Onze Southern Connecticut Plumbing & Heating

Jason and Will are a pleasure to work with. They are very knowledgeable and professional. They go above and beyond. They have done several jobs for my business as well as my home and I am always satisfied. Can not go wrong with this company! I have worked with many contractors being in property management and this company has been the best by far. You cannot go wrong with them!

Jason and Rob were both great, they installed a waterline to the fridge and updated my laundry hookups as well as other plumbing tasks around the house.
Jason provided me with referrals for other work I needed done around the house.
I recommend Onze plumbing services and will use them in the future. You’ll get what you pay for when you use this company.

SCPH helped us with multiple plumbing issues throughout our home as well as working with us on a major master bath remodel. They have always been prompt, reasonably priced, extremely professional and kind. We will continue to use SCPH for our plumbing and heating needs because of their impeccable customer service and quality work! William is the most knowledgeable contractor we have ever worked with and we cannot recommend this company more highly!

I had a shower leak on the verge of causing serious damage, Onze Plumbing sent Rob to my home ASAP and I couldn't be any more pleased. Professional from the moment he arrived, until he left. My shower was fixed 100% and bathroom was left spotless. Highly recommend and will be my go to plumbing/heating company. A+++

We have had Onze SCPH do many jobs in our home. The crew they have is top notch. They are a clean, honest and reliable company, and we couldn’t recommend them enough!

My home is 80 years old and was long overdue for an upgrade to its mechanics. I did my research and developed a basic idea for how I wanted to convert the home from oil to gas, upgrade the electric to a 200 amp panel and add central a/c. The gas company had at some point provided me with a list of approved contractors. I shopped around and if the contractor even showed up to the appointment there was always something that wasn't right, some were shady, most gave me prices that were 2x - 3x what they should have been and a few low balled the hell out of me but had in their proposal a clause for unforeseen charges which left it wide open for me to get hit with huge "extra costs". I was then referred to Onze Southern CT. I called and left a message, almost immediately Jim Onze called me back, this really caught my attention as every single other company took days to reply, and again if they even called back or showed up. I told Jim I knew exactly what I wanted and he stopped me and said how do you know. After a brief conversation he asked if he could come look at the project area and if it was ok with me he would like to show me three different options for the project. I agreed and we set an appointment.

Jim Onze showed up on time for the appointment, not only that he showed up early throughout the entire project to ensure everything went smooth. Just as he said he would he provided me with three options that would fit what the home needed. He took the time to explain each and walk me through the benefits and advantages of each system. We agreed on what we would install and began to move forward with the gas company installing the line from the street. Jim provided me with advice and guidance the entire way, in fact he saved me over $1,000 with the gas company at one point.

In searching for an electrician and an hvac company I experienced the same thing, they wouldn't show up, they seemed shady or were rip off artists. I told this to Jim and just how exasperated I was feeling with this and he offered two referrals to me, and as you would expect the electric and hvac companies that he turned me on to were of the same caliber as Onze Plumbing, offered advice, guidance and mapped out the perfect plan to complete the project.

I now have a completed system installed that upgraded all the major points for heating and cooling in the home plus I can install a home generator and gas range in the kitchen with ease from pre planning the lines we ran.

Onze is a family owned business, all of their employees were the most professional I have worked with on this or any home I have ever owned. The price was not the cheapest for this project but it was not the most expensive, this is the perfect example of you get what you pay for. The professionalism, advice, guidance and dedication to customer service is five stars. I appreciate everything Jim Onze, his son and employees did to complete this project to perfection. I recommend this company above any other.

The guys did an amazing job on two full bathroom remodels. They demoed all of the old plumbing and replaced with all mew lines, drains and fixtures! Can’t wait for Jay to do my kitchen next!

Great place to work and we have an amazing team that cares about every project we get to work on

I had to replace multiple burst baseboards in my home and Onze Plumbing did a fantastic job.

After calling around for estimates, almost every company kept trying to upsell me services or gave me high ball estimates. Finally, a friend referred me to Onze. Jim, Jason, and the rest of the team were honest, friendly, responsive, and did a great job. I will be using them again for future plumbing needs.

Onze Plumbing replumbed our bathroom which is being renovated. They were very professional and efficient. Would highly recommend them.

These guys are fantastic! James did a natural gas conversion for me and helped me renovate my kitchen and half bath this past year. Both times He and Sons were excellent to work with. Their work was clean, efficient and fairly priced.

They were always friendly and easy to talk to and work with. I highly recommend their work for any level of construction or renovation.

We just moved into a new house that needed a lot of plumbing repairs done and Jason Onze did an amazing job in a short amount of time so that everything works perfectly. They also put in a new heating system in one day and it was seamless. We are happy to recommend Onze Plumbing and will call them for any future issues.

I highly recommend James Onze Plumbing & Heating. Jim and his sons have now completed two majors projects for us, and conduct yearly maintenance on our new boiler system. For the first project, Jim installed a brand new, high efficiency, direct venting boiler system in our home when we purchased it. Most recently, Jim ran the plumbing for a new half bathroom that we added. In both cases, Jim and his sons are responsive, reliable, efficient, incredibly neat, and effective. The work they do is nothing short of beautiful (we often take guests down to the basement just to check out our new boiler). Perhaps best of all, whenever I have an issue, I can call or text Jim and he's immediately responsive. I don't think I've waited more than a day for someone to come by the house when we need something. And for the larger projects, not more than a week. Above all, everyone I've interacted with from the Onze business have conducted themselves with the highest standard of professionalism and integrity. Highly recommend!

If I could give them more than 5 stars I would! I needed a new boiler in my home, and I contacted a number of different companies to figure out the best way to replace the old boiler. I spoke with small, medium and large sized firms and received a number of proposals. The Onze proposal was by far the best, not only in terms of price, but was also delivered very quickly and was well thought out. They then followed through and completed the job very efficiently and seamlessly as the new boiler meshed right in with my existing heating system. I was so impressed with their work that I am discussing doing additional work to my home’s plumbing and heating system with them. Overall, they exhibited excellent workmanship, fair pricing and pride in a job well done. I highly recommend them to others who are looking for high quality heating and plumbing work done to their home or business.

Onze Plumbing & Heating does quality work. From meeting the owner Jim and how he explained the whole process from the removal of the oil tank, water heater and oil burner was very good. I also like the way his crew with the leadership of his son worked. Two of them showed up at 7:30am to start disconnecting the old heating system and a few hours later 2 more showed up to start removal from the basement and start the installation. It was pouring rain that day and they kept on top of cleaning up as they progressed. The last 2 guys showed up to install the exhaust and intake for the system. I was really impressed with how these guys worked as a team. They were finished in about 12 hours. Jim came back to go over the operation with me and show me how to increase the hot water. He also told me if I had any problems don't hesitate to call him directly. Overall I would give them a 10 for total customer satisfaction.

Jim Onze and his team have been amazing from start to finish - we had a lot of corroded pipes that needed to be removed from a small underground crawlspace. Onze provided a quote quickly, and once we started the project, addressed everything swiftly. When we had follow-up questions, Onze responded right away and helped us resolve our issues, going above and beyond. The work was great and customer service incredibly appreciated!

When I called Jim Onze he was able to provide same day service. Within an hour of my call his son Jason arrived to repair my hot water issue. Jason did excellent work. Definitely will be using Jim and his team for future work. I highly recommend them.

We’ve used James Onze for several years and it’s consistently been a great experience. Service is punctual and the work is fastidious. Onze performs regular maintenance on our home, answers emergency calls, and done new work on an extensive remodel. Mr Jim has gotten on the phone with us to help us troubleshoot an issue on a Friday night before a summer holiday weekend and once on New Year’s Day. He and Jason have promptly replied to our service calls on weekends. Not that things always go wrong with our system—far from it— but when issues do turn up occasionally, we can always count on Onze to help.

This is a family business in the best and truest sense of the word. Kind and professional. We wouldn’t think of using anyone else.

Onze plumbing provides excellent service, going above and beyond in answering questions and responding to the various plumbing issues around our house. They were very knowledgeable, very helpful, and fixed all our problems without any issues at all. We highly recommend Onze and will be calling on them again.

We have used James Onze Plumbing and Heating to tackle our new home reno this year. We took on a major master bathroom & kitchen renovation and I could not thank this company more for their professionalism/work ethic/ & skills in order to turn my house projects into everything I envisioned it would be, not to mention how quickly yet carefully they get the job done. I would definitely recommend them for all your plumbing and heating needs!