Folsom, CA Landscaping Rules: Tree Trimming (2026)
Key Facts
- Exempt
- Under 25% canopy routine
- Protected
- Oaks + heritage trees
- Permit
- >25% or topping
- Utility
- SMUD GO 95 clearance
- Nesting
- Feb-Aug survey req.
Summary
Folsom has a strong tree preservation ordinance protecting native and heritage trees. Routine maintenance pruning (under 25% of canopy) is generally allowed without permit, but major trimming, topping, or pruning of protected trees requires an arborist report and Community Development permit. SMUD governs utility-line clearance trimming.
4291. (a) A person who owns, leases, controls, operates, or maintains a building or structure in the state responsibility area shall at all times do all of the following: (1) (A) Maintain defensible space of 100 feet from each side and from the front and rear of the structure, but not beyond the property line, except as provided in subparagraph (B). The amount of fuel modification necessary shall consider the flammability of the structure as affected by building material, building standards, location, and type of vegetation. Fuels shall be maintained and spaced in a condition so that a wildfire would be unlikely to ignite the structure. This subparagraph does not apply to single specimens of trees or other vegetation that are well-pruned and maintained so as to effectively manage fuels and
Full Breakdown
Folsom Municipal Code protects native oaks (Quercus species), heritage trees, and trees in required landscape areas. Permissible without permit: removal of dead wood, crossing branches, and minor shaping not exceeding 25% of live canopy in any 12-month period. Requires permit: removal of more than 25% of canopy, topping or heading cuts on oaks (which causes decline), pruning within the tree protection zone (dripline) during construction, and any work on a designated heritage tree. Permit applications require an ISA-certified arborist report justifying the work and specifying pruning standards (ANSI A300).
Work on privately owned trees overhanging a neighbor's property is limited to the portion on the neighbor's side and must not damage the tree (Booska v. Patel). SMUD (Sacramento Municipal Utility District) handles mandatory clearance pruning under utility lines and may trim without owner consent to maintain 10-foot minimum clearance under GO 95. Tree trimming during bird nesting season (Feb 1 – Aug 31) requires nest survey to comply with Migratory Bird Treaty Act and CA Fish & Game Code §3503.
Violations & Fines
Unpermitted major pruning of protected trees: fines $500-$5,000 depending on tree value (appraised via ISA Trunk Formula Method). Topping of oaks: additional mitigation replanting required. Bird nest destruction: state and federal wildlife violations possible.
Frequently Asked Questions
Can I top my oak tree that's getting too big?
Do I need a permit to trim my Folsom street tree branches?
Sources & Official References
Other rules in Folsom
California rules heatmap·Compare Folsom to another location·View the California landscaping rules overview
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How other cities in Sacramento County handle tree trimming.