The US Department of Housing and Urban Development is finally giving manufactured housing permission to grow up — literally.

On June 12, 2026, HUD published a proposed rule in the Federal Register that would rewrite the definition of a “manufactured home” under the Manufactured Home Construction and Safety Standards (better known as the HUD Code). The headline change: upper floor sections would no longer be required to sit on a permanent chassis. In plain English, the steel undercarriage that has defined manufactured housing for decades would no longer have to ride along on floors two and up.

That may sound like a wonky regulatory tweak, but it is a genuinely big deal for anyone who has been watching the American housing supply crunch with growing dread.

Why the Chassis Rule Mattered

The permanent chassis requirement was built into the original HUD Code to make sense of how these homes are transported and installed. It also, inconveniently, made true multi-story manufactured housing almost impossible to design without hauling around a bunch of unnecessary steel on the second floor. Manufacturers have spent years asking for flexibility. HUD is finally answering.

“America needs more housing, and manufactured housing is part of the solution,” said Secretary Turner. “We are removing unnecessary barriers, encouraging innovation, and helping American manufacturers deliver more affordable housing options for American families.”

What Changes Under the Proposed Rule

The expanded definition would:

– Allow upper floor sections of manufactured homes to be transported and constructed without a permanent chassis.
– Support genuine multi-story manufactured housing designs, not just single-story boxes.
– Give manufacturers more flexibility to innovate on floor plans, materials, and construction methods.
– Lower production costs at a time when every dollar of housing affordability counts.
– Update corresponding language in the Model Manufactured Home Installation Standards and the Manufactured Home Installation Program regulations so the rest of the rulebook actually matches.

The Bigger Picture

More than 20 million Americans currently live in manufactured homes, and the industry employs tens of thousands of workers across the country. HUD is also working with state and local governments, housing finance agencies, and community developers on the zoning, infrastructure, and land-use policies needed to actually get these homes onto lots.

If the proposal is finalized, expect to see manufacturers roll out taller, more architecturally ambitious designs aimed at infill lots, workforce housing, and denser suburban neighborhoods where a two-story footprint makes far more sense than a sprawling single-wide.

Read the Proposal

The full proposed rule is available in the Federal Register: https://www.federalregister.gov/documents/2026/06/12/2026-11851/revising-the-definition-of-manufactured-home-to-lower-housing-costs

For media inquiries, HUD’s Office of Public Affairs can be reached at HUDPressOffice@hud.gov.

The public comment window is the moment to weigh in — whether you build these homes, finance them, permit them, or live in one. Regulatory reform this specific does not come around often, and the difference between “single-story only” and “go ahead and build up” could reshape what affordable housing looks like in America for the next generation.