Best Radon Testing in San Antonio, TX
Compare 15 local radon testing providers in San Antonio. Verified listings with real contact info.
15 services listed
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AirMD San Antonio TX
321 W Josephine St, San Antonio, TX 78212
Monday: 8:30 AM – 6:00 PM | Tuesday: 8:30 AM – 6:00 PM | Wednesday: 8:30 AM – 6:00 PM | Thursday: 8:30 AM – 6:00 PM | Friday: 8:30 AM – 6:00 PM | Saturday: Closed | Sunday: Closed
2.8 ★
5 reviews
GreenWorks Inspections & Engineering - San Antonio TX
4040 Broadway Suite 240, San Antonio, TX 78209
Monday: 7:00 AM – 8:00 PM | Tuesday: 7:00 AM – 8:00 PM | Wednesday: 7:00 AM – 8:00 PM | Thursday: 7:00 AM – 8:00 PM | Friday: 7:00 AM – 8:00 PM | Saturday: 8:00 AM – 8:00 PM | Sunday: 8:00 AM – 8:00 PM
5 ★
363 reviews
The Home Depot
527 Fair Ave, San Antonio, TX 78223
Monday: 6:00 AM – 10:00 PM | Tuesday: 6:00 AM – 10:00 PM | Wednesday: 6:00 AM – 10:00 PM | Thursday: 6:00 AM – 10:00 PM | Friday: 6:00 AM – 10:00 PM | Saturday: 6:00 AM – 10:00 PM | Sunday: 8:00 AM – 8:00 PM
4.2 ★
3235 reviews
FRC Foundation Repair & Construction
1619 Sacramento St, San Antonio, TX 78201
Monday: 8:00 AM – 6:00 PM | Tuesday: 8:00 AM – 6:00 PM | Wednesday: 8:00 AM – 6:00 PM | Thursday: 8:00 AM – 6:00 PM | Friday: 8:00 AM – 6:00 PM | Saturday: 8:00 AM – 5:00 PM | Sunday: Closed
4.8 ★
63 reviews
Intertek PSI San Antonio
3 Burwood Ln, San Antonio, TX 78216
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
4.1 ★
21 reviews
The Home Depot
2658 SW Military Dr, San Antonio, TX 78224
Monday: 6:00 AM – 10:00 PM | Tuesday: 6:00 AM – 10:00 PM | Wednesday: 6:00 AM – 10:00 PM | Thursday: 6:00 AM – 10:00 PM | Friday: 6:00 AM – 10:00 PM | Saturday: 6:00 AM – 10:00 PM | Sunday: 8:00 AM – 8:00 PM
4.1 ★
3075 reviews
DEKD Environmental Testing & Consulting South
7411 Barlite Blvd #240014, San Antonio, TX 78224
Monday: 6:00 AM – 8:00 PM | Tuesday: 6:00 AM – 8:00 PM | Wednesday: 6:00 AM – 8:00 PM | Thursday: 6:00 AM – 8:00 PM | Friday: 6:00 AM – 8:00 PM | Saturday: 9:00 AM – 7:00 PM | Sunday: 12:00 – 7:00 PM
5 ★
9 reviews
A-Pro Northwest San Antonio Home Inspection
5100 Northwest Loop 410 Apt 2601, San Antonio, TX 78229
Monday: Open 24 hours | Tuesday: Open 24 hours | Wednesday: Open 24 hours | Thursday: Open 24 hours | Friday: Open 24 hours | Saturday: Open 24 hours | Sunday: Open 24 hours
5 ★
51 reviews
Braun Intertec Corporation
7300 Blanco Rd STE 610, San Antonio, TX 78216
Monday: 8:00 AM – 5:00 PM | Tuesday: 8:00 AM – 5:00 PM | Wednesday: 8:00 AM – 5:00 PM | Thursday: 8:00 AM – 5:00 PM | Friday: 8:00 AM – 5:00 PM | Saturday: Closed | Sunday: Closed
4 ★
1 reviews
Astex Environmental Services
139 Braniff Dr, San Antonio, TX 78216
4.4 ★
7 reviews
A-Pro Home Inspection Austin
501 Skyforest Dr, San Antonio, TX 78232
Monday: Open 24 hours | Tuesday: Open 24 hours | Wednesday: Open 24 hours | Thursday: Open 24 hours | Friday: Open 24 hours | Saturday: Open 24 hours | Sunday: Closed
5 ★
218 reviews
A-Pro Home Inspection San Antonio
1141 TX-1604 Loop #105, San Antonio, TX 78232
Monday: Open 24 hours | Tuesday: Open 24 hours | Wednesday: Open 24 hours | Thursday: Open 24 hours | Friday: Open 24 hours | Saturday: Open 24 hours | Sunday: Open 24 hours
4.6 ★
117 reviews
Forensic Home Inspections
401 E Sonterra Blvd Suite 375, San Antonio, TX 78258
Monday: 9:00 AM – 7:00 PM | Tuesday: 9:00 AM – 7:00 PM | Wednesday: 9:00 AM – 7:00 PM | Thursday: 9:00 AM – 7:00 PM | Friday: 9:00 AM – 7:00 PM | Saturday: 9:00 AM – 7:00 PM | Sunday: 9:00 AM – 7:00 PM
Noble Property Inspections
28905 Throssel Ln, San Antonio, TX 78260
Monday: 7:30 AM – 7:00 PM | Tuesday: 7:30 AM – 7:00 PM | Wednesday: 7:30 AM – 7:00 PM | Thursday: 7:30 AM – 7:00 PM | Friday: 7:30 AM – 7:00 PM | Saturday: 7:30 AM – 7:00 PM | Sunday: 7:30 AM – 7:00 PM
4.2 ★
17 reviews
A-Pro Home Inspections New Braunfels
410 W San Antonio St, New Braunfels, TX 78130
Monday: 8:00 AM – 8:00 PM | Tuesday: 8:00 AM – 8:00 PM | Wednesday: 8:00 AM – 8:00 PM | Thursday: 8:00 AM – 8:00 PM | Friday: 8:00 AM – 8:00 PM | Saturday: 8:00 AM – 8:00 PM | Sunday: 8:00 AM – 8:00 PM
5 ★
135 reviews
Frequently Asked Questions
How much does radon testing cost in Texas?
Professional radon testing typically costs $175 to $350. Short-term tests (48-96 hours) are used for real estate transactions. Long-term tests (90+ days) provide the most accurate annual average. The EPA recommends professional testing over DIY kits for real estate transactions, though DIY kits ($20-$40) are available at hardware stores. TCEQ publishes county-level radon data for Texas.
Why is radon especially concerning in Texas?
Texas has varying radon levels depending on geology. Measurable radon occurs statewide, including in metro areas, with higher readings more commonly mapped in Hill Country and granite/limestone geology due to bedrock composition. TCEQ considers radon a public health concern and publishes county-level radon data.
Are radon testers required to be certified in Texas?
Texas does not mirror every state's radon-specific license scheme; TCEQ's consumer radon materials and professional organizations like the National Radon Proficiency Program (NRPP) or National Radon Safety Board (NRSB) point homeowners toward certified measurement professionals. For real estate transactions, use a certified professional so the report meets common lender and liability expectations.
What happens if my Texas home has high radon levels?
If radon levels exceed 4 pCi/L, the EPA and TCEQ recommend installing a radon mitigation system. Sub-slab depressurization is the most effective method and typically costs $1,000 to $2,000. Use an experienced mitigator—often NRPP- or NRSB-listed—and expect post-mitigation testing. Mitigation commonly reduces levels by up to 99%.
When should I test for radon in my Texas home?
TCEQ recommends testing all homes, especially where geology suggests higher potential. Test when buying or selling, after major renovations affecting the foundation, or if you have never tested. Testing during cooler months (November through March) with windows closed provides the most representative results. Re-test every 2 years or after major changes to the home.