The next time someone tells you that housing is too expensive, ask how many parking spaces are required by law in the building they are discussing. In almost every American city, the answer is at least one — and often two or more — per unit. Nobody negotiated for this. Nobody signed a lease or a purchase contract demanding it. The mandate was written by local zoning officials, and its cost is embedded in every rent check and every mortgage payment made in this country. It is, in effect, a tax on housing — collected not by the Treasury, but by the parking garage.
A Mandate Built in the 1950s
Minimum parking requirements were first adopted broadly in American zoning codes during the 1950s, as the post-World War II automobile economy reshaped urban planning orthodoxy. The reasoning, at the time, seemed benign: new development should provide enough parking to accommodate its residents and visitors. But what began as a planning heuristic hardened into a compulsory floor — adopted jurisdiction by jurisdiction, until today these mandates are embedded in virtually every local zoning code in the country.
The typical residential requirement ranges from one to two parking spaces per unit, regardless of whether the building sits adjacent to a transit corridor, in a dense walkable neighborhood, or in a market where a significant share of residents do not own automobiles. The mandate applies uniformly. The actual demand of future residents for parking is never consulted. The price system — which would naturally reveal how much parking any given location warrants — is entirely bypassed. Central planners at city hall, working without a single market signal, determined how much parking each apartment in America must provide. That determination has been baked into construction costs ever since.
The True Cost of a Government-Required Parking Space
Building a parking space costs money. That money comes from somewhere — and it consistently comes from the residents who occupy the building, regardless of whether those residents own cars.
Research published by the Victoria Transport Policy Institute on parking requirements and housing affordability documents the cost range in detail: structured above-grade parking typically costs $20,000 to $40,000 per space to construct; underground parking facilities frequently cost $40,000 to $80,000 per space or more, depending on soil conditions, depth, and urban land values. Surface parking — nominally the less expensive option — consumes land that in high-density markets would otherwise be used for housing.
None of these costs are absorbed by developers as a charitable contribution. They are passed to residents through higher rents and higher purchase prices. In a city that mandates underground parking and requires two spaces per unit, a developer building a 100-unit apartment building may face $8 million to $16 million in parking construction costs — before a single residential square foot is built. That cost is distributed across every unit in the building, adding $80,000 to $160,000 per apartment to the effective production cost, whether the occupant drives or not.
The affordability math here is straightforward and sobering. NAHB's priced-out research finds that a $1,000 increase in the price of a median-priced new home — currently $413,595 — prices an additional 156,405 American households out of the market entirely. Apply that multiplier to even a $30,000 parking cost premium: roughly 4.7 million households priced out of homeownership by a government mandate for concrete storage. That is not incidental policy friction. That is structural harm imposed by regulation.
The Market Test That Governments Refused to Run
Milton Friedman's central insight about market prices applies with full force here: prices are information. When residents genuinely value on-site parking, they signal that preference through their willingness to pay a premium for units that include it. Profit-seeking developers, reading that signal, respond by providing parking — because it is profitable to do so. When residents are indifferent to parking, or when a neighborhood's transit access makes car ownership less attractive, developers respond accordingly, devoting more of a building's footprint to rentable housing rather than concrete decks.
Government minimum parking requirements eliminate this feedback mechanism entirely. They mandate a supply of parking regardless of whether market demand for it exists at the required level. The result is a compulsory subsidy: residents who do not own cars are forced to pay for parking infrastructure for those who do. Renters in transit-rich neighborhoods pay for garages they never enter. First-time buyers in walkable urban cores are handed a bill for facilities they did not request and cannot use.
F.A. Hayek's knowledge problem is directly implicated. Zoning authorities lack the dispersed, local, and continuously shifting knowledge needed to determine the correct supply of parking for each building in each neighborhood at each point in time. Only market prices can aggregate that information dynamically and efficiently. Minimum parking requirements substitute an administrative presumption — formed once, baked into code, and revised rarely if ever — for the price discovery mechanism that would naturally produce efficient outcomes. The predictable result is systematic over-investment in parking and systematic under-investment in housing.
Supply Destroyed Before It Is Built
The cost of parking minimums extends beyond construction expenditure. In dense urban environments, parking requirements consume developable land — permanently.
Every surface parking lot that zoning requires is land that cannot be used for housing. Every podium garage — in which apartments are stacked above mandatory floors of car storage — compresses the effective residential density of a site. In markets where land values are high and housing demand is acute, this represents a direct conversion of housing capacity into car storage, imposed by regulatory fiat rather than market preference.
The Census Bureau's Building Permits Survey documents the persistent gap between residential construction and underlying population growth. Groundbreaking research by Edward Glaeser and Joseph Gyourko, published by the National Bureau of Economic Research, demonstrated that in constrained urban markets, housing prices substantially exceed the marginal cost of construction — a gap that exists precisely because land-use regulations prevent supply from responding to demand. Minimum parking requirements are among those land-use restrictions. They artificially raise the cost floor, reduce the feasible residential density of development sites, and systematically prevent the construction of units that the market would otherwise produce and price efficiently.
A Growing National Reckoning
The economic evidence has begun, slowly, to reshape public policy.
In September 2022, California enacted AB 2097, which prohibits public agencies from imposing any minimum automobile parking requirement on residential, commercial, or mixed-use development located within one-half mile of a major transit stop. In the nation's largest housing market, the presumption that government planners should mandate parking near transit has been formally eliminated by statute.
Minneapolis removed citywide parking minimums as part of its sweeping 2040 Comprehensive Plan, which also abolished single-family-only zoning. The Minneapolis Federal Reserve has examined rent trends in the city since the 2040 Plan's adoption, tracking the relationship between supply reform and housing cost outcomes. Buffalo, New York, became the first major American city to eliminate parking minimums citywide in 2017, recognizing that mandated parking was a structural obstacle to housing production and neighborhood reinvestment.
These reforms share a common analytical foundation: that governments do not possess superior knowledge about the optimal supply of parking in any given location, and that the correct instrument for determining that supply is not the zoning code but the market. As Thomas Sowell would put it, the question is not whether parking is desirable — it often is — but who should decide how much of it gets built, and with whose money.
Let the Market Price the Parking
The housing affordability problem in the United States is, at its structural core, a supply problem. Government regulations — zoning restrictions, building codes, impact fees, environmental review processes, permitting delays — systematically prevent the market from building the housing that demand calls for. The NMHC and NAHB have documented that government regulation now accounts for 40.6 percent of multifamily development costs. Minimum parking requirements are a distinct and removable component of that burden.
Removing them does not mean parking disappears. Developers in car-dependent suburban markets will continue building parking — because their residents demand it and will pay for it. Developers near transit corridors will build less parking — because their residents are less likely to own cars and will not pay a premium for spaces they do not use. This is precisely how a functional price system operates: it routes investment toward its highest-valued uses without requiring a bureaucratic determination of what those uses are.
The parking mandate is a tax on housing. It was never voted on by the people who pay it. It persists not because markets failed, but because government replaced markets with a planning assumption formed in the Eisenhower era. The states and cities that have begun dismantling it are discovering what free-market economists predicted decades ago: when regulators step back and let prices do their work, the market builds more of what people actually need.
