Up to $2650 in Manufacturer Rebates and Discounts
0% Financing for 72 months-No payments until 2028
Trusted Heating & Cooling Services in Round Rock, TX Since 1977
100% Satisfaction Guaranteed
STILL Locally Owned and Operated
0% financing for 72 Months with approved credit
Our Services
Heating
We offer heating services that keep your home warm and energy-efficient all winter long. Our team provides reliable solutions that ensure your system works smoothly. You can trust us to take care of all your heating needs with friendly, professional service.Heating Services
Air Conditioning
When it comes to cooling your home, McCullough Heating, Air Conditioning & Plumbing has you covered. Our experienced technicians are ready to handle all your cooling needs, keeping your home comfortable and energy-efficient even during the hottest months.Cooling Services
Home Energy Audits
For detailed home energy audits, rely on the experts at McCullough Heating, Air Conditioning & Plumbing. We’ll evaluate your home’s energy use, pinpoint areas to improve, and offer solutions to boost comfort while lowering your energy bills.Home Energy Services
Financing options available
We Live Here, We Give Here! Special financing for up to 6 years. Subject to credit approval.View Financing
Experience the McCullough Difference
More Than a Service Call—Comfort You Can Count On
Trusted Service Since 1977- Expert Installation & Quality Repairs
- Flexible Financing & Satisfaction Guarantee
- Reliable, Local, Transparent Service
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Don’t Miss Today’s Offers
Free 2nd Opinion on Repairs
Must have a recent quote from a licensed competitor
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Expires: 10/31/2026
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Contact Us
Quality Service Recognition by Leading Organizations
Proudly Serving Round Rock and the Surrounding Areas
Allandale- Anderson Mill
- Brentwood
- Courtyard
- Crestview
- Davenport
- Jollyville
- Oak Hill
- South Austin
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Join our maintenance plan
Ensure Your Equipment is running smoothly Year-RoundSee Our Maintenance Plans
WHAT YOUR NEIGHBORS ARE SAYING ABOUT US
3 days ago
Andrew McCoy
Sam came late, diagnosed the problem
4 days ago
Jeff Custer
Tech was friendly and professional. Checked out our heating system answered my questions. He also changed the filter and reset the filter reminder on thermostat.
4 days ago
Chelsea McCullough
McCullough Heating, Air Conditioning & Plumbing is my go-to choice - and not just because we share a name! (No relation, btw.)
Today one of the service personnel, Craig, came to make sure all systems were functioning. He was professional and went above and beyond to optimize both HVAC and heater were in top shape. I appreciate the thoroughness and I can rest assured I never have to worry. Highly recommend.
Today one of the service personnel, Craig, came to make sure all systems were functioning. He was professional and went above and beyond to optimize both HVAC and heater were in top shape. I appreciate the thoroughness and I can rest assured I never have to worry. Highly recommend.
4 days ago
Robert Ruiz
Great customer service and impressive knowledge of system
4 days ago
I M Czech
Santos pursued the problem which most people would have given up. Good work Santos.
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