The defendant McLaughlin, on October 17, 1938, owned No. 712 Avenue Ó, Brooklyn, N. Y., a small dwelling house. It had a courtyard in front thereof, inclosed on three sides with a wire fence eighteen inches high. This courtyard was nineteen feet, eleven inches, deep, and fifteen feet, five inches, wide. Of its depth eight feet extended beyond the legal building fine, over and upon the sidewalk area. The courtyard, however, did not extend beyond the actual sidewalk or street fine of the adjacent houses. There was a sidewalk space from the front fence to the curb of ten feet, six inches. She acquired the property *247two years before, in November, 1936, at which time the courtyard, as thus fenced, existed, it having been constructed by a predecessor in title in 1926.
The plaintiff boy, thirteen and one-half years old, called hereinafter “ plaintiff,” lived next door, at No. 710 Avenue 0, for about foui’ months prior to October 17, 1938. On that day he and two other boys were engaged in plaining “ stoopball ” in front of the plaintiff’s house. The ball bounded into the courtyard of the McLaughlin house next door, and plaintiff proceeded to retrieve it. He stepped over the fence with one foot, reached for the ball and found it was just beyond his reach. While in the act of bringing his other foot over he tripped, fell and suffered injuries solely because he did not lift his foot high enough to clear the fence. On many prior occasions, he, without difficulty, stepped over the fence without tripping. He complains of the existence of the courtyard and fence, but not of the character or condition of the fence.
(A) The germane reciprocal rights and duties, where an article sought to be retrieved was put in motion by an act of nature (a gust of wind), are stated in a pertinent illustration, in exact accord with the actual decision in Tymon v. M. L. S. Construction Co. (262 N. Y. 161, 166). It was there said: “ Under such circumstances the loser would have the implied right or permission to go into the areaway [within street lines] to recover the lost article. The likelihood of such an occurrence would require mutual regard for the safety of one for the other. The person entering would be obliged to use care and caution, and the owner would be obliged to maintain the areaway free from bidden and known dangers.”
Where an article was put in motion by human act or agency, the duty of the property owner is no greater and the corresponding duty of the entrant is no less than when an article was put in motion by an act of nature.
When plaintiff stepped over this fence, under the circumstances of this accident, he necessarily had the fence vividly in mind; at that moment and prior thereto he was aware of and alert to its presence. His close proximity and posture with reference to the fence were voluntary and knowing acts. His tripping, therefore, was due to his own negligence and a failure to act with ordinary care, judged by the standard erected by his own conduct on prior occasions, which standard is in harmony with common knowledge.
*248This view is not in conflict with Feinman v. Rubenstein (240 App. Div. 899; affd., 264 N. Y. 662), where liability was sustained by a divided court. A courtyard was not there involved. It was a grassplot between a concrete sidewalk and a curb in which there were a tree, two bushes and some grass. There was also imbedded in the ground a remnant, in the form of a short twelve-inch post or peg, of a previously existing low string and peg fence. A running tennis player tripped over this obstruction in seeking to recover a ball which had rolled some distance beyond but in line with this dangerous obstruction or post. Such a situation is in nowise similar to that herein.
The instant case is not one where, with knowledge of the existence of an obstruction or fence, a preoccupied person momentarily forgets it, and falls over it, or one where a pedestrian has been crowded over by another and inadvertently falls over or on the fence. Here we have an experienced, mature and agile boy voluntarily acting in an incident with the existence of the fence immediately in mind.
Plaintiff, accordingly, was guilty of contributory negligence as a matter of law.
This conclusion is fortified by another doctrine, recourse to which is not imperative. That principle is that where one deliberately leaves a street area, which the physical conditions reveal the public is invited to use or travel upon, and enters upon a part of such street area, which the physical conditions disclose the public is not invited to use or travel upon, he must take the conditions as they are, and a municipality may not be held responsible therefor. (King v. Village of Fort Ann, 180 N. Y. 496, 501; Flansburg v. Town of Elbridge, 205 id. 423, 430; Horton v. City of New York, 213 App. Div. 172.)
(B) It is urged that the existence of this fenced-in courtyard, partly on the public street or sidewalk, was not a nuisance as a matter of law. In considering this assertion it must be recognized that an inclosed courtyard is a customary and traditional street purpose or use. (McCloskey v. Buckley, 223 N. Y. 187, 192; Tymon v. M. L. S. Construction Co., supra; Linton v. Coupe, 138 App. Div. 518, 522.)
To determine this contention requires recourse to cases, some of which are in seeming conflict. We have been told “No hard and fast rule can be formulated ” as to when the question is one *249of law or one of fact (McCloskey v. Buckley, supra), but as the pertinent cases do not defy classification we may do so and extract and apply the rule controlling herein. This may be done if we disregard inapposite language in some opinions and closely regard or heed the precise facts in each case. “ We think that each case must depend on its own facts for classification as a nuisance at law, or in fact, or neither.” (Italics ours.) (Melker v. City of New York, 190 N. Y. 481, 488.)
(1) When a property owner maintains a courtyard, a structure or an article on a public street, for a street purpose, pursuant to express permission under an ordinance, its maintenance is not a nuisance, as a matter of law, in the absence of danger due to its form, character or condition of disrepair. (Matter of Clinton Avenue, 57 App. Div. 166; affd., 167 N. Y. 624; Linton v. Coupe, supra; City of New York v. Masten, 174 App. Div. 661; affd., 223 N. Y. 638; Tymon v. M. L. S. Construction Co., supra.)
(2) When a property owner to “ ‘ eke out the inconvenience of his own premises/ ” for the purposes of trade or business, that is, for a use which is not a customary or traditional street purpose, maintains an incumbrance or obstruction on a public street, it is a nuisance as a matter of law. (McCloskey v. Buckley, supra, pp. 191, 193; Kunz v. City of Troy, 104 N. Y. 344; Wells v. City of Brooklyn, 9 App. Div. 61; Cohen v. Mayor, etc., of New York, 113 N. Y. 532.)
(3) When a property owner, without an express permit so to do, indulges in a customary or traditional street use to beautify his property or to facilitate its enjoyment, the maintenance of such a structure, article or object on the public street, as distinguished from its intrinsic character or condition, is not a nuisance, as a matter of law. (Robert v. Powell, 168 N. Y. 411; Dougherty v. Village of Horseheads, 159 id. 154; McCloskey v. Buckley, supra.)
(4) When a property owner, for a private or non-business use, encroaches upon a public street or sidewalk, for other than a street purpose, but which use closely resembles a street purpose, such as a stoop or an entrance post or structure, whether such a theoretical obstruction is a nuisance is, ordinarily, a question of fact and not one of law. (McCloskey v. Buckley, supra [entrance post]; Shaw v. City of New York, 253 App. Div. 924 [cement coping with low iron picket fence]; Saphir v. Childs Co., Inc., 243 id. 636 [projecting water faucet].)
*250(5) When a property owner maintains a structure on a public street, which is a part of what is essentially a street purpose or use, but which, by reason of its permanent character or condition may be held to be intrinsically and potentially dangerous, whether or not such structure is a nuisance to one coming in contact with it inadvertently, is ordinarily a question of fact (Bland v. Kaufman, 249 App. Div. 842 [low iron fence with sharp pickets]); and the rule is the same as to what likewise may be held to be an intrinsically and potentially dangerous temporary structure or obstruction. (O’Rourke v. Castagnola, 242 App. Div. 638 [low posts and wires].)
The case at bar is sui generis or it belongs in the above third group. After the writer filed his opinion when this case was decided his attention was called to section C26-233.0 of the Administrative Code of the City of New York (Laws of 1937, chap. 929). That section relates to “ Existing encroachments beyond the building fine.” It provides that “ Such parts of structures as project beyond the building fine on January first, nineteen hundred thirty-eight, may be maintained as constructed until their removal is directed by the council or the board of estimate * * The structure herein existed on that day, and so much of it as inclosed an eight-foot portion of the courtyard projected beyond the building line. This statute is the equivalent of an express permission given prior to the erection of the structure. This statutory provision, therefore, permits or requires that this case be allocated to the first group set out in the opinion (Pine Grove Poultry Farm, Inc., v. Newtown By-Products Mfg. Co., Inc., 248 N. Y. 293). It parallels the facts in Robert v. Powell (supra), except in one particular. There, as here, the property owner indulged in a traditional street use, to wit, a stepping-stone. He had, as here, no express permit so to do. (See record on appeal, Gaynor, J., fol. 32.) There, as here, the condition of the structure was not the subject of complaint. There, the structure was entirely on the sidewalk in a heavily built-up residential section in Manhattan. Here, the structure is partly on a sidewalk in an outlying suburban residential section. There, as here, a claimed prohibitory ordinance, to which reference hereinafter will be made, was invoked. There, the structure narrowed the space on the sidewalk for pedestrians to eight feet; here, the sidewalk space was narrowed to ten feet, six inches, but without changing the actual sidewalk or street line as fixed by adjacent buildings. There, at night, the plaintiff attempted to cross the sidewalk to hail or get a cab and unwittingly stumbled over the structure. Here, the plaintiff, in daylight, tripped over the struc*251ture while consciously stepping over it. There, the complaint was dismissed on the theory that the structure, being a street use, was not a nuisance, as a matter of law. Here, a similar ruling would be required by that case. There, the factual set-up was less favorable to the defendant than it is in this case.
To emphasize the narrow grounds necessary to such a holding herein, it may be observed that under the doctrine of Robert v. Powell (supra), this courtyard fence would not be a nuisance, as a matter of law, as to an ordinary pedestrian inadvertently falling over it at a point on the eight-foot portion of the courtyard, within the legal street line but not within the actual sidewalk line. But this need not be decided. It may well be that such a structure might be a nuisance as a matter of fact as to one person, and not a nuisance as a matter of law as to another, depending upon whether the contact was due to a deliberate act, a voluntarily assumed posture and close proximity, with immediate and present knowledge of the existence of the structure, or was due to an inadvertent contact occurring under circumstances where the existence of the structure would not be necessarily present in the mind of the person injured.
Therefore, under the doctrine of the third group of cases, to which the factual situation herein requires this case to be allocated, the structure as to the eight-foot portion of the courtyard, was not, as to this plaintiff, under the circumstances of the incident herein, a nuisance, as a matter of law.
(C) It is urged that under the Administrative Code of the City of New York, section 82d6-1.0, the courtyard and structure surrounding it were prohibited. This provision forbidding incumbering and “ lumbering ” of sidewalks was formerly section 140 of article 13 of chapter 23 of the Code of Ordinances of the City of New York. This provision and the predecessor counterparts thereof, since the year 1793, have all been directed against incumbrances upon and user of streets by abutting owners for business, commercial, trade and similar purposes; that is, for other than traditional street purposes or uses. It has no application herein. A similar prohibitory ordinance was so construed in Robert v. Powell (supra) and held not to relate to or concern a street purpose or use.
(D) It should be further observed that the instructions to the jury did not inform it, with adequate clearness, as to the factors it should consider in determining whether this courtyard fence *252was a nuisance, if the question were one of fact, such as the extent of sidewalk left available for pedestrians, in relation to adjacent sidewalks; the general character of the neighborhood; whether the street was a much traveled one; whether a distinction was fairly to be made between a street in an outlying section and a street in a congested part of the town, and whether or not a distinction was to be made as between a pedestrian contacting it inadvertently and one contacting it as an incident to deliberate action with vivid present knowledge of the existence of the fence.
The judgment should be reversed on the law and the facts, with costs, and the complaint dismissed on the law, with costs.
The order, in so far as it denies the motion of defendant The City of New York for judgment over on its cross-complaint against defendant McLaughlin, should be affirmed, with costs to defendant McLaughlin against the appellant The City of New York.
The appeal by defendant The City of New York from so much of said order as denies its motion to set aside the verdict and to grant a new trial should be dismissed, without costs.
Hagarty and Close, JJ., concur; Lazansky, P. J., in opinion, concurs in the determination of the appeal from the order, and concurs for the reversal of the judgment, but dissents as to the dismissal of the complaint and votes for a new trial; Taylor, J., concurs with Lazansky, P. J.