I recently (10/23) was in the market for quartz countertops for my new kitchen. My GC recommended a source from which I received an estimate that I thought was high. As a check on that first estimate I went to a source that I knew would likely be the "high end" and likely even more expensive. I was right as they were 10% higher. So I initiated an on-line search and found Gran Marb which apparently had many 5-star Yelp ratings. Shortly thereafter I visited their facility and spoke with Christina. While we were going over my sketches her husband Giovanni, who apparently handles the technical end of things, came to ask Christina something and joined the conversation. A very comfortable discussion led to a third estimate which was 10% less expensive than my GC's recommended source and 20% less expensive than my second "high end" number. In spite of the less expensive number it appeared to me that their process was every bit equal to the other two sources I had solicited. So we arranged for Frank their official measurer to come to my home ASAP. Frank arrived right on schedule, did his "thing", took my deposit check and was gone. A week or so later I was in the area and stopped by Gran Marb to check on progress. They had received my chosen slabs the previous day and, with me having to be away the following week, scheduled the installation for the day after me return. Installation was again per schedule and uneventful. The countertops are beautiful and fit perfectly. The three-man installation crew were efficient and delightful to deal with. I wholeheartedly recommend Gran Marb. From what I saw of their facility, especially the slab pre-fab holding area, it is not a small company but has a small family-friendly company feel and offers every service of the other two suppliers who provided estimates. The one recommendation I would make is to decide on what quartz you want before visiting as their showroom isn't huge and fancy. While they do have some samples, knowing what you want before- hand just makes the process so much smoother. Thank you Christina and Giovanni for a job well done. read more

I used Gran Marb for fabrication for my kitchen countertop and backsplash. They never finished the job. Very hard to get in touch with personnel. Christina who I communicated was most of the time unresponsive and unaccommodative, always avoid your calls. Service that fails to meet the clients' expectations. Never will do busines with this shop and will never refer any new clients. read more

We ordered our Cambria counter top from GranMarb back in April 2024. The counter top is beautiful and the install went perfect . The reason for my rating now is that we've gotten some chips in the counter top and when we purchased it we had been told that Cambria guarantees the countertop for life. So we went ahead and contacted Christina from GranMarb . We actually placed quite a few calls into GranMarb and spoke to Christina 3 times . We also left quite a few messages on the machine in between the phone convarsations and never received any calls back . As of today, July 15th we've heard nothing back from them . Our first contact to Christina to have the counter top repaired was June 25th. The last time we spoke to Christina, she said she had emailed and contacted Cambria and had not heard back from them. That was about two weeks ago. So we decided to contact Cambria directly. Within two days, we had the repair person from Cambria at our house, fixing the countertop chips. They also told us that they have had no contact with Christina from GranMarb. Which makes me feel that Christina from GranMarb never even tried to contact Cambria. It does not put a good taste in my mouth, knowing that after we purchased the countertop and GranMarb was paid that they could care less about their customers . Just so others know to be aware of how they treat their customers . read more

I feel so fortunate to have found GranMarb. I'd gotten 2 high quotes from fabricators and investigated alternative providers. GranMarb was very highly rated online and for good reason. The owners are incredibly responsive, personable, personable & thorough. Christina recommended a list of places to shop for stone slabs. When I found what I wanted, she arranged for a senior sales rep at the yard to inspect the slabs to ensure high quality. Gio personally cuts all of the slabs and I couldn't be happier with the results. I plan to recommend them to everyone I know! read more

I would not hesitate to recommend Giovanni, Christina and Tom from Granmarb to anyone looking for fabricators for their countertops! Not only were their price very reasonable, they were very flexible about the process and very accommodating. I had an issue of not being sure about having enough material for my countertops. Granmarb was willing to work with me to see if I had enough material before purchasing an extra slab. The whole process was flawless and the quality countertops are second to none. I have three small seams you can barely see, and Giovanni worked with me to ensure that the very best parts of the stone were showcased. Their whole team was very professional from start to finish and my countertops are now the show piece of the kitchen. read more

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What a great company. The entire process from start to finish was a real pleasure. Giovanni and Christina are the owners and Tom the salesman were great to deal with. They were informative ,knowledgeable and patient. It was a completely pressure free experience. Frank took the countertop measurements. He was very professional and used state of the art equipment to achieve a perfect fit. And finally Anthony and his installation crew could not have been more professional and courteous. The job really exceeded my expectations. And I really expect a lot when I hire someone to work in my house. If you use another company for countertops then you're making a mistake read more

Gran Marb is an outstanding company owned by husband-and-wife Giovanni and Christina. They go above and beyond to make their customers happy. They love their job! In addition to showing you all the samples of quartz they have in their showroom, they also took us outside to their company yard to show us all the different styles they have worked on. I had an idea of what we wanted. Christina gave us a list of nearby large manufacturer's showrooms to show us the slabs up close. We made an appointment with the company Cambria, and told them the name of the quartz that we were interested in. Not only did they show us the one we picked, but similar ones that we might like. I chose Swanbridge which was one of the extra ones they showed us. I called Christina and told her we needed it in a few weeks to meet the deadline of when our cabinets were going to be refinished. She immediately sent the installer Jairo to remove our old countertop and Frank to measure the space to install the quartz slab. He did it very scientifically by laser. The installer Jairo came back to put the old countertop back on until the new one was installed. Christina was able to get the quartz delivered to GranMarb and cut by her husband Giovanni ahead of schedule. There was enough quartz left over to put behind our stove. It came out beautiful. It fit perfectly. Their installer Jairo is outstanding. We called him our "hero". He paid attention to every minute detail and would not leave until everything was perfect! He also installed our backsplash and painted our kitchen. Everything came out stunning! He also made a little quartz shelf under my kitchen window. Christina, Giovanni, Jairo the installer, Frank, Tommy and the rest of the GranMarb staff make you feel like part of their family. I highly recommend them and give them 5+ stars! I am so happy I found this company! read more

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I am very happy with our decision to use gran marb. They made the selection of our countertops very easy. They took their time to help me pick out the right color to match our kitchen that was undergoing renovation. They also accommodated our delivery window & All of their employees who came to our home to measure and install were very professional and did a great job. I highly recommend them to anyone looking for new counter tops. read more

I found Gran Marb after researching favorable reviews online. I am now joining the others who raved about their service. My quartz kitchen countertop is perfect and beautiful. They use the latest technology from measuring to fabrication to enable a flawless installation that fits like a glove. You deal directly with the owner Giovanni and his lovely wife Christina. They are a professional hard working couple that know their business well in addition to being personable and honest. Go visit them at their beautiful showroom loaded with samples from many brands. You will be thrilled with the results if you let them do your job. read more

I called and e-mailed in an attempt to receive a quote on the fabrication of my kitchen countertops. It took them 2 weeks to respond and the woman told me to e-mail her my layout and slabs we selected at the local stone yard. Upon e-mailing they went silent for another week and they told me they would get back to me ASAP. It has now been an additional 3 weeks and no response. They came recommended to me but unfortunately it does not appear they are interested in the job, I just wish they would have communicated it. read more

My wife & I visited the showroom & were very impressed with Christine's knowledge & patience spending time showing us many quartz kitchen countertop samples that are manufactured in this country .We picked out the one that we liked best & made an appointment to view an 8 foot slab in the Cambridge warehouse in the Grumman site in Hicksville .. After viewing the sample we had someone come to the house to measure .Giovanni ,who happens to be Christine's husband & the owner gave us a fare price & the installation went smooth, on time by 3 professional nice young men .We highly recommend this company. Gail & Wayne read more

Grand Marb would receive a 10 score if I could. They just completed beautiful granite work on a large circular outdoor kitchen for us with a pizza oven built into it. I found them and selected them based on perfect on-line reviews from other customers and I would recommend their work to everyone. Christina and Giovanni were amazing and owned our work from start to finish. The measuring, fabrication and installation of this job was extremely professional and their pricing is also good. You will not be disappointed in Giovanni and his team at Grand Marb! read more

I highly recommend Gran Marb. Mike and everyone I dealt with were very professional and easy to work with. I purchased Cambria quartz for my kitchen counters and believe I got a good price. They were able to accommodate my contractors schedule and measure for the template on the date I requested and there was a quick turn around for the install. My new countertops are beautiful! After a less than positive experience with a kitchen and bath cabinet showroom for my bathroom quartz - I am so pleased to have found Gran Marb. I used them because of other positive reviews and I'm so happy I did!! read more

Fantastic countertop experience! We were coming out of a horrible experience with another unprofessional countertop company having had to cancel that installation. UGGH!! We came across GranMarb online by accident, saw the awesome reviews online, and decided to stop by. From the moment we stepped into the showroom, both Christina & Giovanni made us feel very special! They helped to direct us granite vs quartz and the pros and cons to each one, then took their time to help us pick out and match a Cambria Quartz countertop to our existing backsplash and kitchen cabinets. The quality of their quartz was also like none other we had ever seen in other show rooms. Never felt any pressure, always taking their time to get to know us and our needs. Never rushing us. Their prices were great, and today we had the installation! Their crew was professional, courteous and extremely clean!! Since my husband is in the cabinet business, he was looking for PERFECT installation...he checked every cabinet to make sure the job was all "level and perfect"....and yes it was!! Absolutely exceptional experience! If you're shopping around for countertop, PLEASE stop by this showroom...you will not walk away disappointed. This is a family owned business and they truly take their business seriously. Can't say enough about them! Just wish we had gone to them first!! read more

A few months ago I was looking around for a quartz countertop at a reasonable price, and I found Granmarb online. When I went to their showroom and met the owner, I knew I wanted to work with them. He was friendly yet professional, and he had exactly what I was looking for. His workmanship was wonderful. The Cambria countertop was not only beautiful, but perfectly fitted with an almost invisible seam (my counter is extremely large and is L-shaped). The installers were also professional and worked quickly and precisely. My countertop has held up well, is easy to clean and incredibly strong. I have no reason to doubt that this countertop will be around for decades. Thanks, Granmarb! I highly recommend you! Sincerely, Susan Redmond read more

I found GranMarb by accident when I got lost on my way to a stone yard. I am so glad I did! They were extremely professional and easy to deal with. My counters were installed a week after the measurements were made and the entire process was very easy and smooth. I never discussed how the countertops would be cut or what seams would go where and I was completely surprised when my entire large L-shaped counter was cut from a single slab! Considering how little input I had in the whole process (I just picked the quartz type, the finish and the edge) and how much I trusted them to get everything else right, I was so happy with the outcome and how everything came together without a single issue. I would absolutely recommend them to anyone. read more

Okay it's been about two years that Giovanni at Gran Marb installed my granite top on upper level of house and a quartz top on lower level kitchen. Now I hit the quartz top with a cast iron pan and chipped it. Now I go to Gran Marb, not expecting anything but thought maybe they could do something, Giovanni not only sent the guy to my house and made it look like new. But didn't even charge me anything!! All I can say Is God bless him his family and the business and men who work for him. The BEST company I have eve dealt with. If I can give more stars I would. Oh and I don't know how it came out that I was in California. I'm in Long Island N.Y. read more

Thanks to Giovanni and his staff at Gran Marb our granite countertops are absloutely beautiful. Precision measuring made them fit like a glove. Installation was quick, clean and very professional. We couldn't ask for a better selection and more professional staff. It made our experience a pleasure. read more

Granmarb just completed my White Carrera Honed countertops for my brand new kitchen. My experience with Granmarb has been a 100% pleasure and the job they completed was absolutely professional and superb!!!!! You are treated as if you are the only customer they have!! Their advise, their assistance iinpicking out the correct and most beautiful piece of marble was their high priority. Words cannot express my total delight and satisfaction I have for this company. Their employees and technicians are friendly, polite and professional. Their technicians who came to my home to install my countertops were informative and after they had completed the installation, they cleaned up. Last by not least, their prices are very competive. No doubt, Granmarb is tops! read more

After many years of having companies do work at my house,I have Never been even 70% happy with any of them! Until I had Granmarb do our 2 kitchens, One with Granite and the other with Quartz, And if you can give more than a 100% rating I would!! When we spoke with Giovanni,of Granmarb, he said what would be done, And I have to say he was a man of his word, The men came over to install and they did it like the professionals they were! Not only that one of the cabinets were not level, and I thought oh no, but the men broke up the high spots on floor,put cabinet back and granite fit like a glove! And the work looks Fantastic. I have never given a good review to Any company,much less excellent that I am giving to this company. Do yourselves a favor save time,money and headaches, and go see Giovanni, you too will be satisfied. read more