Sponsors (48)
The bill makes it materially easier and cheaper for homeowners to finance ADUs and could increase rental supply, but it raises significant taxpayer and borrower risk and leaves some affordability and implementation gaps that may limit near-term impact.
Homeowners can access FHA-insured second-lien loans for building ADUs that can be sized using projected ADU rent and whose insurance premiums are capped at no more than 1% per year, making ADU financing more affordable and predictable.
Homeowners can build lower-cost ADUs because the bill explicitly covers modular, manufactured, and conversion projects, reducing construction barriers and compliance hurdles.
Renters — especially lower-income renters — may gain more affordable rental options over time because the bill incentivizes ADU construction and therefore could increase local rental housing supply.
Taxpayers face greater contingent fiscal risk because FHA-insured second liens plus expanded GSE purchase/securitization increase the government exposure to combined loan losses if defaults rise or GSEs require support.
Homeowners — particularly lower-income borrowers — who take insured second liens to add ADUs may increase household debt and face higher foreclosure risk if projected ADU rental income doesn’t materialize.
Homeowners and borrowers may face higher default risk if allowing broad GSE participation shifts underwriting incentives and encourages riskier lending into the section 259 market.
Based on analysis of 3 sections of legislative text.
Creates an FHA-insured second-lien loan program for financing ADUs and allows GSE purchase/securitization of those loans subject to FHFA oversight.
Creates a new FHA insurance program to back second-lien loans used to build accessory dwelling units (ADUs) on single-family properties, including modular or converted units, with size and premium limits and annual reporting requirements. Directs the FHFA to allow Fannie Mae and Freddie Mac to purchase and securitize these insured ADU loans, unless the FHFA Director blocks such activity because it poses excessive market risk, and requires FHFA reporting on those purchases.
Introduced July 21, 2025 by Sam T. Liccardo · Last progress July 21, 2025