Murrieta, CA Tree Protection: Heritage & Protected Trees (2026)

Section 16.42.040(F) of the Murrieta Municipal Code defines a 'Historically Significant Tree' as 'a living tree designated by resolution of the council as an historic tree because of an association with some event or person of historical significance to the community or because of special recognition due to size, condition, or aesthetic qualities.' Unlike the native-oak and mature-tree categories, which qualify automatically once a diameter threshold is met, this designation runs through the city council itself and requires an affirmative resolution naming the specific tree.

Once designated, Section 16.42.050(D) folds the tree into the chapter's protected tree list alongside mature native oaks, mature native trees, mature trees generally, and mitigation trees, so it receives the same baseline protection: Section 16.42.060 makes it unlawful to cut down, remove, relocate, or otherwise destroy it without first securing a tree removal permit under Section 16.42.070, and any pruning must follow International Society of Arboriculture guidelines. Section 16.42.030(A)'s exemption for existing trees on sub-acre single-family residential lots explicitly does not apply to trees protected under Section 16.42.050(D) and (E), meaning a historically significant tree keeps its protection even on a small residential parcel where an ordinary mature tree would be exempt.

A tree removal permit for a designated historic tree must still include a full arborist tree report under Section 16.42.080 and a replacement plan under Section 16.42.095 before the director will act on it.