The 21st Century ROAD to Housing Act (H.R. 6644), as passed by the Senate on March 12, 2026, represents a strategic shift in federal housing policy from passive support to active, performance-based intervention. While the Act explicitly aims to avoid direct federal preemption of general local zoning authority—including a specific “Rule of Construction” prohibiting the Secretary of Housing and Urban Development (HUD) from mandating local land use policies—it aggressively utilizes the “power of the purse” to alter local behavior.
The most material alteration to the federal-local relationship is the restructuring of the Community Development Block Grant (CDBG) program. By conditioning allocations on a newly established “Housing Growth Improvement Rate,” the Act introduces a fiscal mechanism that penalizes jurisdictions with below-median housing production and rewards “extremely high-growth” recipients (Text – H.R.6644 – 119th Congress (2025-2026): 21st …).
Furthermore, the Act materially alters the regulatory landscape for manufactured housing. By expanding federal definitions and harmonizing standards, the Act seeks to override local prohibitions on modular and manufactured homes that meet federal safety standards, thereby effectively preempting local zoning ordinances that discriminate against these typologies. These changes are projected to shorten entitlement timelines significantly for manufactured and modular projects, while the “Housing Growth Improvement Rate” creates a competitive fiscal environment compelling municipalities to streamline general permitting to preserve federal funding streams.
Legislative Context and Objectives
The United States continues to face a structural housing shortage, prompting legislative action that bridges the gap between federal oversight and local autonomy. H.R. 6644, the “21st Century ROAD to Housing Act,” passed the Senate with a significant bipartisan majority (89-10) on March 12, 2026, and was messaged to the House on March 16, 2026 (Text – H.R.6644 – 119th Congress (2025-2026): 21st …).
The legislation operates within a context where radical direct preemption proposals, such as the “National Housing Emergency Act of 2026” (S. 3600)—which sought to invoke the Defense Production Act to override local regulations—did not advance beyond committee (Summary of S 3600 (119th Congress)). Instead, H.R. 6644 adopts an incentive-based framework. Its primary objective is to increase housing supply by identifying and reducing regulatory barriers without formally stripping municipalities of their police powers regarding land use.
The Act focuses on “workforce housing” (80-120% AMI) and aims to modernize federal housing programs (HOME, CDBG, and RAD) to function as levers for supply growth (ROAD To Housing Act Summary). By rejecting the direct federal zoning overrides proposed in S. 3600, H.R. 6644 positions itself as a compromise that respects the legal principle of local zoning authority while making the maintenance of that authority fiscally contingent on producing results.
Analysis of Zoning Authority and Federal Preemption
H.R. 6644 contains specific provisions that navigate the tension between federal incentives and local control. While the Act includes a “Rule of Construction” expressly stating that nothing in the Act authorizes the HUD Secretary to “mandate, supersede, or preempt any local zoning or land use policy,” other sections materially alter the practical application of local authority (Text – H.R.6644 – 119th Congress (2025-2026): 21st …).
Manufactured Housing Preemption
The most direct alteration of local authority occurs in Title III. The Act amends the National Manufactured Housing Construction and Safety Standards Act of 1974 to broaden the definition of “manufactured home” and explicitly integrates “modular” housing into federal safety frameworks. Section 302 mandates a review of barriers to modular construction and financing. By harmonizing these definitions and strengthening the federal preemption under HUD code standards, the Act limits the ability of local jurisdictions to use zoning ordinances to ban manufactured or modular homes that meet federal energy and safety standards (Text – H.R.6644 – 119th Congress (2025-2026): 21st …; ROAD To Housing Act Summary). This effectively preempts “discriminatory” zoning against these specific housing typologies.
Guidelines vs. Mandates
Section 203 directs the Assistant Secretary for Policy Development and Research to publish “guidelines and best practices” for state and local zoning frameworks. These guidelines will recommend:
- Reduction or elimination of parking minimums.
- Increases in floor area ratios (FAR) and building heights.
- Elimination of restrictions against Accessory Dwelling Units (ADUs).
- Adoption of “by-right” uses for duplexes, triplexes, and quadplexes.
- Implementation of “nondiscretionary, ministerial review” processes.
While these are technically guidelines, the Act encourages their adoption through the “Housing Growth Improvement Rate” funding mechanism (discussed in Section 4).
Impact on Entitlement Timelines
The provisions are designed to materially shorten entitlement timelines in two ways:
Streamlined Review for “Covered Structures”: The “Accelerating Home Building Act” (Section 211) authorizes grants for localities that adopt “pre-reviewed designs” (pattern books) for structures like duplexes and townhouses. Usage of these designs allows for expedited, ministerial approval, bypassing lengthy discretionary review boards (Text – H.R.6644 – 119th Congress (2025-2026): 21st …).
NEPA Streamlining: Section 207 designates certain HUD assistance as “special projects,” allowing for expedited environmental reviews or exemptions for non-major federal actions. This removes a significant federal procedural bottleneck for affordable housing developments (ROAD To Housing Act Summary).
Conditional Funding: The Housing Growth Improvement Rate
The most significant compliance requirement imposed by H.R. 6644 is the modification of Section 106 of the Housing and Community Development Act of 1974 regarding Community Development Block Grant (CDBG) allocations.
The Mechanism: Housing Growth Improvement Rate
The Act introduces a performance metric known as the Housing Growth Improvement Rate, defined as the quotient of the difference between the current and prior annual growth rates divided by the sum of their absolute values. This formula effectively measures the acceleration of housing production within a jurisdiction (Text – H.R.6644 – 119th Congress (2025-2026): 21st …).
Financial Consequences
Bonus Allocations: Eligible recipients with a growth rate at or above the median for all recipients, or those designated as “extremely high-growth recipients” (annual growth ≥ 4%), are eligible for bonus CDBG funds. The bonus is calculated based on a pro-rata share of funds reallocated from underperforming jurisdictions.
Funding Decreases: The Secretary is mandated to decrease the allocation by 10% for eligible recipients whose housing growth improvement rate falls below the median for all recipients (excluding high-growth outliers).
Enforceability
Unlike previous federal attempts to condition funds on “Affirmatively Furthering Fair Housing” (AFFH)—which relied on subjective submission of equity plans—the Housing Growth Improvement Rate is a quantitative, formulaic statutory requirement. The Act explicitly empowers the Secretary to calculate housing units and growth rates. Because the penalty (a 10% reduction) and the reward (bonus pool) are hard-coded into the allocation formula, they are highly enforceable and non-negotiable. Local governments cannot evade these conditions through narrative explanations; they must demonstrate physical unit production.
This structure creates a “prisoner’s dilemma” for local governments: because the penalty threshold is based on the median performance of all recipients, jurisdictions are forced to compete against one another to increase housing production to avoid falling into the bottom 50% and losing critical infrastructure funding.
Restructuring Federal Incentives and Market Impact
H.R. 6644 restructures federal incentives to target specific market gaps, particularly for workforce housing and supply-side production.
Expanded Financing Tools and Definitions
Workforce Housing: The Act creates a new statutory focus on “Workforce Housing,” defined as housing for households earning between 80% and 120% of Area Median Income (AMI) (Text – H.R.6644 – 119th Congress (2025-2026): 21st …). This expands eligibility for certain federal incentives beyond traditional Low-Income Housing Tax Credit (LIHTC) targets, benefiting “missing middle” developers.
Rental Assistance Demonstration (RAD): Section 201 eliminates the cap on the RAD program and makes it permanent. This allows public housing authorities (PHAs) to leverage private capital to rehabilitate public housing stock indefinitely, significantly benefiting the preservation and rehabilitation market (ROAD To Housing Act Summary).
Banking Investments: The Act raises the cap on banks’ public welfare investments from 15% to 20%. This effectively unlocks additional equity capital for affordable housing projects, benefiting LIHTC developers and equity funds (ROAD To Housing Act Summary).
Incentives for Regulatory Reform
The Act authorizes $200 million annually (FY 2027-2031) for grants to eligible entities (states, local governments, tribes) that implement pro-housing policies. Priority is given to entities that demonstrate:
- Increases in by-right uses (duplex/triplex).
- Revision of minimum lot sizes and parking requirements.
- Streamlining of permitting processes.
Beneficiaries
Manufactured and Modular Housing Producers: Title III’s preemption of local barriers and the mandate for FHA to revise financing barriers for modular construction positions this sector for significant growth.
Infill Developers: The Act defines “infill housing project” (sites under 5 acres, previously disturbed land) and exempts certain small projects (under 50 units) from onerous federal requirements, such as Section 3 of the Housing and Urban Development Act of 1968 (Text – H.R.6644 – 119th Congress (2025-2026): 21st …).
High-Growth Jurisdictions: Cities already experiencing growth (e.g., Sun Belt metros) will receive CDBG bonuses, reinforcing their development pipelines.
Conclusion: Strategic Implications for Development
The enactment of H.R. 6644 establishes a distinct “pay-for-performance” era in federal housing policy for the 2026-2031 period. While the Act stops short of the direct zoning overrides seen in more radical proposals, its financial restructuring of CDBG funds creates a de facto federal zoning mandate. Municipalities that fail to accelerate housing production will face tangible fiscal penalties, forcing a re-evaluation of restrictive zoning codes even in jurisdictions historically resistant to growth.
For developers, the most immediate strategic opportunities lie in the manufactured/modular sector, where federal preemption of local bans is strongest, and in infill workforce housing, where new incentives and regulatory exemptions (such as NEPA streamlining and Section 3 waivers) reduce project costs and timelines. The enforceability of the CDBG funding conditions ensures that the pressure on local governments to approve entitlements will remain sustained and quantifiable through at least 2031.