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Full-service San Francisco Architectural Practice Specializing in Smart Solutions to Complex Design Problems

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AB 507 article image

Narrow but Mighty AB 507: California’s New Adaptive Reuse Law

Two recent HCD Technical Assistance letters clarify how density and existing homes are treated under SB 684 and SB 1123, providing a clearer framework for evaluating small-lot infill opportunities in California.

Wilshire Boulevard from the new David Geffen Galleries at LACMA designed by Peter Zumthor, photo by the Author Mark Hogan

Notes from the California Infill Summit: Inside SB 1116’s Fix for SB1123

I attended this year’s California Infill Summit, hosted by the Council of Infill Builders in Los Angeles.  The land use panelmoderated …

SB 684 and SB 1123 housing

SB 1123 & SB 684: Density Calculations and Vacant Lots Explained 

Two recent HCD Technical Assistance letters clarify how density and existing homes are treated under SB 684 and SB 1123, providing a clearer framework for evaluating small-lot infill opportunities in California.

SB 79 Explained: California's New Transit-Oriented Development Law - an image of SF transit

SB 79 Explained: California’s New Transit-Oriented Development Law

On July 1, 2026, SB 79 went into effect throughout California. The bill establishes increased building height and density regulations …

Multifamily ADUs in California - converted garages, a man walking his dog in front of a unit

A 2026 Guide to Multifamily ADUs in California

Multifamily ADUs in California can be added for a fraction of the cost of new construction and the land is …

Los Angeles ADU conversion on a multifamily property with ground-floor residential units

New Los Angeles ADU Ordinance: Height Bonus and Commercial Conversions Explained

Los Angeles has proposed a new ADU ordinance that updates the city's approach to accessory dwelling units, and two changes …

Map of San Francisco's Downtown Revitalization Zone showing the eligible district boundaries for the office-to-residential conversion financing program

San Francisco’s Downtown Revitalization Financing District – How the Incentive Works for Office-to-Residential Conversions

Housing converted from downtown San Francisco's empty offices and commercial buildings can receive annual payments for up to 30 years …

Kitchen and living room of an ADU in Mission co-housing

San Francisco Coliving and Cohousing Code Reform: “Shared Housing for All” Passes the Board of Supervisors

San Francisco coliving just took a major step forward, as The San Francisco Board of Supervisors voted to remove the …

A Shift in the City’s Fabric: Understanding San Francisco’s New Family Zoning Plan

San Francisco’s newly adopted Family Zoning Plan marks a major shift in how the city thinks about growth, equity, and …

Repurposing Chain Stores to housing in California

Repurposing Chain Stores in California: How State Housing Laws and Zoning Reforms Are Rewriting Commercial Land Use

A new wave of California housing laws is turning big-box retail sites into test cases for infill housing and mixed-use redevelopment.

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