General Info

How to Build a Fireplace in a Corner

You can build a fireplace in a corner

Many customers want to build a fireplace in the corner of a patio. Installing a fireplace at a 45-degree is easily done, although many people tend to complicate the issue or over-think it. Fortunately, it is simple. You have several options to achieve a corner fireplace build. There are some things you should and should not do. Then, let us go over what can and shouldn't be done, then dive into how to do it properly and easily.

Some Ideas are too complicated

I get some crazy requests and ideas for how to put their fireplace in a corner or curve. Many ideas come from people's imagination—most of which they have never seen. There is no need for many of the complications people dream up—which is why they have never been seen. One such "creation" is a 5-sided fireplace that fills the corner. This add-on creates tons of difficulties and expenses. In reality, it isn't impossible, but near impossible. It may seem impressive, but there is no need for this complicated build. It doesn't even save space; It takes up more of it.

This is not a sloution. This is a complication.

What is up with this beast? How would you make that chimney draw? How many cuts would this take? As you can see, this is added complication with no benefit. There is still a back wall—just pointy. In the end, it even doesn't change the sides or how it sits in a corner.

Some Ideas are ineffective

Many people thinking of building a fireplace in a corner want to angle the wood boxes. "Is there a good way to angle the boxes and fill in the gap it creates?" The short answer is "No." But don't take my word for it—see for yourself. Let's delve a little deeper and see why this doesn't work.

This is a bad idea.

This is a terrible idea.

In this example, we didn't cut the cap. I used my magic concrete stretcher to double its length. Then, I cut the cap at an angle. Realize that this is twice the size of the standard cap. This large cap will represent a "fill-in-the-gap" scenario. Notice that there is very little room for the wood. Moreover, the angled boxes are cramped and not useful.

What about the Classic boxes? They are bigger. Can they be cut to fit? As you can see, that idea is just as bad. These illustrations show why you don't angle the wood boxes. But, there are good ideas and ways to put your fireplace into a corner. Let's learn the best ways to build to achieve that placement.

There are easy and effective ways to build in a corner

Okay, enough of what not to do. Below we will learn how to build a fireplace in a corner, or kitty-corner, or catty-corner, or however you want to say it. Many people say a 45-degree angle, but isn't it truly 135-degrees? Whatever the case, the process is the same. Let us start simple with just a fireplace. I am only going to show the Princeton and Fremont here. They have the smallest footprint, and caddy-kitty-corner builders are usually trying to save space—so no Rockwell was shown. Though the idea is the same. You will learn that the only way to save space is to place the fireplace off the patio. Placing it on the patio- even kitty-corner- takes up "more" space.

You can cut the corner off your slab and abut your firepace. It is straightforward and effective.

You can be tricky and overhang the hearth of your patio. See my post on raising your fireplace.

Don't want to alter your existing patio? No problem. You simply set the fireplace close to the corner.

That may seem obvious, but many times the simplest solution is the best. But many people want to make it wrap around the corner. To achieve this, modify the seat wall extensions to hug the corner. It is simple and effective. See the illustrations below for the simple layout.

Your fireplace wants to give you a warm hug. You should let it. 

Building in a corner with wood boxes

When using wood boxes in a corner, you need to keep the fireplace and wood boxes together as one unit. We saw how bad they become when you try to modify the boxes at an angle. Therefore, you must keep the boxes and fireplace as one unit. The same simple rules will apply to this large unit as it did to placing the singular fireplace unit.

You will get the same width for the fireplace and wood boxes unit no matter which fireplace you choose. Even the Rockwell has the same width along the back as the Fremont and Princeton when you add the boxes. In this case, it is the hypotenuse of your right triangle. You will see how these are the same in the below images with the seat extension layouts. As before, if you want the unit to wrap the corner, use the modified version of the seat wall extensions.

There you have it—simple, straight-forward, and effective. Placing your fireplace in a curve or corner does not need to be complicated. People think by tucking it in the corner they will save space. As you see, this isn't the case. You should only build a fireplace in a corner if doing so improves your layout and traffic flow. If you don't want extra patio behind your fireplace, cut it off or place some potted plants there- maybe even a small raised flower bed. Take your time and plan well. You won't be moving this thing once you build it, but don't be afraid of putting it in a corner.

Download the seat wall modification instructions

Hopefully this article convinvced you to use a curved seatwall to bend around the corner. I think it is such a good idea that I made some plans for you to follow. Note that these instructions are for modifying the standard wing wall extensions. There is no need to buy a special kit. Check out the instructions for more information.

As you can notice, my Orion building system is highly customizable and extendable. Hopefully these plans will help you with your build. As always, direct any questions to

Grace Ekanem

related posts:

How to raise your Fireplace Kit

9 Small Patio Designs with BIG Impact

5 Steps to Designing YOUR Dream Patio

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