DIY Modular Outdoor Kitchen Cabinets & Stone Frames

The Unity System: Base Units + Expansion Options. Zero Cutting Required.

We simplified the custom outdoor kitchen. You don’t need to be a mason, and you don’t need to hire a contractor. You simply need our streamlined system of Unity Smart Modules. By mixing and matching these core masonry blocks, you can build thousands of unique layouts—from simple grill stations to massive U-shaped entertainment hubs—without a single saw cut.

Stop Guessing and Start Planning

Building a stone kitchen is permanent. Your plan should be, too. Most DIY mistakes happen because people buy products before they understand their space. We want to save you from that regret.
Before you select a single module, walk through our 4-Step Design Framework. Start with your ‘Mission Statement’ to define your budget and goals, then use our ‘Big Three’ strategy to map your zones. Finally, use our layout tips and cut-out templates to prove it all fits.

This video will help you know what you need to think about before you start any outdoor living project.

Define Your Mission

Watch This Before You Buy Anything or Start Your Project

Overview of a lively patio party featuring an outdoor kitchen and fireplace, creating a warm and inviting atmosphere for guests.

Map Your Zones

Plan the Perfect Patio Layout: The ‘Big Three’ Outdoor Design Strategy

Stone outdoor kitchen with wrap-around bar, wood-fired pizza oven, kamado smoker, and gas grill in an outdoor patio setting

Optimize the Flow

5 Tips for Designing the Perfect Outdoor Kitchen Layout

Download our Design Guide PDF.

Verify the Footprint

Create Your Custom Outdoor Space. It’s easy with our Layout Guide

Unity Badge

How the Unity Smart Module System Works

We simplified the custom outdoor kitchen. You don’t need a mason or a wet saw to build a professional layout. By combining our standard frames with intelligent ‘Plus’ extensions, you can build professional masonry stations that fit your patio perfectly. Here is the 3-step process:

Unity allowws you to create endless modular outdoor kitchen layouts.

Choose Your Station

Start with the function. Select a Gas Grill, Kamado, Pizza Oven, or Bar module. Each unit is a standalone masonry block designed to fit specific appliances with zero cutting. We eliminate guesswork and adjustments, making the path to your dream outdoor kitchen as easy as possible.

Choose Your “Plus” Upgrade

Need more utility? The “Plus” option extends any frame and countertop by 24 inches. Use this extra countertop space for a Drawer Bank or a Cabinet, or leave it hollow to create a seamless Corner.

Illustration of how you would connect pizza Island kits in a corner.
Our kits are easy to build for beginners with no heavy lifting

Interlock & Bond

No metal studs. No screws. Stack the solid stone-look blocks and adhere them supplied in easy-to-use caulk tubes). Pro Tip: Every module is fully reversible—build your grill or corner on the left or right to fit your flow.

Why Choose Solid Masonry Frames Over Metal Tubes?

Most ‘DIY’ outdoor kitchen kits are actually just metal skeletons. They rely on thin galvanized steel tracks, hundreds of screws, and flimsy cement board to hold their shape. While they might look okay on day one, metal inevitably faces the elements. Our Modular Cabinets are different. We use solid, high-density tumbled concrete. We don’t build a temporary frame; we stack a permanent masonry foundation that creates a quiet, rot-proof, and rock-solid structure for your premium appliances.

metal grill frames rust

Zero Rust, Zero Rot

Moisture is the enemy of metal. Even galvanized steel frames eventually corrode at the cut points and screw holes. Our solid concrete modules are impervious to rain, snow, salt air, and humidity. They won’t rust, rot, or degrade.

Our outdoor living kits don't require any cutting.

No Cutting, No Screws

Forget tin snips, chop saws, and cement board. Metal frames require precise cutting and hundreds of fasteners. Our system is pure masonry: simply stack the blocks and bond them with adhesive. If you can use a caulk gun, you can build this.

Man on Grill Island

Rock Solid Strength

Metal studs can flex under heavy granite or premium grills. We don’t have that problem. Our interlocked concrete blocks are so structurally sound that they can support thousands of pounds. Go ahead, jump on the counter. We did (and that’s 250lbs of proof)

Limestone, countertop and sink detail.

Genuine Limestone

We don’t skin our frames with fake veneer. We top them with genuine Indiana Limestone. These 2-inch thick slabs are honed and finished on all six sides for a premium, architectural look that no metal kit can match.

Shop Modular Stone Kitchen Modules

Build cook and enjoy all in a weekend

Need Real-World Kitchen Layouts?

Check Out Our 30+ Outdoor Kitchen Layout Designs

Explore 30+ outdoor kitchen layout ideas organized by shape, size, and cooking style.

Design Your Ultimate Outdoor Kitchen Layout

Great design shouldn’t require a degree in engineering. We built the Unity System on a standardized modular footprint. Whether you are building a simple 6-foot grill station or a sprawling U-shaped entertainment hub, the logic is the same: Pick your appliance modules, then connect them.

Experience the convenience and elegance of Unity Outdoor Modular Outdoor Kitchens, where transforming your outdoor cooking space is a breeze. Crafted for discerning homeowners who crave sophistication without the hassle, our modular kitchen components effortlessly come together to craft a personalized outdoor culinary haven.

Unity Outdoor Kitchen layout

Whether you’re a seasoned grill aficionado or a social butterfly who loves hosting gatherings, Unity’s modular kitchen system offers boundless opportunities for customization and adaptability. From sleek kitchen islands to comprehensive outdoor cooking setups, our innovative approach seamlessly blends style with practicality, setting the stage for unforgettable moments with loved ones.

Plan the Perfect Layout

Building your dream outdoor kitchen shouldn’t feel like a major construction project. Unity’s modular system is designed for simplicity, ensuring that creating your ideal outdoor cooking space is as enjoyable as using it. With clearly labeled components, detailed step-by-step instructions, and no specialized tools or masonry skills required, your outdoor kitchen kit comes together smoothly, letting you focus on the fun of the build—not the hassle.

In traditional masonry, creating an L-Shape requires complex cuts and “dead space” fillers.

The Result: As shown in the gallery, arranging the modules creates the layout—no custom fabrication required.

The Linear Run: Connect modules side by side for a classic grill wall.

The “Plus” Solution: Our Unity+ Modules feature integrated extensions. These aren’t just for drawers; they create the open cavity needed to turn a seamless 90-degree corner.

  • Outdoor kitchen layout shown with disconnected modules.
  • You can see how easily all of our grill islands connect.
  • You can even connect grill islands to make an exterior corner.
  • Connect multiple grill islands together for your ultimate outdoor cooking experience.
  • You can easily connect all of our kitchen components following a few simple rules.
  • Outdoor kitchen bar unit corner connect

Ultimate Flexibility and Control

You aren’t locked into a single setup. Because the system is modular, you have the freedom to design a kitchen that fits your specific lifestyle—not just a generic kit from a box store. Every Unity outdoor kitchen module is precision-crafted to fit seamlessly together, eliminating guesswork and frustration during assembly. Forget complicated cuts, messy mortar, or heavy equipment—our thoughtfully engineered kits simplify your DIY project, making professional-looking results achievable for everyone, from enthusiastic homeowners to seasoned landscape pros.
Best of all, each modular kit is designed to be built at your pace, giving you the freedom to assemble quickly over a weekend or gradually when your schedule allows. Effortless doesn’t just describe our assembly; it’s the entire experience, from unpacking your kit to firing up your grill for the very first cookout.

  • Start Small or Go Big: Begin with a single Grill Island today. Because the stone matches perfectly, you can expand next year with a Pizza Oven module or a Bar Return.
  • Tailored to You: From sleek, space-efficient islands to comprehensive outdoor cooking setups, you control the footprint.

Effortlessly Assemble Your Modular Outdoor Kitchen

Learn from the Pros – Check Out Our How-To Videos on YouTube

Building your dream outdoor kitchen shouldn’t feel like a major construction project. With clearly labeled components and detailed video instructions, your kit comes together smoothly, letting you focus on the fun of the build—not the hassle. Don’t just take our word for it. Watch Terry build a complete Unity G+ Grill Island right on a patio. From the first block to the final sear, this video proves that “DIY” doesn’t mean “Second Rate.

No Specialized Tools Required

Forget renting concrete saws or heavy machinery. We replaced the wet saw with a caulking gun. Because our modules are precision-crafted to align naturally, you don’t need masonry skills—just a level base and a free afternoon.

Build at Your Own Pace

Effortless doesn’t just describe the assembly; it’s the entire experience. You have the freedom to assemble quickly over a single weekend or gradually as your schedule allows. From unpacking your kit to firing up your grill for the first time, we made the process as premium as the finished product.

Read Our Customer Testimonials

All customer reviews are unfiltered

Click here to see all our Testimonials. They are unfiltered for true authenticity.
Customer built affordable DIY outdoor L-shaped kitchen

Real Stories, Real Outdoor Kitchens

❞

If I could give Cornerstone Rocks 10 stars, I’d give them 20. From ordering to delivery to support, Jake and Terry are consummate pros. The instructions were spot on, and when we did have a question, a quick call got us right back on track. My friend and I—two old guys—built a Unity C+ and Unity Z+ Deluxe in an L-shape in just two days. Friends are blown away by the results! The only disappointment? That the build was over—it was that rewarding.

George W.

Beginner

Frequently Asked Questions

Do I need a concrete foundation?

Not necessarily. You need a stable, non-shifting base to support the weight. A poured concrete slab is perfect, but you can also build directly on a compacted crushed-aggregate foundation (standard paver base) or on top of an existing, properly installed paver patio.

What are the countertops made of?

We supply genuine Indiana Limestone, a premium natural stone. Unlike cheap pavers or thin tiles, our tops are 2 inches thick, honed, and finished on all six sides for a clean, architectural look from every angle.

How do the modules stay together?

The system relies on gravity and chemistry. The heavy high-density blocks are dry-stacked for a precision fit, then locked permanently in place using high-strength masonry adhesive and caulk-tube mortar.

Can I cut the modules?

You never need to cut our modules to make them fit. The system is designed with standard dimensions to fit the specific appliances we recommend. However, because the blocks are solid concrete, they can be cut with a diamond blade if you have a unique custom obstruction on your patio.

Ready to Transform Your Outdoor Space?

Discover how Modular Outdoor Kitches can add value and functionality to your backyard.

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