About Us
Demmis Plumbing
Your Local Plumber in Lemont, IL and Surrounding Areas
At Demmis Plumbing, we’re more than just a plumbing company – we’re a family-run business built on hard work, trust, and a passion for helping our neighbors in the Chicago Southwest suburbs. Founded over 25 years ago, Demmis Plumbing started with a simple mission: to provide reliable, high-quality plumbing services that homeowners can count on.
We’re committed to excellent customer service and offer competitive pricing. Contact us today for a free estimate!

Building Trust, One Plumbing Job at a Time
Over the years, we’ve become experts in all aspects of plumbing, from routine repairs to complex installations. Our commitment to learning and growing in the industry means we stay up to date on the latest techniques and technologies, ensuring we always deliver the best service possible.
What makes us proud? It’s the relationships we’ve built with our customers. We’ve seen homes through new installations, emergency repairs, and everything in between. When you call Demmis Plumbing, you’re not just getting a service – you’re getting a team that treats your home like our own.
We’re proud to be part of the Lemont, IL community and the Chicago Southwest suburbs, and we look forward to continuing to serve you for years to come. Whether it’s a minor repair or a major project, we’re here for all your plumbing needs.
Contact Demmis Plumbing Today! Call us at (630) 991-3641 to schedule an appointment.
24/7 Emergency Plumbing Services
Plumbing disasters don’t follow a schedule. That’s why Demmis Plumbing offers 24/7 emergency services. From burst pipes to overflowing toilets, our team is ready to resolve your plumbing crisis anytime, day or night. We’re committed to being there when you need us most.
Family Owned and Operated
Founded in 1999, Demmis Plumbing is a family-owned business proudly serving the Lemont, IL community and beyond. We share your values of hard work and dedication. Our expertise in plumbing sets us apart, allowing us to provide the exceptional service your home deserves.
Dedicated to Customer Satisfaction
Your satisfaction is our top priority. Demmis Plumbing sets high standards because we understand our job is to make you happy. From installations to repairs, our team delivers quality workmanship and personalized service. We’re not finished until the job is done right.
We Serve Lemont, IL and Surrounding Areas:
Contact us today at (630) 991-3641 or send us a SMS or a quick response.
We’re here to ensure your Lemont, IL home’s plumbing system functions optimally, giving you peace of mind and a comfortable living environment.
Demmis Plumbing is pleased to offer our services to residents in the following areas and beyond: Lemont, Homer Glen, Naperville, Downers Grove, La Grange, Palos Park, Darien, Palos Heights, Orland Park.
EXCELLENT Based on 153 reviews Julian Shah2025-09-25Trustindex verifies that the original source of the review is Google. Demmis plumbing was very good!…Alex was good at finding a resolution to the problem we were experiencing…I would use them again in the future. Velma McClelland2025-08-23Trustindex verifies that the original source of the review is Google. Great job repairing all my plumbing problems under my house. Quick response and courteous workers and very competitive price. Darnika Graham2025-08-17Trustindex verifies that the original source of the review is Google. Dermis plumbing came in 30 minutes on a Sunday and fixed our sewage issue! They even gave us excellent recommendations on how to prevent future issues! I highly recommend them and will be calling them for any other plumbing issues! Daniel Joyce2025-07-28Trustindex verifies that the original source of the review is Google. Demmis Plumbing has been great to me. From tankless water heaters to new fixtures and old utility tubs they have been the most efficient people ever. Always prompt and they communicate as well on other advice. C. Schillo2025-07-15Trustindex verifies that the original source of the review is Google. This is the second time they have answered our call- 2 different issues, and both times their response time was wildly fast and the job was done equally fast. Jodi Arrivi2025-07-15Trustindex verifies that the original source of the review is Google. Amazing customer service! Very reliable and would definitely recommend to anyone! Jeff Hoekstra2025-05-19Trustindex verifies that the original source of the review is Google. We've used Alex at Demmis Plumbing several times over the last couple of years. Called them early Sunday morning when our tankless hot water heater was not functioning properly. Alex was kind enough to call at 9am and walk us through hot to reset the system. Super professional and affordable! Highly recommend!!! M T2025-05-17Trustindex verifies that the original source of the review is Google. HIGHLY RECOMMENDED PLUMBER When we needed a plumber and started looking and found the Demmis Plumbing ad on the back of our church bulletin at St. Andrew in Romeoville, IL offering a parishioner discount. We have used their services twice. Once last year for some routine Faucet replacements and to change out the on/off valves beneath the sinks. Dan came out and accomplished the task. His skills as a Master Plumber are very evident! This week our water heater went out. Again Dan came out on the day we called and replaced our water heater with a brand new Bradford White unit within a few hours. Again excellent work on both occassions. Highly recommened and would positively use them again. Brooke Dhea2025-04-28Trustindex verifies that the original source of the review is Google. Dan came out to our place and did a great job! Fixed all of our plumbing needs and was very friendly and happy to do so. Demmis plumbing is our go to plumbing company from now on! Very reasonably priced as well. He fixed our clogged bathroom sink, Replaced our outdoor faucet, and Fixed another leaky faucet.