Montgomery County Rental Radon Testing | Bill 26-22 Compliance
Montgomery County Rental Radon Testing & Bill 26-22 Compliance
Professional 48-hour radon testing and clear reports for landlords, rental property owners, and property managers in Montgomery County, Maryland.
Flexible scheduling from 7 AM–9 PM, including Saturdays and Sundays.
Does Your Montgomery County Rental Property Need a Radon Test?
Montgomery County Bill 26-22 establishes radon testing and disclosure requirements for qualifying ground-contact and basement rental units. Landlords must obtain qualifying test results before signing a new lease and provide required documentation to tenants.
Rental Radon Test-Result Window
For covered units, radon test results must be less than three years old at lease signing. The landlord must provide results and required radon information to the tenant.
Separate City Requirement
Rockville’s ordinance requires test results less than two years old at lease signing for covered ground-contact and basement rental units.
Requirements depend on property jurisdiction, unit type, and circumstances. Confirm whether your property is within Rockville city limits or another municipality with separate rules.
Professional Radon Testing for Landlords
Convenient Appointments
Arrange monitor placement around tenant access, property turnover, and leasing schedules.
48-Hour Monitoring
We use professional continuous radon monitors to measure indoor radon concentrations during the testing period.
Documented Results
Receive a professional report for your records and for sharing with the tenant as applicable.
What Happens if a Rental Property Tests High for Radon?
Understand the 14-Day Follow-Up and 90-Day Mitigation Requirements
Under Montgomery County’s rental radon law, when an existing tenant provides notice of a result at or above 4.0 pCi/L, the landlord must initiate follow-up testing within 14 days after receiving notice.
If elevated radon is confirmed, the landlord must mitigate within 90 days after confirmation and provide professional results showing the level has been reduced below 4.0 pCi/L.
Alfa Air Agency offers radon mitigation system installation and post-mitigation testing services. Contact us promptly to discuss your property, test results, and scheduling needs.
Why Landlords Choose Alfa Air Agency
NRPP-Certified Testing
Professional testing performed with continuous radon monitoring equipment.
Weekend & Evening Scheduling
Appointments available from 7 AM to 9 PM, seven days a week.
Clear Reporting
Documented results that landlords can retain and share as part of their rental records.
Testing & Mitigation
One local company for initial testing, mitigation installation, and post-mitigation verification services.
Rental Property Radon Testing FAQs
Is radon testing required for every rental unit in Montgomery County?
No. The county’s rental radon requirements apply to specified ground-contact and basement dwelling units. The applicability of local requirements should be confirmed for each property.
Do landlords need a new radon test every three years?
The county requires qualifying test results from within three years before a covered lease is signed. This is a lease-related test-result window, not necessarily a universal requirement to retest every occupied unit every three years.
Is Rockville’s requirement different?
Yes. The City of Rockville has a separate ordinance with a two-year test-result window for covered rental units.
Can Alfa Air Agency issue a landlord radon certificate?
Alfa Air Agency provides professional radon testing reports. The landlord is responsible for the certification and disclosure required in the lease or lease addendum. Our reports do not constitute a government-issued rental license.
What if the radon level is 4.0 pCi/L or higher?
Elevated results may trigger confirmation testing and mitigation obligations. For existing tenants who notify the landlord under Montgomery County’s law, the ordinance sets follow-up testing and mitigation deadlines.
How long does professional radon testing take?
Our standard short-term testing uses continuous radon monitoring over approximately 48 hours, with reporting after completion and equipment retrieval.
Need a Radon Test Before Your Next Lease?
Alfa Air Agency serves landlords and rental property owners throughout Montgomery County, Maryland.
Official Radon Compliance Resources
Montgomery County — Radon Testing and Mitigation for Landlords and Tenants
City of Rockville — Rental Radon Ordinance
Information is provided for general educational purposes and is not legal advice. Alfa Air Agency provides radon testing and mitigation services; landlords remain responsible for determining and fulfilling their legal obligations.
