JGriggs Construction is an Oakland-based family-owned general contractor with 30+ years of Bay Area construction experience. Led by Jordan Griggs — named by name in every review for responsiveness, craftsmanship, and honesty. Holds both a Class B General Building license and a C-47 Manufactured/Modular Home Installer license, making them one of the few Bay Area contractors qualified to design, build, and install both site-built and modular ADUs. Services include ADU construction, garage conversions, home renovations, earthquake retrofits, foundations, concrete work, and deck building.