We do comprehensive work -- and deliver great customer service. Our reputation in Fairfield County is second to none.

"Hired this company to replace two water heaters in my rental. Contractor responded quickly and got job done within few days from initial contact. Highly recommend."

Alex T on March 2025

For more than 78 years, we have been providing superior residential plumbing. We do comprehensive work -- and deliver great customer service. Our reputation in Fairfield County is second to none.

"Hired this company to replace two water heaters in my rental. Contractor responded quickly and got job done within few days from initial contact. Highly recommend."

Alex T on March 2025


Avatar for Eastern Water Development Co.
Eastern Water Development Co.
5 Benson Road
4.76(
52
)
Approved Pro
Eastern Water Development Co.
5 Benson Road
4.76(
52
)
Approved Pro
Customers say: Quality work
19 local quotes requested
59 years of experience

We have been in business since 1966 and have proudly served our community with an unparalleled range of water services. From the installation and maintenance of pump systems to the tap water you drink in your home, we have the expertise and services you need.As a full service water treatment company, we work with residential and commercial applications, providing only the best in water conditioning, treatment, filtration and more. Our certified professionals have years of experience in practicing only the safest and most efficient processes of water treatment.We have helped dozens of customers for over three decades and continue to do so. Our emergency services allow us to tend all of your water maintenance issues, whenever they may occur. The value and appreciation we have for our company is reflected in the work we do in our community.

"Great and quick service"

Kash R on October 2021

We have been in business since 1966 and have proudly served our community with an unparalleled range of water services. From the installation and maintenance of pump systems to the tap water you drink in your home, we have the expertise and services you need.As a full service water treatment company, we work with residential and commercial applications, providing only the best in water conditioning, treatment, filtration and more. Our certified professionals have years of experience in practicing only the safest and most efficient processes of water treatment.We have helped dozens of customers for over three decades and continue to do so. Our emergency services allow us to tend all of your water maintenance issues, whenever they may occur. The value and appreciation we have for our company is reflected in the work we do in our community.

"Great and quick service"

Kash R on October 2021


John H. Bensavage, LLC
53 Dale Ave.
4.96(
88
)
Approved Pro
John H. Bensavage, LLC
53 Dale Ave.
4.96(
88
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
40 local quotes requested

John H. Bensavage Septic, LLC, is a locally owned and operated septic cleaning company. We value honesty and integrity in all aspects of our business and offer a variety of services that are customizable to each individual project. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

"John Bensavage and his crew did an excellent job replacing our septic system. Would highly recommend this company. They left the yard looking better than when they started. Very professional. "

Nancy C on August 2025

John H. Bensavage Septic, LLC, is a locally owned and operated septic cleaning company. We value honesty and integrity in all aspects of our business and offer a variety of services that are customizable to each individual project. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

"John Bensavage and his crew did an excellent job replacing our septic system. Would highly recommend this company. They left the yard looking better than when they started. Very professional. "

Nancy C on August 2025


Avatar for E. Garrity Water Solutions, LLC
E. Garrity Water Solutions, LLC
262 New Milford Turnpike
4.88(
42
)
Approved Pro
E. Garrity Water Solutions, LLC
262 New Milford Turnpike
4.88(
42
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
35 local quotes requested

At E. Garrity Water Solutions we focus on quality water improvements over quantity. We use our years of experience and expertise to complete your project with perfection. Customer service and honesty are the most important aspects of our business, and your satisfaction is guaranteed. Please call us today for an estimate. We look forward to working with you.

"For weeks, we were getting less and less water from our faucets. Finally, we were down to a dispiriting trickle. A first visit from Garrity did not resolve the issue. When, concerned, I called back several days later, they immediately dispatched Joe and Cody, who arrived w/n 15 min. They probed deeply to find out the cause, discovering a cracked pipe and failing well pump, dating from about 30 years ago. They installed a new pump and new well cap up to current code and ensured that the water coming from the well was bacteria-free. This am, Joe was back by 8 am to show us how to flush all chlorine residues from our system and explain what he had done. Joe was determined, undaunted and kept at it until he found the cause of the inadequate water pressure--despite the late evening hour yesterday. His explanations were informative, clear every step of the way and helped us understand what was going on. He was patient, amiable and very good at what he does. Thank you Joe, Cody and Garrity!"

Juliane B on June 2024

At E. Garrity Water Solutions we focus on quality water improvements over quantity. We use our years of experience and expertise to complete your project with perfection. Customer service and honesty are the most important aspects of our business, and your satisfaction is guaranteed. Please call us today for an estimate. We look forward to working with you.

"For weeks, we were getting less and less water from our faucets. Finally, we were down to a dispiriting trickle. A first visit from Garrity did not resolve the issue. When, concerned, I called back several days later, they immediately dispatched Joe and Cody, who arrived w/n 15 min. They probed deeply to find out the cause, discovering a cracked pipe and failing well pump, dating from about 30 years ago. They installed a new pump and new well cap up to current code and ensured that the water coming from the well was bacteria-free. This am, Joe was back by 8 am to show us how to flush all chlorine residues from our system and explain what he had done. Joe was determined, undaunted and kept at it until he found the cause of the inadequate water pressure--despite the late evening hour yesterday. His explanations were informative, clear every step of the way and helped us understand what was going on. He was patient, amiable and very good at what he does. Thank you Joe, Cody and Garrity!"

Juliane B on June 2024


Avatar for CT Radon & Well Water Solutions
CT Radon & Well Water Solutions
80 Birchwood Rd
4.79(
70
)
Approved Pro
CT Radon & Well Water Solutions
80 Birchwood Rd
4.79(
70
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
79 local quotes requested

Our team has over 90 years of combined experience providing reliable radon mitigation, water filtration, and well pump services and solutions to the Fairfield, New Haven, Hartford and Litchfield Counties of CT. Want to create a healthier and safer home environment? Call CT Radon and Well Water Solutions to schedule a no-cost radon mitigation or well water treatment estimate. We also offer cost effective well pump repairs throughout Fairfield, New Haven, Litchfield, and portions of Hartford and Middlesex counties. Schedule yours today!

"I recently had the pleasure of working with CT Radon and Well Water Solutions, and I can't recommend them highly enough! From start to finish, they demonstrated professionalism that truly stands out. The team was timely, arriving exactly when they said they would, and they wasted no time in getting to work. Kevin, in particular, was fantastic. His great personality made the entire process not only efficient but also enjoyable. He took the time to explain everything clearly and answered all of my questions with patience and expertise. The work they completed exceeded my expectations, providing me with peace of mind regarding radon levels and well water quality. If you're in need of radon mitigation or well water solutions, look no further than CT Radon. They are a reliable choice that I would recommend to anyone in need of their services. Thank you again, Matt, for all your hard work!"

Moses D on August 2025

Our team has over 90 years of combined experience providing reliable radon mitigation, water filtration, and well pump services and solutions to the Fairfield, New Haven, Hartford and Litchfield Counties of CT. Want to create a healthier and safer home environment? Call CT Radon and Well Water Solutions to schedule a no-cost radon mitigation or well water treatment estimate. We also offer cost effective well pump repairs throughout Fairfield, New Haven, Litchfield, and portions of Hartford and Middlesex counties. Schedule yours today!

"I recently had the pleasure of working with CT Radon and Well Water Solutions, and I can't recommend them highly enough! From start to finish, they demonstrated professionalism that truly stands out. The team was timely, arriving exactly when they said they would, and they wasted no time in getting to work. Kevin, in particular, was fantastic. His great personality made the entire process not only efficient but also enjoyable. He took the time to explain everything clearly and answered all of my questions with patience and expertise. The work they completed exceeded my expectations, providing me with peace of mind regarding radon levels and well water quality. If you're in need of radon mitigation or well water solutions, look no further than CT Radon. They are a reliable choice that I would recommend to anyone in need of their services. Thank you again, Matt, for all your hard work!"

Moses D on August 2025


Luis Septic and Drain Services
5.00(
5
)
Luis Septic and Drain Services
5.00(
5
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Situated in Derby, Luis Septic & Drain Services LLC is here to take the stress out of your plumbing issues, no matter the size. I understand how annoying blocked pipes or broken plumbing can be – I also specialize in septic tank cleaning & inspections. I am a specialist in both domestic and commercial plumbing, so whether you're having trouble at home or in your office, I'm available to provide a professional service at competitive prices.

"It was good, there were no problems."

Chuck V on August 2023

Situated in Derby, Luis Septic & Drain Services LLC is here to take the stress out of your plumbing issues, no matter the size. I understand how annoying blocked pipes or broken plumbing can be – I also specialize in septic tank cleaning & inspections. I am a specialist in both domestic and commercial plumbing, so whether you're having trouble at home or in your office, I'm available to provide a professional service at competitive prices.

"It was good, there were no problems."

Chuck V on August 2023

...
Showing 1-10 of 209

FAQs for septic tank service projects in Cos Cob, CT

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.

The Cos Cob, CT homeowners’ guide to septic tank services
From average costs to expert advice, get all the answers you need to get your job done.
household septic tank in garden
Mar 17, 2025
Mar 17, 2025
You should do a septic inspection once every one to three years to ensure you don’t have any issues. Learn about septic inspection costs before scheduling.
Family and friends enjoying their dinner in the backyard
Mar 10, 2025
Mar 10, 2025
Replacing a drain field requires digging up quite a bit of land and involves a decent amount of testing. Using this guide, you’ll learn how much it costs to replace a drain field based on a few key factors such as size and type of septic system.
Modern cottage home exterior
Mar 10, 2025
Mar 10, 2025
The average cost to connect to a public sewer line can vary depending on the linear foot, piping material, local regulations, and more.
A house with a large yard and blooming gardens
Mar 3, 2025
Mar 3, 2025
Septic failure is no picnic, but it needs to be addressed. We explore cost-saving and financing options for those who can’t afford a new septic system.
cesspool on the backyard
May 16, 2024
May 16, 2024
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.
PVC pipe with a standard sewer trap
May 17, 2024
May 17, 2024
Wondering what to do if you smell sewer gas in your house? Fortunately, the problem is relatively easy to prevent and fix—here’s how.