2016 EBSCO Research Best Pick

Cosmos Marble & Granite

1st year as a Best Pick

  • A-Rated
  • Verified License(s)
  • Verified General Liability
  • Verified Workers' Comp

"Cosmos Marble & Granite is a family-owned company, and our goals are unsurpassed customer service and excellent craftsmanship. Our friendly staff and years of experience will leave you 100 percent satisfied with your project."

John Karagiorgos | Owner

Areas Served:

Montgomery County, Chester County, The Main Line, Bucks County, Delaware County

  • Services Offered
    Cosmos Marble & Granite fabricates and installs natural stone surfaces in kitchens, bathrooms, bars, fireplaces, apartment complexes, office buildings, restaurants, and other large venues. The company carries a full range of natural stone products such as granite, marble, onyx, quartz, soapstone, and quartzite in addition to a wide variety of tile selections.
  • Awards & Certifications
    Cosmos Marble & Granite is an EPA Lead-Safe Certified Firm.
  • Organizations
    The company is a member of the National Kitchen & Bath Association and the Home Builders Association of Bucks & Montgomery Counties.
  • Employee Information
    Employees drive marked vehicles and undergo background checks.
  • Product Information
    Cosmos Marble & Granite carries Cambria, Silestone, Caesarstone, HanStone, Zodiaq, Pental, Viatera, and Q-Stone products.
  • Licenses

Select Quotes from Customer Interviews

A selection of 50 homeowner reviews:


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They were really patient with me because I had to come back and forth a couple times. Unfortunately, they didn't have the granite I wanted. I had to settle for something different, but that's no fault of their own, and they had something that also worked. They came and installed it, did a beautiful job, and they were there if I needed them. They installed a granite countertop in my mom's kitchen with a 42-inch sink and a faucet. They get an A+.
They're doing some work for us which isn't done yet because we went out of town, but so far, they've done everything they said they would do. They've been on time and professional. The guy is extremely courteous, has explained everything to me, and cleans up. We're just waiting for the top now, assuming that it fits like it should, and then everything will be gravy. They're doing a vanity countertop for a bathroom. I'd give them an A at this point because it's been great.
They were very accurate and on time. They tried to work out the best way to fit our needs. They did a countertop for us, and I'd give them an A.
They're good, so I was satisfied with their work on the granite countertop on my kitchen. They get an A.
Everything was timely and conducted in a timely manner, and they did a good job. They did kitchen countertops for a U-shaped kitchen, so three large counters and a bar. Everything was precisely as we ordered it. They let us come and pick out the marble ourselves from the yard where they had them all outside. They were an A—no complaints.
I really enjoyed their turnaround time. They were really quick with getting out and actually installing the stone. They did a white quartzite countertop in the kitchen. I chose them because they were the closest company to me. We have recommended them to family and friends already, so hopefully they use them. I'd give them an A.
They were prompt when the guys came and did the job, and everything went smooth, so it was fine. They installed a granite countertop for me, and it looks fine, though the overall job's not done. Their work is done, but the project is still in progress. I would recommend Cosmos to family and friends, and I'd give them an A.
I had a positive experience with them.
They did a good job.
Everything was quick. The guy said he was going to come, and then he came exactly the same day. They came on time and did everything the same day, so they did a good job.

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