A new federal law is testing an idea that housing policy has mostly avoided until now: tying federal grant money directly to how many homes a city or county actually builds. The 21st Century ROAD to Housing Act took effect July 10, 2026, and its central bet is that local governments will loosen zoning and permitting rules faster if there is real money attached to the outcome.
The law, based on H.R. 6644 of the 119th Congress, became law without President Trump’s signature. Under the Constitution, a bill automatically becomes law if the president neither signs nor vetoes it within 10 days of receiving it. Trump had called the measure “a big yawn” and wanted it paired with unrelated voter-ID legislation that has since stalled in the Senate, according to NPR. The bill passed with wide bipartisan margins: the Senate approved it 85-5 on June 22, 2026, and the House followed a day later, 358-32, according to a press release from Sen. Kevin Cramer, R-N.D., one of the bill’s sponsors, and a report from Time.
The problem it’s meant to address
The law responds to a housing shortage that has pushed prices out of reach for many buyers. The median price of an existing home sold in June 2026 was $440,600, and a household earning $75,000 a year could afford fewer than one-quarter of the homes listed for sale that month, NPR reported. Economists and lawmakers in both parties have pointed to local zoning and permitting rules β not just interest rates β as a major reason new construction hasn’t kept pace with demand.
Congress’s answer, described by the nonprofit newsroom Stateline, is to use federal grant formulas as leverage over local land-use decisions the federal government cannot directly control.
What the law actually does
The most novel piece is the “Build Now” provision. It ties a portion of Community Development Block Grant (CDBG) entitlement funding β money that flows to cities and urban counties β to how fast local housing supply is growing. Communities building at or above the median growth rate qualify for funding bonuses; those falling behind face funding reductions of roughly 10%, according to Stateline. The provision doesn’t begin until fiscal year 2029 and phases in through 2043, giving local governments years of lead time to adjust.
The law also changes what CDBG money can pay for. Previously, CDBG funds were largely restricted to rehabilitation, infrastructure and social services; the new law lets recipients spend up to 20% of their allocation on new affordable housing construction, per Stateline’s reporting. CDBG totaled about $3.3 billion in fiscal 2026 federal funding.
A separate Innovation Fund creates $200 million a year in competitive grants, running from fiscal 2027 through 2031, for communities that can show they increased housing supply through specific reforms: reducing parking minimums, cutting minimum lot sizes, allowing greater building height, legalizing accessory dwelling units, or streamlining permitting, according to the Bipartisan Policy Center, a Washington think tank that has tracked the bill’s provisions.
Beyond the funding mechanics, the law directs the Department of Housing and Urban Development to publish best-practice guidance on state and local zoning reform β covering parking minimums, floor-area ratios, accessory dwelling units and by-right approvals β and to issue model code language making it easier to permit single-stairway residential buildings up to six stories, per the Bipartisan Policy Center’s tracking of HUD’s implementation duties. The law separately eases federal manufactured-housing rules by eliminating a permanent chassis requirement, a change NPR reported could save $5,000 to $10,000 per home, and it streamlines environmental review requirements for smaller infill housing projects. It also restricts large institutional investors that own 350 or more single-family homes from buying additional ones, with exceptions for build-to-rent and senior housing developments.
What it means
Housing researchers who reviewed the law caution against expecting a quick jump in construction. David Garcia of the University of California, Berkeley’s Terner Center for Housing Innovation told Stateline the Build Now approach “goes even a step further” than past federal housing programs by “tying money to outcomes” rather than simply funding local programs and hoping for results. Ben Harrold of the National Apartment Association, an industry trade group, described the law’s approach to Stateline as mostly incentive-based: “The federal government is going to give you a whole lot of carrots … just a couple sticks.”
Housing researcher Yonah Freemark characterized the law’s likely impact as incremental, telling Time that meaningful affordability gains would take a “medium to long term” horizon and that effects are unlikely to show up within two years. RealtyWire is not aware of any independent modeling that quantifies how many additional housing units the law will produce, and neither HUD nor the bill’s sponsors have published such a projection; readers should treat any specific production estimates for this law with skepticism until agencies or independent researchers publish one.
What to watch
Implementation is the immediate hurdle. The law assigns HUD responsibility for writing or updating guidance on more than 35 new or revised programs, even as the agency’s staffing was cut 24% in fiscal 2026, according to Stateline’s reporting. How quickly β and how thoroughly β HUD issues the required zoning guidance, model building codes and grant rules will shape how much of the law takes effect on schedule.
The nearest-term deadlines involve the Innovation Fund’s first competitive grant round, expected to open in fiscal 2027, and HUD’s zoning and permitting guidance, which the law directs the agency to produce but does not set a hard public deadline for. The Build Now funding penalties and bonuses don’t begin until fiscal 2029, giving cities several years to adjust local zoning and permitting practices before federal dollars are directly at stake. That timeline matters against the backdrop of recent inventory and construction trends RealtyWire has been tracking. RealtyWire will track HUD’s rulemaking and the first rounds of Innovation Fund awards as they are announced.
