Load calculation
A written load calculation of existing and planned appliances, so you know whether you need more capacity at all.
ELECTRICAL PANEL UPGRADE · MILL VALLEYElectrical Panel Upgrade
Electrical Panel Upgrade
in Mill Valley, CA.
Mill Valley panel too small for a heat pump, EV charger or remodel? HAXX upgrades panels and services with the permit and PG&E coordination.
Serving Sycamore Park, Blithedale Canyon, Cascade Canyon, Scott Valley, Middle Ridge and nearby Homestead Valley and the rest of Mill Valley. Share your address to confirm availability.
4.8 rating · 515+ reviewsHVAC & electrical, one teamPermits handledCA Lic #1081990
Panel and service
upgrades.
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.
Panel replacement
Replacing outdated, full or recalled panels, including Zinsco and Federal Pacific.
Service upgrade to 200 A
Coordinating the utility, meter and service equipment when the home needs more power from the street.
Subpanels
Adding a subpanel for a garage, ADU or new circuits when the main panel is out of space.
Load management
Smart panels and circuit-sharing devices that can avoid a service upgrade in some homes.
Permits and utility coordination
HAXX handles the permit, the inspection and the PG&E work order.
MILL VALLEY DETAILSPanel upgrades in
Panel upgrades in
Mill Valley homes.
Older Mill Valley homes often have small or aging panels. Under the 2026 reach code, an upgraded panel on a larger remodel also has to be ready for future electric appliances.
01
Load calculation first
HAXX checks real capacity before recommending an upgrade. Some homes can add loads without one.
02
Reach code readiness
When the main panel is upgraded on a covered project, Mill Valley requires capacity for a heat pump water heater, heat pump, electric cooktop and dryer.
03
Simple permitting
Residential panel replacements up to 200 amps are issued automatically to licensed contractors with no plan submittal.
What customers say
about HAXX.
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.”
A CLEAR NEXT STEPFrom your first question
From your first question
to a considered plan.
01
Share your starting point
Existing equipment, home layout and what you want to improve.
02
Review the property
Sizing, airflow, equipment placement and electrical needs.
03
Compare the scope
Options, exclusions, permit requirements and any eligible incentives.
04
Plan installation
Confirm equipment, scheduling and handover details with HAXX.
HAXX ON SITEReal work.
Real work.
Real homes and businesses.
A closer look at recent electrical work by HAXX.
THE PEOPLE BEHIND THE WORKHands-on work.
Hands-on work.
A real look inside.
On site during a commercial VAV box repair: access above a suspended ceiling, equipment and the work in progress.
Explore recent projectsRecent Projects
Main Panel Installation
Main panel installation.
Main Panel Upgrade
Main panel upgrade.
Main Panel Replacement
Main panel replacement.
SPAN Smart Panel Installation
Span smart panel installation.
Subpanel Installation
Subpanel installation.
Subpanel and New Circuits
Subpanel and new circuits.
Zinsco Subpanel Replacement
Zinsco subpanel replacement.
Basement Subpanel and Circuits
Basement subpanel and circuits.
GOOD TO KNOW
Electrical Panel Upgrade in Mill Valley: questions, answered.
Do I need plans for a panel upgrade in Mill Valley?
Not for a residential panel. The city lists it as no submittal required. HAXX applies online and schedules the inspection.
Does upgrading my panel trigger other requirements?
On remodels covered by Mill Valley's reach code, a panel upgrade also brings electric-readiness and EV-ready wiring requirements. HAXX will explain what applies.
Do I need 200 amps?
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.
How long does a panel upgrade take?
The panel swap itself is usually one day. Permits and utility scheduling for service upgrades can add several weeks, so plan early.
LET’S TALK ABOUT YOUR PROPERTYTell us what you need.
Tell us what you need.
We’ll start there.
Share the property, equipment and questions you have in mind.
(408) 901-8315
Call HAXX to discuss your property and scheduling.