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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon100
    Verified septic tank services reviews

Find Septic tank pros in Somersworth

Avatar for Derry Plumbing & Heating

Derry Plumbing & Heating

41 Birch St
4.50(
30
)
Approved Pro

Derry Plumbing & Heating

41 Birch St
4.50(
30
)
Approved Pro
Customers say: Quality work
36 years of experience
Free onsite estimate

If you�re familiar with plumbing, you know that doing it right takes just the right recipe: two parts job knowledge and three parts skill. At Londonderry Plumbing and Heating, we provide everything you need to secure the perfect plumbing solution, a mixture that will do you right, just like home cooking! No job is too small or too challenging for our dedicated professionals! Londonderry Plumbing and Heating can tackle your most challenging plumbing problems and do so at affordable rates. If you are looking for a plumber who is highly qualified, quick to respond and a pleasure to do business with, give us a call. We look forward to adding you to our list of satisfied customers!

"Great service! Emergency service and done within the day!"

Bonnie S on May 2025

If you�re familiar with plumbing, you know that doing it right takes just the right recipe: two parts job knowledge and three parts skill. At Londonderry Plumbing and Heating, we provide everything you need to secure the perfect plumbing solution, a mixture that will do you right, just like home cooking! No job is too small or too challenging for our dedicated professionals! Londonderry Plumbing and Heating can tackle your most challenging plumbing problems and do so at affordable rates. If you are looking for a plumber who is highly qualified, quick to respond and a pleasure to do business with, give us a call. We look forward to adding you to our list of satisfied customers!

"Great service! Emergency service and done within the day!"

Bonnie S on May 2025


Avatar for Septic Designs of NH, LLC

Septic Designs of NH, LLC

12 Folsom St
4.75(
25
)
Approved Pro

Septic Designs of NH, LLC

12 Folsom St
4.75(
25
)
Approved Pro
Customers say: Terrific value
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
24 local quotes requested

Septic Designs of NH LLC is a Veteran owned small business with BBB accreditation. We take great pride in our work and are not satisfied until you are. We do Septic Designs, Inspections, Tank Replacements, and Septic Repairs. We also clear main sewer lines and do Trenchless Pipe Repair. Which is a NO DIG solution for pipe replacements. Our jetter is also a HEATED jetter for that tough grease or other buildup where you need some extra hot water to really clean the pipe.

"I called every plumber around and Septic Design of NH had the best price to put a camera down the sewer line. Problem was located in no time."

Vickie C on September 2021

Septic Designs of NH LLC is a Veteran owned small business with BBB accreditation. We take great pride in our work and are not satisfied until you are. We do Septic Designs, Inspections, Tank Replacements, and Septic Repairs. We also clear main sewer lines and do Trenchless Pipe Repair. Which is a NO DIG solution for pipe replacements. Our jetter is also a HEATED jetter for that tough grease or other buildup where you need some extra hot water to really clean the pipe.

"I called every plumber around and Septic Design of NH had the best price to put a camera down the sewer line. Problem was located in no time."

Vickie C on September 2021


Avatar for River View Construction Co.

River View Construction Co.

No reviews yet

River View Construction Co.

No reviews yet

Welcome to River View Construction Co. Established in 2014 - We offer General Contracting, Excavation, Forestry Services, Plowing & Sanding. We are fully insured & reputable. We strive to provide an elite experience, seamless, professional & with sense of urgency.

Welcome to River View Construction Co. Established in 2014 - We offer General Contracting, Excavation, Forestry Services, Plowing & Sanding. We are fully insured & reputable. We strive to provide an elite experience, seamless, professional & with sense of urgency.


Remodels, fireplace insert build outs, decks, additions, sheds and garages we do it all even the dirt work, cellar holes drive ways, grading, shed pads. Give us a call


Avatar for Busch Site Contracting LLC

Busch Site Contracting LLC

5.00(
4
)

Busch Site Contracting LLC

5.00(
4
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Busch Site Contracting, LLC is an excavation contractor proudly serving in New Hampshire & Maine. We strive to not only meet, but exceed the expectations of our clients. Providing premier site work services from excavation, land clearing, utilities and more, we have you covered. We value our client relationships and ensure our priority to deliver seamless, on-time and successful results. We do not offer interior fuel tank removal.

"It went really well, Sean was very helpful and did the job quickly. He was tied up on another job for a while but once he got to our house, he removed the concrete steps quickly and efficiently."

Marc-Anthony S on February 2025

Busch Site Contracting, LLC is an excavation contractor proudly serving in New Hampshire & Maine. We strive to not only meet, but exceed the expectations of our clients. Providing premier site work services from excavation, land clearing, utilities and more, we have you covered. We value our client relationships and ensure our priority to deliver seamless, on-time and successful results. We do not offer interior fuel tank removal.

"It went really well, Sean was very helpful and did the job quickly. He was tied up on another job for a while but once he got to our house, he removed the concrete steps quickly and efficiently."

Marc-Anthony S on February 2025


Hunt's Septic Service LLC

No reviews yet

Hunt's Septic Service LLC

No reviews yet

Hunts septic services provides septic pumping, septic inspections, and septic installations in the southern NH area. we have 10+ years of experience. all work we provide is to the highest standard.

Hunts septic services provides septic pumping, septic inspections, and septic installations in the southern NH area. we have 10+ years of experience. all work we provide is to the highest standard.


Avatar for NORTHERN HOME & EXCAVATION

NORTHERN HOME & EXCAVATION

29 Littleworth Rd
3.33(
3
)

NORTHERN HOME & EXCAVATION

29 Littleworth Rd
3.33(
3
)
8 years of experience

Here is what we do: NORTHERN HOME & EXCAVATION specializes in: * Foundations Holes, Septic systems       * Underground utility work & repairs,      * Site Work: Land clearing, grading/ sloping, drainage, shed prep * Driveway grading, Culverts, Extensions & repairs (no asphalt work) Proudly serving customers in: NH areas: Portsmouth, New Castle, Dover, Rollinsford, Barrington, Madbury, Durham, Stratham, Exeter, Somersworth, Rochester, New Market, Newington, Hampton, North Hampton, Rye, Strafford, Exeter, Somersworth, Rochester, New Market, Newington, Hampton, North Hampton, Rye, NH areas   ME areas: York, Eliot, Kittery, Berwick ME areas Our company philosophy: “To do your project well enough, that you feel compelled to refer anyone you know that needs our services”! Please call/ text for a FREE Estimate #(207) 517-0800

"Worst homeowner experience of my life. Hired to replace a sewer line from my house to the street - three day job turned into three weeks - said they didn’t need to shut off our water, though we asked, then broke the water line and flooded the hole, which backed up into the broken sewer line and then back into my basement - city engineers were all over the job because of safety concerns, including a teenage boy working in a 12 foot hole with no cave in support. I doubt the city of Dover would even give him a permit again. - never worked a full day. Left early for reasons ranging from broken equipment, teaching karate lessons, or going to daughter’s events - hole was definitely not packed back in correctly as we ended up with a moat the following spring. A pizza delivery guy literally fell into the dent in my front yard. - cost of job went up 150% from original quote and he wouldn’t itemize the bill - and here we are a year and a week later and my sewer line is backed up again so the job was bunk. I’m not even kind of surprised. Dana is the worst. Stay away from this business. I will be filing complaints with anyone and everyone who monitors these types of business. Horrible."

Margot E on September 2023

Here is what we do: NORTHERN HOME & EXCAVATION specializes in: * Foundations Holes, Septic systems       * Underground utility work & repairs,      * Site Work: Land clearing, grading/ sloping, drainage, shed prep * Driveway grading, Culverts, Extensions & repairs (no asphalt work) Proudly serving customers in: NH areas: Portsmouth, New Castle, Dover, Rollinsford, Barrington, Madbury, Durham, Stratham, Exeter, Somersworth, Rochester, New Market, Newington, Hampton, North Hampton, Rye, Strafford, Exeter, Somersworth, Rochester, New Market, Newington, Hampton, North Hampton, Rye, NH areas   ME areas: York, Eliot, Kittery, Berwick ME areas Our company philosophy: “To do your project well enough, that you feel compelled to refer anyone you know that needs our services”! Please call/ text for a FREE Estimate #(207) 517-0800

"Worst homeowner experience of my life. Hired to replace a sewer line from my house to the street - three day job turned into three weeks - said they didn’t need to shut off our water, though we asked, then broke the water line and flooded the hole, which backed up into the broken sewer line and then back into my basement - city engineers were all over the job because of safety concerns, including a teenage boy working in a 12 foot hole with no cave in support. I doubt the city of Dover would even give him a permit again. - never worked a full day. Left early for reasons ranging from broken equipment, teaching karate lessons, or going to daughter’s events - hole was definitely not packed back in correctly as we ended up with a moat the following spring. A pizza delivery guy literally fell into the dent in my front yard. - cost of job went up 150% from original quote and he wouldn’t itemize the bill - and here we are a year and a week later and my sewer line is backed up again so the job was bunk. I’m not even kind of surprised. Dana is the worst. Stay away from this business. I will be filing complaints with anyone and everyone who monitors these types of business. Horrible."

Margot E on September 2023


Avatar for New Hampshire Groundscapes

New Hampshire Groundscapes

73 King Rd
5.00(
2
)

New Hampshire Groundscapes

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

NHG is your local excavation & site work company. We offer many different services such as septic system installs/ replacements & designs, site work for new houses, garages, additions & commercial buildings. NHG also provides concrete foundation services. We can accomplish the site work for your project and install the foundation & concrete floor as well. We are your one stop shop!! Other services that we offer are yard/ driveway & parking lot grading/ expansion, stumping, pool pads, tree removal, sink hole dig out & fill, ledge hammering, water/sewer line services/repairs, & much more. We take great pride in providing our customers with very competitive prices and always deliver satisfactory results! Visit our website and Facebook for reviews and pictures of completed and ongoing projects.

"Great. will use them again."

Cheryl D on November 2020

NHG is your local excavation & site work company. We offer many different services such as septic system installs/ replacements & designs, site work for new houses, garages, additions & commercial buildings. NHG also provides concrete foundation services. We can accomplish the site work for your project and install the foundation & concrete floor as well. We are your one stop shop!! Other services that we offer are yard/ driveway & parking lot grading/ expansion, stumping, pool pads, tree removal, sink hole dig out & fill, ledge hammering, water/sewer line services/repairs, & much more. We take great pride in providing our customers with very competitive prices and always deliver satisfactory results! Visit our website and Facebook for reviews and pictures of completed and ongoing projects.

"Great. will use them again."

Cheryl D on November 2020


Avatar for Farrell Contracting Services, LLC

Farrell Contracting Services, LLC

125 High Rd
5.00(
6
)

Farrell Contracting Services, LLC

125 High Rd
5.00(
6
)
Customers say: Quick response
7 years of experience

Services provided include but are not limited to: Site Work, Excavation, Sewer & Water Connections, Utilities , Septic Systems, Culverts and Drainage, Public/Private Driveways & Roads, Material Deliveries (Large or Small Quantities), Trucking, Demolition, Snow Plowing, Lot Clearing, Field Building, Lawn Installation, Grading, Retaining Walls, Ponds, Brush Removal, Stump Removal, Trail Maintenance , Erosion Control, Misc. Property Improvements

"I was building a modular ranch and hired Farrell Contracting to excavate and grade the site as well as install the septic system. Jake is a pleasure to work with and I have no reservations recommending him to others."

Frank L on October 2025

Services provided include but are not limited to: Site Work, Excavation, Sewer & Water Connections, Utilities , Septic Systems, Culverts and Drainage, Public/Private Driveways & Roads, Material Deliveries (Large or Small Quantities), Trucking, Demolition, Snow Plowing, Lot Clearing, Field Building, Lawn Installation, Grading, Retaining Walls, Ponds, Brush Removal, Stump Removal, Trail Maintenance , Erosion Control, Misc. Property Improvements

"I was building a modular ranch and hired Farrell Contracting to excavate and grade the site as well as install the septic system. Jake is a pleasure to work with and I have no reservations recommending him to others."

Frank L on October 2025


LJM Construction, LLC

PO Box 2001
No reviews yet

LJM Construction, LLC

PO Box 2001
No reviews yet

Building lot development-Comm and Res Septic System Installation-NH Licensed Site work and dig foundations (we do not pour) Culvert and road repair General Excavation and Grading Erosion and drainage control Municipal water and sewer Pumping Stations Storm water management Demolition Earth moving Lot clearing and prep Drainage installation Building driveways Stumping LJM Construction and Excavation is located in Hillsborough, NH and has been in operation with over 40 years of experience, a renown leader in the industry. A leading provider for commercial and residential communities throughout the region, LJM services include excavation, foundation and site work, underground utility work, retaining walls, general construction, snow management and more. We take pride in our locally-owned business and our ongoing relationships with our customers, leading to strong customer loyalty. LJM Construction provides personalized attention before, during, and after our service. We believe that our success is based on excellent customer service and quality, timely work. Our goal is to exceed your expectations!

Building lot development-Comm and Res Septic System Installation-NH Licensed Site work and dig foundations (we do not pour) Culvert and road repair General Excavation and Grading Erosion and drainage control Municipal water and sewer Pumping Stations Storm water management Demolition Earth moving Lot clearing and prep Drainage installation Building driveways Stumping LJM Construction and Excavation is located in Hillsborough, NH and has been in operation with over 40 years of experience, a renown leader in the industry. A leading provider for commercial and residential communities throughout the region, LJM services include excavation, foundation and site work, underground utility work, retaining walls, general construction, snow management and more. We take pride in our locally-owned business and our ongoing relationships with our customers, leading to strong customer loyalty. LJM Construction provides personalized attention before, during, and after our service. We believe that our success is based on excellent customer service and quality, timely work. Our goal is to exceed your expectations!

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Septic Tanks questions, answered by experts

The main difference between a mound septic system and a conventional one is that the drain field in a mound system is built up into a mound composed of sand and gravel to increase the filtration time the wastewater sees before it is returned to the aquifer. There’s also a significant cost difference, with mound systems typically costing far more than standard septic systems.

Trenches are 12 to 24 inches deep and 8 inches wide. However, the right depth for your trench will depend on the nature of your project. For example, if you’re digging a trench as part of a French drain installation, it should be 18 inches deep. An excavation professional can explain how deep your trench should be.

A septic tank always has some amount of liquid in it—which should usually be 8 to 12 inches from the top of the tank. If the liquid level is higher than that or is overflowing the drainage pipe that leads out to the leach field, the tank may be too full and in need of pumping.

The size of your water well pressure tank is limited only by your budget and the amount of space you have to use. Larger tanks can hold more water, meaning your well pump will need to cycle less often. This can extend the life of both the pressure tank and your well pump. Larger tanks cost more and take up more room, though.

An outdoor water valve typically has a round or oval handle that you can turn to control the water flow. It may be located in a protective box or pit near the property line, where the main water line connects to your house.

The Somersworth, NH homeowners’ guide to septic tank services

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