Housing Supply Expansion Act of 2025
- Sponsor
- Sen. Tillis, Thomas [R-NC]
- Committees
- Banking, Housing, and Urban Affairs Committee (primary)
- Last action
- Jul 23, 2025
Bottom line
The bill aims to expand affordable housing options by modernizing the federal definition of manufactured homes and requiring states to remove regulatory barriers for homes built without a permanent chassis.
What it actually does
This bill amends the federal definition of "manufactured home" to include homes built "with or without a permanent chassis," thereby recognizing homes designed for permanent foundations. It mandates that states certify to the Department of Housing and Urban Development (HUD) that their laws treat these newly defined manufactured homes in parity with traditional manufactured homes across various regulatory areas. States failing to provide this certification will face a prohibition on the manufacture, installation, or sale of such homes within their borders.
Proponents argue
Proponents argue that this legislation will unlock new housing options, particularly for affordable housing, by allowing innovative manufactured homes (like those built on permanent foundations) to be treated similarly to traditional manufactured homes. This standardization will reduce regulatory hurdles, lower costs, and increase the overall housing supply, addressing a critical national need.
Opponents contend
Opponents might raise concerns about potential impacts on state autonomy, arguing that the bill imposes significant new administrative and legislative burdens on states. They may also contend that the enforcement mechanism, which prohibits the sale of certain homes in non-compliant states, represents an overreach of federal power and could inadvertently limit housing choices for consumers.
The bill is concise and its core provisions are clearly stated, allowing an informed reader to quickly grasp its main objectives and mechanisms.
Section 2(a)
Updating the Definition of Manufactured Home
This provision amends Section 603(6) of the National Manufactured Housing Construction and Safety Standards Act of 1974 (42 U.S.C. 5402(6)) by striking "on a permanent chassis" and inserting "with or without a permanent chassis." This change means that factory-built homes meeting federal safety standards, regardless of whether they are built on a towable chassis or designed for a permanent foundation, will now be federally recognized as manufactured homes.
Supporters argue
Supporters argue this update modernizes the definition to reflect advancements in construction technology and removes an outdated barrier that prevented certain factory-built homes from being classified as manufactured homes, despite meeting federal safety standards. This will facilitate the production of more affordable, high-quality housing.
Critics contend
No specific opposition is typically raised against updating definitions to reflect technological advancements, provided safety and quality standards are maintained. Potential concerns might arise if the new definition is perceived to dilute existing consumer protections, but the bill aims for parity.
Tradeoffs
This provision balances the need for modernizing housing definitions to encourage innovation against ensuring consistent safety and quality standards for all manufactured homes, regardless of their foundation type.
Section 2(b), adding Section 604(i)
State Certification Requirements for Regulatory Parity
States are required to submit an initial certification to the Secretary of HUD within one year (or two years for states with biennial legislatures) confirming that their laws and regulations treat manufactured homes, including those without a permanent chassis, in parity with traditional manufactured homes. This parity must cover financing, title, insurance, manufacture, sale, taxes, transportation, and installation. States must also submit annual recertifications.
Section 2(b), adding Section 604(i)(5)
Prohibition for Non-Compliant States
If a state fails to submit the required initial or annual certification by the deadline, it will be prohibited from allowing the manufacture, installation, or sale of "covered manufactured homes" within its borders. A "covered manufactured home" is defined as one without a permanent chassis, considered a manufactured home under the federal definition, but not by the state, and constructed after the bill's enactment.
Section 2(c)
Coordination with Other Federal Agencies
The Secretary of Housing and Urban Development (HUD) is authorized to coordinate with the heads of other federal agencies to ensure they treat manufactured homes (as newly defined by this Act) in the same manner as traditional manufactured homes in their respective federal laws and regulations. This aims to ensure consistent federal treatment across all relevant programs.
Section 2(d)
Assistance to States through Model Guidance
This section amends 42 U.S.C. 5408 to require the Secretary of HUD to provide "model guidance to support the submission of the certification required under section 604(i)." This means HUD will develop and disseminate resources to help states understand and meet the new federal certification requirements for regulatory parity.
This subsection defines "covered manufactured home" as a home that is (i) not considered a manufactured home under state laws because it lacks a permanent chassis, (ii) is considered a manufactured home under the new federal definition, and (iii) is constructed after the date of enactment of the Housing Supply Expansion Act of 2025. This precise definition limits the scope of the prohibition on manufacture, installation, or sale in non-compliant states.
Section 2(b), adding Section 604(i)(5)(A)
Why it matters:This is standard legislative practice to define terms precisely where they are used to ensure legal clarity. However, the specific conditions within the definition are highly consequential for the bill's practical effect.
Case for: Supporters would argue this precise definition ensures the enforcement mechanism is narrowly tailored to the specific problem the bill seeks to address: the regulatory disparity for modern manufactured homes. It prevents retroactive application of the prohibition and focuses on future housing supply.
Case against: Critics might argue that the specificity could create administrative complexities in determining which homes fall under this definition, potentially leading to disputes or uneven enforcement across states or over time.
Estimated impact: This definition directly impacts the market for newly constructed manufactured homes designed for permanent foundations in non-compliant states, potentially preventing their sale and installation, but only for those built after the bill's enactment.