New Castle County, DE Tree Protection: Heritage & Protected Trees (2026)

Unlike cities such as Atlanta or Palo Alto, New Castle County does not maintain a formal heritage tree or specimen tree designation ordinance that applies to private property. The county's UDC requires developers to identify specimen trees (typically 24+ inch DBH) as part of subdivision and site plan tree preservation plans and preserve a percentage, but this is a development-stage regulation, not a standing designation on individual lots. The Delaware Forest Service operates the Delaware Big Tree Program, which catalogs champion trees (largest specimens by species) statewide; listing on the program does not grant legal protection but provides recognition and encourages voluntary conservation. DNREC natural areas, state parks, and the First State National Historical Park (Brandywine and Woodlawn sections) provide strong protection for mature trees within their boundaries. Brandywine Creek State Park, White Clay Creek State Park, and Mt. Cuba Center (private but conservation-focused) contain significant heritage-scale trees. For private property owners, protection depends on whether the tree falls within a conservation easement (DNREC, Delaware Wild Lands, or similar), a subdivision open space, or an HOA-designated preservation area. Damage to trees on neighboring property is a civil matter under Delaware common law (conversion, trespass) and can result in treble damages under 25 Del.C. §1401.