Custom ADU Builders California Modulars

California Modulars is a State of California HCD-certified modular manufacturer and licensed general contractor specializing in custom accessory dwelling units (ADUs). They provide a full turn-key ADU building service — from design and engineering to permitting, fabrication, delivery, and installation — with flexible options tailored to your site and vision. Their modular ADUs meet California Title 24 and CalGreen standards, offering quality, sustainability, and efficient project management.