Fullerton ADU Builder

At Fullerton ADU Builder, we help homeowners create functional, code-compliant ADUs for rental income, multi-generational living, or added property value. Our experienced team handles everything — site evaluation, custom design, city approvals, and construction — so you can focus on your goals. We proudly serve Fullerton and the greater Orange County area, delivering durable craftsmanship, transparent pricing, and on-time project completion. Whether you’re building a backyard cottage or converting an existing garage, we provide reliable, end-to-end ADU solutions.