All building permit applications are referred to the City Engineer for checking of property descriptions and assignment or approval of street address numbers. Plan Approval - General, CP13-2046.Plan Approval or Deemed-To-Be-Approved Plan Approval - Alcohol and Entertainment, CP13-2035. Use the Online Service Locator from the LA County Dept of Public Works to find out who services your area. For pre-application counseling on permits. Counseling may be with LA County Planning and other County departments. The instructions on this page apply to customers who have completed a plan check and want to proceed to permit issuance. It takes 2-4 weeks after a home visit for a decision (usually approval as denials are quicker to process) in LA County. Whole process may take 4-5 months. LAWA will respond to your request within 3 weeks with a Concept Letter, which will formally approve or deny your project and instruct you how to continue.