Trusted Heating & Cooling Services in Round Rock, TX Since 1977

100% Satisfaction Guaranteed
STILL Locally Owned and Operated
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512-280-0011
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.

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.

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.

Financing options available

We Live Here, We Give Here! Special financing for up to 6 years. Subject to credit approval.
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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

$100 OFF
on your next repair
New Customers Only. Minimum Repair total of $500 required.
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Expires: 9/30/2026

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Quality Service Recognition by Leading Organizations

Proudly Serving Round Rock and the Surrounding Areas

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Join our maintenance plan

Ensure Your Equipment is running smoothly Year-Round
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WHAT YOUR NEIGHBORS ARE SAYING ABOUT US

2 days ago
Katharine Benningfield
Thomas C. was super helpful getting our service done. We really appreciate how wonderful and professional this team is!
2 days ago
Barbara Klayman
very efficient, knowledgeable, wonderful service, highly recommend them, service technician fabulous
2 days ago
Steve Nied
Guillermo Mata fixed the problem with my AC. He was great!
2 days ago
Samantha Ruezga
Raul was wonderful! Very quick to diagnose and fix the issue!!
3 days ago
Maggie Hotard
Matej from McCullough Plumbing was professional, punctual, and efficient. He got the work done in a timely manner and kept us updated throughout the process. We appreciated the clear communication and would definitely recommend him.
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