Last updated 2026-08-18
TL;DR
Alabama does not require a state radon mitigation license. The Alabama Department of Public Health runs a radon program but does not certify or license contractors. Hire an NRPP or NRSB certified mitigator instead. A typical system costs $800 to $2,500 and installs in one day. Confirm local business and permit rules with the county or city before you quote a job.
Do you need a license for radon mitigation in Alabama?
No. Alabama does not issue a state radon mitigation license. The Alabama Department of Public Health runs a radon information program, but it does not certify or license mitigation contractors [2]. There is no Alabama radon board, no state exam, and no state contractor number to renew.
That makes Alabama an easy state to enter. It also means the homeowner carries more of the checking. The credential the market actually uses is an NRPP or NRSB mitigation certification, and you can confirm a company's active number in the public directories [3][4]. A city or county business privilege license may still apply, so call the county probate office or the city revenue department before you hang a shingle.
Radon is a health problem, not a paperwork drill. The U.S. EPA calls radon the second leading cause of lung cancer in the United States [6][7]. Alabama has no state mandate to fix it. That gap is exactly why the license question confuses people.
How does Alabama regulate radon work?
Lightly, and mostly at the local level. Alabama has no radon-specific statute that requires a mitigation contractor license. The Alabama Department of Public Health radon page points to testing guidance and EPA resources and runs no certification or registration program [2]. No state inspector checks your system. No state fee schedule exists.
The real gates are local. A county or city may require a business privilege license. The permitting office may want a building permit if you cut into a slab or alter a crawlspace. That is general building work, not a radon license. Confirm the local rules before bidding, because a state-level answer will not satisfy a city inspector.
Alabama does not regulate the radon trade at the state level. It regulates the building alteration the way it regulates any home repair, through the local jurisdiction.
Which national certifications matter in Alabama?
NRPP and NRSB are the two names that carry weight here, because Alabama has no state credential to compete with them. NRPP is the certification arm of the American Association of Radon Scientists and Technologists. NRSB is the National Radon Safety Board. Both publish searchable directories where a homeowner or agent can check a contractor by name or company [3][4].
I would start with the NRPP mitigation credential. The exam covers fan sizing and pressure field extension, plus electrical and post-mitigation testing. That is the credential most Alabama real estate work cites. NRSB certification works too if the contractor holds it, though it shows up less often in my searches.
These are training and certification programs, not state licenses. You can hold an NRPP number and still lack a local business license. Check both.
How much does radon mitigation cost in Alabama?
Expect $800 to $2,500 for a standard single-family system. The U.S. EPA's Consumer's Guide to Radon Reduction says, "The cost of fixing a home generally ranges from $800 to $2,500, with an average cost of $1,200" [1]. Alabama publishes no separate state dataset, so use that as the honest range.
| EPA figure | Cost |
|---|---|
| Low end | $800 |
| Average | $1,200 |
| High end | $2,500 |
For an Alabama slab ranch, most quotes land between $1,200 and $1,500. A crawlspace with a membrane and sub-membrane suction runs higher, usually $1,800 to $2,500. A finished basement with cosmetic repair can cross $3,000. Those Alabama bands come from contractor pricing patterns, not a state fee table, so treat them as planning numbers and get site-specific bids.
No Alabama law sets a maximum or minimum price. The state will not quote for you and will not inspect to confirm the fan was sized right. The spread is usually labor, access, and whether a diagnostic test is included.
Why do Alabama radon bids vary this much?
Foundation type drives most of the spread. A slab on grade usually needs one suction point. A crawlspace needs a membrane, sealing, and sometimes two or three suction points, which adds material and labor. Fan type, pipe routing, and electrical access move the number again.
A company that includes pressure field extension testing, a post-mitigation test, and a follow-up visit costs more than a one-day crew that leaves pipe and no report. Alabama has no state price schedule, so the market lets a careful contractor charge $2,000 and a skip-steps crew charge $900 for the same floor plan.
Get itemized bids. Ask what the post-mitigation target is and who pays if the system misses it. In Alabama, with no board to complain to, the contract is the only enforcement tool you have.
How long does radon mitigation take in Alabama?
One day in most houses. The U.S. EPA's guide says most radon reduction systems install in a single day [1]. A standard slab depressurization job on an Alabama ranch runs 4 to 8 hours. Crawlspace work runs longer, sometimes two days, because of the membrane work and sealing.
Do not confuse installation with the full paper turnaround. The post-mitigation test starts after the fan runs long enough to stabilize, and the lab report adds time. Alabama imposes no state waiting period. In a real estate deal, plan for a few extra days between install and a clean lab report.
Weather delays hit Alabama less than northern states, but rain can slow crawlspace sealing. If you need a guaranteed close date, add a buffer and ask whether the company files lab reports electronically.
What does the Alabama mitigation paper path look like?
Start with a real pre-mitigation test. EPA's map puts much of Alabama in Zone 3, with some northern counties in Zone 2 [5]. A test at or above 4.0 pCi/L is the EPA action level for mitigation [6]. Alabama has no state law forcing a homeowner to fix it, but real estate deals and public health guidance use that number.
After the system goes in, keep five pieces of paper: the signed contract, the fan installation sheet, the pre-test report, the post-test report, and any local permit. That file is your only proof in a state with no board to inspect or issue a sticker.
A post-mitigation report showing a 9.0 pCi/L pre-test dropped to 1.6 pCi/L is the real deliverable. The pipe on the roof is not. If the number does not clear 4.0 pCi/L, the system is not done.
Does Alabama require radon testing when you sell a house?
No. Alabama has no state law requiring a radon test as part of a home sale. A buyer can ask for one, and a lender may want the results if a test already exists. The EPA recommends testing all homes below the third floor regardless of the map zone [5].
A seller with a pre-test report showing 3.8 pCi/L can end that table conversation fast. A seller who refuses a test may lose a buyer to another offer. In Alabama, where many homes sit in Zone 3, a buyer may not think to ask, but the buyer's inspector often does.
When a sale falls apart over radon, it is rarely the number alone. It is the missing post-mitigation result or an install that looks unlicensed. Paper fixes that.
How Alabama compares with licensed states
Alabama sits on the no-license end. Colorado runs a formal radon mitigation program that sets licenses, fees, and education hours. Alabama has none of that. The practical result is that an Alabama contractor's market credential is NRPP or NRSB. A license from a regulated state will not transfer, because Alabama has no counterpart to accept it.
That does not make the work simpler. It moves the sorting to the buyer's side. The state will not reject an unqualified contractor, so the homeowner has to read the directory. If you also work in a regulated state, see radon mitigation license in Colorado. For other state quirks, radon mitigation license in Alaska and radon mitigation license in Arizona show how far the rules swing. If you operate in a larger market with its own path, see how to start radon mitigation in California.
Lower regulatory friction in Alabama is real, and it cuts both ways.
What should a homeowner check before hiring in Alabama?
Pull the NRPP or NRSB number first, then enter it in the directory yourself [3][4]. The U.S. EPA also runs a tool for finding certified measurement and mitigation professionals [8]. Alabama has no state phone line that does this for you, so you read the directory.
Ask for proof of insurance and a written warranty. Ask whether the price includes a manometer, pressure field extension testing, and a post-mitigation test. If the contractor skips the diagnostic or claims a single suction point always works, keep looking.
RadonPath sells a $149 one-time NRPP Mitigation Kit at /start. It packages the exam-focused files for contractors entering the trade. It is not an Alabama license and not a state approval. It will not replace the national certification or a local business license.
Get the quote in writing. Alabama has no statutory cooling-off period for this kind of home improvement, so the written contract and the post-test report are the only proof you hold.
What should an Alabama contractor keep in first-year files?
Start with the local business privilege license, the insurance certificate, the NRPP or NRSB credential, and calibration records for any manometer and fan-test equipment. Alabama has no board that mails you a renewal notice, so the file is on you.
For each job, keep the pre-test, design calculations, contract, photos, fan data plate, post-test, and lab report. That file is your defense if a client sells the house years later. Alabama has no state record retention rule for radon, so set your own. I keep records for at least 10 years. It sounds long until a radon question shows up at resale.
Building the first-year sequence? Read how to start radon mitigation in Alabama. The first-year cost driver in Alabama is not a license fee, because there is none. It is the equipment, the insurance, and the time it takes to get certified and actually booked.
Bottom line: Alabama has no radon license, but the paper still matters
Alabama has no state radon mitigation license, no state radon board, and no state fee table. The real paper path is a local business privilege license, proof of insurance, an NRPP or NRSB mitigation certification, an itemized bid, and a post-mitigation lab report. Cost runs $800 to $2,500, and most installs finish in one day [1].
Want the exam-facing files in one place? RadonPath's $149 one-time NRPP Mitigation Kit at /start collects them. It is not a state approval and not legal advice. Confirm any local permit or business license requirement with the county or city before you cut anything.
Frequently asked questions
Do you need a license for radon mitigation in Alabama?
Alabama does not issue or require a state radon mitigation license. The Alabama Department of Public Health runs a radon information program but keeps no certification or contractor registry [2]. A homeowner should still look for NRPP or NRSB mitigation certification, and a city or county business privilege license may apply. Confirm local rules with the county or city revenue office before you bid.
How much does radon mitigation cost in Alabama?
Expect $800 to $2,500 for a standard single-family system, with a national average near $1,200 [1]. Alabama has no official state price dataset. Slab systems usually run $1,200 to $1,500; crawlspace systems with a membrane run $1,800 to $2,500. Get site-specific quotes, because access and fan size move the final price.
How long does radon mitigation take in Alabama?
Most Alabama mitigation jobs install in one day, usually 4 to 8 hours for a standard slab depressurization system [1]. Crawlspace work can take two days. The post-mitigation test and lab report add a few extra days in a real estate transaction, so plan for the full sequence, more than the pipe install.
Is radon testing required in Alabama when selling a home?
No. Alabama has no state law requiring a radon test in a home sale. Buyers may ask for one, and EPA recommends testing all homes below the third floor [5]. A loan program may require it if a test is already in the file. The contract and inspection add-on decide whether a test happens.
What radon level triggers mitigation in Alabama?
The EPA action level is 4.0 pCi/L [6]. Alabama sets no lower state threshold. EPA also says no level is completely safe, so some homeowners fix at 2.0 pCi/L or above. For most Alabama transactions, 4.0 pCi/L is the trigger used in home inspections.
Can a homeowner install their own radon mitigation in Alabama?
Alabama law does not stop a homeowner from doing their own mitigation, because there is no state radon license. That does not make it a good DIY job. Slab hole placement, fan sizing, and pressure field testing all shape the result. A botched system can make a home look fixed while leaving one room high.
How do I check an Alabama radon contractor's certification?
Search the NRPP or NRSB directory by name or company [3][4]. Ask the contractor for the certification number and expiration date, then verify it yourself. Alabama has no state registry, so do not take a badge or a truck decal as proof.
Is NRPP or NRSB better for Alabama?
NRPP is the more common requirement in Alabama real estate work, but NRSB is a recognized certification too. Both test the same core skills. If a contractor holds only one, ask whether their training covered pressure field extension testing and post-mitigation protocol. Either is fine if the number is active.
Does Alabama require post-mitigation testing?
Alabama has no state law requiring post-mitigation testing. Certification standards and good practice require it. The post-test is the only way to prove the system reduced the indoor level. Skip a contractor who refuses to include one or claims the manometer reading alone is enough.
Can an out-of-state certified radon contractor work in Alabama?
Yes, because Alabama has no state radon license. An out-of-state contractor with an active NRPP or NRSB credential can work in Alabama. A local city or county business privilege license may still apply. Confirm with the county probate office or city revenue department before the job starts.
What local permits might Alabama radon mitigation need?
Alabama has no unified state radon permit. A city or county may require a building permit if the job involves cutting a slab or altering a crawlspace. Some jurisdictions only want a business privilege license. Ask the local building office before you start, because state-level radon guidance will not answer that.
Does Alabama have radon-resistant new construction requirements?
Alabama has no statewide radon-resistant new construction code requirement. EPA recommends radon-resistant features in all new homes in higher-radon areas. Some local jurisdictions may adopt them by code, so check the city building code. Most production builders in Alabama do not include them by default.
Where can I find current Alabama radon guidance?
Current Alabama radon guidance lives on the Alabama Department of Public Health radon program page [2]. For certification status, check the NRPP or NRSB directories. For cost and system basics, follow EPA's Consumer's Guide to Radon Reduction [1]. Confirm local permits with the city or county.
Sources
- U.S. EPA, Consumer's Guide to Radon Reduction: Fixing Your Home: Radon mitigation systems typically cost $800 to $2,500, average $1,200, and can be installed in one day.
- Alabama Department of Public Health, Radon Program: Alabama has no state radon mitigation certification or license program; the state provides radon testing information.
- NRPP, Find a Radon Professional: NRPP maintains a searchable directory of certified radon measurement and mitigation professionals.
- NRSB, Find a Certified Professional: NRSB maintains a searchable directory of certified radon professionals.
- U.S. EPA, EPA Map of Radon Zones: Much of Alabama falls in EPA Radon Zone 3, with some northern counties in Zone 2.
- U.S. EPA, Health Risk of Radon: Radon is the second leading cause of lung cancer in the United States; EPA uses 4.0 pCi/L as the action level.
- CDC, Radon and Your Health: Radon is the second leading cause of lung cancer after smoking.
- U.S. EPA, Find a Radon Test Kit or Measurement and Mitigation Professional: EPA provides a directory tool for locating certified radon measurement and mitigation professionals.