An outdoor fireplace in 2026 spans a huge cost range: $2,000 to $6,000 for a prefab kit, $3,000 to $8,000 for a DIY masonry build, and $8,000 to $20,000+ for a custom stone fireplace installed by a mason. The difference comes down to materials, chimney height, whether you're burning wood or running gas, and how much of the foundation and masonry work you tackle yourself versus hiring out.
Unlike a fire pit, an outdoor fireplace is a vertical structure — you're building walls, a firebox, and a chimney, which means a real footing, clearances from your house and property lines, and usually a permit. The payoff is a centerpiece that heats a seating area, blocks wind, and adds serious curb appeal. We'll walk through the cost drivers, show you what a DIY brick build actually involves, break down gas-versus-wood hookup costs, and give you the clearance and permit rules that trip up most first-timers.
2026 outdoor fireplace cost by type
The cleanest way to think about outdoor fireplace cost is by construction method. Each category hits a different balance of material expense, labor intensity, and finish quality.
| Type | Cost range | Installation | Notes |
|---|---|---|---|
| Prefab metal kit (wood) | $2,000–$4,500 | DIY, 2–3 days | Steel firebox, modular chimney; bolts to concrete pad. |
| Prefab stone veneer kit | $3,500–$6,000 | DIY, 3–4 days | Metal core with faux-stone panels; realistic look. |
| DIY brick/block masonry (wood) | $3,000–$8,000 | DIY, 1–2 weeks | Real masonry; requires footing, mortar skills. |
| Custom stone fireplace (wood) | $8,000–$15,000 | Professional mason | Natural stone veneer or full-thickness stone. |
| Custom stone fireplace (gas) | $10,000–$20,000+ | Professional mason + plumber | Gas line, burner, stone work, built-in seating. |
Prefab kits have come a long way — the mid-tier ones now use realistic stone veneer over a steel frame, and the firebox is pre-engineered to draft properly. You're still anchoring it to a concrete pad and assembling modular chimney sections, but there's no mortar, no guessing on firebox dimensions, and the instructions are tested. A true masonry build gives you complete control over size, stone choice, and design, but you're also engineering the firebox, flue sizing, and chimney height from scratch, which is where most DIYers get stuck.
The foundation: non-negotiable and often underestimated
Every outdoor fireplace — prefab or masonry, wood or gas — needs a concrete footing that extends below frost line and a reinforced pad on top. A typical small fireplace (36-inch-wide firebox, 7-ft chimney) weighs 1,500 to 2,500 pounds once it's built; a large stone fireplace can hit 5,000+ pounds. Set that on bare ground or a thin paver base and you'll watch it crack and settle within a season or two.
In most of the U.S., that means digging a trench 12 inches wide and 18 to 36 inches deep (deeper in freeze-thaw climates), pouring a reinforced concrete footing, then pouring a 4-to-6-inch slab on top. For a modest fireplace you're looking at 0.75 to 1.5 cubic yards of concrete total, which is $150 to $300 in material if you mix it yourself, or $400 to $700 if you have it delivered and placed. The concrete calculator converts your footing and pad dimensions into yards and bags so you order the right amount.
| Item | Quantity | Unit cost | Total |
|---|---|---|---|
| Excavation (DIY or hired) | ~4 hrs | $0 or $200 | $0–$200 |
| Concrete (footing + pad) | 1.2 cu yd | $140/yd | $170 |
| Rebar + wire mesh | misc. | — | $40 |
| Gravel base (4″ under pad) | ~0.3 ton | $40/ton | $50 |
| Concrete delivery (optional) | 1 load | $150 | $150 |
| Total (DIY pour) | ~$260 | ||
| Total (delivered) | ~$610 |
Skipping the footing or going too shallow is the number-one reason outdoor fireplaces crack or lean. If you're in a northern state where frost heaves are real, your building department will likely require the footing to go 42 inches down or more. That's not negotiable, and it's also why getting a permit up front saves you from tearing out a finished fireplace later.
DIY masonry build: brick count and material breakdown
A DIY brick or concrete-block fireplace is a realistic project if you've done basic masonry before — laying pavers or building a block wall. You're building three walls around a firebox (the back and two sides), leaving the front open, then tapering up to a chimney. A common size is a 36-inch-wide by 30-inch-deep firebox with walls rising 4 feet, then a chimney extending another 3 to 4 feet above that.
For that size, expect to use 400 to 600 bricks or blocks depending on wall thickness and chimney height. Standard modular bricks cost $0.50 to $1.50 each, so material alone is $200 to $900 just for the brick. Add mortar (8 to 12 bags at $10 each), a firebrick liner for the firebox (50 to 80 firebricks at $2 to $4 each), a steel firebox grate or insert, and a clay flue liner for the chimney, and you're at $1,200 to $2,500 in masonry materials before the foundation. The brick calculator gives you exact brick counts based on your wall dimensions and mortar joint thickness.
Firebox and chimney sizing rules
- Firebox width: 28–48 inches (36 inches is a good all-around size).
- Firebox depth: 24–32 inches; too shallow and smoke spills forward.
- Firebox height: 24–36 inches to the damper throat.
- Chimney flue: minimum 8×12 inches for a 36-inch firebox; scales with opening area.
- Chimney height: at least 12 inches above the highest wall within 10 feet (IRC code).
- Always line the firebox with firebrick rated to 2,000°F+.
Chimney height: the hidden cost multiplier
Chimney height drives material cost and labor faster than almost any other variable. A 7-foot-tall outdoor fireplace uses maybe 200 bricks for the chimney; a 12-footer can push 400+ bricks just for that section. In masonry, every extra foot of chimney is another course of bricks, more mortar, more flue liner sections, and more time on a ladder or scaffold. For a professional mason, taller chimneys also mean higher labor rates because the work gets slower and riskier above 8 feet.
Code usually requires the chimney top to sit at least 2 feet above any roofline or structure within 10 feet. If you're building close to your house or a tall fence, that can force the chimney taller than you'd planned. Measure and check code before you design — adding 3 feet to the chimney mid-build can add $500 to $1,500 in materials and labor.
Gas versus wood: fuel-type cost comparison
Wood-burning fireplaces are mechanically simpler — you're just building a firebox and chimney for smoke. Gas fireplaces skip the chimney (you're venting through a much smaller pipe or not venting at all with a ventless burner), but they add a gas line, a burner system, and often decorative ceramic logs or fire glass. The upfront cost difference is significant, but gas buys you convenience: instant ignition, no ash, no smoke smell, and easier use in areas with burn restrictions.
| Component | Wood-burning | Natural gas | Propane |
|---|---|---|---|
| Foundation + structure | $3,000–$12,000 | $3,500–$13,000 | $3,500–$13,000 |
| Chimney / flue | $800–$2,500 | $200–$600 (vent pipe) | $200–$600 (vent pipe) |
| Gas line hookup | $0 | $800–$2,500 | $300–$700 (tank + line) |
| Burner + logs/media | $0 | $400–$1,200 | $400–$1,200 |
| Total installed | $3,800–$14,500 | $4,900–$17,300 | $4,400–$15,500 |
Natural-gas hookup is the expensive part — trenching from your meter, running black iron or CSST flex pipe, and paying a licensed plumber to connect and pressure-test it. A 30-foot run might cost $800 to $1,200; a 100-foot run across a large yard can hit $2,500+. Propane is simpler if you already have a tank for a grill or generator — you're adding a dedicated line and regulator — but you'll be refilling or swapping tanks a few times a season depending on use.
A worked example: DIY brick fireplace, wood-burning
You're building a 36-inch-wide firebox, 30 inches deep, with walls rising 4 feet, then a 4-foot chimney on top (8 feet total height). Foundation to finish, materials only:
- Concrete footing (12″×48″×24″ deep) + pad (48″×48″×4″): 1.2 cu yd, $170
- Gravel base under pad: $50
- Rebar + wire mesh: $40
- Standard modular bricks (520 total): $420
- Firebrick for firebox lining (70 bricks): $210
- Mortar (type N + refractory, 10 bags): $110
- Clay flue liner, 8×12″ (two 2-ft sections): $180
- Steel firebox grate: $65
- Chimney cap (spark arrestor): $80
Total: ~$1,325 in materials and two to three weekends of work if you've laid brick before. A mason doing the same build would charge $4,500 to $7,500 installed, so you're saving $3,000+ in labor at the cost of time and accepting that your mortar joints won't be showroom-perfect. Use the outdoor fireplace calculator and brick calculator to run your own dimensions and get exact material counts before you order.
Professional masonry labor: what you're actually paying for
Hiring a mason to build a custom outdoor fireplace means you're paying for experience that keeps the firebox drafting right, the chimney plumb and stable, and the whole structure lasting decades. A good mason knows firebox geometry (depth-to-width ratio, throat angle, damper placement), flue sizing for the firebox opening, and how to tie the chimney into the structure so it doesn't crack at the joint. These aren't things you can easily learn from a YouTube video, and getting them wrong means a fireplace that smokes you out or cracks apart after a few freeze-thaw cycles.
Labor typically runs $60 to $120 per hour depending on region and the mason's experience, and a medium-sized fireplace is a 40-to-80-hour job once you include the foundation pour, masonry work, flue installation, and cleanup. That puts labor alone at $2,400 to $9,600 before materials. Natural stone veneer or full-thickness stone is slower to lay than brick, which pushes both time and cost higher — budget the upper end of the range for stone.
Clearances and permits: the rules that matter
Outdoor fireplaces are subject to the same clearance and setback rules as fire pits, plus additional structure-specific codes because you're building something tall and permanent. Most jurisdictions require a building permit for any outdoor fireplace, and the inspector will check footing depth, flue sizing, and clearances before signing off.
Typical clearance requirements (check your local code — these are IRC guidelines, not universal rules):
- Minimum 10 feet from the house, garage, or any combustible structure.
- Minimum 3 feet from property lines (some areas require 5 or 10 feet).
- No overhanging branches within 10 feet of the chimney top.
- Non-combustible hearth extending at least 16 inches in front of the firebox opening.
- Chimney height: at least 2 feet above any roof or structure within 10 feet horizontally.
Pulling a permit before you start means an inspector checks your footing depth, rebar placement, and flue sizing while you can still fix issues. Skipping the permit and building anyway is a gamble — if the city finds out later (neighbor complaint, insurance claim, home sale inspection), you could be forced to tear it down or bring it to code retroactively, which is expensive and embarrassing.
Stone veneer versus full-thickness stone
Most "stone" outdoor fireplaces you see today use manufactured or natural stone veneer over a brick or concrete-block core. The veneer is 1 to 3 inches thick, mortared to the outer face of the structure, and from 10 feet away it's visually identical to full-thickness stone. It's also lighter, faster to install, and costs 40 to 60% less than building the entire fireplace from quarried stone.
Full-thickness stone (where every stone is load-bearing) is traditional masonry and looks incredible up close, but it's a specialized skill that fewer masons do anymore, and it's slow — a full stone fireplace can take twice as long to build as a veneered one. If budget and time allow and you want heirloom quality, full stone is worth it. For most backyard projects, veneer gives you 90% of the look at half the cost and weight, which also means a smaller footing.
Common questions about outdoor fireplace cost
How much does it cost to add a gas line to an outdoor fireplace?
A natural-gas line hookup typically costs $800 to $2,500, depending on distance from your meter, local labor rates, and soil conditions. A 20-foot run on flat ground is on the low end; a 100-foot run across a sloped yard with rock or clay can push toward $2,500 or higher. The line has to be sized for the BTU load of your burner, and it must be pressure-tested and inspected, so this is always a licensed plumber or gas fitter job, not DIY. Propane is simpler — a flex line from an existing tank runs $300 to $700 installed — but you're responsible for tank refills.
Do I need a permit to build an outdoor fireplace?
In most jurisdictions, yes. Outdoor fireplaces are permanent structures with footings and chimneys, which puts them under building-code jurisdiction. Permits usually cost $100 to $300 and require an inspection of the footing, masonry work, and flue installation. Some rural areas with no building department may not require a permit, but you're still on the hook for meeting fire-clearance rules and setbacks. Call your local building department before you start — pulling a permit protects you if there's ever a code-enforcement complaint or an insurance claim after a fire.
Can you build an outdoor fireplace on a patio?
Yes, as long as the patio sits on a proper base and you add a reinforced concrete footing under the fireplace footprint. A standard paver patio on 4 to 6 inches of compacted gravel can support the weight, but you'll still need to excavate under the fireplace location, pour a footing below frost line, and pour a reinforced pad on top. You can't just set a fireplace on top of pavers and call it done — the weight will cause differential settling and cracking. If your patio is a concrete slab, you still want a thickened footing under the fireplace if it wasn't originally designed for that load. The patio cost calculator can help you figure the cost of adding or expanding a patio around a new fireplace.
How many bricks do I need for a small outdoor fireplace?
A small outdoor fireplace (36-inch firebox, 8 feet tall total including a 4-foot chimney) typically uses 450 to 600 standard modular bricks, plus another 60 to 80 firebricks for the firebox lining. The exact count depends on wall thickness (most fireplaces use double-wythe walls, meaning two layers of brick), chimney taper, and whether you're building solid or leaving a hollow cavity. The brick calculator gives you a precise count based on your wall dimensions, and the outdoor fireplace calculator is built specifically for fireplace geometry, including the taper from firebox to chimney.
The bottom line
Budget $2,000 to $6,000 for a prefab kit you assemble yourself, $3,000 to $8,000 for a DIY masonry build, and $8,000 to $20,000+ for a professionally built custom stone fireplace. Gas hookups add $800 to $2,500 for natural gas, or $300 to $700 for propane. The foundation is non-negotiable — a proper footing below frost line and a reinforced pad are what keep the fireplace from cracking and settling. Chimney height is a big cost driver; every extra foot adds material, labor, and time. Permits are required in most places, and clearances from structures and property lines aren't optional. A DIY brick fireplace is a realistic project if you've done masonry before and you're comfortable with firebox geometry and flue sizing; if not, hiring a mason gets you a structure that drafts properly and lasts. Run your dimensions through the outdoor fireplace calculator, brick calculator, and concrete calculator to lock down material counts, and pull a permit before you dig.