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Your Trusted Plumbing, HVAC & Remodeling Experts in Evanston
Since 1890, John J Cahill has been a family-owned and operated business dedicated to providing exceptional plumbing, heating, cooling, and remodeling services to the North Shore communities. Our team of certified union plumbers and pipefitters brings over a century of combined experience to every project, ensuring the highest standards of craftsmanship and customer satisfaction. We prioritize transparency, reliability, and personalized service, offering 24/7 emergency support and free estimates for all our services. Our commitment to quality is reflected in our long-standing reputation and the trust placed in us by generations of residential and commercial clients. From routine maintenance to complex system installations, we approach every task with the expertise and dedication that have defined our legacy.

Our showroom in Evanston allows clients to hand-select materials and fixtures, ensuring every project aligns with their unique vision and needs. We take pride in serving the community we call home, combining traditional values with modern solutions to meet the evolving demands of our customers. Our focus on innovation and efficiency extends to retrofitting vintage homes with advanced HVAC systems and designing functional, aesthetically pleasing kitchen and bathroom spaces. With a proven track record of exceeding expectations, we remain steadfast in our mission to deliver peace of mind through dependable, high-quality service. For over 135 years, our family has upheld a legacy of excellence, ensuring every client receives the security and comfort they deserve.
Services
Plumbing Services HVAC Repair Drain Cleaning Sump Pump Repair Bathroom Remodeling Kitchen Remodeling AC Installation Furnace Repair Water Heaters Emergency Plumbing
Highlights and features
  • We offer 24/7 emergency plumbing and HVAC services for urgent needs.
  • Our team consists of certified union plumbers and pipefitters with over 135 years of experience.
  • We provide free estimates for all plumbing, heating, cooling, and remodeling projects.
  • We specialize in retrofitting vintage homes with modern HVAC systems and energy-efficient solutions.
  • Our kitchen and bathroom remodeling services include personalized design consultations at our Evanston showroom.
What people say
Exceptional kitchen remodel Professionalism and responsiveness Modern HVAC systems Exceeded expectations Timely project completion
Services
Plumbing Services
Our licensed plumbers deliver comprehensive solutions for drain cleaning, sewer rodding, water heater installation, and emergency repairs. With expertise in residential and commercial systems, we ensure reliable, code-compliant plumbing for new builds and renovations. Our team prioritizes long-term durability and efficiency, using advanced techniques to minimize disruptions while maintaining safety and functionality.
HVAC Installation
We specialize in HVAC system design, installation, and maintenance for homes and businesses. From high-efficiency furnaces to ductless AC systems, our certified technicians optimize comfort and energy savings. Our services include annual tune-ups, emergency repairs, and custom solutions for retrofitting older properties with modern climate control technology.
Bathroom Remodeling
Our remodeling team creates functional, stylish bathrooms tailored to client preferences. Services include fixture selection, layout redesign, and full installations. We coordinate every detailfrom tile work to plumbing upgradesto ensure seamless execution. Clients benefit from personalized consultations at our Evanston showroom, where they can preview materials and finishes before construction begins.
Kitchen Remodeling
We transform kitchens with custom cabinetry, countertops, and appliance integration. Our process begins with a design consultation to align project goals with budget and space constraints. Clients choose fixtures and materials in our showroom, and our skilled craftsmen handle every phase of construction, ensuring minimal disruption and lasting value through quality workmanship.
Emergency Plumbing
Available 24 hours a day, our emergency plumbers address urgent issues like burst pipes, clogged drains, and water heater failures. We prioritize rapid response times to mitigate damage and restore functionality. With fully equipped service vehicles and experienced technicians, we resolve critical plumbing problems efficiently, even on weekends and holidays.
Questions
What services does John J. Cahill offer?
We provide plumbing, HVAC, drain cleaning, sump pump repair, bathroom/kitchen remodeling, and 24/7 emergency services for residential and commercial clients.
Do you serve areas outside Evanston?
Yes, we serve the entire North Shore region, including Skokie, Winnetka, Highland Park, and surrounding communities.
Are free estimates available?
Yes, we offer free, no-obligation estimates for all plumbing, heating, cooling, and remodeling projects.
Can I visit your showroom?
Our Evanston showroom is open Monday-Friday, 10 a.m. to 3 p.m., or by appointment for fixture and material selections.
What certifications do your technicians hold?
Our team includes certified union plumbers, pipefitters, and HVAC specialists with EPA and state licensing credentials.
Reviews (6)
Cindy S.
Jun 20, 2022 Report
Water Heater Install. I called around for a quote and Cahill was by far the cheapest (100s less than other places ). Some plumbing companies asked me questions such as how many stairs to water heater location, is it in a hard to reach area and so forth with it costing me more every time I answered yes. Cahill gave me a flat rate to replace my 21 yr old water heater. They honored that quote but a rusted valve needed replacing so I did have to pay extra for the valve.

The foreman and another employee came first thing in the morning, fixed everything fairly quickly and professionally. They never complained about the age of my water heater or rust or other things that occur with an old water heater. The only issue was the misinformation about payment. The office said I can pay the following week when they mail my bill but the foreman wanted a check in hand right after the job was finished. I would recommend having a check ready with full payment the day of install. Quality of install was above board and I would highly recommend them to install big ticket items.
Ronnie Dugan
Jun 07, 2022 Report
Excellent company but the rates they charge residential customers are too high. If you need a faucet changed or other relatively simple jobs like toilet replacement, go find another plumber or be prepared to drain your bank account. Too many good plumbers are charging sky high rates with Cahill leading the pack. That said, I use them regularly for other complex tasks which justifies their high rate.
Ric Beyer
Apr 25, 2022 Report
Called three companies, quickest reply. I new what I wanted he didn't have it, but had no problem getting it. Had a new hot water tank in less than 48 hours! Thanks John
Mark C.
Feb 08, 2022 Report
Quality work conducted fast and safely - replaced water heater and removed large tempering tank which was leaking - 24 hours from call
Ben E.
Nov 01, 2021 Report
Sometimes "playing plumber" doesn't work and you need a professional! Highly recommend John J Cahill of Evanston! Reliable! Trustworthy! And reasonably priced! (Yes, that's a tampon applicator that was flushed and wedged in the workings of the toilet!) - please visitors, only flush toilet paper! And respect the courtesy flush!
Amy Stockli
Aug 24, 2021 Report
Never again! Used Cahill for standard boiler maintenance, which included replacing the thermocouple, Dec 2019 @ cost of $350. All good. Had standard maintenance performed on the boiler again Jan 2021, again included replacing the thermocouple. This time the cost was $518! Less than 3 months later, we didn't have any heat. To have a Cahill service person come out it would be a brand new call and charge - even if it was the thermocouple that was just replaced 3 months earlier. CAHILL ONLY COVERS THEIR LABOR FOR 30 DAYS! Insane!

I used a competitor and sure enough it was the thermocouple. There are way too many other options in the market than to go with this one who is not only one of the costliest but also doesn't stand behind their work.