Guide Update 25-07
:  Radon Requirements
Effective:
Radon Requirements (Redline).pdf
Form 4251 (Redline).pdf

HIGHLIGHTS

Effective for all Mortgage Loans as of April 16, 2025, updated radon testing requirements in:

 

  • the Environmental Due Diligence Requirements (Form 4251); and
  • Part III, Chapter 18: Choice Refinance Loans.

 

Primary Changes

  • Revised Form 4251 radon testing information to:
    • update requirements in:
      • Section 1. Phase I Environmental Site Assessments; and
      • Section 2. Phase II Environmental Site Assessments; and
    • remove:
      • Section 3. Radon Assessment; 
      • Schedule 1: Fannie Mae Multifamily Radon Testing Requirements; and
      • Appendix A to Schedule 1: Fannie Mae Multifamily Radon Testing; and
  • Updated Part III, Chapter 18: Choice Refinance Loans, Section 1804.02: Radon Testing.

 

Questions

Please contact the Fannie Mae Deal Team with any questions.