Electrical work for San Diego businesses

Where the no-plan permit stops

San Diego’s Development Services Department runs a quick track for small jobs. It is called a Simple permit, and it covers electrical work on single-family homes and duplexes without plans. For anything else the city says plans and calculations are required. A tenant improvement, which the city defines as a nonstructural interior alteration to an existing commercial or industrial space, needs a building permit with plans.

Some electrical work gets its own permit. The city’s example is breakers over 400 amps, which need a stand-alone electrical permit submitted with building plans. The practical effect for a business owner is time. A job that would be same-day in a house may sit in review for a commercial suite, so the lease start date and the permit date should be planned together. The tenant improvement electrical page lists what a plan set usually includes.

Fire permits that come with the job

The fire side is separate. San Diego’s fire permit page says a fire permit is required before altering, adding to or replacing a fire alarm or fire suppression system, while routine maintenance is exempt. Two affidavits let small changes skip plans. Form DS-163 covers up to four devices or appliances in an existing alarm system. Form DS-161 covers up to 20 sprinklers in a light hazard wet system. A licensed professional signs each one and the city inspects the work. All other tenant improvements and new buildings must provide plans and calculations, and alarm design follows the California Fire Code, the California Electrical Code and NFPA 72.

For a restaurant or retail space that adds a hood, a larger exit sign package or a few strobes, find out early which affidavit applies. The restaurant and retail electrical page covers the equipment side.

Charging in a commercial lot

Information Bulletin 187, dated May 2026, is the city’s checklist for chargers. An electrical permit is required. A building permit is needed only if there is new construction or an alteration to a structure. Commercial and multifamily chargers without a building permit apply as a stand-alone electrical, mechanical and plumbing permit with plans, and the plans must be approved first.

The bulletin lists what the plans carry. Electrical plans are signed and stamped by a California registered electrical engineer or a licensed C-10 contractor. They show a single-line diagram, fault current calculations, a panel schedule and charger data sheets. The load calculation includes existing and proposed loads, and unless equipment is listed for continuous duty the calculated load stays within 80 percent of the equipment rating. Accessible charging stations have to follow the California Building Code, Chapter 11B. The bulletin recommends talking to the utility before installation. See commercial EV charging for the wider picture.

SDG&E: delivery, rates and a closed program

SDG&E serves every San Diego business meter. Its AL-TOU schedule is the standard commercial and industrial tariff at 20 kW of maximum monthly demand and above, and small commercial accounts below that line use the TOU-A family, according to SDG&E’s rate summary. Schedule changes take effect more than once a year, so use the current table.

SDG&E’s Power Your Drive workplace program says it is fully subscribed and not accepting applications. Anyone planning a workplace charger should check what incentives are open before budgeting. The SDG&E programs guide tracks the household programs, and panel and service upgrades explains the utility steps.

Downtown and the Gaslamp Quarter

The Gaslamp Quarter has its own planned district ordinance and design guidelines. The Gaslamp Quarter Association’s land use committee advises the city on facade, signage, awning, sidewalk cafe, storefront and tenant improvement changes. Interior wiring is rarely visible from the street. Exterior conduit, new blade signs and meter locations are. A tenant in a historic Gaslamp building should ask what the district reviews before the electrician orders a sign circuit.

What to send

Commercial electrical work in San Diego is available through the partner electrician. Send the building type, the address, whether you are the tenant, the owner or the property manager, and what is wrong or planned. A photo of the main panel and the meter helps. Start from the commercial hub, the San Diego residential page or the county page.