Required Documents

Solar Panel Permit Required Documents in Los Angeles

What LADBS requires for a Los Angeles solar panel permit application — plans, specs, and more.

Los Angeles Solar Permit Documentation Overview

A complete Los Angeles solar permit application requires documentation covering the system design, structural attachment, electrical configuration, and fire safety compliance. Submitting complete documentation at the first attempt minimizes correction cycles and speeds up the LADBS review process.

Site and Roof Plans

• Roof plan showing the complete module layout and anchor point locations
• Roof rafter layout indicated on the roof plan (required by LADBS for structural verification)
• Required fire access setback dimensions from roof ridges, hips, and edges
• Location of all roof penetrations, skylights, and HVAC equipment
• Location of the main electrical panel and proposed solar disconnect and meter point
• Site plan showing the property and structure overall

Electrical Plans and One-Line Diagram

• Single-line (one-line) electrical diagram of the complete solar system from PV array to utility meter
• Panel schedule showing the solar interconnection breaker and available capacity
• Grounding and bonding plan
• Rapid Shutdown System (RSS) configuration diagram
• Disconnect and labeling plan
• String configuration diagram showing number and arrangement of modules per string

Structural Documentation

• Manufacturer-completed structural worksheets or web-based calculator results for roof attachment

hardware

• Roof rafter spacing and size confirmation (from roof plan or field measurement)
• Mounting system manufacturer installation specifications
• Structural engineering calculations if the roof framing requires additional analysis

Equipment Specifications

• PV module specifications: manufacturer, model number, rated power (W), Voc, Isc, Vmpp, Impp

• Inverter specifications: manufacturer, model, rated output, efficiency, anti-islanding certification
• Mounting hardware specifications and installation instructions
• Battery ESS specifications if included (submitted separately to Fire Department)

Express Permit Documentation (Qualifying Small Systems)

For residential solar systems meeting LADBS express permit eligibility criteria (crystalline/multi-crystalline modules, 4 or fewer strings), the required documentation may be simplified. A roof plan showing module and anchor layout with rafter layout and completed manufacturer structural worksheets may be sufficient for express permit submission through LADBS PermitLA.

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