Dublin, CA Outdoor Lighting: Dark Sky Rules (2026)

C establishes objective design standards that apply to all new single-family residential development in Dublin and to additions to existing single-family residences (for the added portion only). Subsection 7, Lighting, contains two requirements: fixtures must be mounted below the second story of a two-story home unless the Building Code requires otherwise, and every fixture must be designed to direct light downward and be shielded from off-site view. 010's stated purpose. C lets a project deviate from it only through the discretionary Site Development Review process, and only if the applicant demonstrates that the standard's intent, keeping stray light off neighboring property, is met through other means.

The Community Development Director resolves any question about how the standard applies to a proposed addition. The lighting standard was most recently reaffirmed in the July 2025 revision, Ordinance 5-25, that also updated the chapter's stairway rule, and traces back through Ordinance 3-22, Ordinance 1-22, Ordinance 17-20 and Ordinance 10-13.