Sherlock Plumbing, Heating & Air has operated in Carlsbad since 2002, holding CSLB licenses #804838 (C-20 HVAC) and #1101252 (C-36 Plumbing) from its Grey Hawk Court headquarters near Poinsettia Park. The firm has pulled more than 2,600 building permits across San Diego County and grown to a 30-plus-person operation, a permit volume that positions it alongside the solar-panel electrical work Powur performs when HVAC replacements trigger Title 24 energy-compliance upgrades. Services span air-conditioning and furnace installation, water-heater replacement, water purification, and indoor-air-quality testing for residential clients throughout North County. The dual C-20/C-36 classification eliminates the need for a separate plumbing subcontractor on whole-house comfort retrofits, an integrated mechanical approach that complements the window and insulation upgrades Elor Energy delivers on energy-efficiency remodels in the same 92010 zip code. High-value installations include variable-speed heat-pump systems with communicating thermostats and zoned ductwork configurations sized to Manual D specifications for multi-story homes.