How to Build a Simple Outdoor Fire Pit This Weekend
- Budget: $75-$150 for a stacked-stone fire pit using retaining wall blocks.
- Time: One afternoon — no masonry experience or mortar needed.
- Safety first: Place at least 10-25 feet from structures; check local fire codes.
- Size: 36-44 inch diameter, 3-4 courses of blocks on a gravel base.
- Surroundings: Extend gravel or pavers 3+ feet around the pit to prevent sparks.
Building a simple fire pit is one of the easiest and most rewarding DIY projects you can do in a single afternoon. A backyard fire pit transforms your outdoor space from a place you look at into a place you actually use. It’s where stories get told, marshmallows get roasted, and cold evenings become magical. I built mine on a Saturday morning and we were roasting s’mores by that evening — it’s that straightforward. According to the National Fire Protection Association, proper placement and construction are the keys to safe backyard fire pit use.
Where Should You Place Your Fire Pit?
Place your fire pit at least 10 feet from any structure, fence, or overhanging tree — and always check your local fire codes first. Many areas require 15 to 25 feet of clearance and may require a permit. Choose a level spot on bare ground, gravel, or pavers. Never build a fire pit on a wooden deck. I chose a spot that’s visible from our kitchen window so we can enjoy the glow even from inside on cold nights.
How Do You Build a Stacked Stone Fire Pit?
The stacked stone method is the simplest — just dry-stack retaining wall blocks in a ring on a gravel base, no mortar required. A 36 to 44 inch diameter circle using 3 to 4 courses of blocks is the most common size. A basic fire pit using 30 to 40 blocks costs $75 to $150 depending on the block style.
- Mark a circle on the ground using a stake, string, and spray paint.
- Dig out the circle 6 inches deep and fill with 4 inches of pea gravel for drainage.
- Lay the first course of blocks in a ring, checking for level.
- Stack 2 to 3 more courses, staggering the joints for stability.
- Optional: Apply construction adhesive between courses for permanence.
| Materials | Estimated Cost | Notes |
|---|---|---|
| Retaining wall blocks (30-40) | $50-$100 | Flat-faced blocks stack best |
| Pea gravel (2-3 bags) | $10-$15 | For base drainage |
| Construction adhesive | $5-$8 | Optional but recommended |
| Surrounding gravel/pavers | $15-$30 | 3-ft spark buffer zone |
| Total | $75-$150 | Compared to $300-$1,000+ for prefab |
Surround your fire pit with gravel, pavers, or crushed stone extending at least 3 feet in all directions to prevent grass fires from stray sparks. Add some Adirondack chairs or log benches, and you’ve created the new favorite spot on your property. A fire pit pairs perfectly with a cozy homestead evening — bring out some homemade sourdough bread and bone broth for the ultimate fall gathering. The This Old House team has additional construction tips if you want to get fancy. For more DIY projects, check out our DIY chicken coop guide or rainwater harvesting setup.
Frequently Asked Questions
It depends on your municipality. Many areas allow fire pits under a certain diameter (typically 3 feet) without a permit, but setback requirements from structures vary. Always check your local fire code before building — a quick call to your local fire department is the easiest way to find out.
Use fire-rated bricks or retaining wall blocks designed for heat exposure. Standard clay bricks can crack or even explode when exposed to high heat due to moisture trapped inside. Concrete retaining wall blocks are generally safe for open fire pits.
Hardwoods like oak, maple, and hickory burn longer and produce less smoke. Avoid softwoods like pine (too much spark and creosote) and never burn treated lumber, painted wood, or trash. Seasoned (dried 6+ months) wood burns best.
Let the fire burn down to embers, spread them out with a poker, douse with water until hissing stops, and stir ashes. Never leave a fire unattended, and always have a hose, bucket of water, or fire extinguisher nearby.
