Approval Timelines

ADU / Garage Conversion Permit Approval Timeline in Los Angeles

How long does ADU permitting take in Los Angeles? LADBS review timelines for garage conversions.

Los Angeles ADU Permit Approval Timeline Overview

ADU permit approval timelines in Los Angeles have improved dramatically in recent years due to state legislation and new LADBS programs. California law requires LADBS to complete ministerial ADU permit review within statutory timeframes, providing more predictability for homeowners planning garage conversions and ADU projects.

Standard Plan Program Timeline (Fastest Option)

ADU projects using pre-approved designs from the LADBS Standard Plan Program can receive permit approval in as few as 2–3 weeks from submission of a complete application. Because the design has already been reviewed for building code compliance, LADBS only needs to verify site-specific details.

A real-world example: a Silver Lake property owner using a 600 sq ft pre-approved design submitted plans in early January 2025 and received permit approval in approximately 21 days. Using the Standard Plan Program is the fastest route to an approved Los Angeles ADU permit.

Custom Plan Timeline

ADU projects using custom architectural plans require a full plan check review. Under state law (AB 2221), LADBS must complete the application completeness check within approximately 30 days and issue approval or denial within approximately 60 days of receiving a complete application. In practice, total custom plan review timelines range from 4–10 weeks depending on project complexity and the number of correction cycles.

Overall Project Timeline from Design to Move-In

The complete timeline for a Los Angeles garage conversion ADU — from design through permit approval, construction, inspections, and Certificate of Occupancy — typically ranges from 6 to 12 months. Using the Standard Plan Program and working with an experienced ADU contractor familiar with LADBS requirements can compress this timeline significantly.

Factors That Affect ADU Permit Approval Time

• Whether a Standard Plan or custom plan is used
• Completeness and accuracy of the first submitted application

• Number of LADBS correction cycles required
• Whether additional departmental clearances (Planning, Fire, Sanitation) are required
• Current LADBS processing volume
• Whether the project involves nonconforming setbacks requiring additional review

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