Building a backyard fire pit comes down to one decision that matters more than the style of stone or steel you choose: where it sits and what it sits on. Get those two things right and the rest is straightforward. Get them wrong and you’re risking your house, your fence, and your neighbor’s good will. Most residential fires involving fire pits start because the pit was too close to something flammable or sat directly on a surface that could catch.
Choosing a Safe Location
Setbacks are the single most important part of planning. Check your city or county rules before you buy materials, because local ordinances can be stricter than the general guidance.
You also need clearance above and around the pit. Keep it away from overhanging branches, eaves, rooflines, string lights, and power lines.
Preparing the Base
The ground under the pit must be level and non-combustible. A pit set directly on grass or soil can smolder for hours after the flames die, and dry grass catches easily. Patio blocks, bricks, concrete pavers, or a poured concrete slab all work well. Gravel can work, but only if it’s a thick layer over compacted earth. If you’re using a portable pit, place it on brick or stone — never directly on a wood deck.
One detail people often miss: smooth river stones are a poor choice for the base ring because they retain moisture and can crack or explode when heated. Dry, rough-cut stone is the safer pick.
Building and Using Your Fire Pit
A permanent pit can be built into the ground or above it with brick or stone.
Use only clean, dry, seasoned wood. Never burn garbage, yard waste, plastic, construction scraps, or treated or painted wood, which release toxic fumes. Skip accelerants like gasoline or kerosene; use a lighter or a chimney starter instead. Keep water, a hose, or an extinguisher within reach and never walk away from a burning fire.
Important Safety Rules
- Check for burn bans and air-quality alerts before lighting; wind and dry conditions often trigger no-burn days.
- Extinguish the fire completely before leaving it, and cool the ashes in a metal container with a tight-fitting lid.
- Never light a fire under trees, branches, power lines, or eaves.
Gas-fueled pits have their own rules, and some codes require certification from a nationally recognized testing agency, especially for public or shared spaces. Check your local regulations before buying one.
If you’re shopping for a pit rather than building one from scratch, our roundup of the best backyard fire pits compares top-rated models for different yard sizes and fuel types.
FAQs
Can a fire pit sit on a wooden deck?
No. A portable fire pit needs a fire-proof base like brick or stone, and it should never sit directly on wood decking. Use a fire-resistant mat or paver base beneath the pit, and keep it well away from railings, furniture, and any overhanging structure. Check your deck’s weight limits and your local codes before setting anything up.
What is the safest distance from a house for a fire pit?
Distance requirements vary by city and fire district, so verify your local ordinance before you build. Also maintain clearance from fences, trees, and overhead branches.
What should you burn in a backyard fire pit?
Burn only clean, dry, seasoned firewood. Avoid garbage, yard waste, plastic, construction materials, and treated or painted wood, which release harmful fumes. Never use gasoline or kerosene to start the fire. Keep the fire small enough to stay within local size limits, and keep a spark screen in place.
References & Sources
- U.S. Fire Administration. “Outdoor Fire Safety.” Provides general setback and safe-burning guidance for outdoor fires.
- U.S. Environmental Protection Agency. “Backyard Recreational Fires.” Advises on safe fuels, siting, and air-quality considerations.