The Smart Landlord's Guide to Splitting Utilities in a San Gabriel Valley Duplex — Costs, Methods & Local Contractors

To split utilities for a 2-unit house in the San Gabriel Valley, there are two main approaches. The affordable option is usually submetering, while full separation with utility company meters is significantly more expensive.

1. Most Affordable Way: Submetering (分表)

This method keeps one main utility account but installs private submeters for each unit to track usage.

How it works:

• One master meter remains with the utility company
• Separate submeters are installed for electricity, water, and possibly gas
• The owner allocates utility costs based on usage

Advantages:

• Lower cost
• Faster installation
• No need for full utility company approval in many cases
• Works well for duplex or rental setups

Typical costs in San Gabriel Valley:

• Electricity submeter: $300–$1,000
• Water submeter: $500–$1,500
• Gas submeter: similar range but more complex

2. Full Separation: Utility Company Meters (独立户头)

This involves installing completely separate meters and accounts for each unit.

Scope of work:

• New electrical service or panels
• Separate gas lines
• Separate water lines
• City permits and inspections
• Coordination with utility companies such as Southern California Edison and SoCalGas

Disadvantages:

• High cost: typically $5,000–$20,000+
• Longer timeline
• More complex permitting

3. Contractors in San Gabriel Valley

Electrical contractors:

• Smart Plug EV
  Phone: (323) 788-5849
• Harrison Electric & Solar
  Phone: (562) 695-8321
• Cruz Electric
  Phone: (626) 757-4950
• Yireh Electric Inc.
  Phone: (626) 222-5140
• Just Electric
  Phone: (626) 625-9021

Plumbing contractors (water and gas):

• I Love Sewers Rooter And Plumbing Sewer Specialties Inc
  Phone: (626) 764-2570
• Mr. Rooter Plumbing of South San Gabriel
  Phone: (323) 325-5725
• Kustom Plumbing
  Phone: (323) 312-8948
• California Utility Services
  Phone: (800) 400-1727

4. Practical Recommendation

For a typical duplex in the San Gabriel Valley:

• Electricity: install a subpanel and submeter
• Water: install inline submeters
• Gas: often shared or split by formula to reduce cost

This combination provides the best balance between cost and functionality for rental purposes.