Housing Supply Expansion Act of 2025
Sponsored By: Senator Tillis, Thomas [R-NC]
Introduced
Summary
Expands the federal definition of manufactured homes to include units built without a permanent chassis. The bill would also require states to certify that they treat chassis and non-chassis manufactured homes the same and sets up federal oversight and penalties for noncompliant states.
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- States: Must certify within 1 year that their laws and regulations treat manufactured homes with and without a permanent chassis equally. States with biennial legislatures get 2 years and all states must submit annual recertifications or risk limits on installation, sale, and manufacture of covered homes.
- Homebuyers and sellers: Would change how these homes are handled for financing, title, insurance, taxes, sale, transportation, and installation by forcing parity across those areas. If a state misses certification, builders and sellers could face bans on installing or selling newly built covered homes in that jurisdiction.
- Federal agencies and markets: HUD must publish a list of compliant states and coordinate with other federal agencies to ensure consistent treatment across programs and create model guidance to help states meet certification requirements.
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Bill Overview
Analyzed Economic Effects
2 provisions identified: 1 benefits, 0 costs, 1 mixed.
Federal definition now includes chassis-less homes
If enacted, the bill would change the federal definition of "manufactured home" to include homes built with or without a permanent chassis. This change would take effect on enactment. If passed, that could change which homes qualify for federal loans, insurance, titles, and federal rules. Owners, buyers, lenders, insurers, and manufacturers could be affected.
States must certify parity or face bans
If enacted, each State would have to certify to HUD within 1 year that chassis-less manufactured homes get the same treatment as other manufactured homes. States with legislatures that meet every two years would have 2 years to certify. States must recertify each year on a date HUD sets. HUD would publish a list of States that are up-to-date and provide model guidance and coordination with other federal agencies. If a State misses the deadline, new chassis-less homes built after enactment would be banned from manufacture, installation, or sale in that State until HUD approves a late certification. If the State administers installation, the State must bar those activities; if HUD administers installation, both the State and HUD must bar them.
Sponsors & CoSponsors
Sponsor
Tillis, Thomas [R-NC]
NC • R
Cosponsors
Sen. Gallego, Ruben [D-AZ]
AZ • D
Sponsored 7/23/2025
Sen. Scott, Tim [R-SC]
SC • R
Sponsored 7/23/2025
Sen. Schatz, Brian [D-HI]
HI • D
Sponsored 7/23/2025
Katie Britt
AL • R
Sponsored 7/23/2025
Sen. Padilla, Alex [D-CA]
CA • D
Sponsored 7/23/2025
Sen. Crapo, Mike [R-ID]
ID • R
Sponsored 7/23/2025
Sen. Warner, Mark R. [D-VA]
VA • D
Sponsored 7/28/2025
Sen. Kelly, Mark [D-AZ]
AZ • D
Sponsored 7/28/2025
Sen. Hassan, Margaret Wood [D-NH]
NH • D
Sponsored 9/30/2025
Raphael Warnock
GA • D
Sponsored 12/11/2025
Sen. Husted, Jon [R-OH]
OH • R
Sponsored 2/26/2026
Roll Call Votes
No roll call votes available for this bill.
View on Congress.gov