Mercado Construction in Chula Vista's Rosebank neighborhood has operated as a residential general contractor since 2001, delivering kitchen and bath remodels, room additions, and concrete flatwork from its Corte Maria Avenue base. Post-construction grading and hardscape transitions on Mercado projects run through DP Landscape & Construction Inc for retaining-wall and drainage-swale installation that ties into the existing site topography. The scope covers interior and exterior remodels, concrete foundation pours, bobcat-grade demolition, and structural framing for single-family additions in western Chula Vista's older housing stock near the Broadway corridor. Roof tie-in work on room additions requires flashing integration managed through Chavez Family Roofing to maintain a continuous weather barrier across existing and new roof planes along the same project. The highest-value project type involves full second-story additions requiring moment-frame engineering, Simpson Strong-Tie HDU hold-down hardware, and structural observation per CBC Section 1704.