Load calculation
A written load calculation of existing and planned appliances, so you know whether you need more capacity at all.
Larkspur panel too small for a heat pump, EV charger or remodel? HAXX upgrades panels and services, files the eTRAKiT permit and works with PG&E.
Serving Downtown Larkspur along Magnolia Avenue, Madrone Canyon, Greenbrae, Larkspur Landing and Murray Park and the rest of Larkspur. Share your address to confirm availability.

Most panel projects start with a heat pump, EV charger, induction range or remodel. HAXX begins with your real electrical load and only upgrades what the numbers require.
A written load calculation of existing and planned appliances, so you know whether you need more capacity at all.
Replacing outdated, full or recalled panels, including Zinsco and Federal Pacific.
Coordinating the utility, meter and service equipment when the home needs more power from the street.
Adding a subpanel for a garage, ADU or new circuits when the main panel is out of space.
Smart panels and circuit-sharing devices that can avoid a service upgrade in some homes.
HAXX handles the permit, the inspection and the PG&E work order.
Larkspur was laid out in 1887, and much of Marin's housing predates 1980. Older services and fuse panels are common in the historic downtown and the canyons.
HAXX measures real capacity before recommending an upgrade. Some homes can add a heat pump or charger without one.
Larkspur lists electrical service changes as simple permits, with review in about 2 to 3 working days once the submittal is complete.
A service upgrade needs PG&E to disconnect and reconnect power. HAXX schedules the work around that.
Rated 4.8 across 515+ reviews on Housecall Pro, Google and Facebook. Read more reviews.
“Recently, my dishwasher stopped working, and they discovered it was actually an outlet issue. Not only did they diagnose it quickly, but they also fixed the outlet—saving me from calling an electrician. Reliable, professional, and skilled at handling both appliances and electrical issues.”
“I purchased a couple of ceiling fans and was reluctant due to how old my house was with old wiring so I wanted someone professional and trustworthy. They have been both!”
“Prompt and professional - they helped run a new thermostat wire through a wall and crawl space.”
Existing equipment, home layout and what you want to improve.
Sizing, airflow, equipment placement and electrical needs.
Options, exclusions, permit requirements and any eligible incentives.
Confirm equipment, scheduling and handover details with HAXX.
A closer look at recent electrical work by HAXX.

On site during a commercial VAV box repair: access above a suspended ceiling, equipment and the work in progress.
Explore recent projects
Main panel installation.

Main panel upgrade.

Main panel replacement.

Span smart panel installation.

Subpanel installation.

Subpanel and new circuits.

Zinsco subpanel replacement.

Basement subpanel and circuits.
Larkspur lists about 2 to 3 working days of review for simple permits, which include service changes. There is no over-the-counter issuance.
Many do. MCE notes that homes built before 1979 may need panel and wiring upgrades. A load calculation shows what your home needs.
Not always. A load calculation shows whether your current service can carry the new appliances, sometimes with load management. HAXX recommends an upgrade only when the numbers require it.
The panel swap itself is usually one day. Permits and utility scheduling for service upgrades can add several weeks, so plan early.
Share the property, equipment and questions you have in mind.
(408) 901-8315
Call HAXX to discuss your property and scheduling.
