For fifty years, the fastest and cheapest way to build a house in America was effectively zoned out of most neighborhoods. That is changing, and the reason is simple: nothing else has brought prices down.

In Santa Rosa, California, a row of new one-story houses on Acacia Lane looks much like the taller houses across the street. They were built in a factory. Long stigmatized and barred outright by many towns and cities, factory-built housing is being reconsidered in places where home prices have climbed out of reach, the Washington Post reported Wednesday.

The economics are not subtle. A new manufactured home recently averaged about $135,000, and the Niskanen Center estimates these homes cost 27% to 65% less than comparable houses built on site. A typical site-built house runs north of $400,000. A buyer priced out of one market can be a homeowner in the other.

What kept these homes on the margins was a single federal rule written in 1974. Every manufactured home had to sit on a permanent steel chassis, the frame with axles used to haul it to the lot. The frame stayed attached forever, whether or not the house ever moved again.

It almost never did. Fewer than 5% of manufactured homes are ever moved from where they were first placed, according to research cited in a widely referenced federal report. Fewer than one in twenty. For the other nineteen, the steel served as expensive dead weight beneath the floor.

The chassis also did something worse than add cost. Because the home was built on a frame with wheels, most states classified it as personal property — like a vehicle — rather than as real estate. That pushed buyers into chattel loans carrying higher interest rates, shorter terms and fewer protections than an ordinary mortgage. The cheapest house on the market came with the most expensive financing.

Congress removed the requirement. The 21st Century ROAD to Housing Act became law on July 11 after passing the Senate 85 to 5 and the House 358 to 32. Dropping the frame cuts roughly $10,000 from the price of a single-section home, about 9% of its cost.

The bigger change is what it unlocks. Under the law, states have one year — two where legislatures meet every other year — to certify that homes built without a chassis are treated the same as traditional manufactured homes for financing, title, insurance and taxes. Once a home can be titled as real property, it qualifies for conventional, FHA and VA mortgages — the same loans everyone else gets, at the same rates.

Removing the frame also lets builders stack units into two-story homes and small apartment buildings, which matters most in expensive states where the land, not the house, is the cost.

None of this is finished. Lenders will not change their guidelines until federal rulemaking is complete, state legislatures have to act, and local zoning boards still control what gets built where. The Santa Rosa development is what the argument looks like when it works — houses that a passerby cannot pick out from their neighbors, at a price a first-time buyer can actually carry.

The remaining barrier was never the building. It was the rules around it, and the town councils willing to change them.

JBizNews Desk | New York

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