Since 1973
50+ Years of Award Winning Service
We're Down the Street
Competitive Pricing
Five Star Certified Experts
24/7 Live Answering
Exceptional Service Is Always The Standard
If you want 100% reliable and guaranteed service, we ARE the PROVEN choice.
Not only are Cahill techs trained, experienced, knowledgeable... they're genuinely kind. And the hundreds of rave reviews from thrilled customers proves it.
HeatingWe service all brands, types, makes and models. We also wrap an extraordinary service experience around everything that we do.
Call Now
Air ConditioningCahill is the air conditioning company that can expertly maintain, repair, service or install ANY air conditioning system including ductless mini splits.
Call Now
BoilersCahill specializes in residential hot water boilers, including boilers with cast iron radiators and baseboard heating distribution systems.
Call NowElectricalOur team is made up of some of the most experienced and knowledgeable electricians in the Chicago suburbs. From electrical panel repair to generator installation, Cahill has you covered.
Call Now⭐⭐⭐⭐⭐
Google
I have used Cahill for the past 20 years. Would not think of anyone else for my HVAC needs.
⭐⭐⭐⭐⭐
Google
A locally owned business that puts the customer first. Always fair pricing. Great service.
⭐⭐⭐⭐⭐
Lake Forest
A friend who I trust recommended Cahill and I could not have been more impressed. From the initial call to the prompt service the whole process was very professional and efficient.
⭐⭐⭐⭐⭐
Lake Forest
A locally owned business that puts the customer first. Always on time. Always fair pricing. Great service.
⭐⭐⭐⭐⭐
Lake Forest
Quick to respond... honest service techs for a fair price
⭐⭐⭐⭐⭐
Lake Forest
Great service, friendly technicians. They are helpful and informative. Have relied on them for years.
⭐⭐⭐⭐⭐
Lake Forest
My dealings with those in the office and the installers were all very professional. Everyone was responsive to my questions. Very happy all around!
⭐⭐⭐⭐⭐
Lake Forest
Very pleased with the sales (Ken) and installation teams. Both were very professional and easy to work with. Price was very competitive! Installation team was quick, quiet, left property clean, very easy to have in the house and professional.
⭐⭐⭐⭐⭐
Lake Forest
Issues with a/c unit and a technician was dispatched immediately! Hayko was on time and responsive to the issues. He was able to fix it and get it up and running to great satisfaction. We have been using Cahill for years and would highly recommend!
Proudly Servicing The North Shore Since 1973
