Cambridge Zoning Definition of “Permeable Open Space”

Cambridge’s zoning code defines a “Permeable Open Space” as one consisting of “a surface material that may include vegetation; rocks, pebbles, wood chips and similar landscaping materials; or unit pavers. All other materials (for example, continuously poured asphalt or concrete) are not allowed except that any material may be used for pedestrian walkways not exceeding forty-eight (48) inches in width or half the width of the area in which they are located, whichever amount is less.”