Updated Radon Standards for Fannie, Freddie Multifamily Properties
The Federal Housing Finance Agency today announced enhanced radon testing requirements for Fannie Mae and Freddie Mac multifamily properties with loan applications received after June 30, 2023.
The enhanced radon testing at Fannie and Freddie-backed multifamily properties, regardless of where the property is located (subject to some exceptions and deferrals), will include:
- Increasing the amount of required testing from 10% of ground floor units to 25% of ground floor units;
- Requiring an environmental professional to oversee radon testing;
- Requiring the environmental professional or property representative to notify tenants of radon testing; and
- Providing additional guidance for lenders and environmental consultants on Fannie and Freddie’s radon standards. As part of such guidance, Fannie Mae and Freddie Mac will reinforce the need for compliance with state and local radon laws.
In addition, Fannie Mae and Freddie Mac will collaborate with housing providers, radon industry stakeholders, and the Centers for Disease Control and Prevention (CDC) to encourage better radon data collection at multifamily properties.
Latest from NAHBNow
Education | Economics | Remodeling
Aug 21, 2026
Experts Forecast the Remodeling Industry's Future
NAHB’s Mid-Year Remodeling Forecast Update webinar reviewed how the remodeling industry will weather changing economic conditions, homeowner priorities and market demand.
Safety
Aug 20, 2026
OSHA Hazard Communication Compliance Deadline Set for Nov. 20
A deadline for compliance with 2024 revisions to OSHA’s Hazard Communication Standard (HCS) is approaching for home builders and other downstream chemical users. Employers must comply with revised classifications or hazard information for substances in their workplaces by Nov. 20, 2026.
Latest Economic News
Economics
Aug 21, 2026
Second Quarter Declines for Single-Family Built-to-Rent
Single-family built-for-rent (SFBFR, or built-to-rent (BTR)) construction fell back in the second quarter of 2026, as a higher cost of financing, increased multifamily supply and policy concerns over Congressional legislation related to institutional capital froze parts of the development market.
Economics
Aug 20, 2026
Short-Term Townhouse Construction Weakness
Second quarter 2026 data reveal softer conditions for townhouse construction as housing affordability challenges affect homebuyer demand, particularly in larger metropolitan markets.
Economics
Aug 19, 2026
Flat Conditions for Custom Home Building
With overall single-family construction down almost 7% for the first seven months of 2026, custom home building has been a relative bright spot for the residential construction industry.