Agoura Hills City Council considers protecting California Sycamore and Black Walnut trees

Agoura Hills City Council is taking significant steps to enhance local environmental protections by considering the addition of two native tree species to its protected list. During the meeting on July 9, 2025, city staff presented findings from a study conducted by consultant Dudek, which evaluated various tree species native to the area. The Southern California Black Walnut and California Sycamore emerged as key candidates for protection due to their prevalence in natural settings and their vulnerability to development.

The council learned that both species not only contribute to the local ecosystem but also possess fire-resistant properties, making them suitable for high fire risk areas. This aligns with the city’s ongoing efforts to promote fire-wise landscaping, as endorsed by scientific literature and the local fire department.

However, the proposal comes with considerations. Protecting these additional species would require increased staff resources for drafting ordinances and managing permits. Furthermore, the council discussed the implications of off-site mitigation, as both species have medium to high water needs, which could complicate replanting efforts.

Other tree species, such as the Madrone and California Bay Laurel, were deemed less critical for protection due to their limited presence in urban landscapes and low risk from development. Similarly, species like the Fremont Cottonwood and Pacific Willow, found primarily in protected riparian areas, were not recommended for inclusion in the ordinance.

The council is now poised to evaluate community interest in these proposed protections, particularly for the California Sycamore and Southern California Black Walnut. If public opinion supports the initiative, the city may implement protections or incentives for these vital tree species, furthering Agoura Hills' commitment to environmental stewardship.