Sponsors (17)
The bill expands mortgage access and incentives to add ADUs—potentially increasing housing supply and homeowner income—while raising taxpayer and market risks, increasing homeowner leverage, and creating uneven access and implementation challenges.
Homeowners gain greater access to mortgage credit because HUD-insured ADU second liens plus GSE purchase/securitization expand secondary-market liquidity and can lower mortgage costs.
Homeowners can reduce upfront costs to build accessory dwelling units (ADUs) by using HUD-insured second liens, enabling them to add rental units that increase rental supply locally and generate rental income.
Homeowners and local governments benefit from a standardized ADU definition (including modular and manufactured units), which clarifies eligibility and can speed approvals and diverse ADU construction.
Taxpayers face increased financial exposure since HUD insurance for ADU second liens combined with possible GSE purchase/securitization could require public backstops if loans default.
Homeowners (particularly middle-class families) could see higher mortgage leverage and greater foreclosure risk because borrowers may finance up to 100% of projected post-construction value.
Homeowners and financial institutions could face concentrated higher-risk lending if expanded GSE activity loosens underwriting, raising market-stability and broader systemic risk.
Based on analysis of 2 sections of legislative text.
Creates a HUD-insured second-lien program for ADU financing and allows GSE purchase/securitization of those loans unless FHFA prohibits it due to risk.
Creates a new HUD-backed insurance program to cover certain second mortgages used to build accessory dwelling units (ADUs) on single-family properties, with limits on insured amounts and a possible annual premium. It also allows Fannie Mae and Freddie Mac to buy and securitize those HUD-insured ADU loans unless the FHFA finds that doing so would pose excessive risk and issues a written prohibition to Congress. The HUD program must be set up within two years, HUD must report to Congress annually, and the FHFA must include information about purchases and securitizations of these loans in its annual report. The law defines what qualifies as an ADU and sets rules for loan size, borrower certification, and premium limits.
Introduced July 17, 2025 by Sam T. Liccardo · Last progress July 17, 2025