Electrical HVAC

Electrical and HVAC for garage conversions across San Diego County

Most San Diego County garage conversions require electrical panel upgrades, new circuits, and a mini-split or forced-air HVAC system before the converted space is livable or code-compliant. We connect homeowners with insured C-10 electrical and C-20 HVAC crews that assess the existing panel capacity, specify the right HVAC system for the converted square footage and orientation, and complete all rough-in and finish electrical and mechanical work under permit. Garage Convert SD is a referral service, insured but not licensed, cslb.ca.gov.

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Electrician installing a subpanel and new circuits in a San Diego County garage being converted to an ADU

What's included in this service?

Electrical panel load calculation to confirm whether a subpanel, panel upgrade, or utility service upgrade is required
Subpanel installation in the converted space with dedicated circuits for HVAC, lighting, outlets, and kitchen or bathroom loads
SDG&E utility coordination if a second meter or separate service is required for a full ADU conversion
Ductless mini-split selection, sizing, and installation for heating and cooling the converted space without existing ductwork
Forced-air connection or new air handler if the home has an existing ducted system that can serve the converted space
Permitted electrical and mechanical rough-in timed to the framing and insulation phase so inspections are not delayed

When do you need this service?

Your main electrical panel is at or near capacity and cannot support a new HVAC system and kitchen circuits without an upgrade
The garage has no existing electrical circuits or only a single 15-amp circuit that cannot support habitable use
You are converting to a full ADU and need a separate meter and SDG&E account for the new unit
Summer temperatures in your San Diego County location, particularly inland, make a HVAC system essential rather than optional
The permit drawings call for a minimum heating and cooling system and the existing garage has none

What do homeowners ask about Electrical HVAC?

How much does electrical and HVAC cost for a garage conversion in San Diego?

Electrical and HVAC work for a garage conversion typically runs $8,000-$25,000 depending on whether a panel upgrade is required, whether the ADU needs a separate meter, and the size of the HVAC system. A simple subpanel with circuits and a mini-split is at the lower end. A full 200-amp panel upgrade plus separate service and a multi-zone HVAC is at the higher end. The crew quotes after reviewing the existing panel.

What type of HVAC system works best in a converted San Diego garage?

A ductless mini-split is the most practical HVAC system for a converted garage in San Diego County. It does not require existing ductwork, installs in a day, heats and cools efficiently, and qualifies for SDG&E rebates under certain efficiency ratings. Inland San Diego locations like Santee, El Cajon, and Escondido see summer temperatures that make a properly sized mini-split essential. The crew sizes the unit to your converted square footage and window orientation.

Does a full ADU need its own electrical meter in San Diego?

California law allows but does not require a separate electrical meter for a full ADU. Many homeowners choose a subpanel arrangement where the ADU shares the main home service and the tenant pays a flat utility allowance. A separate meter requires SDG&E coordination and a new service connection, which adds cost and lead time. The crew reviews both options at the on-site estimate.