A Top Rated Plumbing & Heating Company

Serving Milford and all of New Haven and Fairfield Counties in Connecticut

Providing fully licensed and insured plumbing & heating services

1000s of customers served since 1989

Plumbing Services

Plumbing repair and installation. Ask us about hot water heater installations!

Heating Services

Oil to gas conversion specialist serving Fairfield and New Haven counties

Got a plumbing or heating problem?

Call us and join the thousands of other customers who have found a plumber they can trust with their repairs, renovations, home improvements and a whole lot more.

We’d be happy to speak to you to discuss the help you need..

After hours and weekend emergency service available to all our PSA members

How To Become a PSA Member

With a PSA you receive

Annual plumbing system inspections
Documenting of each fixture and component
PSA reports that outline upcoming repair needs
Access to after hours emergency services
Call our office to become a member: (203) 876-7875

Top rated in all of New Haven and Fairfield Counties

Read what some of our past plumbing and heating customers say about us

4.9

Jason was an absolute pleasure to deal with. I had an emergency gas leak. Called him on a recommendation and he was at my house in 12 minutes! Work was priced very fairly. I appreciate the quick and professional service. Highly recommend

kevin S.

I had an excellent experience with Onze Southern Connecticut Plumbing & Heating when they repaired my Navien water heater combi unit. From the start, their communication was clear and professional. They demonstrated strong knowledge of the system and provided upfront details about the cost no surprises.The service was completed in a timely manner, and they went above and beyond by educating me on how the system works and how to maintain it. I really appreciated how friendly and respectful they were throughout the process and they left the work area spotless!It was truly a pleasure working with them. Highly recommend if you’re looking for reliable, honest, and knowledgeable plumbing and heating professionals.

rasheen T.

My experience with your technician, David, was great. He was really nice, clean working, efficient. He completed the job. Restored all plumbing issues to good working condition. So glad I found Onze. Thank you.

jessica K.

Both the plumbers and the electrician that I needed were extremely professional and punctual. Couldn’t have been any better!

Randy O.

Great customer service and knowledgeable employees who truly care!

Gabrielle H.

Always receive prompt, courteous and competent service from Onze team. Happy to refer friends and neighbors. Excellent pricing and work is done right--the first time.

Linda I.

My water heater developed a leak and I was in rush to get the new one in. The entire team at Onze from quoting to scheduling to installation were fantastic and the even managed to fit me in quicker than promised. I highly recommend them!

Tom C.

Dave was professional and very detail oriented!

Indrani D.

Exceptional service from Jason and Dave. Diagnosed the problem, contacted a manufacturer to find out about a warranty, and fixed the issue. All done efficiently and with kindness! Highly recommend!

Bonnie R.

Jason and his team were highly responsive, generous with their time in explaining things and overall very thorough with their work. I would recommend them to anyone looking for a solid partner for plumbing needs.

Alex C.

Excellent service, timely, responsive, show up and get things done efficiently. Services span from installation and servicing of high efficiency gas boiler to general plumbing services (leaky toilets + faucets). One stop shop!

Joe F.

Jim and Jason have helped us out a lot with time sensitive work. They have been very reliable and responsive. Pleasure to work with.

Douglas P.

late afternoon and I discovered my hot water tank was leaking. I called Onze. fast forward, they were here within the hour with a new tank. Installed and very satisfied.They also discovered a BIG problem that they came back to fix. Whew. A very lucky find by them. and, a reasonable fix.Call Onze SCPH for any plumbing needs.

Mark C.

Great company. Have used there services many times. They are very professional and have fixed my issues in a timely manner. Would recommend there services to anyone.

Bill V.

Onze is the best, most reliable plumbing group around. Plain spoken - not ultra sales oriented, but gives options. We trust them 100%. Great group.

Jan C.

Very helpful, gave us more detail on our furnace than the person who installed it. Very easy to work with, knowledgeable on the furnace. Made sure we had hot water till he could get a part to finish the job. Time frame to get a part is very reasonable. Would definitely recommend this company. we are staying with them.

Linda T.

Fixed my heating issues the day after I called, quoted accurately, and did a professional job. Will definitely use them in the future.

Darrin L.

Will and staff were really responsive and super professional. They had great communication throughout our commercial project. They were punctual and detail oriented. Very knowledgable when it came to our dental project.

Matt R.

Problem solved! Dave was very helpful and was able to troubleshoot the situation and resolve it.

Fernando T.

I needed some modifications to a drain and water lines for a remodeled bathroom. I called Onze Plumbing and Heating due to recommendations from colleagues. I spoke to Will. He understood exactly what i needed and had a couple of solutions immediately and said he would be sending out a guy next day. Rob from Onze Plumbing came out next day, on time, and got the job done immediately. They recognized my problem and fixed it accordingly. I will call them for all my plumbing and heating from now on. Great pricing.

Jeannie D.

Jason has always addressed my concerns.. I am happy with this company. I did an oil to gas conversion years ago. I have had several issues with another company. When I reached out to Jim and Jason, I have not had any issues..

Elaine B.

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!

Kaylee C.

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!

Zach

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

Teri L.

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!

Amy W.

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!

Jacob D.

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+++

Jason C.

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.

Nikhil R.

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.

Oscar P.

Very helpful and responsive with reasonable pricing. Thanks!

Caitlin D.

Excellent service very professional and timely. The crew was very polite and meticulous in their installation. The company worked with us on timing to coordinate removal of scrap in as little time as possible.

Andre P.

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.

Nina S.

I have only great things to say. Professional, knowledgeable and affordable. Great family owned company that I have used more than once.Highly recommend.

Paul K.

Always professional, competant, friendly, clean, responsive and great to work with. I also love how they are always making good use of the latest technology, both in their systems and their communications & admin. Onze runs an impressively progressive business!

Michelle B.

Our job was not an easy one and two companies before hiring Onze had come up short. Jim Onze and team went above and beyond to help us and my only regret is we didn't talk to them first.

Andrew G.

Onze has completed several jobs for me over the years. Always high quality work from a reliable, on-time, responsive team.

Wayne C.

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 P.

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.

MiKel C

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.

Ellen H.

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Why Customers Refer our Plumbing Services

Onze Plumbing is built on solid referrals from customers in Milford and the surrounding areas. Our family plumbers are trusted among residential and trade businesses alike.

At Onze Plumbing and Heating we want to help our customers to resolve their plumbing and heating issues. When we send a plumber to a customer’s home or business, their goal is complete satisfaction. We’ll always take the time to listen to your concerns and offer our suggestions backed by our many years of experience. Read our many Home Advisor reviews to see how customers agree that we always offer the best customer service.

After hours and weekend emergency service available to all our PSA members