Fernandez Construction in Chula Vista holds CSLB license #1087083 as a Class B general building contractor, operating from 1st Avenue in the 91911 zip code with a corporation filing effective January 2025. ADU and garage-conversion projects begin with architectural design and plan submittal, often coordinated with firms such as Luis Davalos Design for permit-ready drawings that meet City of Chula Vista setback and parking requirements. The company's scope covers ground-up builds, room additions, roofing, full interior remodels, and residential repairs throughout San Diego County. Re-roofing phases on addition tie-ins require waterproof underlayment and flashing integration by roofing subcontractors including CASAS ROOF INC to maintain a continuous weather barrier across old and new roof planes. Detached ADU foundations involve engineered post-tension slab design with vapor-barrier installation, perimeter stem walls, and plumbing stub-outs positioned per the approved mechanical plan before the concrete pour.