San Diego ADU Construction | OnePhase General Contractor
Project Details
Client
Private
Location
San Diego, CA.
Category
ADU Construction
Type
Home Addition
Type
Additional Unit 2 Story
Home Addition
This two-story, 1,200 sq ft ADU on Derrick Dr. in San Diego was delivered through a streamlined design-to-build workflow led by OnePhase Inc. The project was planned to maximize usable space while maintaining a clean footprint and efficient site integration—balancing privacy, access, and livability with buildable detailing and permit-aware documentation.
ADU Construction
The architectural approach prioritized a practical layout with strong vertical efficiency—clear separation of living and private zones, optimized circulation, and thoughtful placement of openings for natural light and ventilation. Throughout design development, decisions were aligned with realistic budgeting and construction sequencing to reduce mid-project revisions and protect the schedule.
As the executing contractor, OnePhase Inc coordinated permitting support, procurement, trade scheduling, inspections, and quality control from mobilization through closeout. The result is a fully realized, modern two-story ADU that adds meaningful square footage and long-term value—delivered with disciplined project management and consistent build quality from concept to completion.