First proposed in 1999, the Centennial project has been litigated and revised for years. The county's Regional Planning Commission has recommended approval, potentially opening another layer of sprawl at the far reaches of Los Angeles County.

The Los Angeles County Regional Planning Commission recommended approval of the proposed Centennial development, which would build 19,000 homes on Tejon Ranch at the northern edge of the county.
"The Regional Planning Commission voted 4 to 1 to recommend that the county Board of Supervisors certify the project’s environmental impact report and approve associated land-use plans and permits, subject to some additional conditions," reports Nina Agrawal.
The project still has to go before the county Board of Supervisors for approval.
Agrawal wrote in feature-length detail about the project earlier this month, prior to the planning commission's hearing. That article places Centennial in context of the region's long history of master planned communities—from Leimert Park to Irvine to Valencia. "But discussion around such developments has shifted over the years, as Los Angeles and much of the country reconsider urban life and as the imperatives to address climate change, an affordable housing crisis and ever-worsening traffic grow more urgent," writes Agrawal.
While the project's developers say the project is needed to provide new, more affordable housing options to the region, others question about the lengths residents will forced to drive to find work. "Environmental advocates also point out that the project’s location — far from the urban centers of Los Angeles, Santa Clarita and the Antelope Valley — and the infeasibility of extending rail service to Centennial will increase the miles people drive, producing more greenhouse gas emissions, air pollution and traffic," according to Agrawal.
FULL STORY: L.A. County planners recommend approval of Tejon Ranch development

What ‘The Brutalist’ Teaches Us About Modern Cities
How architecture and urban landscapes reflect the trauma and dysfunction of the post-war experience.

‘Complete Streets’ Webpage Deleted in Federal Purge
Basic resources and information on building bike lanes and sidewalks, formerly housed on the government’s Complete Streets website, are now gone.

The VW Bus is Back — Now as an Electric Minivan
Volkswagen’s ID. Buzz reimagines its iconic Bus as a fully electric minivan, blending retro design with modern technology, a 231-mile range, and practical versatility to offer a stylish yet functional EV for the future.

Healing Through Parks: Altadena’s Path to Recovery After the Eaton Fire
In the wake of the Eaton Fire, Altadena is uniting to restore Loma Alta Park, creating a renewed space for recreation, community gathering, and resilience.

San Diego to Rescind Multi-Unit ADU Rule
The city wants to close a loophole that allowed developers to build apartment buildings on single-family lots as ADUs.

Electric Vehicles for All? Study Finds Disparities in Access and Incentives
A new UCLA study finds that while California has made progress in electric vehicle adoption, disadvantaged communities remain underserved in EV incentives, ownership, and charging access, requiring targeted policy changes to advance equity.
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.
City of Albany
UCLA Lewis Center for Regional Policy Studies
Mpact (formerly Rail~Volution)
Chaddick Institute at DePaul University
City of Piedmont, CA
Great Falls Development Authority, Inc.
HUDs Office of Policy Development and Research