We turn stone slabs into beautiful countertops!
Luxury stone countertops will be the showpiece of your project. Getting custom countertops made is a big investment, which can be stressful and confusing. There are lots of companies out there that consider the details “Not My Job” which can cause problems with your project.
AVOID –
- Delays: Companies that do not deliver on time delay the next steps (plumbing, paint…) that cause scheduling nightmares
- Faulty Installs: Improperly supported or installed counters causing future problems such as cracks and breaks
- Poor Design: Sink reveals and openings for appliances can impact how your kitchen functions
Cornerstone has completed thousands custom countertops for contractors, designers, and homeowners. Here is what our customers have to say:
4.7
Based on 69 reviews
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Kenzie Shippy
21:43 23 Dec 25
Cornerstone did a great job installing our cabinets and counters. We had a few things that needed further attention after installation, and they happily came back to fix! Very responsive and helpful! Highly recommended working with them on your next project!
Brad Vigil
20:15 05 Dec 25
⭐⭐⭐⭐⭐
Jim, Andre, and the entire team were absolutely incredible. From start to finish, their professionalism, knowledge, and attention to detail were on full display. Our new countertops turned out beautiful, the quality is outstanding, the install was flawless, and they treated our home with total care and respect.
On top of that, they are genuinely kind people who made the entire process smooth and enjoyable. Highly recommend this team to anyone looking for top tier craftsmanship and service
Jim, Andre, and the entire team were absolutely incredible. From start to finish, their professionalism, knowledge, and attention to detail were on full display. Our new countertops turned out beautiful, the quality is outstanding, the install was flawless, and they treated our home with total care and respect.
On top of that, they are genuinely kind people who made the entire process smooth and enjoyable. Highly recommend this team to anyone looking for top tier craftsmanship and service
Nathan Byrd
18:46 07 Nov 25
Came and did a sink repair - professional and speedy.
National Ranking Countertops Contractors
14:00 23 Sep 25
The Countertops Contractors Ranking team is pleased to recommend Cornerstone Granite as one of the highest-rated companies in the United States according to the 2024–2025 national ranking of stone countertop fabrication and installation companies.
Based on our independent evaluation, the company ranked #56 nationwide, took the #2 spot in Colorado, as well as the #1 position in Westminster.
In our mystery shopper research, Cornerstone Granite demonstrated a high level of customer service and professional consultations. We rate the quote turnaround time of Cornerstone Granite as Very Fast. The company offers a wide selection of granite, quartz, and marble, while its in-house showroom and fabrication facilities allow full control of product quality at every stage.
In terms of pricing, we rate the price level of Cornerstone Granite as Below Average among top-performing companies in the region. The company requires a 75% upfront payment, which is higher than the industry standard, but typically completes fabrication in about 10 days — a very fast turnaround time that provides additional convenience for homeowners.
Taking all results into account, in the opinion of the Countertops Contractors Ranking team, Cornerstone Granite is a reliable and transparent partner for homeowners seeking quality stone countertop fabrication and installation services in Colorado and beyond.
Sincerely,
The Countertops Contractors Team
Based on our independent evaluation, the company ranked #56 nationwide, took the #2 spot in Colorado, as well as the #1 position in Westminster.
In our mystery shopper research, Cornerstone Granite demonstrated a high level of customer service and professional consultations. We rate the quote turnaround time of Cornerstone Granite as Very Fast. The company offers a wide selection of granite, quartz, and marble, while its in-house showroom and fabrication facilities allow full control of product quality at every stage.
In terms of pricing, we rate the price level of Cornerstone Granite as Below Average among top-performing companies in the region. The company requires a 75% upfront payment, which is higher than the industry standard, but typically completes fabrication in about 10 days — a very fast turnaround time that provides additional convenience for homeowners.
Taking all results into account, in the opinion of the Countertops Contractors Ranking team, Cornerstone Granite is a reliable and transparent partner for homeowners seeking quality stone countertop fabrication and installation services in Colorado and beyond.
Sincerely,
The Countertops Contractors Team
janet houston
19:14 22 Aug 25
Great working the team at Cornerstone..easy friendly and affordable
Phillip Daughton
17:24 22 Aug 25
We've been using Cornerstone as one of our trade partners for years now and they always deliver on fair pricing and a quality install! We would recommend them to anyone looking for beautiful, professionally installed countertops.
Caleb Stoll
14:20 08 May 24
Cornerstone Granite designed and installed the cabinets for my basement kitchen. The design was great and they had many suggestions. The install was extremely quick and there was a lot of attention to detail. Any concerns were immediately resolved. The owner is just a fabulous guy and I highly recommend Cornerstone Granite.
Tracy Rivera
21:13 03 Aug 22
I have worked with Cornerstone on several jobs. Great company that does excellent work! Perla is wonderful to work with. I have recommended them to several of my friends and family!
Roger Fujii
20:22 23 May 22
Great experience,good people, good price,quick and efficient.Would recommend them in a heartbeat
Ally Stevens
15:26 31 Mar 22
Cornerstone Granite does amazing work. They were friendly, helpful, timely and overall fantastic to work with. Highly recommend.
Devin Patel
02:15 29 Oct 21
Awesome service. Really responsive and attentive to details
Our Process
Select material and get a bid for your project
Laser measure & template the walls and cabinets (exiting or new)
Fabricate (cut and polish) the stone to the exact size and shape of your project.
Install your new countertops!
Ready to get started?!
From slabs to countertops.
Contact Cornerstone Granite Today!