Zoning is the invisible architecture of American cities. It dictates not just what can be built, but who can live there. The most common form, Euclidean zoning, strictly separates land uses: houses here, shops there, offices over there.
While this separation was originally sold as a way to protect residents from noxious factories, it has evolved into a tool for economic and racial exclusion. By mandating that vast swaths of a city can only contain single-family homes on large lots, zoning artificially restricts supply and drives up the cost of entry.
The approval process itself is often more restrictive than the zoning code. Even if a project is “by right” (meaning it meets all the written rules), it can still be subjected to discretionary review, environmental impact studies, and neighborhood notification periods that add years and hundreds of thousands of dollars to the cost.
The “By Right” vs. “By Permit” Distinction
“By right” means if you meet the code, the city must approve you. “By permit” means the city council has the discretion to deny you, even if you meet the code, usually after a contentious public hearing. Most affordable housing gets stuck in the “by permit” trap.
This discretionary power gives a veto to anyone with the time and money to hire a lawyer and file an appeal. It creates a system where housing is only built if the profit margin is high enough to absorb the risk and cost of the approval gauntlet.
The structural fix is to move as much housing as possible to “by right” approval. If a project meets the objective, pre-set criteria for height, density, and safety, it should be approved administratively, without a public hearing. Public input should shape the rules (the zoning code), not veto individual projects that follow the rules.
Reforming the approval process is less glamorous than arguing about building heights, but it is where the actual bottleneck lies. The code on the page matters less than the process in the planning department.
When reviewing local development codes, look for the word “discretionary.” Every time a project requires a special use permit, a variance, or a conditional use approval, it is a potential veto point. The goal of zoning reform is to replace discretion with clarity, making the right to build a predictable, administrative function rather than a political battle.