SAN DIEGO CONSTUCTION & DEVELOPMENT
ONE PHASE & Purpose in Every DEVELOPMENT
OnePhase Inc is a San Diego-based construction developer providing end-to-end delivery for residential, ADU, commercial, and retail projects.
OnePhase Inc is a San Diego-based construction developer and design partner backed by over 25 years of industry experience and a 10-year track record as a strong, established company. We deliver residential, ADU, commercial, and retail projects with a streamlined, end-to-end approach—combining architecture, 3D modeling, photoreal rendering, permitting support, and construction management to reduce risk, protect budgets, and bring projects to completion with clarity and confidence.
Here to Assist
From feasibility to final build—OnePhase keeps scope, schedule, and budget on track.