Housing Affordability

Freddie Mac's weekly survey put the 30-year fixed rate at 7.24% on October 29, 2026, down from 7.32% the week before but well above 6.17% a year earlier. It was 7.4% on October 8. Higher rates deepen the lock-in described in chapter 04.

The Census Bureau and HUD reported privately-owned housing starts at a 1.221M annual rate in September 2026, about 5.2% below August and 7.4% below September 2025. Single-family starts were 859K and permits were 1.40M. About 279K permitted units had not yet started, up from about 254K a year earlier (Census/HUD, October 20, 2026).

• Median existing-home price: $417,500 in September 2026, the 39th consecutive monthly increase (Rate.com summary of NAR data, Oct 13, 2026).
• Existing-home sales rose 1.5% from August (same source).
• Inventory: 1.6M homes for sale, up 1.9% from August and 4.6% from September 2025.

A 2026 supply-gap report cited by Barchart puts the cumulative deficit at 4.03M homes at the end of 2025. The producer of that report could not be confirmed, and a Congressional Research Service brief (September 2026) notes that shortage estimates rely on differing methodologies.

A January 20, 2026 executive order directed federal agencies to avoid financing or facilitating large-investor purchases of single-family homes, with an exemption for build-to-rent. A March 2026 law-firm analysis (Mondaq) reported that the Senate passed the 21st Century ROAD to Housing Act, which includes a limit on large institutional purchases. Enactment could not be confirmed. With institutions at ~0.5% of homes, the measure is small relative to the supply gap.

Not refreshed: price-to-income ratio (2025 value), real income index, owner shares by mortgage rate, buyer age, months' supply, permits by metro, Texas and California comparisons, insurer-loss states, and the status of the ROAD to Housing Act in the House.

In 1970 a typical home cost 2.7x a typical income. By 2024 it cost 5.1x, and the gap didn't open because Wall Street bought the houses. It opened because we stopped building them. Housing affordability is, at its core, an arithmetic problem: too few homes, priced against incomes that never kept up.

For two centuries home prices and wages moved together. Since 1970 they divorced: prices tripled in real terms while incomes barely held their ground. The median home went from 2.7x to 5.1x median income. The gap widened gradually, then broke open after 2000 and again after 2020.

• Builders went bust: thousands of firms failed in the 2008 crash and never returned.
• Labor walked away: 2M+ construction workers left; many never came back.
• Credit froze: construction lending dried up and stayed cautious for years.
• Land got scarce: buildable lots near jobs are zoned out or priced up.
• Zoning said no: most residential land bans anything but single-family homes.
• Builders went upmarket: fixed costs favor luxury; starter homes stopped penciling.

• Luxury / custom: new construction's sweet spot, highest margins.
• Move-up buyers: bigger homes on bigger lots; where builders compete.
• Starter homes: <1,400 sq ft: 40% of builds in 1982, <10% today.
• Priced out: renters and first-timers, the fastest-growing tier.

In housing, the raw material that matters isn't lumber or steel, it's permission. And permission is the one input whose price only rises. A buildable lot in San Jose costs many times an identical lot in Fresno. The difference is entirely zoning, permits, and proximity to jobs.

1. 01 Land & due diligence: 6-12 months to acquire and assess a site.
2. 02 Entitlements: 12-36 months of rezoning, hearings, approvals.
3. 03 Design & permitting: 6-18 months to engineer and clear permits.
4. 04 Construction: 12-24 months to build and deliver.

• Land. The one input that appreciates: 30-50% of home value in hot metros, up from <20% in the 1950s.
• Labor. A shrunken workforce; 52% of builders reported shortages in early 2024.
• Permitting. Adds years and unpredictable cost; time, not fees, is the expense.
• Productivity. Construction grew 0.4%/yr since 1970 while the economy grew 2%.
• Product mix. Fixed costs push builders toward bigger, pricier homes.

A scatter of price-to-income ratio (vertical) against ease of building, measured as permits per capita (horizontal). San Francisco, Los Angeles, New York and Boston sit top-left (locked and costly). Austin, Dallas, Raleigh and Houston sit lower-right (build and affordable). The other two quadrants are labeled 'Building, still pricey' (top-right) and 'Cheap, not building' (bottom-left).

You cannot buy a 3% mortgage anymore, but 70% of owners already have one, and they will not trade it for 7%. So nobody moves. The most borrower-friendly loan in the world becomes a gate that locks the market shut when rates rise.

1. Bond investors: ultimately hold the rate risk, under a federal backstop.
2. Freddie Mac (1970): backstops the secondary market and smaller lenders.
3. Ginnie Mae (1968): guarantees securities on government-backed loans.
4. Fannie Mae (1938): buys and bundles loans, freeing lenders to lend again.
5. FHA (1934): insures mortgages against default, lets banks lend long.

Affordability has a political problem: renters need prices to fall, and homeowners (two-thirds of households and most of the voters) need them to rise. Affordable for buyers means less valuable for owners. Every fix has a loser, and the loser usually votes.

The price-to-income ratio nearly doubled between the generations.

1. Home prices rise
2. Owner equity swells
3. Owners vote & lobby
4. New supply blocked
5. Scarcity persists (and the cycle returns to home prices rising; the center of the loop reads 'Prices protected')

1. 1934FHA: insured mortgages; down payments fell, terms lengthened
2. 1944GI Bill: 2M+ veteran loans; ownership 44% to 62% by 1960
3. 1970Securitization: first MBS; housing joins global capital markets
4. 1997Tax-free gains: $500K capital-gains exclusion on a home sale
5. 2008The crash: 8.6M foreclosures, then bailouts protect prices
6. 2020sThe freeze: near-zero rates, then lock-in; the ladder pulls up

The most-blamed buyers in America, private equity and Airbnb, together own a rounding error of the housing stock. The evidence is clear and unpopular: banning the villains changed who operates, not how much housing exists.

After decades of experiments, one finding survives contact with the data: to make housing cheaper, build more of it. Demand-side fixes are popular and weak. Supply-side fixes are hard and effective. The politics and the evidence point opposite ways.

1. Rent control: helps insiders, cuts supply.
2. Buyer bans: institutions are 0.5%.
3. Airbnb bans: listings fell, rents didn't.
4. Portability: unlocks frozen inventory.
5. Upzoning / YIMBY: more homes, softer prices.
6. Just build: Texas and Tokyo prove it.

The scale runs from demand-side (weak evidence) to supply-side (strong evidence).

• Tokyo: national zoning, weak local veto; prices flat for 20 years.
• Vienna: ~60% in social/subsidized housing, funded by a wage levy.
• Form-based codes: approve by-right if it fits the code; no per-project fight.
• ADUs: backyard cottages and garage conversions add gentle density.
• Assumable loans: ~25% of homes (FHA/VA) let a buyer take the seller's rate.
• Manufactured homes: the cheapest unsubsidized housing, where zoning allows it.

Housing broke the American Dream not with a villain but with a ratchet, a century of choices that made the home the middle class's greatest asset, and, for everyone still outside, its highest wall.

1. Housing decoupled from wages: a century of policy made it an asset, not shelter.
2. The shortage is structural: and worst at the bottom, where starter homes vanished.
3. Lock-in is a feature, not a glitch: the 30-year fixed's gift became its trap.
4. The blame game is a distraction: institutions and Airbnb are secondary at most.
5. Affordability is a choice: every fix picks a side, and incumbents usually win.

• U.S. Census Bureau & HUD: home prices, incomes, housing starts and completions (2024-25).
• Freddie Mac: housing-shortage estimates and boomer-household projections (2024).
• National Association of Realtors: buyer demographics and first-time-buyer share (2025).
• FHFA & ResiClub: outstanding-mortgage rate distribution and lock-in analysis (2025).
• Harvard Joint Center for Housing Studies: State of the Nation's Housing.
• S&P CoreLogic Case-Shiller: national and metro home-price indices.
• Brookings, NBER & BatchData: institutional ownership and rental-market research.
• Stanford GSB; McKinsey; Construction Physics: rent control, productivity, land. Figures marked (est.) are compilations.