Otto ADU is a Los Angeles design-build firm that has completed 70+ ADUs across LA County — from Pasadena to Venice, Eagle Rock to Santa Monica. Their in-house team handles design, engineering, and permitting, then manages construction through vetted subcontractors so homeowners never have to coordinate trades themselves. Every project gets a dedicated Homeowner Portal with real-time updates, permit documents, and direct team messaging. Their portfolio covers garage conversions, detached backyard units, and attached additions — with transparent pricing and full scope of work delivered upfront before anything is signed. CSLB license active, bond on file, no complaints on record.