Nope. You need firebrick and refractory mortar for a fire pit. Building a fire on top of concrete or next to standard brick is an invitation for that stuff to shatter into very sharp and dangerous projectiles.

It looks small to me, but for size, get a box the size of your desired firepit and two chairs. You can put a purchased fire pit with legs on the concrete.

There are minimum distance/spacing requirements advised - and in some cases, required - for siting a firepit. You need a good 3 feet away from the firepit to place chairs or seating. Any closer will be uncomfortable, not to mention the heat could cause the plastic Adirondack chairs to melt.

Check with your local municipality before you do anything and follow whatever guidelines or rules they have established.

The spacing looks far too tight to me.

Thank you Doug for the mock up! That’s exactly what I’m thinking of doing. I’m just wondering the best way to fill it in

Sorry, but Doug's spacing is way off!! Even if such a configuration was approved in your location (doubtful), the chairs or other seating are uncomfortably close to the firepit. You'll cook!!

Check first!! Don't just rely on dubious online comments or photoshopped renderings..

LL Bean Adirondak chairs are 30" wide, and 35" deep. LL Bean's stand alone fire pit is 19.5 inches in diameter. So, if you put one of those chairs on either side of the firepit, as @Doug Lockwood, VSLD Certified (zone 8) has shown, you'd have 1/4 inch between the edge of each chair and the firepit. No one has 1/4 inch legs. You can look up chair dimensions and firepit dimensions on line. You might get something a bit smaller, but you're not going to get anything that makes sense.

This is why photoshopped renderings are so often worthless. They can produce a lovely picture that's out of scale. While most programs don't let you make a tulip larger than an oak tree, something with a scale 20% off from reality is going to be very deceptive.

Appreciate everyone’s comment! I wanted a sanity check so this was extremely helpful :)

If you truly desire specifically a fire pit and adirondacks, you can purchase them at any time. They may not fit well in that existing bricked space. You can demo it instead of trying to force a use, or just demo the low side so you can extend a seating area further toward the kiddie pool. Or it looks like a stone walled area behind there might also be a good initial fit for a fire pit area. Basically, don't hinder your choices based on a non-conforming existing palette for other things you want.

If you have a wood fire pit, typically you want the ability to move/rearrange chairs further/closer as heat and smoke requires. Gas is more rigid with seating. It doesn't appear this brick area is large enough for real adirondacks as others have said.

Only if you build a fire pit, vs prefab, do you have to worry about the type of pit floor and wall material. The groundcover under the chairs should be a more solid material, like decomposed granite, rather than loose stone/pea gravel/river rock which would displace and chair legs sink in.

You're still going to struggle with Doug's new design. According to Homenish, the minimum size for a fire pit is 3' in diameter. According to Apartment therapy, you need 1.5 feet between a chair and a coffee table. And the Bean Adirondak chairs are just about 3 feet deep. That has the fire pit and the legs of the chairs on the edge of your platform and barely enough space between the chairs and fire. If the fire or fire pit is hot, to get out of your chair, you're going to be very close to the fire and you can't push the chairs backwards or they fall off the platform.

And, you note, his picture shows the fire pit and chair within the brick perimeter, which is going to shave off a few inches, which you can't really afford to do.

The back of the platform is level with the ground in the short direction and Doug's design puts the chairs on the longer side. Either one chair will be on a corner off the ground or you turn the design 90 degrees and have even less space to squeeze between the chairs and the fire pit.

Again, this illustrates the problems with designs over the internet. A designer who actually looked at the site would have noticed the orientation. And, of course, free designs over the internet where the designer spent a very minimal amount of time on the design.

Depends on the firepit. If you want a small ambiance firepit like a tabletop one, sure. No problem. If you want to use a gel or gas controlled smaller one, sure. A smaller chimenea in a corner would work. If you want to have a pyro-gratifying wood burner, you will need a bigger pad for the pit and chairs.

If you have a charcoal grill and a couple chairs, you can test it. Put the grill where you think a firepit would go, and chairs where you think they go. Sit out there while you fire up and cook out. Are you comfortable, is it too hot?