*527 Opinion
This appeal is taken from an order sustaining a demurrer without leave to amend. At issue is defendant’s liability for hosting a party where plaintiffs were attacked by unidentified individuals. We conclude: (1) because defendant did not owe plaintiffs a duty of care, plaintiffs’ negligence claims fail; (2) because plaintiffs’ nuisance claim merely restates their negligence claims, it also fails; and (3) amendment cannot cure the defects in plaintiffs’ complaint. We therefore affirm.
FACTUAL AND PROCEDURAL BACKGROUND
The parties to this action are Cody Melton, Mike Richard Kelly, and Jesse A. Maldonado (collectively, plaintiffs), and Clive Boustred (defendant).
On May 5, 2007, defendant held a party at his residence featuring live music and alcoholic beverages. Defendant advertised the party using an open invitatiоn on the social networking site, MySpace.com. Upon arriving at the party, plaintiffs were attacked, beaten, and stabbed by a group of unknown individuals. They sustained serious injuries.
Proceedings in the Trial Court
Plaintiffs brought suit against defendant, asserting claims for negligence and premises liability. Defendant demurred to the original complaint. The court sustained the demurrer with leave to amend.
In March 2008, plaintiffs filed their first amended complaint, which included further factual allegations; it also added a cause of action for nuisance. Plaintiffs’ amended complaint thus asserted four causes of action: (1) negligence; (2) premises liability; (3) public nuisance; and (4) battery, asserted against certain Doe defendants only.
Defendant again demurred. The trial court sustained his demurrer, this time without leave to аmend.
Appeal
Plaintiffs brought this appeal from the order sustaining defendant’s demurrer. 1 On appeal, plaintiffs contend that the trial court erred in sustaining *528 defendant’s demurrer. First, concerning their claims for negligence and premises liability, plaintiffs maintain that defendant owed them a legal duty to protect them against the third party criminal assault, because the risk of injury was foreseeable and the burdens of protecting against it were slight. Plaintiffs also contend that they have stated a viable claim for public nuisance.
DISCUSSION
As a framework for assessing plaintiffs’ contentions, we begin by summarizing the general legal principles that govern demurrers.
I. Legal Principles
“A general demurrer searches the complaint for all defects going to the existence of a cause of action and places at issue the legal merits of the action on assumed facts.”
(Carman v. Alvord
(1982)
On appeal from the sustention of a demurrer, “we independently review the complaint to determine whether the facts alleged state a cause of action under any possible legal theory.”
(Berger v. California Ins. Guarantee Assn.
(2005)
“In reviewing the sufficiency of a complaint against a general demurrer, we are guided by long-settled rules. ‘We treat the demurrer as admitting all material facts properly pleaded, but not contentions, deductions or conclusions of fact or law.’ ”
(Blank v. Kirwan
(1985)
“If the court sustained the demurrer without leave to amend, as here, we must decide whether there is a reasonable possibility the plaintiff could cure the defect with an amendment.”
(Schifando v. City of Los Angeles, supra,
II. Analysis
With those principles in mind, we consider whether plaintiffs’ first amended complaint states causes of action for negligence or for public nuisance. As to each type of claim, we begin by summarizing relevant principles of the governing substantive law. We then apply those principles to the case at hand.
A. Negligence Claims
1. Substantive Law
The elements of a cause of action for negligence are duty, breach, causation, and damages.
(Sharon P. v. Arman, Ltd.
(1999)
a. Duty
Duty “is an essential element” of the tort of negligence.
(Potter
v.
Firestone Tire & Rubber Co.
(1993)
As provided by statute: “Everyone is responsible, not only for the result of his or her willful acts, but also for an injury occasioned to another by his or her want of ordinary care or skill in the management of his or her property or person, except so far as the latter has, willfully or by want of ordinary care, brought the injury upon himself or herself.” (Civ. Code, § 1714, subd. (a).) The California Supreme Court expounded the “fundamental principle enunciated by” this provision more than four decades ago, in the seminal case of
Rowland v. Christian
(1968)
These same concepts apply to premises liability claims. Generally speaking, “a landowner has a duty to act reasonably in the management of property ‘in view of the probability of injury to others.’ ”
(Garcia v. Paramount Citrus Assn., Inc.
(2008)
“Foreseeability and the extent of the burden to the defendant are ordinarily the crucial considerations, but in a given case one or more of the other
Rowland
factors may be determinative of the duty analysis.”
*531
(Castaneda
v.
Olsher
(2007)
“The existence of a duty is a question of law for the court.”
(Sharon P.
v.
Arman, Ltd., supra,
b. Liability for Third Party Conduct
When analyzing duty in the context of third party acts, courts distinguish between “misfeasance” and “nonfeasance.”
(Lugtu
v.
California Highway Patrol
(2001)
A
legal duty may arise from affirmative acts “where the defendant, through his or her own action (misfeasance) has made the plaintiff’s position worse and has created a foreseeable risk of harm from the third person. In such cases the question of duty is governed by the standards of ordinary care.”
(Pamela L. v. Farmer
(1980)
By contrast, nonfeasance generally does not give rise to a legal duty. Thе underlying premise is that “a person should not be liable for ‘nonfeasance’ in failing to act as a ‘good Samaritan.’ ”
(Pamela L. v. Farmer, supra,
Even in the case of nonfeasance, there are “recognized exceptions to the general no-duty-to-protect rule,” one of which is the special relationship doctrine.
(Delgado, supra,
Where there is a legal basis for imposing a duty—as in cases of misfeasance or when a special relationship exists—the court considers the foreseeability of risk from the third party conduct. Generally, “a duty to take affirmative action to control the wrongful acts of a third party will be imposed only where such conduct can be reasonably anticipated.”
(Ann M. v. Pacific Plaza Shopping Center
(1993)
Foreseeability is balanced against “the burden of the duty to be imposed. Where the burden of prevention is great, a high degree of foreseeability is usually required; whereas where there are strong public policy reasons for preventing the harm, or the harm can be prevented by simple means, a lesser degree of foreseeability may be required.”
(Rinehart, supra,
“In each case, however, the existence and scope of a property owner’s duty to protect against third party crime is a question of law for the court to resolve.”
(Castaneda, supra,
2. Application
In their amended complaint, plaintiffs allege that defendant’s use of MySpace to promote his party “constituted an unlimited, unrestricted and widely broadcast party invitation to the general public to converge at defendants [sic] property.” They further allege that the party “was knоwn to include music and alcohol consumption.” Plaintiffs assert that defendant “knew, and in the exercise of reasonable care should have known, that to do so would expose plaintiffs and other guests to an unreasonable risk of bodily harm arising from: (1) an unregulated publicly advertised event involving the consumption of alcohol, dancing, live music, and DJ services; (2) without restriction on the number or identity of persons attending; and (3) with no attempt to control admission or provide security or protection for attendees.” They further assert that defendant “knew, and should have known, that such actions were highly likely and substantially certain to attract gang members to defendants’ property, to attract violent youths to defendants’ property, to *533 create a dangerous condition on defendants’ property, and to result in injuries to persons attending the party and others.”
In their opening brief on appeal, plaintiffs argue that defendant owed them a duty of care “not to actively create an out-of-control and dangerous public MySpace party” at his residence. Plaintiffs characterize defendant’s unrestricted MySpace invitation as “active conduct of a property owner” that can give rise to tort liability for the third party criminal assault against them. In response, defendant cites the general rule that there is no duty to act to protect others from the actions of third parties. He also maintains that the assault was minimally foreseeable, while the burden of protecting against it was great.
We сonclude that no legal duty arose under the circumstances present here, since this case involves neither misfeasance nor a special relationship. That conclusion is bolstered by assessing the foreseeability of the risk, the burden of preventing the harm, and the other Rowland factors.
a. No legal duty exists in this case, because defendant did not create the peril that injured plaintiffs.
As discussed above, as a general rule, “an actor is under no duty to control the conduct of third parties.”
(Weirum, supra,
Under thе facts alleged here, we conclude defendant did not engage in any active conduct that increased the risk of harm to plaintiffs. As a starting point, we accept as tme plaintiffs’ factual allegation that defendant issued “an unlimited, unrestricted and widely broadcast” invitation to a party at his home, which was “to include music and alcohol consumption.” As we now explain, however, defendant’s conduct in issuing that invitation did not create the peril that harmed plaintiffs.
We find guidance on this point in two cases involving negligent (not criminal) third party conduct:
Weirum, supra,
In
Sakiyama,
two teenagers were killed and another two were injured in a single-car crash, after leaving an all-night rave party hosted at the defendant’s
*534
premises.
(Sakiyama, supra,
In
Weirum,
the defendant, a “rock radio station with an extensive teenage audience conducted a contest which rewarded the first contestant to locate a peripatetic disc jockеy. Two minors driving in separate automobiles attempted to follow the disc jockey’s automobile to its next stop. In the course of their pursuit, one of the minors negligently forced a car off the highway, killing its sole occupant.”
(Weirum, supra,
Factually, the crux of the difference between
Weirum
and
Sakiyama
is this: In
Weirum,
“hazardous driving by teenagers was a necessary component” of the conduct at issue, whereas in
Sakiyama,
“the rave party was simply a party attended by teenagers.”
(Sakiyama, supra,
*535
In that regard, our case is more like
Sakiyama
than
Weirum.
The violence that harmed plaintiffs here was not “a necessary component” of defendant’s MySpace party.
(Sakiyama, supra,
Since defendant did not engage in active conduct that increased the risk of harm to plaintiffs, there is no basis for imposing a legal duty on him to prevent the harm inflicted by unknown third persons.
(Delgado, supra, 36
Cal.4th at p. 235 [no liability for criminal third party conduct];
Sakiyama, supra,
b. There is no special relationship giving rise to a legal duty.
As noted above, a special relationship may give rise to a legal duty to protect the plaintiff from third parties, even in the absence of misfeasance by the defendant. “The special relationship situations generally involve some kind of dependency or reliance.”
(Olson
v.
Children’s Home Society
(1988)
*536 In this case, plaintiffs have not alleged facts supporting the existence of any special relationship recognized by law that would trigger a legal duty on defendant’s part to protect them. The complaint alleges that plaintiffs came to defendant’s house to attend a party. Those facts do not warrant application of the special relationship doctrine, and plaintiffs do not argue оtherwise.
Here, given defendant’s nonfeasance and the absence of a special relationship, defendant had no legal duty to protect plaintiffs from the third party criminal conduct that harmed them. That determination is strengthened by assessing the foreseeability of the risk, the burden of preventing the harm, and the other Rowland factors, a process that we now undertake.
c. The criminal attack was not reasonably foreseeable.
As explained above, “in the case of
criminal
conduct by a third party, an extraordinarily high degree of foreseeability is required to impose a duty on the landowner ...” for the resulting harm. (Garcia,
supra,
In determining whether this heightened standard of foreseeability has been established, the defendant’s knowledge is critical. (See Rest.2d Torts, § 314A, com. e, p. 120 [“defendant is not liable where he neither knows nor should know of the unreasonable risk . . .”].) When the court engages “in any analysis of foreseeability, the emрhasis must be on the specific, rather than more general, facts of which a defendant was or should have been aware.”
(Pamela W. v. Millsom
(1994)
In this case, the complaint asserts “that defendant knew or should have known” that his actions in hosting a party with music and alcohol, in promoting it on the Internet, and in failing to control admission to the party “would expose plaintiffs and other guests to an unreasonable risk of bodily harm” and would “attract gang members to defendants’ property, . . . attract violent youths to defendants’ property, . . . create a dangerous condition on defendants’ property, and . . . result in injuries to persons attending the party and others.” Because those assertions are wholly conclusory, however, we need not and do not treat them as true.
(Blank v. Kirwan, supra,
Stripped of its bare contentions, the complaint contains no allegations that defendant was aware that his invitation would result in the criminal assault on plaintiffs. (Cf.
Martinez v. Bank of America
(2000)
*537
The lack of knowledge on defendant’s part distinguishes this case from one on which plaintiffs heavily rely,
Hansen
v.
Richey
(1965)
For similar reasons, this case is also distinguishable from
Pamela L. v. Farmer, supra,
Defendant’s lack of knowledge likewise sets this case apart from
Frances T. v. Village Green Owners Assn.
(1986)
In analyzing the defendant’s knowledge, a related consideration is the existence of prior similar incidents. In this case, there is no allegation that defendant had any “particularized information concerning ‘prior similar incidents of violent crime on the lаndowner’s premises.’ ”
(Pamela W. v. Millsom, supra, 25
Cal.App.4th at p. 959; see also, e.g.,
Rinehart, supra,
In their reply brief, plaintiffs rely on “common sense” as support for their assertion that defendant should have known that his actions created a peril. They argue that “a homeowner of common sense would know that a public invitation posted on MySpace to a free party offering music and alcohol was substantially certain to result in an injury to someone.” More specifically, plaintiffs say, “anyone with common sense would know” that such conduct “would bring [plaintiffs] into contact with persons who[] were peculiarly likely to commit violent crime.” According to plaintiffs: “Common sense is sufficient to inform against the act, and if common sense is not a measure of reasonableness, the meaning is hard to imagine.”
Common sense is not the standard for determining duty. (Cf.
Saelzler v. Advanced Group 400
(2001)
An injury is reasonably foreseeable only if its occurrence is likely enough in modem daily life that reasonable people would guard against it.
(Bigbee v. Pacific Tel. & Tel. Co.
(1983)
*539 On the facts alleged here, we conclude that the criminal attack on plaintiffs was not reasonably foreseeable. Moreover, even if we assume that it was, the burden of preventing the particular criminal conduct outweighs the foreseeable risk of harm, as we now explain.
d. The security measures proposed by plaintiffs are unduly burdensome.
Imposing “a duty of care to protect against criminal assaults requires ‘balancing thе foreseeability of the harm against the burden of the duty to be imposed.’ ”
(Wiener, supra,
32 Cal.4th at pp. 1146-1147, quoting
Ann M., supra,
In this case, plaintiffs posit two types of precautionary measures: providing security at the party and limiting the invitees.
Concerning security, the complaint alleges that defendant “hаd a duty to take affirmative action to control, guard against, and limit the wrongful acts of third parties which threatened the physical safety of plaintiffs and other guests” and that a “reasonable person in defendants’ position would have . . . taken the proper steps to ensure adequate security in order to prevent the occurrences of violence and to protect his guests’ physical safety.”
To the extent that plaintiffs are urging the employment of security guards, the facts of this case do not support the imposition of a duty to do so. The California Supreme Court has repeatedly found “the burden of hiring security guards” to be “extremely high, so high in fact, that the requisite foreseeability to trigger the burden could rarely, if ever, be proven without prior similar incidents.”
(Wiener, supra,
The other security measure proposed by plaintiffs is restriction of the guest list. According to the complaint, the MySpace.com Web site has tools that permit users to limit invitations to “Mends” only, which defendant did not
*540
use. Plaintiffs repeat that refrain in their opening brief, saying: “Defendant could have limited the scope and audience of the party invitation.” (See
Pamela L. v. Farmer, supra,
We disagree with plaintiffs’ assessment of the burden of limiting the guest list. In our view, the proposed measure is objectionable on several grounds, including vagueness, lack of efficacy, and burdensomeness in terms of social cost. (See
Wiener, supra,
First, plaintiffs’ proposal is vague. Plaintiffs vacillate on whether the list should be limited to individuals personally known to the host or whether it also could include “acquaintances, or even friends of acquaintances.” Moreover, as defendant points out, any attempt to define any of those categories will prove slippery.
Second, there is no basis for finding that the proposed security measure would be effective in preventing the harm. Since the assailants who attacked plaintiffs were never identified or apprehended, there is no way to know whether they were among defendant’s friends, acquaintances, or friends of acquaintances, all of whom presumably could be invited under plaintiffs’ proposal. (Cf.
Castaneda, supra,
Third, the proffered guest list limitation is socially burdensome. In assessing a proposed security measure, we consider its impact both on the defendant and on society at large.
(Castaneda, supra,
*541
“Weighed against this significant burden is the low foreseeability of the type of conduct that directly caused” plaintiffs’ injuries.
(Garcia, supra,
e. Other considerations do not support a finding of duty.
Foreseeability and the burden to the defendant “have evolved to become the primary factors considered in every case,” but one or more of the “remaining
Rowland
factors . . . may apply in any given case to alter the balance in light of policy considerations.”
(Vasquez v. Residential Investments, Inc., supra,
118 Cal.App.4th at pp. 280-281, fn. 5; accord,
Castaneda, supra,
3. Conclusion
To sum up, no legal duty arose under the facts alleged here. First, contrary to plaintiffs’ contentions, this case does not involve defendant’s active conduct (misfeasance). Second, no special relationship has been alleged here. Third, the criminal attack on plaintiffs was not reasonably foreseeable. Fourth, the burden of preventing the harm outweighs the foreseeable risk. Finally, the other Rowland factors do not support a finding of duty.
In the absence of a legal duty, no negligence claim can be stated against defendant. (Wiener, supra, 32 Cal.4th at p. 1145.) The trial court thus acted properly in sustaining defendant’s demurrer to the first and second causes of action of plaintiffs’ amended complaint, for negligence and premises liability.
We now turn to plaintiffs’ sole remaining claim against defendant, their third cause of action, which asserts public nuisance.
*542 B. Public Nuisance Claim
1. Substantive Law
A nuisance is statutorily defined as anything “injurious to health” or “indecent or offensive to the senses, or an obstruction to the free use of property” that interferes “with the comfortable enjoyment of life or property . . . .” (Civ. Code, § 3479.) “A public nuisance is one which affects at the same time an entire community or neighborhood, or any considerable number of persons, although the extent of the annoyance or damage inflicted upon individuals may be unequal.” (Civ. Code, § 3480.) As the California Supreme Court has explained, “public nuisances are offenses against, or interferences with, the exercise of
rights common to the
public.”
(People ex rel. Gallo v. Acuna
(1997)
The elements “of a cause of action for public nuisance include the existence of a duty and causation.”
(In re Firearm Cases
(2005)
Given “the broad definition of nuisance,” the independent viability of a nuisance cause of action “depends on the facts of each case.”
(El Escorial. Owners’ Assn. v. DEC Plastering, Inc.
(2007)
2. Application
In this case, plaintiffs’ amended complaint alleges no additional facts in support of the nuisance claim. That claim thus relies entirely on the facts asserted in plaintiffs’ causes of action for negligence and premises liability. *543 Plaintiffs incorporate by reference the factual allegations of those causes of action. They then make the conclusory assertions that the MySpace party “amounted to a public nuisance within the meaning” of California law; that defendant’s conduct “amounted to, and created, a public nuisance within the meaning” of California law; and that “Plaintiffs were specially injured as alleged in this complaint so as to allow them standing to sue for their injuries arising from said public nuisance.”
As framed by plaintiffs’ complaint, the “nuisance cause of action was merely a clone of the first cause of action using a different label.”
(El Escorial Owners’ Assn.
v.
DLC Plastering, Inc., supra,
Resisting this conclusion, plaintiffs rely on
Birke
v.
Oakwood Worldwide, supra,
To sum up, plaintiffs’ cause of action for public nuisance has no independent vitality, because it merely restates their negligence claims “using a different label.”
(El Escorial Owners’Assn. v. DLC Plastering, Inc., supra,
C. Leave to Amend the Pleading
“Whether to grant leave to amend a complaint is a matter within the discretion of the trial court.”
(Reynolds v. Bement
(2005)
Under the governing substantive law, plaintiffs cannot amend their complaint to state a cause of action for negligence or premises liability. Plaintiffs’ public nuisance cause of action falls with the negligence claims. And plaintiffs have failed to demonstrate a reasonable possibility that the defects in the nuisance claim could be cured by amendment. For all of these reasons, we find no abuse of discretion in the trial court’s decision to sustain the demurrer without leave to amend.
DISPOSITION
Treating the order sustaining the demurrer as a judgment of dismissal, we affirm.
Bamattre-Manoukian, Acting P. J., and Mihara, J., concurred.
Notes
We treat the order as appealable, despite the absence of a judgment of dismissal. The general rale of appealability is this: “An order sustaining a demurrer without leave to amend is not appealable, and an appeal is proper only after entry of a dismissal on such an order.”
(Sisemore
v.
Master Financial, Inc.
(2007)
