What's Required in Long Beach
- Building permit required for all secondary dwelling units.
- Must contain independent cooking, sleeping, and sanitation facilities.
- Requires professional architectural plans including foundation.
- Must meet lot coverage and setback rules for the zoning district.
- Owner-occupancy of the property is a mandatory requirement.
- Maximum size capped by state and local laws (usually 800-1200 sq ft).
How Much Does an ADU Permit Cost in Long Beach?
Budget $1,000–$4,000 for the Long Beach permit itself (valuation-based), issued by the Development Services Department — but treat that as the entry fee, not the total. ADUs are full dwelling units, so the permit stack usually includes building, electrical, plumbing, and mechanical trade permits, plus plan review. One local note: includes building, zoning, and utility capacity fees. Get an itemized fee estimate from the department before finalizing your budget; the spread between a simple conversion and a new detached build is wide.
ADU Size Limits and Zoning Rules in Long Beach
Before drawing plans, check the two gates that sink most ADU projects: size and zoning. Size ceilings vary by lot and ADU type (attached, detached, or conversion), so confirm your specific configuration. Other recorded conditions: owner-occupancy of the property is a mandatory requirement. Setbacks, height limits, and utility connections layer on top of those rules. The Development Services Department can confirm what your specific lot allows — worth doing before you pay for architectural drawings rather than after.
How to Get a ADU Permit in Long Beach
Step 1: Zoning Audit
Confirm an ADU is allowed on your lot via LBDS Planning.
Step 2: Design Documents
Prepare detailed site plans and architectural drawings.
Step 3: Submit Portal
Apply for a New Accessory Structure permit online via LBDS.
Step 4: Multi-Agency Review
Checked by Building, Zoning, and Fire departments.
Step 5: Inspections
Full series from footings to final occupancy sign-off.