Mission Hills presents the most demanding repiping scenario in San Diego. The neighborhood's extraordinary concentration of early 20th century architecture — grand Craftsman homes from the 1910s, Prairie-style residences, elegant Spanish Revival and Mission Revival estates from the 1920s–30s — means nearly every repipe must navigate historic plaster walls, irreplaceable tile work, original woodwork, and architectural details that cannot be damaged or replicated. At the same time, the plumbing infrastructure in these homes is among the oldest in the city, with many properties still operating on original galvanized steel or even lead service lines.Homewerx has developed specialized techniques for Mission Hills repiping that prioritize preservation. We route new PEX or copper through existing pipe chases, closet interiors, under-floor crawl spaces, and attic access wherever available — minimizing the number of wall penetrations required. When walls must be opened, we use the smallest possible access points positioned in the least visible locations. Our restoration partners specialize in plaster repair and historical finish matching. The goal is a modern plumbing system behind walls that look untouched.