Contra Costa County Municipal Code § 84-26.1402 Requirements

Twenty-five percent of the area described by the development plan submitted pursuant to Article 84-26.18 shall not be occupied by building, structures, or pavement, but shall be landscaped. Seventy-five percent of the twenty-five percent (open area) shall be planted and maintained with growing plants.

(Ord. 78-40 § 1).