When planning an ADU electrical panel installation, several key factors come into play. The cost and complexity of an electrical panel upgrade for an accessory dwelling unit (ADU) vary case by case, depending on the existing electrical system, power demands, panel placement, and city permit requirements.
At LA Pro Electrical, we specialize in ADU electrical service upgrades, providing expert panel installations, subpanel setups, and full electrical solutions to ensure your project is code-compliant and ready for inspection. We also offer permit assistance and competitive pricing, often beating existing bids by 8%-20%.
When Do You Need an ADU Electrical Panel Upgrade?
Understanding when to upgrade your ADU’s electrical panel is crucial in the build-up stage of your project. The timing and placement of the main panel or subpanel should be planned early to avoid costly modifications later. Here are key factors that determine when an upgrade is necessary:
Existing Panel Capacity – If your home has a 100-amp panel, it will likely require an upgrade to 200 amps to accommodate an ADU’s electrical needs.
Number of Appliances & Electrical Load – Factors like HVAC systems, 240V appliances, and EV chargers significantly impact whether a panel upgrade is required.
Permit Requirements – Los Angeles and surrounding areas have strict electrical code compliance standards for ADU projects, making proper panel placement and power calculations essential.
Attached vs. Detached ADUs – A detached ADU may require a subpanel installation, while an attached ADU may utilize an expanded main panel.
Distance Between the ADU & the Main Panel – Wiring costs increase with distance, making proper panel placement a key cost factor.
Electrical Panel Installation Costs for ADUs in Los Angeles, CA
The cost of an ADU electrical panel upgrade varies depending on multiple factors, such as:
Upgrading from 100-amp to 200-amp panel – $2,500 to $5,500
Installing a new 200-amp panel for ADU – $3,000 to $7,000
Subpanel installation for ADU – $1,200 to $3,500
Main panel replacement & rewiring – $4,000 to $10,000
Permit fees for electrical panel upgrade – $200 to $800 (varies by city)
Do You Need a Subpanel or a Full Panel Upgrade?
A subpanel installation may be the best option if:
Your main panel has enough capacity but lacks space for additional breakers.
Your ADU is detached, requiring a separate panel for power distribution.
You want to isolate circuits for better electrical management.
A full panel upgrade is necessary if:
Your home’s main panel is outdated or at capacity.
Your ADU requires high-power appliances like an HVAC system, EV charger, or multiple 240V outlets.
You need to future-proof your electrical system for additional expansion.
Permit & Code Compliance for ADU Electrical Panel Upgrades
Permits are required for electrical panel installations in Los Angeles, ensuring compliance with Title 24 electrical requirements.
How to Obtain a Permit for an ADU Electrical Panel Upgrade:
Consult with a Licensed Electrician – At LA Pro Electrical, we handle the entire permitting process for our clients.
Submit Plans to the Building & Safety Division – Your panel upgrade must meet California Electrical Code requirements.
Schedule an Inspection – The city will inspect your panel placement, wiring, and load calculations before final approval.
Receive Approval & Complete Installation – Once approved, we complete the installation and schedule a final inspection.
Factors That Affect ADU Electrical Panel Upgrade Cost
Panel Size (100-amp vs. 200-amp vs. 400-amp panels)
Distance from Main Panel to ADU
Additional Circuits & Breaker Upgrades
Subpanel vs. Full Panel Upgrade
Permit & Inspection Fees
Rebates & Incentives – Discounts are available for combined panel upgrades and EV charger installations.
Why Choose LA Pro Electrical for Your ADU Electrical Upgrade?
Licensed & Insured ADU Electricians – Specializing in panel installations and subpanels.
Competitive Pricing – We beat most quotes by 8%-20%.
Online Quote System – Upload your plans for a free estimate.
Full-Service Electrical Solutions – From panel upgrades to wiring and inspection approvals.
Trusted by ADU Builders – With over 300 ADU electrical projects completed since 2017.
Get a Quote for Your ADU Electrical Panel Upgrade Today!
If you’re planning an ADU and need a panel upgrade or installation, LA Pro Electrical is here to help. Whether you need a subpanel for a detached ADU or a full 200-amp panel upgrade, we offer expert services at competitive rates.
Get a Free Quote and let us help you save on your ADU electrical installation costs today!
