Levers
Policy levers
Housing policy is a stack of tools, not a single bill. Some tools try to add units. Some change who can borrow, and on what terms. Some move after-tax cost. Some pay part of the rent. This page names the levers. It does not score a Congress or a city council, and it does not invent a program’s dollar size.
Supply and land use
Zoning, lot-size rules, parking minimums, environmental review, and permitting timelines decide what can be built on a parcel. Infrastructure — water, sewer, roads, schools — decides whether an entitled project can actually be occupied. Census New Residential Construction records the flow of permits, starts, and completions. It does not, by itself, say why a metro is slow.
Housing finance
A large share of U.S. purchase mortgages still runs through Fannie Mae and Freddie Mac under FHFA conservatorship, or through FHA, VA, and USDA programs. Those are different credit boxes. Ability-to-repay and QM rules sit on top. Rate levels are market tape — see usmarketupdates.com — not a policy lever this page will quote as a made-up average.
Tax treatment
Mortgage-interest and property-tax deductions, capital-gains exclusion on a primary residence, and depreciation rules for rental property change after-tax cost. They are not the same instrument as a voucher. Opportunity-zone and LIHTC design lives in Treasury and IRS guidance; this desk will not invent credit volumes.
Rental tools
Housing Choice Vouchers, public housing, project-based rental assistance, and the Low-Income Housing Tax Credit are the usual federal rental stack. HUD publishes program rules and Fair Market Rents. State housing finance agencies add their own layers. Initiative-level write-ups belong on affordablehousinginitiative.org.
How this desk uses the map
If the problem is cash to close or credit, look at finance and tax. If the problem is a missing unit, look at land use and infrastructure. If the problem is rent relative to income, look at the rental stack and the income series named on the affordability page. Mixing those diagnoses is how a policy conversation talks past itself.