Stone Grill Island with Pizza oven - grill and oven included

Masterson Series Premium Grill Islands

Built-in Grill Island Command Centers are an Affordable Alternative to Outdoor Kitchens

Masterson-W Grilligan's Island YOUR GRILL HERE

Grilligan’s Island DIY Grill Upgrade Kit

Update your Existing Grill Cart to a Grill Island


Masterson-D Grill Island Stone Kamado Table

Outdoor Stone BBQ Island with Grill Dome Kamado Smoker


Masterson-G BBQ Grill Island

DIY Stone Grill Island Command Center


Masterson-K Grill Island with Kamado and BBQ Grill

Build Your Outdoor Kitchen with the Professional Grill Island featuring an Included Kamado and 32″ Stainless BBQ Grill


Masterson-O BBQ Grill Island with Pizza Oven

Enjoy the Professional-Grade Performance of a Grill and Oven in a Full Masonry BBQ Grill Island


Masterson-Z Grill Island with Wood-Fired Pizza Oven

Affordable BBQ Stone Grill Island with Wood-Fired Cru Pizza Oven

Grill Islands Provide the Premium Feel of a Full-Featured Outdoor Kitchen Without the Hassle and Hidden Costs

Step into the world of Masterson Grill Islands, where luxury meets practicality. Say goodbye to the complexities of electrical setups, plumbing woes, and the need for protective roofing. No more waking up to find uninvited guests in your kitchen drawers or battling with a fridge that can’t beat the summer heat. With Masterson, you get all the gourmet outdoor cooking features you desire – from wood-fired ovens to state-of-the-art kamados – seamlessly integrated into stunning stone islands. It’s the elegance of a grand outdoor kitchen without the challenges. But it’s more than just about the cooking. It’s about the memories you’ll create, the laughter you’ll share, and the parties you’ll throw under the stars. With Masterson, every evening can be an unforgettable gathering, celebrating good food and even better company. Elevate your outdoor entertainment with Masterson Grill Islands, where we turn your backyard into the hottest dining spot in town.

free 3D model mockup

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Cornerstone Kits are High-Quality and Easy-to-Build

You have several options to choose from when deciding what and where to buy outdoor features for your backyard makeover. It is easy to get caught up in features and sizes, and prices. The decision can be daunting. But choosing an outdoor living solution doesn’t have to be stressful. We want to make it easy for you. If you need any help, contact us. We’re a small business that is easy to get in touch with and eager to help you with your project.

Cornerstone has brought the best people and products in the industry to design a comprehensive outdoor living suite that benefits you. We have analyzed the designs and features of fireplaces, ovens, and grills to bring you the best value on the market. Importantly, all our kits keep safety and best practices at the forefront of their designs. In addition, we have improved features where needed and removed anything that is high maintenance or unnecessary. As a result, we only offer tried and true designs that will be around for years to come.

Cornerstone Block System

Top Quality

Designed to the highest measures using the best materials available. We build up to a standard, not down to a price point.

Fireplace kit build- keep your blocks straight and flush

Easy to Build

Expertly designed so your mom could build it in a couple of days. Simple stack and glue construction is easy for beginners.

Isolated View of a wide patio layout design that features a stone Fireplace with TV and matching attached BBQ grill and Kamado


Customize our kits, then mix and match them in infinite ways. We have a solution for your backyard dream oasis.

Roll of dollar bills on stack of hundreds.

Save Money

No professional designers or installers are needed. Know what you are getting and exactly how to build it- saving time and money.

Jake and a Metro D Grill Island with matching Kamado smoker

Ditch Time-Consuming Frame Kits: Get a Stone Grill Island in Hours, Not Days, with Our Unique System

Enjoy more grilling and less building. Our unique masonry system allows DIY beginners to build a durable stone BBQ grill island in just hours.

Masterson BBQ Grill Island kits include Premium features

We know how important a functional, durable, and enviable outdoor grill island is. So, we make all our BBQ grill islands out of non-combustible materials for safety and longevity. While it will probably only take you a few hours to assemble a grill Island kit, you will want to enjoy it for years to come. So, we design our grill stations to be low maintenance yet high-performance.

Summerset 32

Get Built-In Professional-Grade Grills in our Grill Island Kits

Summerset Sizzler grills are professional in every way. Thus, their full stainless construction and professional features will impress discerning grillers for years to come. However, for those who demand more features, you can upgrade to the PRO model for added convenience.

Enjoy the Durability and Beauty of Natural Stone Countertops in all our Grill Islands

Your BBQ grill island serves as your outdoor kitchen. Therefore, you need ample room for prep and service. Hence, our outdoor grill islands include almost 12 square feet of countertop space. This gives you plenty of room to serve directly from your grilling station.

Cornerstone Grill Island Tool Niche detail.

Get Safe, Long-Lasting, Non-Combustible Masonry Construction Throughout

Just because it is an outdoor kitchen doesn’t mean you can’t burn the house down. Therefore, to ensure you are keeping the family safe, we make all of our BBQ grill islands out of solid masonry. We use solid concrete blocks and stone tops for safety and low maintenance. Rest assured, this grill island will last .

Build Your Outdoor Kitchen in a Few Hours with Masterson BBQ Grill Island Kits

Our unique building system is much faster and easier than grill island frame kits. In addition, the pieces are relatively lightweight, and the instructions are simple to follow. You simply stack and glue the pieces together. No cutting blocks. No mixing mortar. No mess. It’s like Lego for adults!

Our kits are easy to build for beginners with no heavy lifting


This kit was one of the easiest DYI project I have ever completed. And I have never worked with stone before. The instructions were for true beginners. It turned out great.

Farrin W.


Cornerstone rocks founder Jake Shelby.

Enjoy your stress-free hardscape project!

Managing all the variables of hardscape design and installation can easily become overwhelming. Who has time to review hundreds of materials and products? How do you know what products work best together? Never mind the time wasted planning and troubleshooting your designs! That is why I have come up with an easier way.

I offer a selection of complete, DIY-friendly kits that are ideal for all types of spaces. All products are premium and chosen based on extensive experience. Each kit comes with all the materials you need, including glue. You just need simple tools. No special skills are required.

Choose from our complete line of customizable hardscape features

All our outdoor living kits are DIY friendly and are fun and easy to build:

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