Grandmark Service Company specializes in providing complete home & business roofing, air conditioning & energy services. The company was started by two brothers, who were experts in the industry, and saw the need for companies to provide all of the installation needs without having to subcontract out jobs.

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Air Conditioning


Energy Improvements

Insulation & More

We know that you have a lot of options among roofing contractors. Despite the variety of choices, one company of professional roofers stands head and shoulders above the rest. At Grandmark Service Company, a few distinct qualities set us apart.

Emphasis on Energy Efficiency: We place a major emphasis on the improvement of a home or business’s energy efficiency. Our roofing practices reflect this, as does our expertise with the design and installation of solar panel systems. Furthermore, we offer a range of additional services, all of which improve your home’s comfort while lessening its carbon footprint. These include attic insulation, window replacement, and HVAC services.

Cutting Edge Technology: We take our work seriously, especially when it comes to energy efficiency improvements. Whenever new technology appears, we incorporate it into our services. Bottom line, you can always count on cutting-edge technology and techniques when you work with Grandmark Service Company.


Book a consultation with our expert comfort advisors and let the rest to our awesome team.


Your HVAC likely accounts for about 70 percent of your home’s energy usage. Naturally, its components thus become perfect candidates for optimized energy efficiency. Attic insulation can have a dramatic effect on energy retention, and can also make your home more comfortable. As for air conditioners, we can both service and repair existing systems, and install new, energy efficient machines for any home.


HVAC installation is a complex process that requires the expertise of a trained professional. HVAC contractors are familiar with the various types of HVAC systems and can help you select the best system for your home or business. They will also know how to properly install the system and ensure that it is operating at peak efficiency. When choosing an HVAC contractor, be sure to ask for references and check their credentials. Make sure that they are licensed and insured, and have experience with the type of HVAC system you are interested in. HVAC contractors can make all the difference in ensuring that your HVAC system is installed correctly and operates efficiently. Choose wisely and your HVAC system will provide years of comfortable heating and cooling.

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  • I recently used Grandmark Service Company for a roofing repair project and new ductwork for my central air and heat unit. Two new solar light tubes and two exterior roofing vents for my whole house fan. First Grandmark was quick in sending out a Technologist to assess my roofing repair. The repair was done in a very professional manner with special attention paid to a down spout. I can't thank that tech enough for the excellent work and attention to detail. I then decided upon inspection of my existing ductwork to have it replaced. Again, the crew removed all the old ductwork out the top of the attic where the new exterior vents would be placed saving me a ton of clean up. Throughout this process they provided tarps on the floor and did a thorough clean up at the end of the day's work. All crew member's were professional and friendly and answered any questions. If I could I would give them ten stars. But for this review five stars will have to do. Again, thank you Grandmark service company. I won't hesitate to use you again should the need arrive.

    thumb John Ruch
    November 26, 2022

    Recently moved to the central valley, got 3 quotes from other companies that were way over priced. They finished the job in less than two weeks. Highly recommend this crew..will be using them for solar install in the future

    thumb Ruben Hernandez Avina
    November 19, 2022
  • Tony Arevalo was very professional and helpful. Grand mark service is awesome. Best experience I have had with HVAC so far.

    thumb nike omijori
    November 10, 2022

    Tony very professional. We we very pleased and estacic with everything Tony did for us.

    thumb Albert Scott
    November 10, 2022

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