Sherman Oaks, CA Radon Levels
Check local Sherman Oaks radon levels and find certified testing and mitigation professionals to keep your home safe
Sherman Oaks, CA Radon Facts
EPA Radon Zone
Zone 2 — Moderate Risk
2–4 pCi/L (Zone 2)
County
Los Angeles County, CA
Zip Code
91403
Sherman Oaks in Los Angeles County sits in the San Fernando Valley, where the Mediterranean climate and sedimentary geology contribute to generally lower radon levels typical of Southern California. This established neighborhood features mid-century homes and modern construction, predominantly built on concrete slab foundations with minimal basement construction. While radon testing data is limited for zip codes 91403 and 91423, California's overall lower radon potential makes the area relatively low-risk.
Sherman Oaks, CA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Radon FAQ for Sherman Oaks, CA
What EPA Radon Zone is Sherman Oaks in?
Sherman Oaks and the 91403 zip code are in Los Angeles County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.
How much does radon mitigation cost in Sherman Oaks?
Radon mitigation in Sherman Oaks typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
Should I test for radon if I'm buying a home in Sherman Oaks?
Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.
Most Active Radon Markets in California
Cities in California with the most user-submitted radon test data, ranked by number of submissions.
| City | Avg User Radon Level | Submissions |
|---|---|---|
| Los Angeles | 7.83 pCi/L | 6 |
| Mammoth Lakes | 10.80 pCi/L | 5 |
| San Jose | 4.20 pCi/L | 5 |
| Rancho Palos Verdes | 8.00 pCi/L | 4 |
| Bishop | 6.25 pCi/L | 4 |
| Oakland | 5.00 pCi/L | 4 |
| Woodland Hills | 7.67 pCi/L | 3 |
| South Lake Tahoe | 6.33 pCi/L | 3 |
| Palos Verdes Peninsula | 6.00 pCi/L | 3 |
| Sacramento | 4.33 pCi/L | 3 |