Boston, MA Tree Protection: Heritage & Protected Trees (2026)

Boston recognizes the importance of heritage and specimen trees in the urban landscape, though it does not maintain a formal heritage tree registry like some other cities. Exceptionally large, old, or historically significant trees on public property are effectively protected through the Public Shade Tree Law (MGL c.87), which requires a public hearing for any removal of public shade trees. The Parks Department maintains an inventory of notable trees, including some dating to the 18th and 19th centuries in areas like Boston Common and the Public Garden. The BPDA development review process (Article 80) requires tree surveys for large projects and encourages preservation of specimen trees (typically defined as trees over 14 inches DBH). When specimen trees must be removed for development, enhanced replacement ratios are typically required — often 2:1 or 3:1 caliper inch replacement. The Boston Conservation Commission protects trees within wetland buffer zones. Private organizations like the Boston Natural Areas Network advocate for tree preservation across the city.