❓ Propane Tank Permit FAQ

Usually yes — but it depends on your tank size, whether it's above-ground or underground, and your county's rules. Underground tanks always require a permit everywhere. Above-ground tanks typically require a permit at 125 gallons and above in most counties. Even where no tank permit is required, a gas piping permit for the supply line is almost always needed. Call your county building or fire department to confirm before proceeding. Full permit basics guide →

In many counties, above-ground tanks under 125 gallons don't require a dedicated LP tank installation permit. Portable exchange cylinders (grills, small heaters) require no permit at any size. Underground tanks always require a permit regardless of size. Even if your tank is exempt, the gas piping connecting it to your home likely requires a permit. Full threshold guide →

Most residential above-ground LP tank permits cost $50–$150. Underground permits run $75–$200. There is usually also a gas piping permit at $25–$75. Total for a typical above-ground installation: $75–$225. Rural counties often have lower fees; major cities trend toward the high end. Full fee guide by state →

Online portals in larger cities: same-day to 3 business days. In-person suburban counties: often same-day for routine residential installations. Underground installations requiring plan review: 3–10 business days. Rural areas: variable, sometimes up to 2 weeks. Apply at least 2 weeks before your installation date to avoid delays.

If you lease the tank from a propane supplier, they typically handle permits as part of their installation service. If you own the tank outright and hire an independent LP gas contractor, either you or the contractor can pull the permit — clarify this in your contract. Regardless of who applies, the permit is issued to the property address and is the property owner's ultimate responsibility.

NFPA 58 minimum: 10 feet from any building wall, window, door, or ignition source for tanks under 500 gallons. 25 feet for tanks 500–2,000 gallons. Measured from the tank's outer shell to the nearest point of each feature. Your local AHJ may require more. Use our Setback Calculator for exact distances. Full setback guide →

Yes. Your outdoor AC condenser unit contains electric motors and contactors that can spark, making it an ignition source under NFPA 58. The same setback required from building openings (10 feet for tanks under 500 gal) applies to your AC unit. This is one of the most common setback violations found during inspections.

NFPA 58 does not specifically address fences. A standard fence is not a "building" requiring the structural setback. However, if the fence is at the property line, the property line setback (10 feet for tanks under 500 gal) applies to the line itself. Fences also restrict ventilation around the tank — most inspectors and AHJs require clear access from at least three sides.

Yes — always, everywhere, regardless of size or jurisdiction. There are no exceptions. Underground LP gas tanks require a permit because of their corrosion risk, invisible leak potential, groundwater contamination risk, and the engineering requirements (cathodic protection, vent piping, pre-backfill inspection) that must be verified before the tank is covered. Full underground permit guide →

Cathodic protection is a corrosion prevention system required for all underground propane tanks. It uses sacrificial magnesium or zinc anode bags attached to the tank that corrode preferentially, protecting the tank's steel from underground corrosion. Required by NFPA 58 for all underground LP gas tanks. Must be tested periodically (typically every 3 years) to verify the anodes are still functional.

For underground tank installations, an inspection that must occur before any soil is placed over the installed tank. The building or fire inspector visits the site to verify tank depth, cathodic protection installation, setback distances, and vent pipe routing while the tank is still visible. You cannot cover the tank until this inspection is approved. Schedule it on installation day — do not backfill without it.

NFPA 58 requires the top of the tank to be at least 6 inches below finished grade. The bottom must sit on stable bedding material. In cold climates, local codes often require the bottom of the tank to be below the frost line (which ranges from 12 inches in the Deep South to 60+ inches in northern Minnesota). Your installer and local building department will specify the required depth for your location.

Texas has no statewide residential LP tank permit law. Rules are county-by-county. Inside city limits of major Texas cities, a permit is required. In rural unincorporated Texas counties that have not adopted a building code, no permit may be required for above-ground tanks. Regardless of permit status, your installer must hold a Texas Railroad Commission LP Gas Dealer license. Full Texas guide →

Florida (75-foot setback from potable water sources, strict aquifer protection), Pennsylvania (50-foot well setback, statewide UCC enforcement), Virginia (50-foot well setback), Michigan (50-foot well setback, EGLE environmental oversight), and Minnesota (50-foot well setback, deep frost line requirements) have the most stringent underground LP gas tank regulations among the states covered in this guide. State guides →

Setback distances (measured with a tape measure), tank placement and surface, required labeling ("LP GAS," "FLAMMABLE," capacity), operable shutoff valve, correct pressure regulator, gas line connections and pressure test results, guard posts if required, and flood anchoring if applicable. For underground tanks: vent pipe termination height and location, fill connection accessibility, and cathodic protection documentation. Full inspection guide →

You receive a written correction notice identifying what doesn't comply. Your contractor corrects the issues and you request a re-inspection. Re-inspection fees vary by jurisdiction ($0–$75). Do not fill or use the tank until the inspection passes and the permit is closed. Most common failures: insufficient setback from AC unit, missing guard posts, or a failed pressure test.

If discovered, you may be fined, required to obtain a retroactive permit (often at 2-3× normal fee), and required to have the installation inspected. If it doesn't pass, corrections are required at your expense. More seriously: your homeowner's insurance may deny fire and explosion claims for an unpermitted LP installation, and the unpermitted installation creates disclosure and title issues at property sale.

For any tank connected to your home's gas distribution system, no. Every state requires a licensed LP gas contractor for permanent residential installations. Homeowner self-installation is not permitted and permits will not be issued to unlicensed property owners for this work. Small portable exchange cylinders (grills) are exempt. Full licensed installer guide →

Ask for their state LP gas dealer or contractor license number and look it up through your state's LP gas regulatory agency online license search. In Texas, this is the Railroad Commission. In Ohio, the State Fire Marshal. In Florida, FDACS. In most states, a Google search for "[state] LP gas contractor license lookup" will take you directly to the verification tool. Verify before signing any contract.

Completed permit application form, site plan showing tank location with measured setback distances, tank manufacturer's specification sheet, licensed contractor information (name, license number), and permit fee. For underground tanks: also 811 utility clearance confirmation, cathodic protection plan, and vent pipe routing diagram. Full application guide →

Only if excavation is involved — which means underground tank installation and trenching for the buried gas supply line. 811 is the national "call before you dig" number. Required by law in all 50 states for any excavation. Call at least 3 full business days before digging. Above-ground tank installations with no excavation do not require an 811 call for the tank itself, but if the gas supply line runs underground to the house (which it usually does), call 811 before that trench is dug.

Yes. Notify your insurance carrier when your LP gas system is installed and pass inspection. Many policies include requirements for permitted installation of fuel-burning equipment. An unpermitted installation can jeopardize your coverage. Disclosure also helps if you ever need to file a claim related to the system. For underground tanks, also check whether your policy covers environmental remediation in the event of a leak — policies vary significantly on this.

Most residential building permits are valid for 12 months from issuance, with work required to begin within 180 days in most jurisdictions. If your installation is delayed beyond the permit's validity period, you'll need to renew or reapply (typically 50% of the original fee). Don't let a permit expire before installation is complete — working under an expired permit has the same consequences as unpermitted work.

Yes, but it is treated as a new installation for permit purposes if the tank is being replaced. When you switch from a leased tank (owned by the supplier) to a customer-owned tank, the new tank must be permitted and inspected just like any new installation. If you are simply purchasing ownership of the same physical tank that is already installed and permitted, no new permit is typically required — but confirm with your county. Once you own the tank, you are responsible for all future permit and maintenance obligations.

An oil-to-propane conversion typically requires: oil tank removal permit (especially for underground oil tanks), LP tank installation permit, gas piping permit, and mechanical permit for the new propane furnace or boiler. In some cases, also an appliance venting permit if PVC sidewall venting is installed instead of using the existing chimney. These must be done in a specific sequence — remove oil infrastructure before installing propane. Full oil-to-propane checklist →