ADU & Granny Flat Electrical Metering in Ontario, CA - Just Electric Services
Posted on April 12, 2026 by Just Electric Services
Understanding Electrical Metering for Accessory Dwelling Units (ADUs) & Granny Flats in Ontario
Ontario, California – known for its beautiful Spanish-style architecture, comfortable Mediterranean climate (think sunny days and mild winters!), and established neighborhoods like the historic downtown and picturesque areas around Diamond Bar Lake - is experiencing a surge in popularity as an ideal location to build Accessory Dwelling Units (ADUs) or ‘granny flats.’ Many homeowners are adding these secondary living spaces for rental income, aging parents, or simply extra space. But before you start construction, understanding the electrical requirements, specifically metering, is crucial – and that's where Just Electric Services comes in.
Separate Metering Requirements & Ontario’s Rules
California law mandates separate electrical meters for ADUs to ensure accurate billing and avoid disputes with your primary homeowner’s meter. This means if you’re building an ADU on a property in Ontario, it needs its own dedicated circuit and meter box. Just Electric Services is well-versed in the latest regulations set by Southern California Edison (SCE) and local ordinances regarding these installations. We understand the nuances of ensuring compliance, which often involves specific wire gauge requirements, breaker sizes, and panel configurations to handle the increased electrical load.
Why Choose Just Electric Services for Your Ontario Project?
With over 25 years of experience serving homeowners and business owners in the San Gabriel Valley – including Covina, Glendora, and Pasadena – Just Electric Services is your trusted local expert. Here’s why homeowners in Ontario choose us:
- **Local Expertise:** We understand the unique electrical challenges presented by Ontario's diverse home styles and neighborhoods.
- Experienced Team: Our team of licensed and insured electricians are dedicated to safe and efficient installations.
- Comprehensive Services: From new ADU electrical installs to existing repair needs, we cover all aspects.
- Fast Response Times: We’re committed to providing quick service - especially important if you need an Emergency electrician Ontario.
Electrical Repair & Maintenance in Ontario – When You Need Us Most
Building an ADU is exciting, but electrical systems can be complex. Don't wait until a problem arises! Regular maintenance and inspections are vital for safety and longevity. If you notice flickering lights, tripped breakers, or any unusual smells, it’s essential to act quickly. That’s why we offer prompt electrical repair Ontario services to address your immediate needs. You can easily find an electrician near me in the San Gabriel Valley by calling Just Electric Services today at (626) 625-9021.
Conclusion: Let Just Electric Services Handle Your ADU Electrical Needs
Don’t let electrical complexities delay your ADU project. Just Electric Services is here to provide reliable, compliant, and expertly executed installations. Contact us today at (626) 625-9021 for a free consultation – let's discuss how we can bring your vision to life!
Need an Electrician in Ontario?
Just Electric Services has over 25 years of experience serving Ontario and the San Gabriel Valley. Call us 24/7.
Call Us (626) 625-9021