Gardner and team did a great job replacing a water heater for us on short notice. Was able to get…read moreus hot water again on one days notice. They also replaced a shower faucet at the same time. Can't say enough good things about Johnson Plumbing. Quoted price was below the 3 others and job was done in about 3 hours. Super happy.

About 8 months ago I had another company come and replace a ring on a toilet, because I thought it…read morewas causing a stain on the ceiling beneath it. They had to come back because they didn't put the back piece of the toilet on correctly, it was rocking.They had to come back a third time because now there was a constant smell. They caulked around the toilet. For the next 7 months the smell would come back, sometimes a little, sometimes unbearable. BUT then I started getting little sewer flies. I was not calling them. I found Gardner Johnson on Yelp. It was a blessing. He listened. He looked. He fixed. The previous company had not set the ring correctly, and there was sewage literally sitting under my toilet. Anything you need plumbing wise, you would be wise to pick Johnson Plumbing. He also sent his assistant to help with another issue with my septic system. The assistant saved me at least a thousand dollars from a previous professional telling me what I needed to do. He showed me pictures proving it did not need to be done. They both were so professional, so great and they guarantee their work. But I am sure you will never .ever . have them come back for the same reason.

Work was done efficiently. Costed $650 for 20 minutes work and $75 in parts ( I looked it up )…read more This included the time to look at the job , quote it , do the work and pack the truck. It worked out to $800 an hour labor which was really a DIY job if you had the tools ( I didn't ) You get charged $99 for the quote if you don't have them do the work. I'm not sure if all plumbers have become this expensive but I'm sure willing to try someone else next time

4 adults and one infant living in a house with temp heat and hot water. We have been in this…read moresituation for close to 7 days. Can't shower or wash clothes.Cant wait to see electric bill They claim that they can't get part to repair this is I pay 180 $ a year to get preferred service. I just find this wait unacceptable what happened to overnite or next day service? Tell me where the part is and I'll go pick it up!!! I am not a happy customer

Joe got me a reasonable quote quickly. Came on a Saturday. That was appreciated since this job was…read morebecoming in blocker in the overall project. Joe installed a long gas line to supply a grill and a sunroom's gas fireplace. There were no issues and the work is complete.

Great communication skills, made an appointment in a timely manner, and accomplish the task he was…read morehired to do at the price he quoted.

Five stars to this company they saved our lives today had to call at 7am this morning with a backed…read moreup sink got a return call 15 minutes later with the time they were able to fit us in. When they arrived they diagnosed and fixed the issue quickly and thoroughly! Knock on wood we don't have another issue where we have to use them but if we did they'll be the first plumbing company we use! Thanks Londonderry Plumbing and Heating! Update 12/28 still would give a five star rating our hot water heater started leaking today gave them a call they were there to fix it right away great reliable company!

Rougly June of 2025 the came out to fix 2 6 - 7 inch pipes for my well to the well tank. $600.00…read moreand it still leaked then cane back and fixed 1 of the pipes and left. It still leaked called and said he'd come back that day and never showed up.

Shawn was great! Prompt, efficient and knew what he was doing! I would definitely recommend him!…read moreThank you!

Shawn was quick to reply to my call and was able to get me in his busy schedule quickly. He gave me…read morea quick analysis, got the parts and was quick to repair...

I have been using Southern NH for years. They are always so reliable and honest. I made the mistake…read moreof going with someone else when I was in a bind a year ago. I have regretted it every day. Southern NH came through for us and they were so accommodating. Great value and so friendly!

They gave a quick and reasonable quote, was prompt with their scheduling. Showed up on time and did…read morean excellent job. I converted from an oil boiler to a gas combi unit. They did not pressure me in any way just gave me all the options and answered any questions I had. The owner did the on site estimate and even showed up on day 1 to see if we had any questions. Steve and Shane handled the install and were prompt, responsible and knowledgeable. Highly recommend their service.

I needed a new furnace and when Bryan came to give a quote, he was prompt, courteous, and…read morepatiently answered all my questions. He was also great about encouraging me to do some research so I'd know better what I was getting. The price was excellent, and the work was done cleanly and efficiently. He then took time to show me everything and explain what he'd done. I was dreading this whole ordeal, and it was so easy - and the outcome was excellent. Highly recommend!!!!!!

During the 2023 polar vortex, at 1AM of course, our plumbing pipe burst sending water along the…read morewalls down 2 flights. Luckily we were home and cut the main water off but needed a plumber first thing in the morning on a Sunday. We were striking out. No calls back. Voicemails upon voicemails to several companies and local plumbers. We were fairly new to the home and area and did not establish any plumbing service with anyone. Some companies were only responding to established customers first. We found several people on social media (FB) had recommended David's Plumbing on local community pages. We gave it a try. He picked up but you can tell he was moving from job site to job site. He squeezed in a visit to our home that same day in the early afternoon. The pipe ran along a very poorly insulated and tight crawl space. In about an hour, the pipe was repaired. He released the air and pressure from the entire system. He examined the basement and the system. He tested and ensured all worked properly. David was kind, knowledgeable, and professional. He showed up in his company vehicle with everything needed to complete the job on site. We found his rate to be extremely reasonable given the repair, the location of the burst-pipe, and the same-day service call. We highly recommend David Plumbing and will be using him moving forward for all our plumbing needs. He is fully licensed and certified.

Connected new water softener and replaced water heater relief valve. Service was on time and done…read morewith a professional manner with quality workmanship. Reasonable priced for the job!

Kyle came out when he was supposed to be going home for the night and got the job done quickly at a…read morevery fair price. I hope he gets your business because he deserves it. I would not call anyone else. Very happy

Daigle Plumbing and Heating promised a full refund in the amount of $231.80 to me on 2/3/26 for the…read morecharge of the service call that did not fix the problem with my furnace. As of today, 2/17/26 I have not received the refund. I have reached out to Kaylee as to the status of the refund and have been told that the check has been cut and in the mail. I should have offered to go and pick the check up as Daigle Plumbing and Heating is less than 1 mile from where I reside. My next step is to contact the Consumer Protection Division of the State of New Hampshire and hopefully they will get involved.

We had Daigle install bathroom plumbing and fixtures. A couple of snafuus came about (no fault of…read moreDaigle) but they were very professional and fixed the problems created in the design. Very pleased with the customer service and the transparency. I must say, Jason, the project mgr was amazing and very responsive. I would definitely hire them again- already thinking of an upstairs bath remodel. Stay tuned