Commercial and multi-family exterior lighting requirements (CPTED)

An electrical permit application must be submitted and approved for any proposed changes to existing or new exterior lighting. The submitted plans must demonstrate compliance with SeaTac Municipal Code (SMC) Chapter 17, Crime Prevention Through Environmental Design (CPTED).

Below are the minimum required submittal items. Failure to submit all required items (in a legible form) will delay processing of your application.

1. Lighting plan. A lighting plan showing all proposed exterior lighting fixtures, and their relationship to buildings, landscaping, and parking areas and including the following information:
   • Isolux or point-by-point photometric calculations at intervals of not more than ten feet (10'), at ground level
     • The area covered by the photometric shall extend twenty feet (20') beyond the edge of the subject property, to show the effect of the lighting on adjacent properties
     • The photometric shall include a summary data table, showing:
       • Maximum light level ratios;
         • Minimum light level ratios;
         • Maximum to minimum light level ratios, and;
         • Average to minimum light level ratios
   • Specifications for all proposed lighting fixtures, including designation as IESNA "cut-off" fixtures, Color Rendering Index (CRI) of all lamps (bulbs), and other descriptive information on the fixtures
2. Luminaire cut sheets. Manufacturer's "cut sheets" showing the height and type of lighting fixtures.