At Letter Four, we're building homes that stand up to California's new reality. That means rethinking everything – from the materials we choose to how we protect your investment and your family.

We've formed strategic partnerships and adopted construction technologies that redefine what resilient living actually looks like. Four real solutions that make homes safer, more insurable and built to last:

1. Tilt-up concrete construction through our collaboration with NileBuilt – non-combustible construction, faster timelines.
‍
2. All-steel framing systems with highly-rated fire resistant exterior shells that protect what matters most.
‍
3. Modular construction methods engineered for precision and efficiency, with 2-hour fire resistant building shells, so you can rebuild smarter and faster.
‍
4. Integrated fire-resistant design – from ember-proof detailing to defensible landscape planning to Class A rated materials.
‍
These aren't concepts. They're the practical innovations that protect your family, preserve your investment and move California construction forward.Thoughtful architecture.

Resilient building. No compromises on quality or timeline. Our fully integrated design-build model includes architecture, construction, interior design, and landscape architecture, all under one roof—making the process as seamless as it is inspiring.

Fifteen years in, we’re proud to say that Letter Four has never stopped evolving. With creativity, technology, and compassion at our core, we’re building more than homes—we’re building what’s next for California.