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Find Sewer main install, replace or repairers in Portsmouth

Avatar for Mr. Rooter Plumbing & Heating
Mr. Rooter Plumbing & Heating
3.9(
355
)

Serving Portsmouth, NH and surrounding areas

Approved

In business since 1995

Emergency services offered

Warranties offered

"I had a leak in my water main coming into the house in my crawl space. I called 2 local firms without being able to have so one come help. Linda from Mr.Rooter called me back within 10 minutes and scheduled a plumber for the next morning.Brian arrived by 11am accessed the situation gave me an estimate and was able to repair the leak. Very professional, courteous and timely. I still have not heard from my local company ! Very nice to have water again. I will use them again."
34 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Heritage Home Service
Heritage Home Service
4.2(
1,355
)

Serving Portsmouth, NH and surrounding areas

Approved (Corporate)

In business since 1988

Emergency services offered

Warranties offered

"Rick addressed all my concerns. He quickly replaced the part in the toilet. He tightened the shower faucet and cleared the drains. He left the bathroom clean. He was very courteous and answered all of my questions."
Golf Tournament
Water quality team
HVAC tech
Electrical team
Bryan, electrician

+24

146 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Derry Plumbing & Heating
Derry Plumbing & Heating
3.7(
43
)

Serving Portsmouth, NH and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"Once again Derry Plumbing has met all my expectations for quality work and complete professional service. Mike and Christian just removed a tub unit and replaced with a walk-in shower unit. They were courteous, answered all my questions and kept everything spotlessly clean every day, I've used them for years and will continue to do so and will recommend them to friends!"
Rinnai install
Designer shower
Drain line
Showroom shower/tub stall
Faucet fixtures

+2

Response time9 hrs
Response rate86%
6 neighbors recently requested a quote
Avatar for Coy Plumbing & Heating
Coy Plumbing & Heating
5.0(
8
)

Serving Portsmouth, NH and surrounding areas

In business since 2024

Free estimates

Emergency services offered

"Mitchell was very professional and great at the work he’s done on my 2 homes. I’ve had 2 bathroom remodels. Funace and hot water heater replaced. Put an expansion water tank on one of my homes. Hooked up my water for my new refrigerator and dishwasher. Have not had any issues with his work. Highly recommend."
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+4

Response time2 days
Response rate100%
Recommended by87%of homeowners
Avatar for Brother Sons Excavation
Brother Sons Excavation
5.0(
6
)

Serving Portsmouth, NH and surrounding areas

In business since 2016

Brother sons Excavation has been in service for 10 years our family team specializes in multiple high quality services.\nPatios\nBlock walls \nWalkways \nGranite curbing \nYard enhancements \nHydro seeding\nDemolition\nHouse lots \n Excavation \n

Patios Project
Pool filled in wall built with hydro seeding
Driveways - Asphalt Project
Driveways - Asphalt Project
Patios Project

+69

Recommended by100%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,688
)

Serving Portsmouth, NH and surrounding areas

In business since 1971

Credit card accepted

"On all of the replacements or repairs there was a time period of 1 -3 weeks for the repairman. They were all professional . You have to read the contract , I missed the electric part and had to pay for it myself so read your warranty ."
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+2

Recommended by65%of homeowners
Kenco, LLC
5.0(
2
)

Serving Portsmouth, NH and surrounding areas

In business since 2018

Free estimates

Warranties offered

"THE BEST!! Leon,Leon Sr,and Aden did a meticulous job installing sump pump and outdoor drainage.So glad to have found this company,heaven sent!I got ghosted by several other plumbing companies and then I found KENCO,thank goodness!!Friendly,professional,masters at their craft,excellent communication,superb work and left work area neat and clean!Superior work ethic,a diamond in the rough!If you need plumbing service,look no further-THIS IS THE COMPANY YOU WANT!!The top of the line and great price to boot!Thank you Paige for your constant contact!"
Before
After
Well tank
Hybrid water heater
Hybrid water heater

+2

Response time40 mins
Recommended by50%of homeowners
DONOVAN PLUMBING AND HEATING LLC
New to Angi

Serving Portsmouth, NH and surrounding areas

In business since 2025

Free estimates

Offers commercial services

We're dedicated to providing our clients with the very best in service, installation, and repair for all phases of your plumbing needs. We specialize in a variety of residential and commercial services and take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients and guarantee your satisfaction.

Showing 1-10 of 11
FAQs for sewer main install, replace or repair projects in Portsmouth, NH

Sewer line replacement costs range from $50 to $250 per linear foot. Your replacement costs rise or fall based on material quality, installation complexity, and the specialized equipment crews need for excavation. Deeper lines cost more to access, and choosing budget-friendly PVC piping rather than premium copper also shifts the final price.

A sewer sleeve repairs cracked or damaged sections of a sewer pipe without the need for excavation. In this process, technicians insert a cured-in-place pipe (CIPP) liner, saturated with epoxy, to seal defects and restore the pipe’s integrity. This approach protects your yard, trims repair time, and adds years to your sewer system’s life—all while delivering reliable results.

Newer homes use durable PVC and ABS piping that offer smooth interiors and effective clog prevention at an affordable cost. Older homes use materials such as copper, Orangeburg, clay, cast iron, or lead, which require a licensed plumber’s inspection to confirm safety and performance. This clear distinction impacts maintenance and overall system reliability.

Red flags include persistent clogs, recurring sewage backups, and unexplained spikes in utility bills. Strong sulfur odors, bubbling drains, and visible sewage in the yard serve as unmistakable warning signs. These symptoms demand immediate professional inspection and repair to prevent further property damage and health hazards, ensuring the system operates safely.

All sewer line projects require permits because strict sanitary and biohazard regulations mandate regulatory approval. Homeowners must secure permits, incurring a specific permit fee of $200 in addition to contractor costs. A licensed professional or local building department manages the permitting process, ensuring the work complies with all legal requirements before the project begins.

A clogged sewer line is not covered by standard homeowner’s insurance policies because these policies exclude damage from regular wear, tear, and neglect. In cases of accidental damage—such as when tree roots block the line—certain policies provide coverage. Homeowners must review their policy details or consult with their insurance provider to confirm the coverage terms.

The Portsmouth, NH homeowners’ guide to sewer main install, replace or repairs

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