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 1,000+ cubic feet of space the heat pump needs to operate efficiently. SCE rebates ($300-$1,500) make hybrid HPWHs cost-competitive with high-end tankless systems.