What state law actually says
California Government Code Section 65852.2 specifically prohibits local agencies — cities and counties — from requiring a separate utility connection or meter for an ADU as a condition of approval. This was written into state law specifically to reduce a cost barrier to building ADUs. But this rule binds cities, not utility companies, and that distinction matters more than it might seem.
Where the utility company's own rules take over
Electric and gas utilities set their own technical service policies, separate from what your city can require. In Southern California Edison and SoCalGas territory — which covers most of our service area — utility policy commonly requires a genuinely separate address for the ADU in order to issue a new electric meter, effectively pushing many detached ADU projects toward separate metering in practice, even though your city itself isn't the one requiring it. If your ADU includes gas appliances, SoCalGas may similarly require its own new gas meter for the unit.
| Utility | Typical Practice for a Detached ADU |
|---|---|
| Electric (SCE, in most of our service area) | Commonly requires a separate assigned address for the ADU to issue a second meter — a shared meter with submetering may be an option in some cases, but confirm directly with the utility. |
| Gas (SoCalGas, in most of our service area) | May require a separate gas meter if the ADU includes vented gas appliances. |
| Water | Requirements vary by local water provider and unit size; larger ADUs are more likely to need an independent connection. |
This table describes common practice, not a guarantee for your specific property or utility account — confirm directly with your utility provider before finalizing your design, since policies and local exceptions can vary.
Why this matters for your budget
A separate meter typically means additional trenching, panel or subpanel work, and utility application fees on top of your core construction cost — costs that aren't always obvious from a general per-square-foot estimate. See our ADU cost guide for how utility connection costs fit into your overall budget, and confirm actual utility fees directly with your provider rather than relying on general estimates, since they vary by city and by utility account.
This is general information, not a quote or guarantee
Utility metering policy can change and varies by provider, by property, and by project type. This page describes common patterns in Southern California Edison and SoCalGas territory, not a specific determination for your property. Contact your utility provider directly early in your design process to confirm requirements and costs.
Frequently asked questions
No — California Government Code Section 65852.2 specifically bars local agencies from requiring a separate utility connection or meter as a condition of ADU approval. This rule applies to cities, not to your utility company's own service policies.
Because your electric or gas utility sets its own technical service requirements, independent of city zoning rules. In much of our service area, Southern California Edison commonly requires a separate assigned address to issue a new meter for a detached ADU, which effectively leads to separate metering in practice.
Often the requirements are less strict for attached units or conversions, since shared service with the main house is more commonly workable. Confirm directly with your utility provider, since practices vary by project type and location.