Should plumbers be certified or licensed?

<div>Yes, most states require plumbers to be licensed, and for good reason. Hiring an unlicensed plumber 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: <ul><li>The owner, principal, or relevant manager passed a criminal background check</li><li>Required to have applicable state and local licenses</li><li>Maintain an average star rating of 3.0 or better on our network, if they have at least one review</li><li>Paying to advertise their services</li><li>Meeting any other eligibility criteria required by Angi</li></ul> Keep in mind licensing is different from certifications. A license is a legal requirement to operate a business, while certifications are voluntary.</div>

What questions should I ask a plumbing contractor?

<div>Before <a href="https://www.angi.com/articles/7-questions-ask-hiring-plumber.htm">finding the right plumber for your job</a>, there are a few questions that you should ask, including: <ul><li>Are you licensed and insured?</li><li>Do you charge for estimates? </li><li>Is your fee a flat rate, or is it hourly?</li><li>Who will do the work? Are they all licensed and qualified plumbers?</li><li>What happens if any breaks or damages occur?</li><li>What is your response time in an emergency? </li><li>Is cleanup included in the quote?</li><li>Do your services come with a guarantee?</li></ul>Discussing these questions with your plumbing contractor will help eliminate future issues and clarify expectations. </div>

Should I clean before the plumber comes?

<div>Before your plumber pays you a visit, it’s a good idea to clean up any boxes, garbage, or other obstacles that could be in their way. In addition, it’s best practice to clean the area that needs to be inspected or worked on, like a toilet, for example. Make sure to keep kids and pets out of the way once the plumber arrives.</div>

How much are typical plumbing repair costs?

<div>Typically, <a href="https://www.angi.com/articles/how-much-will-plumbing-repair-cost.htm">plumbing repairs cost</a> about $325 per job but can range from $175 to $4,000 or more. Simple fixes, such as a toilet repair, will be less expensive at around $150 to $400. However, if you have a pipe that has burst, you can expect to pay between $1,000 and $4,000 or more. The project that needs to be completed, the size of your home, and the type of plumbing pipes you have can all impact the final cost. External factors such as supply chain issues and shortage of materials all play a part in how much this repair might be.</div>

How much do plumbers typically charge?

<div><a href="https://www.angi.com/articles/plumber-cost.htm">The average cost to hire a plumber</a> is around $100 an hour but can vary between $45 and $200 an hour depending on the plumber’s experience and the repair that you need. It’s also important to note that these prices can go up on holidays, and emergency plumber rates average $150 per hour, in addition to a flat-rate trip fee of $100 to $350. </div>

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Verified Reviews for Plumbing pros in Londonderry, NH

*The Angi rating for Plumbing companies in Londonderry, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Plumbing needs.

*The HomeAdvisor rating for Plumbing companies in Londonderry, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Plumbing needs.

Last update on August 15, 2025

Reviewed in December 2024
Plumbing clog! Smitty plumbing called right back. Came in an hour, fixed problem in 10 minutes. Plumber was professional and efficient. Would highly recommend.
Smitty Plumbing & Heating LLC
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Reviewed in January 2013
Plumb Perfect called back promptly and gave us a great estimate (they only bill by the half hour- whereas most plumbers charge by the hour- so if they only worked an hour and 20 min they would charge you for 2 hrs...Plumb Perfect would only charge for an hour and a half!). The other plumber...
Plumb Perfect Plumbing Inc.
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Reviewed in August 2015
Everything went as expected which is what you want when you call a plumber. I will use them again in the future for sure.
J&M Plumbing & Heating Inc
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Reviewed in February 2014
Discovered drainage pipes in basement were not replaced that needed replacement. This past winter our pipes froze that were not configured correctly. After remodeling first floor and having painted, ceiling started to leak where work was performed. I contacted him to fix and his response was...
Anchor Plumbing & Heating
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Reviewed in June 2010
The quality of work is fine, and he was punctual, polite and professional. My only complaint is that he charged his regular hourly rate for driving back and forth to the plumbing supply place to get things that I'd expect a plumber to have in his truck.
NORTH AMERICAN PLUMBING & HEATING CO
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Reviewed in October 2014
after using services twice; this plumbing service was good... but after acceptance of estimate, and scheduling of service; "First Response Plumbing"; was a NO SHOW , leaving us with an issue... since NO response by plumber was ever received until reconnected by cell #; plumber only then...
First Response Plumbing And Drain
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Reviewed in September 2018
When I removed the existing 1 piece fiberglass tub/shower and saw the existing plumbing exposed, I knew it required a plumber and not a DIY'er, however competent. First I called one of the large, very well know franchises, which dispatched a van within minutes to examine the job and the very...
Artisan Plumbing & Heating
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Reviewed in December 2013
Colonial was the original plumber hired for a variety of issues in this older, much added to house. Over time, Colonial became associated with various other plumbing firms, during which some confusion occurred over a particular club membership. Once this confusion was exposed, Colonial was the...
Colonial Plumbing & Heating Inc
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Reviewed in June 2015
Jason arrived within the hour promised, assessed the situation and completed the work in short order, no non-sense. He was professional and friendly. Had I known that he was the go to plumber in town I would have called on him for all my previous plumbing work. I have a few more things that...
Extra Time Enterprises LLC Plumbing & Heating
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Reviewed in April 2013
.I have used Miller Plumbing and heating for many years and for good reason. They are reliable and experienced and provide excellent service. I could probably save a few bucks using some cut-rate plumber but you get what you pay for. I know the job will be done promptly and correctly with...
Miller Plumbing & Heating LLC
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