Interactive Mapping Tool Illustrates the Impact of California's Big Housing Bill

University of California, Berkeley researchers have mapped the impact of SB 50, a bill that would allow new density around train stations and bus stops in cities all over the state of California.

2 minute read

April 10, 2019, 12:00 PM PDT

By James Brasuell @CasualBrasuell


Tassafaronga Village Oakland California

Mark Hogan / Flickr

A new interactive mapping tool from the urban Displacement Project and the Terner Center for Housing Innovation at the University of California, Berkeley illustrates the potential impact of SB 50, the statewide transit oriented upzoning bill authored by State Senator Scott Weiner as a follow up to last year's SB 827.

Jenna Chandler reports on the new mapping tool, explaining how to use the map to visualize the changes the bill could clear the way for in the name of creating more housing supply and lowering housing costs around the state.

"The analysis and map look at neighborhoods surrounding 'high-quality' transit stops and categorize them into five neighborhood types based on existing density and income: high density and high income (blue); high density and low income (green); low density and high income (red); low density and low income (yellow); and low density and diverse (purple)," explains Chandler.

"They study takes into consideration how much land is zoned for residential uses, how much is vacant and 'underutilized,' and how many existing buildings are renter-occupied. To help prevent displacement, SB 50 has a provision that exempts buildings that have been occupied by tenants within the past seven years."

Carolina Reid, faculty research advisor for the Terner Center for Housing Innovation, is also quoted in the article providing more insight into the message the team hoped to impart in creating the mapping tool.

Tuesday, April 9, 2019 in Curbed Los Angeles

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Wastewater pouring out from a pipe.

Alabama: Trump Terminates Settlements for Black Communities Harmed By Raw Sewage

Trump deemed the landmark civil rights agreement “illegal DEI and environmental justice policy.”

April 13, 2025 - Inside Climate News

High-rise apartment buildings in Waikiki, Hawaii with steep green mountains in background.

Study: Maui’s Plan to Convert Vacation Rentals to Long-Term Housing Could Cause Nearly $1 Billion Economic Loss

The plan would reduce visitor accommodation by 25% resulting in 1,900 jobs lost.

April 6, 2025 - Honolulu Civil Beat

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

April 10, 2025 - Diana Ionescu

A line of white wind turbines surrounded by wheat and soybean fields with a cloudy blue sky in the background.

Wind Energy on the Rise Despite Federal Policy Reversal

The Trump administration is revoking federal support for renewable energy, but demand for new projects continues unabated.

5 hours ago - Fast Company

Red and white Caltrain train.

Passengers Flock to Caltrain After Electrification

The new electric trains are running faster and more reliably, leading to strong ridership growth on the Bay Area rail system.

6 hours ago - Office of Governor Gavin Newsom

View up at brick Catholic church towers and modern high-rise buildings.

Texas Churches Rally Behind ‘Yes in God’s Back Yard’ Legislation

Religious leaders want the state to reduce zoning regulations to streamline leasing church-owned land to housing developers.

6 hours ago - NBC Dallas