Yan v. City of Diamond Bar

CourtCalifornia Court of Appeal
DecidedMarch 11, 2026
DocketB339583
StatusPublished

This text of Yan v. City of Diamond Bar (Yan v. City of Diamond Bar) is published on Counsel Stack Legal Research, covering California Court of Appeal primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Yan v. City of Diamond Bar, (Cal. Ct. App. 2026).

Opinion

Filed 3/11/26 CERTIFIED FOR PARTIAL PUBLICATION*

IN THE COURT OF APPEAL OF THE STATE OF CALIFORNIA

SECOND APPELLATE DISTRICT

DIVISION FIVE

LULIN YAN, B339583

Plaintiff and Respondent, (Los Angeles County Super. Ct. No. v. 19STCV18770)

CITY OF DIAMOND BAR,

Defendant and Appellant.

APPEAL from a judgment of the Superior Court of Los Angeles County, Bryant Y. Yang, Judge. Affirmed.

Haith Bagnaschi and Christopher J. Bagnaschi for Defendant and Appellant.

* Pursuant to California Rules of Court, rules 8.1100 and 8.1110, this opinion is certified for publication as to all parts except Part II of the Discussion. BD&J and Martin J. Kanarek; Esner, Chang, Boyer & Murphy and Stuart B. Esner for Plaintiff Respondent.

****** When a tree branch falls onto a pedestrian on the sidewalk below, is the public entity that planted and maintained the tree liable for the resulting injuries? The jury in this case concluded it was, based on the jury’s subsidiary finding that the tree constituted a “dangerous condition” within the meaning of Government Code section 835.1 On appeal, the public entity does not challenge the sufficiency of the evidence supporting the verdict. Instead, it poses two evidentiary questions. First, does a trial court abuse its discretion in admitting evidence that other trees of the same species and in the same vicinity have experienced “branch falls” in the five years prior to the accident at issue to prove that the public entity was on notice of the dangerous condition? We hold the admission of such evidence for this purpose was within its discretion. Second, does a trial court abuse its discretion in admitting testimony of a neighbor who reported the prior branch falls, even when the neighbor was not himself an arborist and did not personally see the branches fall? In the unpublished portion of this opinion, we hold that this was also not error. We accordingly affirm the judgment for the pedestrian.

1 All further statutory references are to the Government Code unless otherwise indicated.

2 FACTS AND PROCEDURAL BACKGROUND I. Facts A. The accident In the early evening of July 24, 2018, Lulin Yan (plaintiff) was walking down the sidewalk lining Montefino Avenue in the City of Diamond Bar, California (the City). A tree limb with an approximately eight-inch diameter detached from the “upper canopy” of one of the Bradford pear trees on that street and landed on and snapped off two lower branches of the tree, which caused all three to crash down on top of plaintiff, knocking him to the ground. He was transported by ambulance to the hospital, where he stayed for three days. Plaintiff sustained a compression fracture to his spine. B. The City’s oversight of its trees The City owns the Bradford pear trees that line its streets, including along Montefino Avenue, and is responsible for their maintenance. As the City is home to nearly 14,000 trees of many species, it has contracted a third-party arborist to care for its inventory of trees. The contract obligates the arborist to trim the City’s trees every five years based on their location on a geographic “grid” and irrespective of species.2 The arborist also handles any tree-specific requests the City makes, and maintains a database of those work orders. The City’s oversight of its trees is otherwise solely reactionary—that is, it responds to resident complaints by alerting the arborist to pick up fallen tree debris. The City’s complaint intake system gathers little information on the reason for debris pickup, the City retains “very few” records of the complaints it receives, and the few it does keep are “not . . .

2 However, the tree that collapsed onto plaintiff had not been trimmed from 2005 to 2015.

3 organized.” Due to this paucity of information, the City has not tracked “patterns” of tree failures. C. The City’s awareness of prior branch falls from Bradford pear trees Robert Ludowitz, a City resident and the president of the homeowners’ association overseeing the neighborhood where the tree limbs fell on plaintiff, had reported several previous incidents of fallen limbs and branches of Bradford pear trees in that neighborhood—all in writing, either by email or by submitting a complaint to the City’s online portal. Due to Ludowitz’s complaints, the City’s records documented the following information prior to plaintiff’s accident: -- The same tree that partially collapsed on plaintiff had experienced two prior branch failures—one five years prior to plaintiff’s accident and another ten months prior.3 -- In the five years prior to plaintiff’s accident, other Bradford pear trees in the same neighborhood experienced branch failures nine separate times.4 Those incidents included (1) a limb the size of a truck bed falling from a tree canopy in April 2016, (2) a branch falling into an area where children load and unload from school buses in April 2017, and (3) branches falling from two different trees along Montefino Avenue just two weeks before plaintiff’s accident. On each occasion, the City

3 That tree also dropped another branch less than three months after plaintiff’s accident.

4 This tally of nine prior branch failures does not include two incidents of fallen branches described at trial that had distinct causes—namely, when a utility worker purposefully pruned the branches of a Bradford pear tree away from a street light and when gusty winds knocked a branch down.

4 directed the arborist to remove the fallen limbs but otherwise took no action to investigate the cause of these multiple limb failures. In the face of the City’s failure to take further action, Ludowitz expressed his displeasure to the City, as he “believe[d] that the City [was] maintain[ing] the trees along Montefino [in]consistently.” When Ludowitz learned of plaintiff’s injuries, he informed the City that what he feared—a tree limb falling on a person—had “‘finally happened.’” II. Procedural Background In May 2019, plaintiff sued the City for maintaining public property in a dangerous condition.5 The dangerous condition claim proceeded to a multi-day jury trial in March 2024. In support of his claim, plaintiff adduced the following evidence: -- Expert arborist opinion. Plaintiff called a professional arborist, who opined that (1) Bradford pear trees are “ornamental” trees that became popular in residential developments in the 1980s, and (2) the species is no longer

5 Plaintiff had also sued the City’s arborist contractor (for premises liability and negligence), the County of Los Angeles (for maintaining public property in a dangerous condition), and the homeowners’ association (for premises liability and negligence). Plaintiff’s wife, child, and grandchild were also initially named as plaintiffs, asserting claims for negligence against the homeowners’ association and for negligent infliction of emotional distress against all defendants. The defendants asserted various cross-claims against one another. Following the trial court’s rulings on dispositive motions and voluntary requests for dismissal, the only live dispute by the time of trial was plaintiff’s dangerous condition claim against the City.

5 planted due to its “undesirable growth characteristics”—namely, that it grows several “scaffold branches” from the same elevation on its trunk, which results in “very weak connection[s]” between the trunk and the scaffold branches, and those connections “tend[] to break . . . as the tree grows larger.” -- City’s prior “risk assessment.” Plaintiff introduced a “risk assessment” the City commissioned from its arborist in 2008, which noted that Bradford pear trees, as a “species,” have a “tendency to split without warning,” although the assessment noted that this risk was “not necessarily considered a hazard” as long as the City “has a well documented maintenance history” of the tree.

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Yan v. City of Diamond Bar, Counsel Stack Legal Research, https://law.counselstack.com/opinion/yan-v-city-of-diamond-bar-calctapp-2026.