Field notes from the 4C team.
Conversations, project updates, and behind-the-scenes looks at how we're building fire-resilient, factory-built systems across California.
Latest posts
Yonah Naftaly on Clarity in Action: Can We Build Better Homes Faster and Cheaper?
Our co-founder and CEO on the Clarity in Action podcast: lessons from two off-site construction startups, why 4C didn’t go modular, one panel in steel or wood, and building to work alongside builders and contractors.
October 21, 2026 · 6 min read
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4C Hosts AIA San Francisco’s CRAN for a Factory Tour on November 18
We’re opening our Hayward factory to the Custom Residential Architects Network: a working tour of factory-built architecture, why architects belong at the table from day one, and an open invitation to Bay Area architects. 1 AIA LU|HSW.
October 20, 2026 · 5 min read
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Fire-Resistant House Materials: What Actually Works in a Wildfire Zone
Which roof, vents, siding, windows, decks and framing hold up in a wildfire, what California’s wildfire code requires, and where most rebuilds leave a gap: the frame behind the cladding.
October 19, 2026 · 10 min read
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Panelized vs. Modular vs. Stick-Built: How to Choose the Right Construction Method
An honest comparison of the three main ways buildings get built, what each does well, where each struggles, and why ICC-ES certification matters, and which projects are the best fit for panelized construction, from custom homes to multifamily.
October 6, 2026 · 11 min read
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Escondido: Fire-Resilient Hillside Construction Lessons
How we built a fire-resilient, WUI-compliant home on a steep San Diego County hillside — site work, the County approval process, our project partners, and press coverage.
September 22, 2026 · 12 min read
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Why We Started 4C:
A Conversation with Yonah Naftaly
4C's CEO and co-founder on why construction needed a manufactured system, why fire-rated assemblies were part of the plan years before wildfire rebuilding became a statewide conversation, and why most rebuilds still default to conventional framing.
September 15, 2026 · 6 min read
Read the interviewNew posts are on the way.
We'll be sharing more conversations with the people building the 4C system, project updates, and behind-the-scenes looks at our manufacturing process. Check back soon, or follow us on LinkedIn.
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