01
Tier 01 · Learn
Est. 1958 · East Troy, WI
Three generationsof pure comfort.
One family-owned name for every essential system under your roof — plumbing, heating, cooling, water and electrical. Caring for Wisconsin lake-country families since 1958.
PlumbingHeatingCoolingElectrical
Licensed, Bonded & Insured · LIC# 230734 24/7 Emergency Service
Est.1958
The O'Leary Promise
- Free installation estimates
- Up-front, honest pricing
- Three generations of know-how
1958Established
3Generations Family-Owned
4Trades Under One Roof
24/7Emergency Service
Our Trades
All Services Four trades, one family name.
From a dripping faucet to a no-heat night, a panel upgrade to cleaner water — our licensed crews handle every essential system in your home, so you only need one number.
01Plumbing
Drain cleaning, repiping, leak detection, fixtures, water heaters, well pumps and emergency repairs.
Learn More
02Heating
Furnace, boiler, heat pump and radiant in-floor systems installed, serviced and repaired for our cold Wisconsin winters.
Learn More03
Cooling
AC install, repair and high-velocity comfort — plus maintenance plans to keep you cool all summer.
Learn More
04Electrical
Panel upgrades, generators, EV chargers, dock & pier wiring, inspections and whole-home repairs.
Learn More
05Water Quality
Softeners, iron filtration, reverse-osmosis drinking water and UV systems for cleaner water.
Learn More
06Drain & Sewer
Camera-guided drain cleaning, sewer clearing, and clog diagnostics for stubborn backups.
Learn More
07Water Heaters
Tank, tankless, hybrid and heat-pump water heaters — repaired or replaced, often same day.
Learn MoreThe O'Leary Standard
What's essential to you is essential to us.
Heat in January. Water you can trust. Power that stays on. These aren't luxuries — they're the systems your family relies on every day. O'Leary Plumbing, Heating & Electrical was built to keep all of them running, with the care you'd expect from neighbors who've lived here for three generations.
"For three generations we've treated every home in our lake-country communities like our own. Plumbing, heating, cooling, water and electrical — what's essential to you is essential to us."
01
One Family, Every System
Plumbing, heating, cooling, water and electrical — all from the same trusted crew. One call covers the whole house, no juggling contractors.
02
Three Generations of Know-How
Since 1958, the O'Leary name has been handed down with the trade. Decades of local experience on Wisconsin's homes, wells, and lake-country systems.
03
Honest, Up-Front Pricing
Free installation estimates and clear pricing before we begin. We explain the options in plain language so you decide with confidence.
04
We Stand Behind Our Work
Licensed, bonded and insured. We treat your home like our own — clean, on time, and there 24/7 when an emergency can't wait.
The Visit
Simple, honest, and on time.
Four clear steps from problem to solved — no pressure, no surprises, no runaround.
1
Call or Request Online
Reach a real, friendly O'Leary team member — even after hours. We'll get you on the schedule, often same day.
2
Diagnose & Estimate
A licensed technician inspects the issue, explains it plainly, and gives you clear options. Free installation estimates, always.
3
Fixed Right, Once
You choose the path; we do the work cleanly and correctly the first time — respecting your home and your time.
4
Stand Behind It
We walk you through what we did, tidy up, and back our work. If something's not right, we make it right.
Tell us what's going on
What's going on at your place?
Tap the glowing dots on the home to add what you're dealing with. We'll get the right tech rolling — plumbing, heating, electrical, or water quality. Three generations of East Troy, WI families have trusted us with the call.
Tap as many as apply. You can add details below.
Your list
Tap the glowing dots on the home to add what's going on. You can pick as many as you need.
Contact Us
Or call (262) 642-7747
1958Established
Our StoryOur Family Story
A family name you can knock on.
It started in 1958 with a simple promise: take care of your neighbors like family. 3 generations later, O'Leary Plumbing, Heating & Electrical still answers the phone in East Troy — now caring for plumbing, heating, cooling, water and electrical systems across Wisconsin's lake country.
"What's Essential to You is Essential to Us"
Family-Owned & Operated
3 Generations Strong
Licensed, Bonded & Insured
What we promise
Three guarantees. In writing.
We back the work three ways — your equipment, your time, and your home.
Pay Online
Pay your bill in a minute.
Already an O'Leary customer? Settle an invoice securely through our Clover payment page — no phone tag, no waiting on hold.
Secure Clover checkout Invoices & balances Also under Resources → Pay Now
Plans & Financing
Comfort you can budget for.
Big repair or a planned upgrade? Flexible financing keeps a new furnace, water heater or panel manageable — and our maintenance plans head off the surprises before they start.
Flexible monthly payments Fast, simple approval Annual tune-up plans
Learning Center
Learn. Compare. Act.
A new HVAC system, a panel upgrade, or a whole-home water-quality job will cost you thousands of dollars. We wrote these articles so you'll walk into that decision knowing what to look for, what to ask, and what a fair price actually looks like. Three generations of O'Leary tradespeople. Plain English. No upsell.
02
Tier 02 · Compare
Side-by-side breakdowns that turn “which one should I get?” into a clear choice.
Sample articleHeat pump vs furnace in Wisconsin winters →
Compare systems03
Tier 03 · Act
When you’re ready to move forward — what a visit looks like and how to recognize a fair quote.
Sample articleShould I get a second opinion on my HVAC quote? →
Take actionThree generations of O'Leary tradespeople, distilled into articles you can read in a coffee break.
Browse the Learning CenterWord of Mouth
Trusted across the lake country.
For three generations, our best advertising has been a neighbor telling a neighbor.
"We live in Elkhorn — if you have any plumbing issues call O'Leary's and ask for Nick R. Nick was extremely professional. You're in good hands with Nick — I highly recommend for any plumbing needs."
"O'Leary installed the original plumbing and septic system to my home back in the early 80's. I've lived in this home since — I recommend O'Leary for any plumbing job."
"Called yesterday and Dan and Ryan came promptly today! My water heater was leaking pretty bad and they replaced it. After all the work was done they cleaned everything up perfectly."
"Great, prompt service. Called in the morning and Nathan arrived early afternoon. Very knowledgeable and courteous. We've used O'Leary before and would definitely use them again — highest recommendation."
"The biggest snow fall this year, and the well pump decided to quit! Nick and Jacob arrived on time — didn't even flinch about the conditions. A big thank you for the wonderful and efficient service!"
"Outstanding service. Notified me when he was on the way. Analyzed the problem with my basement pump and fixed the problem in one visit."
"Ryan Williams was a star and fixed our plumbing conundrum! Will use O'Leary again if we have other plumbing issues. Thanks O'Leary!"
Did we take care of you? Help your neighbors find us.
A quick review on Google is the kindest thing a customer can do for a third-generation family business.
Opens in a new tab. 4.9 stars · 1600+ reviews.
Where We Work
Caring for Wisconsin's lake country.
From our shop in East Troy out across Walworth, Waukesha and Racine County — if you're near the lakes, we're already in your neighborhood.
East TroyLake GenevaMukwonagoElkhornFontanaDelavanBurlingtonWilliams BayWaterfordEagleWhitewaterPalmyraTichiganWind LakeBig BendMuskegoNorth PrairieDousman
Don't see your town? Call (262) 642-7747 — we likely serve it.
Pure Comfort Since 1958
One call for every essential system.
Call O'Leary or request service online and a real team member will help you schedule. Free installation estimates and 24/7 emergency service across East Troy, WI and the surrounding lake country.
Licensed, Bonded & Insured 24/7 Emergency Service