The Housing Bill's Blind Spot Isn't Zoning. It's Federal Lending.

Congress just passed the 21st Century ROAD to Housing Act. Fifty-six provisions. Bipartisan supermajorities. The largest federal housing package in decades.

Local zoning remains a real constraint on housing production. This bill addresses part of that. The deeper constraint it left untouched is the one the federal government itself built: a lending infrastructure that makes one housing product easy to finance and penalizes everything else.

The bill's strongest provisions remove things. NEPA streamlining shortens approvals for infill and conversions. The manufactured housing chassis mandate disappears. Duplicate federal inspections are consolidated. Each attacks delay, design restrictions, or administrative friction directly. These provisions work because they subtract.

Most of the remaining provisions add. New grant programs, new pilots, new studies, new reporting requirements. A $200 million annual Innovation Fund. Competitive planning grants. Pre-approved design grants. Then you reach Section 1202, which states that no additional funds are authorized to implement any of it. The Senate Banking Committee's own fact sheet confirms the bill "spends no government funds." Every new program competes for existing appropriations that have been flat for years.

The investor restriction has dominated headlines. Structurally it is a sideshow. Large institutional investors, defined as firms owning more than 1,000 homes across at least three markets, hold roughly three percent of single-family rentals and less than one-half percent of the total single-family housing stock, per the Urban Institute. The bill restricts entities above 350 homes from acquiring more, with eleven exception categories and a threshold that can be circumvented by splitting holdings across entities.

The bill succeeds when it removes constraints. It weakens when it layers programs onto existing institutions. Its largest omission is that it never questions the federal institutions that shape housing finance.

What the bill misses entirely

The federal government did not create America's housing shortage through zoning. Local governments did that. What the federal government created is a lending apparatus built around a single product: the detached home on a fee-simple lot with a conforming mortgage. That product gets a 30-year fixed rate, secondary market liquidity, and an insurance infrastructure designed to move it from originator to investor with minimal friction. The mortgage interest deduction reinforces the tilt by subsidizing larger owner-occupied homes more than it expands ownership access. Everything that is not a detached single-family home faces friction. And the bill does not address any of it.

The four-unit cliff. Federal housing finance draws a hard institutional boundary at four units. Fannie Mae and Freddie Mac's single-family mortgage channel serves one-to-four-unit properties. At five units, a property generally moves into multifamily or commercial underwriting. That means larger equity requirements, terms based on the property's debt service coverage rather than the buyer's paycheck, and financing that commonly requires refinancing rather than offering a fully amortizing thirty-year loan. A fourplex and a fiveplex on the same street, with similar construction and similar rents, enter different financing systems because of a federal unit-count boundary. The five-plus-unit market is not unfinanceable. It is financeable on terms that exclude many ordinary owner-occupants and favor buyers who can meet commercial underwriting standards.

The building code creates a parallel cliff. Crossing from two to three dwelling units triggers the jump from the International Residential Code to the International Building Code, with a roughly ten percent construction cost premium documented by the Terner Center, more demanding fire and life-safety requirements, and substantially more complex design and review. CNU has identified this as the barrier that makes state zoning reforms fail to produce construction: a city legalizes triplexes, but the building code still says no. The financing cliff and the code cliff reinforce each other.

The condo financing wall. Condo finance remains constrained by project-level GSE approval standards that tightened sharply after Champlain Towers. Fannie Mae announced a new reserve regime in March 2026, retiring Limited Review for most established projects effective August 2026 and raising the replacement-reserve requirement from ten to fifteen percent for Full Review loans beginning January 2027.

Fannie also expanded its waiver of project review to certain projects of ten units or fewer. That is a real improvement. It does not solve the broader problem: many attached, mixed-use, or larger small-scale ownership projects still depend on building-level financial, insurance, reserve, and condition reviews that a buyer cannot control. As of early 2025, Fannie Mae's ineligible list included 5,175 condo and HOA projects, up from a few hundred before Champlain, with over 1,400 in Florida alone. A Community Associations Institute survey of more than 700 respondents found 42 percent did not even know whether their project was eligible for Fannie Mae financing. Among those deemed ineligible, 64 percent said it hurt sales or property values.

FHA presents a similar barrier. Until 2019, FHA insurance was unavailable in condos with more than 25 percent commercial floor space, disqualifying most mixed-use projects. The reform raised the cap to 35 percent, but only about 6.5 percent of roughly 150,000 condo projects carried FHA approval at the time.

The small-dollar mortgage desert. From 2004 to 2021, small mortgage lending fell nearly 70 percent, per the Pew Charitable Trusts. Only 26 percent of homes selling below $150,000 were financed with a mortgage, versus 71 percent of higher-priced homes. The Mortgage Bankers Association has documented total loan production expenses above $8,000 per loan, with roughly three-quarters unrelated to loan size. The bill creates a four-year FHA pilot and directs the CFPB to study originator compensation. That is a pilot and a study, not a structural fix.

What federal policy could actually do

The bill includes a handful of financing adjustments. The FHA small-dollar pilot, manufactured housing loan limit increases, and multifamily loan limit updates in Sections 105, 211, and 303 expand the capacity of existing lending buckets. What they do not do is shift the structural boundary between residential and commercial finance or address the GSE rules that determine which housing typologies private capital can flow toward.

Underwriting rules do not follow zoning reform. They gatekeep it.

One reform would require no new grant program or annual appropriation: create a consumer-style GSE mortgage channel for owner-occupied properties with six to eight units. An ordinary buyer could use a 30-year fixed, low-down-payment loan to purchase a small apartment building, live in one unit, and rent the rest. That is how missing-middle density gets financed at scale without institutional capital. Creating that channel would likely require congressional changes to the GSE framework, followed by new FHFA and enterprise underwriting standards. That is a heavy lift. It would also require new underwriting, appraisal, and servicing standards for larger owner-occupied properties. The statutory threshold is not the whole problem. It is the gate that prevents the system from even trying to solve it. But it is the right lever, and it is entirely within federal jurisdiction.

You can allow a fourplex by right in every city in America. If the buyer of the fiveplex next door still faces commercial down payments and a balloon term because the building crossed a federal unit-count line, the zoning reform opened a legal door while the lending rules kept the financial one shut. The family that could have purchased a small building, lived in one unit, and rented the rest to build equity is pushed toward terms most households cannot meet. The investor who can clear commercial underwriting is not. The federal financing system does not prevent missing-middle housing from being built. It shapes who gets to own it.

The strongest tool the federal government has for housing policy is not a grant program. It is the lending infrastructure it already operates. This bill left the machine untouched and wondered why missing-middle housing stays missing.