Los Angeles loves its myths, and the greatest one is the single-family home. For nearly a century, the dream of Southern California was horizontal. You bought a plot, put up a stucco box, built a fence, and ignored your neighbors. But that dream broke the city, leaving it stranded in gridlock and pricing out three-quarters of its residents.
Lorcan O'Herlihy spent three decades smashing that myth to pieces.
The Dublin-born architect, who passed away on June 14, 2026, at age 66 from glioblastoma, looked at the concrete sprawl of LA and saw something different. He didn't see a collection of isolated lots. He saw a landscape starving for community. Through his firm, Lorcan O'Herlihy Architects (LOHA), he built a massive body of work that proved density doesn't have to be depressing, and social housing doesn't have to look cheap. He basically dragged Los Angeles housing into the modern era by refusing to build walls.
Architecture is a Social Act
If you want to understand why O'Herlihy mattered, you have to look at how he defined his job. To him, buildings weren't just objects or monuments to an architect's ego. He championed a simple idea: architecture is a social act.
Before launching LOHA in 1994, he worked under heavyweights like Kevin Roche, Steven Holl, and I.M. Pei, even working on the glass pyramid at the Louvre. That gave him serious technical chops. But his real education came from growing up in the dense, pedestrian-heavy cities of Europe. When he brought that sensibility back to California, it clashed directly with the local obsession with private property.
Most multi-unit developments in LA are what locals call "dingbats" or podium buildings. They maximize the lot, wrap everything in a tight skin, and put a massive security gate right on the sidewalk. They shut out the neighborhood.
O'Herlihy threw that playbook in the trash. He pushed security gates away from the street, inviting the public realm into the property. He created internal courtyards, open-air walkways, and shared roof decks. His layouts forced people to look at each other, talk to each other, and coexist. He took the classic Southern California courtyard apartment and weaponized it for urban equity.
The Vermilion Experiments
Look at Formosa 1140, built in West Hollywood back in 2009. It's a striking eleven-unit complex wrapped in a vivid, skin-like corrugated metal facade painted deep vermilion and orange. Most developers would have pushed the building right to the property line to squeeze out every square inch of rentable space.
Instead, O'Herlihy and his team pushed the building back. They carved out a slice of the private lot and handed it over to the city as a public pocket park.
It was a radical move. By cutting into the private footprint, he created a communal anchor. The building's external walkways face this park, turning the entire structure into a theater of neighborhood life.
He did it again in Koreatown with Mariposa 1038. The building features a pure white, curving exterior that literally dimples inward, pushing away from the street to create a pocket of breathing room on a dense sidewalk. In the center, he carved out a massive, sculptural open-air courtyard that channels light and air directly into every single apartment. Residents don't walk down dark, carpeted interior hallways that smell like their neighbor's dinner. They walk outside, exposed to the sky, looking down into a shared social hub.
Erasing the Line Between Luxury and Affordable Housing
The real tragedy of American architecture is the visual segregation of poverty. Affordable housing usually looks like an afterthought—bland, grey, institutional, and cheap. O'Herlihy rejected the idea that design excellence belonged exclusively to the wealthy.
In South Los Angeles, LOHA completed MLK1101 Supportive Housing in 2019. It provides 26 units for formerly unhoused individuals and low-income families. Instead of building a fortress, O'Herlihy built a sprawling, light-filled complex with a street-facing staircase that acts as a stoop. It features community rooms, a shared kitchen, and a rooftop garden. It looks like a high-end boutique complex in Santa Monica, but it costs a fraction of the price to run because of its passive cooling design.
Then came Isla Intersections in 2025. Located on an industrial, leftover island of land near a major freeway interchange, the project uses repurposed shipping containers to form 54 units of supportive housing.
Instead of stacking the containers like a boring cargo ship, LOHA shifted them, creating a jagged, dynamic layout linked by an open-air pedestrian paseo. The project didn't just give people a roof; it gave them a lush, green corridor that filters highway air pollution, paired with spaces for job training and creative programming. It won major recognition, including the Record Awards, because it tackled the housing crisis with dignity rather than compromise.
The Blueprints Left Behind
O'Herlihy wasn't just a theorist; he was a builder. He completed more than 100 projects across three continents, racking up over 200 design awards, including the AIA California Lifetime Achievement Award. He also spent years teaching the next generation at the USC School of Architecture, hammering home the idea that architects must operate within political and social structures to solve real-world problems.
His death is a massive loss for Southern California, but his firm isn't disappearing. In March 2026, just months before his passing, O'Herlihy transitioned LOHA to a collective ownership model, elevating seven longtime collaborators to leadership roles. The studio is already carrying his vision forward, pushing into cities like Detroit with their 23-building City Modern neighborhood development.
If you want to honor his legacy, stop looking at apartment buildings as eyesores that ruin your neighborhood's parking. The next time you walk past a new housing development, look at how it treats the sidewalk. Does it wall itself off, or does it offer something back to the street? O'Herlihy showed us that density can be beautiful, humane, and deeply generous. The tools are right there on the table. It's up to the rest of the city to use them.
