HUD released its "Next Generation Manufactured Housing Action Plan" this week — a seven-step roadmap for rewriting the manufactured housing code to comply with the 21st Century ROAD to Housing Act. The chassis-free mandate is law, but manufacturers can't sell a single chassis-free home until HUD completes rulemaking across all seven steps. For developers, contractors, and capital partners evaluating factory-built housing strategies, the plan clarifies what's coming — and how much runway remains before the market actually opens.

Key Takeaways:

• The permanent chassis requirement was eliminated by the 21st Century ROAD to Housing Act, passed in July 2026, but HUD rulemaking must be completed before manufacturers can sell chassis-free homes.
• HUD's 7-step action plan includes formal rulemaking on energy efficiency standards (24 CFR Part 3280), chassis-free construction standards, and updated installation/foundation standards (24 CFR Part 3285).
• Step 5 proposes a performance-based federal code for buildings with 5+ units — a significant expansion beyond the duplex/triplex/quadplex standards HUD only updated in 2024.
• HUD has selected the National Institute of Building Sciences to support the multifamily factory-built construction initiative tied to the 5+ unit code development.
• Champion Homes debuted two chassis-free, two-story urban infill models at the September 2026 Innovative Housing Showcase; Cavco Industries debuted the Grande Arbor, its first chassis-free model.
• Cavco CEO William Boor confirmed on a July 31 earnings call that there is no set timeline for when chassis-free models will reach the market.
• Step 7 creates an on-ramp for existing modular and off-site manufacturers to enter the HUD regulatory system — a supply-side move that could expand the pool of HUD-certified producers.

The direction is clear, but the timeline isn't. Developers and capital partners evaluating chassis-free or multifamily factory-built strategies should be stress-testing underwriting assumptions against a rulemaking process that has no published completion date — and a post-rulemaking approval queue that adds further lead time. The 5+ unit performance code, if it materializes, is the piece with the most significant long-term implications for industrialized multifamily construction at scale.

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