With a powerful combination of business acumen and hands-on construction expertise, we’ve spent the last 15 years building a reputation as a premier ground-up residential construction company – specializing in advanced home hardening and fire defense technologies.

Our deep involvement in the aftermath of the devastating 2017 and 2019 Sonoma County fires went beyond rebuilding houses – we helped restore entire communities. These neighborhoods have since re-emerged stronger, safer, and more resilient than ever.

Now, we’re bringing that same dedication to Southern California. We understand that rebuilding after a fire is more than a construction project – it’s an emotional journey. That’s why we’re committed to guiding our clients through every step of the process, offering not just technical expertise but genuine support.

We are your team. And we’re here to help you rebuild your home—and your peace of mind—with strength, safety, and care.

ADAM JAMES DIAZ graduated from Cal Poly, San Luis Obispo with a degree in Construction Management and Architectural Engineering.  Following an extensive career with DPR Construction, Adam saw an opportunity to better serve Sonoma, Napa, and Marin Counties with his ability to deliver high-end custom residential construction projects through the time-tested values of hard work, respect, and trust. Adam founded AJD Builders in 2010, out of a passion to collaborate with homeowners and fulfill their vision of an ideal home.

LESLIE ONSAGER was captivated by the thrill of witnessing renovations and ground-up projects unfold from blueprints while closely observing her family’s business. This experience instilled in her the significance of meticulous attention to detail, adhering to plans, implementing value engineering, and embracing high design principles within the realm of construction. Her innate sense of design aesthetics naturally propelled her towards a career in interiors, yet she aspired to provide her clients with a more comprehensive service. In 2008, she transitioned into the role of a general contractor, aiming to deliver a full spectrum of design-build services. Leslie’s work is characterized by timeless, pristine selections, ensuring each client receives a result that impeccably mirrors their unique aesthetic preferences.