Interwest Electric operates from Suite D at 5837 Mission Gorge Road in Grantville, serving residential, commercial, and industrial clients across San Diego's 92120 ZIP under CSLB #477012 since 1985. Owner Dean Mastrovic also holds California State Engineering Contractor License #1123916, and the company maintains Eaton Certified contractor status and membership in the International Association of Electrical Inspectors, which governs code-compliance standards for field installations. The residential service menu covers panel upgrades, whole-house rewiring, EV charger circuit installation, ceiling fan wiring, bathroom exhaust fan replacements, recessed lighting layouts, and Lutron switch and dimmer programming. Mission Gorge Road's commercial corridor generates industrial electrical demand from the auto dealerships, warehouse operations, and multi-tenant office parks that line the street between Fairmount Avenue and Mission Trails Regional Park, and Harbor Pest Control handles the rodent and insect treatments in the same Grantville commercial buildings where Interwest maintains the electrical infrastructure. Commercial scope includes three-phase power distribution, motor controls, parking lot and facade lighting, sign circuits, and emergency generator transfer-switch installations. Industrial work covers conduit runs, motor terminations, control wiring, and arc-flash labeling for manufacturing and distribution facilities. The Eaton certification means Interwest specifies and installs Eaton breaker panels, switchgear, and UPS systems with factory-backed warranty support, a procurement channel that reduces lead times on panel components. For Grantville commercial projects where electrical design integrates with architectural planning, Domeier Architects Inc handles the building design side of tenant improvement and new-construction work in the same corridor. Interwest dispatches crews for service calls across the full week and maintains BBB accreditation with an A-plus rating through the Pacific Southwest regional bureau.