Philadelphia, PA Landscaping Rules: Rainwater Harvesting (2026)

Philadelphia's zoning code treats rain barrels as a permitted yard encroachment rather than a banned accessory use. In residential districts, geothermal equipment, rainwater harvesting barrels, and odorless composting equipment can sit inside a required side yard if that yard is at least 5 feet wide, and inside a required rear yard, as long as the equipment stays at least 2 feet off any side or rear lot line. The same 2-foot setback from the lot line applies in Commercial, Industrial, and Special Purpose districts, where the barrels can encroach into required side and rear yard areas generally. No separate permit provision is listed for the barrels themselves in this section: the rule is purely a dimensional-standards carve-out inside § 14-701.