Line Extension Step-by-Step Process

Follow this step-by-step process for establishing a natural gas line extension.

The process of getting a new natural gas line can be challenging. To help simplify the process, we've prepared step-by-step guidelines that cover the important milestones involved in establishing new natural gas service.

Follow this five-step process to keep your service request moving smoothly and to ensure your new natural gas service is completed on time and to your satisfaction.

Step 1 - Application

Apply at least 10 to 12 weeks before you need the natural gas line and meter installed.

On-line Application


  • 1-800-427-2200 (Residential)
  • 1-800-427-2000 (Commercial)

Step 2 - Planning (15 - 20 Work Days)

A SoCalGas® planning representative will plan your project and contact you for site-specific details. Several topics will be covered, including:

  • Trenching
  • Meter location
  • Equipment and load requirements
  • Easement or right-of-way issues
  • Other construction-related items

Tariff compliance and allowance calculation concerns may be elevated at this point.

Step 3 - Contract (10 - 15 Work Days)

A Line Extension contract will be generated for your project based on your load needs and site specifications. Line Extension Contracts have several key time milestones that are important to remember.

0 Day Contract generate date - start clock
90 Days Contract voided if not signed or paid
180 Days Work must start within 90 days of contract signed date
365 Days Construction contract must be completed within one year of contract signed date

Meter Set Timeline

  • Ready to serve date – starts timeline clock
    • Main Projects – six months to set meters to earn allowance
    • Service Projects – 12 months to set meters to earn allowance

Contract Reconciliation Timeline

  • Ready-to-Serve Date – Starts Timeline Clock
    • Residential– 12 months
    • Non-residential – 36 months
    • Main refund – up to 10 years to receive series refunds

Step 4 - Construction (varies by project)

Once the contract is signed, payment will be posted (if required) and all other prerequisites will be satisfied (permitting, easements, etc.). Your project will be scheduled immediately or as requested. Be sure to have the service trenching ready at least one day prior to construction to avoid any delays or additional costs. When completed, the natural gas line will be ready for service.

Establish a billing account by phone at:

  • 1-800-427-2200 (Residential)
  • 1-800-427-2000 (Commercial)

To conclude this step, obtain a final houseline inspection by a city inspector.

Step 5 - Meter Installation (5 - 10 Work Days)

After a final house line inspection, call to schedule your meter installation and appliance turn-on at:

  • 1-800-427-2200 (Residential)
  • 1-800-427-2000 (Commercial)

Timely meter installation is critical for Line Extension Contract compliance.

Tariff Rules

See Tariff Rules 20 and 21 for comprehensive information regarding natural gas installation, allowances and reconciliation.