For over 25 years as Hanford CA premier roofers, Grandmark Service Company, have been the Hanford and surrounding areas go-to source for all their professional roofing needs. In recent years, due to the increasing demand from Hanford residents for ethical and high quality HVAC services, Grandmark Service Company has expanded their services to include high-end air conditioning installations as well.

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Claim Your Free Estimate Today!

Financing Available 18 Months No Payments No Interest.


Hanford homeowners have a trusted source for reliable roof repair solutions with our team. From shingle and tile repairs to flat commercial roofs, no job is too big or too small for us. We understand how important it is to have a secure roof over your head, which is why we provide free roof estimate services to make sure you can get your roof repaired without worry. Our Hanford roof repair team are dedicated to providing customers with quality work and excellent customer service, ensuring that the job is done properly. So for all your roof repair needs in Hanford, contact us today!


At Grandmark Service Company, we specialize in all types of roof installations, from asphalt shingle roofs to flat commercial roofs. No matter what type of roof you need, our experienced team has the expertise and knowledge to get the job done right.


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Homeowners investing in a new roof can rest assured knowing that the installation process is being handled safely and professionally by our team of experienced contractors. As certified Hanford roof installation specialists, we take great pride in our ability to complete each job to the highest level of quality, fully compliant with the manufacturer's specifications. Our work not only looks great and provides added protection against the elements, but also offers enhanced peace of mind and security. Our commitment to excellence is evident in every Hanford roof installation project we execute, and we are dedicated to helping you get the most out of your investment.


At Grandmark Service Company, we strive to provide our customers with the best service possible. We recognize that, at the end of the day, it is our ethics and commitment to quality customer service that sets us apart from other companies. Our team takes pride in what we do, understanding that every customer interaction has a lasting impact. We want every customer to know that Grandmark Service Company is there during and after the project—we are true partners who genuinely care about each individual job. At Grandmark Service Company, we exist because of our customers, and it is our mission to ensure that each person we come into contact with benefits from our services.

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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


Grandmark was founded by 2 brothers that started in the business when teenagers. Today our family has grown to several locations throughout California due to the support of our customers and hard work of our team members.



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