Stephen Smith at Market Urbanism looks at the truth behind the cliché, and finds that while Houston does not have Euclidean zoning, it does have more unconventional means of controlling land use beyond the invisible hand of the free market.
Smith quotes a paper by Planetizen blogger Michael Lewyn that says that minimum lot sizes are common in the supposedly unplanned Houston.
"Not to be outdone by minimum lot restrictions, the parking planners are also hard at work in Houston. As Donald Shoup explains in his magnum opus on parking regulations and the free market, minimum parking regulations are an oft-used and under-appreciated way for city planners to decrease density, push development farther from the city's core, increase an area's auto dependency, and decrease walkability and the viability of mass transit. Houston's planning code mandates that developers, regardless of what they perceive as the actual demand, build 1.25 parking spaces per apartment bedroom, and 1.33 spaces per efficiency apartment. Retail stores are also saddled with these parking minimums, and even bars as Lewyn notes are required to build "10 parking spaces per 1000 feet of gross area," flying in the face of common sense. To add insult to injury, the city requires that structures on major roads have a significant setback from the street, and the only rational thing to do with this unbuildable space is to put the mandated parking there, meaning that Houston actual codifies the hideous and inconvenient parking lot-out-front model of sprawl that is so typical across the US."
FULL STORY: Urbanism Legend: Is Houston really unplanned?

Eugene Ends Parking Minimums
In a move that complies with a state law aimed at reducing transportation emissions, Eugene amended its parking rules to eliminate minimum requirements and set maximum parking lot sizes.

How Paris, Texas Became a ‘Unicorn’ for Rural Transit
A robust coalition of advocates in the town of 25,000 brought together the funding and resources to launch a popular bus service that some residents see as a mobility lifeline—and a social club.

San Diegans at Odds Over ‘Granny Towers’
A provision in the city’s ADU ordinance allows developers to build an essentially unlimited number of units on single-family lots.

Palo Alto Expands Church ‘Safe Parking’ Program
The city is considering adding commercial lots to the program, which provides safe parking and amenities for people living in cars.

Report: California’s Orphan Wells Still Pose Health Risks
Tens of thousands of idle oil wells litter the state. Taxpayers are often on the hook for cleanup.

Healing Neighborhoods Through Park Equity
Learn more about ways to improve park equity with Norma García-González, the director of the Los Angeles County Department of Parks and Recreation, and Catherine Nagel, the executive director of the City Parks Alliance.
HUD's Office of Policy Development and Research
HUD's Office of Policy Development and Research
Chaddick Institute at DePaul University
Park City Municipal Corporation
National Capital Planning Commission
City of Santa Fe, New Mexico
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.