Oak Hills water heater work is different from Hesperia tract-home work because larger custom homes (2,500-4,000+ sq ft) typically need 75-80 gallon tanks instead of 40-50 gallon standard, or whole-home tankless systems sized for 4+ bathroom households. Custom-home water heater installs are larger jobs with bigger equipment, longer install timelines, and higher upfront cost than tract-home swaps. Mixed gas service (SoCalGas + propane) means we confirm fuel type at the door and carry both natural gas and propane orifices, regulators, and parts on every Oak Hills dispatch. Propane water heater installs add $300-$700 over natural gas equivalent due to orifice sizing and regulator work. Hybrid heat pump water heaters are particularly attractive in Oak Hills because larger garages provide the roughly 700 to 1,000 cubic feet of space the heat pump needs to operate efficiently. SCE rebates make hybrid HPWHs cost-competitive with high-end tankless systems.