Top-rated septic system installers and replacers.

Get matched with top septic system installers and replacers in New Boston, NH

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 New Boston

Tom Howe Septic Systems and Excavation

5.00(
6
)
Approved Pro

Tom Howe Septic Systems and Excavation

5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
58 years of experience

A few services we provide are residential and commercial septic pumping, and drain field install/repair. We are conveniently located to serve Hillsborough County. We are licensed, bonded and insured. Tom Howe Septic Systems is a family-owned and operated business that has served the Merrimack area since 1968.

"A"

Tariq S on May 2022

A few services we provide are residential and commercial septic pumping, and drain field install/repair. We are conveniently located to serve Hillsborough County. We are licensed, bonded and insured. Tom Howe Septic Systems is a family-owned and operated business that has served the Merrimack area since 1968.

"A"

Tariq S on May 2022


Corriveau Construction Company

5.00(
5
)
Approved Pro

Corriveau Construction Company

5.00(
5
)
Approved Pro
Customers say: Quick response
13 local quotes requested
54 years of experience

Bob has been in business for 50 years. Started working on his own property and was disappointed in the quality of other people's work so he decided to go leave a career in electronics sales and into business himself.Became a career in building and developing.Built subdivisions.Built roads and all site work for new homes.

"This is the best construction pro I had in my life. If there is anyone's looking for the best construction crew this company is the best. I've never had anyone in my life as good as Corriveau construction company. They went beyond and above what I expected. "

Bill A on September 2025

Bob has been in business for 50 years. Started working on his own property and was disappointed in the quality of other people's work so he decided to go leave a career in electronics sales and into business himself.Became a career in building and developing.Built subdivisions.Built roads and all site work for new homes.

"This is the best construction pro I had in my life. If there is anyone's looking for the best construction crew this company is the best. I've never had anyone in my life as good as Corriveau construction company. They went beyond and above what I expected. "

Bill A on September 2025


Avatar for Innovative Septic Solutions

Innovative Septic Solutions

4.59(
27
)
Approved Pro

Innovative Septic Solutions

4.59(
27
)
Approved Pro
Super Service Award
Customers say: Quality work
41 years of experience
Free onsite estimate

Serving Hillsborough and the surrounding counties, Innovative Septic & Site Solutions LLC is your trusted full-service septic design and installation team. Our experienced professionals ensure every job is done right. Call now for a consultation!

"I was selling a 71 year old home and the inspection revealed a failing septic system. I had called another company as well as Bob snd had opted to use the other company which was local in Merrimack. Sadly I was told it would be 6 to 8 weeks. I could not wait that long since the house needed to be sold before winter. I called Bob and he began the same day! He explained he was also an engineer and could do the required septic design himself. He was able to have the entire job done in 2 weeks and we had a contract to sell before he finished. He was a delight to work with and I woukd recommend this company without any hesitation."

Betty F on October 2025

Serving Hillsborough and the surrounding counties, Innovative Septic & Site Solutions LLC is your trusted full-service septic design and installation team. Our experienced professionals ensure every job is done right. Call now for a consultation!

"I was selling a 71 year old home and the inspection revealed a failing septic system. I had called another company as well as Bob snd had opted to use the other company which was local in Merrimack. Sadly I was told it would be 6 to 8 weeks. I could not wait that long since the house needed to be sold before winter. I called Bob and he began the same day! He explained he was also an engineer and could do the required septic design himself. He was able to have the entire job done in 2 weeks and we had a contract to sell before he finished. He was a delight to work with and I woukd recommend this company without any hesitation."

Betty F on October 2025


Granite State Sewer & Drain Cleaning Co

4.92(
12
)
Approved Pro

Granite State Sewer & Drain Cleaning Co

4.92(
12
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
45 years of experience

Granite State Sewer & Drain Cleaning Co is your go-to plumbing and drain cleaning expert in New Hampshire. With our extensive experience and top-notch service, we stand out from the competition. Contact us today for all your plumbing needs! Additional DBAs - Granite State Sewer Pumps, Granite State Sewer & Drain Cleaning Inc.

"good job and reasonable pricing"

David S on September 2025

Granite State Sewer & Drain Cleaning Co is your go-to plumbing and drain cleaning expert in New Hampshire. With our extensive experience and top-notch service, we stand out from the competition. Contact us today for all your plumbing needs! Additional DBAs - Granite State Sewer Pumps, Granite State Sewer & Drain Cleaning Inc.

"good job and reasonable pricing"

David S on September 2025


Miller Environmental

No reviews yet

Miller Environmental

No reviews yet
29 years of experience

Family owned and operated

Family owned and operated


Carlton Plumbing & Heating

No reviews yet

Carlton Plumbing & Heating

No reviews yet
25 years of experience

Here at Carlton Plumbing & Heating, we are a 24 hour service! Call to make your appointment today!

Here at Carlton Plumbing & Heating, we are a 24 hour service! Call to make your appointment today!


Avatar for American Excavating Corporation

American Excavating Corporation

No reviews yet

American Excavating Corporation

No reviews yet
36 years of experience

- Site Work - Material Sales - Trucking - - Excavation - - Driveway Repairs - - Driveway Paving - - Yard Expansions - - New Septic Systems - - Rock Removal - - Stump Removal - - Drainage - - Any and All excavation needs! * Material Sales * & Delivery Stone Sand Loam Fill And many more... American Excavating Corporation is a family owned business in Derry NH. American Excavating has been in business for 30 years serving local businesses, municipalities, developers and homeowners alike. We are a NHDOT certified contractor that can bring experience and professionalism to your home or business project. We have the equipment and personnel to get your job done on time and on budget. American Excavating looks forward to helping you with your next project. We always offer free quotes and knowledge to anyone who asks. If we cant do your project, we can align you with someone who can.

- Site Work - Material Sales - Trucking - - Excavation - - Driveway Repairs - - Driveway Paving - - Yard Expansions - - New Septic Systems - - Rock Removal - - Stump Removal - - Drainage - - Any and All excavation needs! * Material Sales * & Delivery Stone Sand Loam Fill And many more... American Excavating Corporation is a family owned business in Derry NH. American Excavating has been in business for 30 years serving local businesses, municipalities, developers and homeowners alike. We are a NHDOT certified contractor that can bring experience and professionalism to your home or business project. We have the equipment and personnel to get your job done on time and on budget. American Excavating looks forward to helping you with your next project. We always offer free quotes and knowledge to anyone who asks. If we cant do your project, we can align you with someone who can.


Washington Street Plumbing and Heating

No reviews yet

Washington Street Plumbing and Heating

No reviews yet
Emergency services offered

Call us today! Available 24/7/365. Ready willing and able to help with whatever problem that might arise day or night. Call us today to schedule an appointment. Why Choose Us? We are: Insured, Certified, Licensed, 24/7 emergency service, Same-day service offered, 100% guaranteed work, Professional technicians, Environmentally conscious, Factory trained and authorized.

Call us today! Available 24/7/365. Ready willing and able to help with whatever problem that might arise day or night. Call us today to schedule an appointment. Why Choose Us? We are: Insured, Certified, Licensed, 24/7 emergency service, Same-day service offered, 100% guaranteed work, Professional technicians, Environmentally conscious, Factory trained and authorized.


GRADY CONSULTING LLC

5.00(
2
)

GRADY CONSULTING LLC

5.00(
2
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Grady Consulting LLC is a family owned and operated professional Civil Engineering Company serving Massachusetts since 1998.

"I was looking for a surveyor to do some work on our property. As a long time member I've used Angie's list in the past, but haven't had occasion to do so in quite some time. I looked at the companies that were available in our area and considered Grady Consulting. I was somewhat surprised to see that they only had one, brief review. I made the decision to call after viewing their web site. I first spoke with Marianne at Grady Consulting in late June. I mentioned to her that I had found them on Angie's list and was somewhat concerned that they only had one review. She told me that they were not an Angie's list member. Since everyone I had hired was a member, I appreciated that she informed me that they were not. Since we have never had a survey done of our property, I was unfamiliar with how things worked but told her that we wanted to have our property surveyed and the lines staked. We also wanted a plan showing the elevations and location of the house on our lot. I also mentioned that we wanted this information so that we could have an architect draw up plans for a possible, future addition. Marianne was my first contact and thus my first impression of the company came from her. I found her to be a good listener and very knowledgeable. She both asked and answered my questions and responded to all my concerns. She also asked me about my future plans. She was able to pull up our lot on her computer and to let me know that our property had some wetlands in one corner and said that they would also be able to have their botanist walk the property and mark any necessary areas of concern. She repeated back all that I told her I would like to have done and said she would work up a proposal for us. Then, after reviewing the proposal we could decide on what and how much we wanted to do at this time. After speaking with her, I felt that they were very professional in their approach and was comfortable in taking the next step. We received an email that showed our property on a map and were able to see the small area of wetlands that were mentioned. Also, a very comprehensive proposal that listed the scope of services, the estimated fee schedule, the payment schedule and a rate schedule. Out of the 13 listed services we decided to do the first 4. We decided to wait until the late fall, when they would be less busy, to have the work done. In mid November I called and gave the required retainer and said I would bring the signed proposal to their office because I wanted to show them some old plans we had showing a few changes that had been made over the years to bordering properties. I met with Mr Grady who was very polite and professional. He listened to my concerns, answered my questions and then made copies of the old plans. The next day the botanist came and flagged the wetland areas. He spoke with my husband who told me that he was very knowledgable and personable. Two days later two men came and spent a few hours working and then marked the corners of the property with stakes. The rest of the work on the property took place after the Holidays. My husband did have occasion to speak with the surveyor and mentioned that he was very professional and quite jovial considering the extreme, cold weather on that day. We received the progress invoice for the completed work and it was structured so that you could easily see what was done, who did it, how much time it took, what the rate was and how much we were billed for each service provided. The estimated fee given for this job was somewhat higher than the end cost. An envelope containing two copies of the existing conditions plan arrived a week or so later. Since we received a list of 13 services and decided only to do 4, we now have the information for future work we might decide to do."

Mary M on February 2018

Grady Consulting LLC is a family owned and operated professional Civil Engineering Company serving Massachusetts since 1998.

"I was looking for a surveyor to do some work on our property. As a long time member I've used Angie's list in the past, but haven't had occasion to do so in quite some time. I looked at the companies that were available in our area and considered Grady Consulting. I was somewhat surprised to see that they only had one, brief review. I made the decision to call after viewing their web site. I first spoke with Marianne at Grady Consulting in late June. I mentioned to her that I had found them on Angie's list and was somewhat concerned that they only had one review. She told me that they were not an Angie's list member. Since everyone I had hired was a member, I appreciated that she informed me that they were not. Since we have never had a survey done of our property, I was unfamiliar with how things worked but told her that we wanted to have our property surveyed and the lines staked. We also wanted a plan showing the elevations and location of the house on our lot. I also mentioned that we wanted this information so that we could have an architect draw up plans for a possible, future addition. Marianne was my first contact and thus my first impression of the company came from her. I found her to be a good listener and very knowledgeable. She both asked and answered my questions and responded to all my concerns. She also asked me about my future plans. She was able to pull up our lot on her computer and to let me know that our property had some wetlands in one corner and said that they would also be able to have their botanist walk the property and mark any necessary areas of concern. She repeated back all that I told her I would like to have done and said she would work up a proposal for us. Then, after reviewing the proposal we could decide on what and how much we wanted to do at this time. After speaking with her, I felt that they were very professional in their approach and was comfortable in taking the next step. We received an email that showed our property on a map and were able to see the small area of wetlands that were mentioned. Also, a very comprehensive proposal that listed the scope of services, the estimated fee schedule, the payment schedule and a rate schedule. Out of the 13 listed services we decided to do the first 4. We decided to wait until the late fall, when they would be less busy, to have the work done. In mid November I called and gave the required retainer and said I would bring the signed proposal to their office because I wanted to show them some old plans we had showing a few changes that had been made over the years to bordering properties. I met with Mr Grady who was very polite and professional. He listened to my concerns, answered my questions and then made copies of the old plans. The next day the botanist came and flagged the wetland areas. He spoke with my husband who told me that he was very knowledgable and personable. Two days later two men came and spent a few hours working and then marked the corners of the property with stakes. The rest of the work on the property took place after the Holidays. My husband did have occasion to speak with the surveyor and mentioned that he was very professional and quite jovial considering the extreme, cold weather on that day. We received the progress invoice for the completed work and it was structured so that you could easily see what was done, who did it, how much time it took, what the rate was and how much we were billed for each service provided. The estimated fee given for this job was somewhat higher than the end cost. An envelope containing two copies of the existing conditions plan arrived a week or so later. Since we received a list of 13 services and decided only to do 4, we now have the information for future work we might decide to do."

Mary M on February 2018


Norwood Plumbing and Heating

No reviews yet

Norwood Plumbing and Heating

No reviews yet
Emergency services offered

As a bathroom specialist in Michigan we are renowned for our high standard of bathroom services, with all work completed promptly and for a reasonable rate. However we are dedicated to providing a comprehensive range of services to cover all your residential requirements, including boiler installations, landlord certificates and under floor heating.

As a bathroom specialist in Michigan we are renowned for our high standard of bathroom services, with all work completed promptly and for a reasonable rate. However we are dedicated to providing a comprehensive range of services to cover all your residential requirements, including boiler installations, landlord certificates and under floor heating.

...
Showing 1-10 of 430
FAQs for septic system installation and replacement projects in New Boston, NH

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 New Boston, NH 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.