Top-rated septic system installers and replacers.

Get matched with top septic system installers and replacers in Old Lyme, CT

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Septic system installers and replacers in Old Lyme

Avatar for Diamond Plumbing & Heating, LLC
Diamond Plumbing & Heating, LLC
3.7(
86
)

Serving Old Lyme, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2003

Emergency services offered

Warranties offered

"Great experience!! Amilcar and his team were efficient, respectful and very knowledgeable. They walked me through the process each step of the way, providing me with different options and really making me feel like part of the process with the installation of my ductless system. Great customer service, Amilcar was always a available when I called. I definitely recommend Diamond Plumbing for your heating, A/C or plumbing work!!"
4 High Efficiency Combi Install
Sewer main replacement
Surrey Ln
Clay sewer main replacement
Clay sewer main replacement

+13

8 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Snow Septic Repair, LLC
Snow Septic Repair, LLC
New to Angi

Serving Old Lyme, CT and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

Snow Septic Repair LLC provides our customers with quality workmanship & honest pricing for all your septic system repair needs. Servicing the greater Middlesex county area. Call us today to schedule a free estimate!

New Septic Tank
New Leaching Field
New Septic Tank & Leaching Field
Finished Grade Landscaped
Waterfront Completed Installation

+4

Response time3 days
Avatar for Dan Mackin, Jr., Construction
Dan Mackin, Jr., Construction
4.7(
21
)

Serving Old Lyme, CT and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"My house is closing August 2016 and just found out I need new septic system....House under deposit. Do y9u finance nd get paid at closing? You could put a lien on my property. I don't want to lose this sale and the young buyers love the house but can't afford new system."
 Rock breaking
foundation
septic install
mill machine foundation
 Beach pond retaining wal

+38

Response time1 day
Recommended by100%of homeowners
Bond Excavation
5.0(
10
)

Serving Old Lyme, CT and surrounding areas

In business since 2005

Free estimates

Credit card accepted

It can be a daunting task looking for not only the right contractor for your job but also the right contractor for you. We completely understand what you're going through. We know every customer has different desires, different needs and different schedules. We are not only here to turn your ideas into reality but to make it a memorable experience every step of the way. Call us right now, no matter where you are in the planning process.

Response time10 hrs
Recommended by87%of homeowners
Avatar for Stone Building Systems, LLC
Stone Building Systems, LLC
5.0(
5
)

Serving Old Lyme, CT and surrounding areas

In business since 2008

Free estimates

Offers commercial services

"Paul is extremely knowledgeable about excavation work and more specifically septic systems. I have used Paul on several projects from small tank, repairs to large engineered systems, and each time he delivers a perfect project, within our timeframe and at a reasonable price. I would highly recommend Paul and his team."
Septic Repair
Septic Repair
Response time6 hrs
Recommended by100%of homeowners
Avatar for Drainworks Plumbing & Septic LLC
Drainworks Plumbing & Septic LLC
4.2(
9
)

Serving Old Lyme, CT and surrounding areas

In business since 2017

Free estimates

Emergency services offered

The Plumbing, drain cleaning and septic experts. When others cant, we can. we are a niche plumbing company committed to providing an outstanding customer experience. We are proud to offer our customers * Up front pricing * Emergency support * Convenient Appointment windows * Service Warranty * Licensed & Insured We have over 20 years in the plumbing, septic, sewer, and drain cleaning service industry. We would appreciate the opportunity to earn your business and your trust.

Install new septic tank
Septic System Install
Pump Septic Tank
Septic System Install
Pump Septic Tank

+18

Recommended by75%of homeowners
Flushaway Septic Tank Cleaning Inc
5.0(
3
)

Serving Old Lyme, CT and surrounding areas

In business since 2015

Emergency services offered

Credit card accepted

"The septic tank had not been cleaned for over 10 years. Bill, from Flushaway Septic came within an hour and a half of my phone call. He explained what had to be done after opening up the septic tank and did the job promptly and neatly leaving the area perfectly clean. He charged $275 for a total pump out with lots of solid waste. He explained how to keep the tank clean and suggested a cleaning every 3 years. I highly recommend him to anyone needing this service."
Recommended by100%of homeowners
Avatar for Choice Home Warranty
Choice Home Warranty
4.0(
5,676
)

Serving Old Lyme, CT and surrounding areas

In business since 2008

Emergency services offered

Credit card accepted

"I would highly recommend choice over any home warranty as a home owner i had a major problem with my hvac system and they got it replaced in a timely fashion much respect for them don't miss out on a great deal"
Recommended by82%of homeowners
Showing 1-10 of 19
FAQs for septic system installation and replacement projects in Old Lyme, CT

The smallest standard septic system uses a 500-gallon tank, which costs between $875 and $1,150 installed. This size works well for single-occupant dwellings with minimal wastewater production. However, many local regulations specify minimum tank sizes, so check with your building department before committing to this compact option. Some jurisdictions require at least 750 gallons regardless of home size to ensure adequate waste processing capacity.

The installation timeline varies based on site conditions, permit processing, and contractor schedules. The process includes obtaining permits, conducting soil tests, excavation, tank placement, leach field construction, and final connections. Weather conditions, soil challenges, and inspection scheduling can all affect the overall timeline. It's wise to begin planning well in advance of when you need the system operational.

The most economical approach is to install a conventional anaerobic system with a plastic tank. To minimize costs while maintaining legality, obtain multiple quotes from licensed installers, consider scheduling during their slower seasons, and handle basic site preparation yourself. Never skip permits or required testing to save money—illegal installations can result in significant fines and mandatory removal, ultimately costing far more than doing it right initially.

Regular pumping helps prevent system failures and extends operational life. Most small systems require pumping every three to five years, though frequency depends on household size and usage patterns. Pumping services cost between $290 and $530, making this maintenance expense relatively minor compared to potential repair costs ranging from $500 to $2,600 for neglected systems. Establishing a regular maintenance schedule based on your installer's recommendations helps avoid costly emergency services.

The Old Lyme, CT homeowners’ guide to septic system installations and replacements

From average costs to expert advice, get all the answers you need to get your job done.