The ’21st Century Road to Housing Act’, is a bipartisan bill aimed at tackling America’s housing affordability crisis, which officially became law early Saturday, despite repeated attempts by President Donald Trump to stall it.Supporters have called it the most comprehensive housing reform in at least three decades. White House press secretary Karoline Leavitt herself once described it as “one of the most significant pieces of housing affordability legislation in American History.” But Trump, who had previously backed the bill, turned sharply critical in the weeks before it took effect, ultimately refusing to sign it and dismissing it as a “big yawn.“
How law passed without Trump’s signature
Trump’s souring on the bill had little to do with housing policy itself. In a social media post on Friday, he said he was withholding his signature in protest of the Senate’s failure to pass the SAVE America Act, a voter ID measure he has insisted should be Congress’s top priority.That wasn’t Trump’s first swipe at the legislation. A month earlier, he canceled a scheduled signing ceremony just two hours before it was set to begin. He has also argued that lowering interest rates matters far more than the housing bill, which he called “of minor importance” by comparison.None of that stopped the bill from becoming law because Trump didn’t sign it but he hadn’t vetoed it either. As a result, the legislation automatically took effect Saturday morning under the Constitution’s rules for presidential inaction.
What the Act will change
The law bundles together 47 separate proposals meant to boost housing supply, cut costs and widen access to affordable homes. Yonah Freemark, a housing research associate at the Urban Institute, told CNN that most of its effects won’t be felt immediately, since building takes time and the law hands already short-staffed federal agencies a substantial new workload.Boosting supplyThe act promotes manufactured housing and office-to-apartment conversions, and authorises a pilot program offering grants and forgivable loans to repair older homes that have fallen into disrepair. It also encourages, but does not require, states and localities to loosen zoning and land-use rules that have throttled homebuilding. A 2025 Goldman Sachs report estimated that relaxing such regulations nationwide could add 2.5 million housing units over the next decade.Reining in institutional investorsFor the first time, the law bars any investor that owns more than 350 single-family homes from purchasing additional ones. It does not, however, force existing mega-investors to sell off properties they already hold. Most investor-owned homes belong to small “mom-and-pop” landlords with fewer than 10 properties, and large investors such as Blackstone have already been net sellers in the single-family market in recent years.
What’s missing
Lock-in effectThe legislation also does little to address the mortgage rate “lock-in effect,” where millions of homeowners who secured ultra-low mortgage rates during the pandemic are reluctant to sell because buying another home would require taking on a much higher interest rate, further constraining housing supply.Mortgage rates are driven largely by the 10-year US Treasury yield and broader market expectations rather than federal housing policy. While Trump has repeatedly called for lower interest rates, borrowing costs have remained elevated amid persistent inflation concerns and geopolitical uncertainty. The legislation also leaves unresolved other structural challenges, including rising construction costs driven by labour shortages, tariffs and inflation, as well as the broader mismatch between housing demand and supply.Implementation riskFormer Housing and Urban Development Secretary Shaun Donovan, now CEO of Enterprise Community Partners, noted that the law’s success depends heavily on execution: “This is a bill that changes rules and regulations. It will unlock funding, but most of the provisions are only as good as the implementation.”
