Los Angeles County Public Works

Los Angeles County Public Works maintains county roads, generally in unincorporated areas, and authorizes work in that right-of-way through its permit process.

Last reviewed: June 24, 2026

Level: County  ·  Applies to: county-maintained roads in Los Angeles County, generally in unincorporated areas outside city limits.

What This Agency Governs

  • Work in county-maintained road right-of-way, generally in unincorporated Los Angeles County.
  • Authorization for that work, generally through a county encroachment or road permit.
  • County standard plans and permit conditions that apply on top of statewide standards.

Standards That Apply

  • The California MUTCD governs traffic control devices and temporary traffic control.
  • Los Angeles County standard plans and permit conditions add the county's specific requirements.
  • Cal/OSHA and ADA requirements also apply.

Permits & Authorization

County encroachment / road permit

Work in a county-maintained road generally requires a permit from Los Angeles County Public Works. The permit types, application process, hours, notice, fees, and conditions are set by the county and must be confirmed on the official LA County Public Works site — they are not stated here.

How to Verify Requirements

  • Confirm that the road is county-maintained (generally unincorporated area) rather than a city street or state highway.
  • Confirm current permit types, application requirements, and conditions on the LA County Public Works site.
  • Confirm device and setup standards against the current California MUTCD and county standard plans.

Verify Before Relying On Specifics

Official Sources

Related Pages