Justice Powell
announced the judgment of the Court and delivered an opinion,
in which Justice Brennan, Justice White, and Justice Marshall joined.
This case presents questions as to the authority of arson investigators, in the absence of exigent circumstances or consent, to enter a private residence without a warrant to investigate the cause of a recent fire.
Respondents, Raymond and Emma Jean Clifford, were arrested and charged with arson in connection with a fire at their private residence. At the preliminary examination held to establish probable cause for the alleged offense, the State introduced various pieces of physical evidence, most of which was obtained through a warrantless and nonconsensual search of the Cliffords’ fire-damaged home. Respondents moved to suppress this evidence on the ground that it was obtained in violation of their rights under the Fourth and Fourteenth Amendments. That motion was denied and respondents were bound over for trial. Before trial, they again moved to suppress the evidence obtained during the search. The trial court conducted an evidentiary hearing and denied the motion on the ground that exigent circumstances justified the search. The court certified its eviden-tiary ruling for interlocutory appeal and the Michigan Court of Appeals reversed.
That court held that there were no exigent circumstances justifying the search. Instead, it found that the warrantless entry and search of the Clifford residence were conducted pursuant to a policy of the Arson Division of the Detroit Fire Department that sanctioned such searches as long as the owner was not present, the premises were open to trespass, and the search occurred within a reasonable time of the fire. The Court of Appeals held that this policy was inconsistent with Michigan v. Tyler, 436 U. S. 499 (1978), and that the warrantless nonconsensual search of the Cliffords’ residence violated their rights under the Fourth and Fourteenth Amendments. We granted certiorari to clarify doubt that appears to exist as to the application of our decision in Tyler. 459 U. S. 1168 (1983).
II
In the early morning hours of October 18, 1980, a fire erupted at the Clifford home. The Cliffords were out of town on a camping trip at the time. The fire was reported to the Detroit Fire Department, and fire units arrived on the scene about 5:40 a. m. The fire was extinguished and all fire officials and police left the premises at 7:04 a. m.
At 8 o’clock on the morning of the fire, Lieutenant Beyer, a fire investigator with the arson section of the Detroit Fire Department, received instructions to investigate the Clifford fire. He was informed that the Fire Department suspected arson. Because he had other assignments, Lieutenant Beyer did not proceed immediately to the Clifford residence. He and his partner finally arrived at the scene of the fire about 1 p. m. on October 18.
When they arrived, they found a work crew on the scene. The crew was boarding up the house and pumping some six inches of water out of the basement. A neighbor told the investigators that he had called Mr. Clifford and had been instructed to request the Cliffords’ insurance agent to send a boarding crew out to secure the house. The neighbor also advised that the Cliffords did not plan to return that day. While the investigators waited for the water to be pumped out, they found a Coleman fuel can in the driveway that was seized and marked as evidence.
By 1:30 p. m., the water had been pumped out of the basement and Lieutenant Beyer and his partner, without obtaining consent or an administrative warrant, entered the Clifford residence and began their investigation into the cause of the fire. Their search began in the basement and they quickly confirmed that the fire had originated there beneath the basement stairway. They detected a strong odor of fuel throughout the basement, and found two more Coleman fuel cans beneath the stairway. As they dug through the debris, the investigators also found a crock pot with attached wires leading to an electrical timer that was plugged into an outlet a few feet away. The timer was set to turn on at approximately 3:45 a. m. and to turn back off at approximately 9 a. m. It had stopped somewhere between 4 and 4:30 a. m. All of this evidence was seized and marked.
After determining that the fire had originated in the basement, Lieutenant Beyer and his partner searched the remainder of the house. The warrantless search that followed was extensive and thorough. The investigators called in a photographer to take pictures throughout the house. They searched through drawers and closets and found them full of old clothes. They inspected the rooms and noted that there were nails on the walls but no pictures. They found wiring and cassettes for a video tape machine but no machine.
Respondents moved to exclude all exhibits and testimony based on the basement and upstairs searches on the ground that they were searches to gather evidence of arson, that they were conducted without a warrant, consent, or exigent circumstances, and that they therefore were per se unreasonable under the Fourth and Fourteenth Amendments. Petitioner, on the other hand, argues that the entire search was reasonable and should be exempt from the warrant requirement.
Ill
In its petition for certiorari, the State does not challenge the state court’s finding that there were no exigent circumstances justifying the search of the Clifford home. Instead, it asks us to exempt from the warrant requirement all administrative investigations into the cause and origin of a fire. We decline to do so.
In Tyler, we restated the Court’s position that administrative searches generally require warrants. 436 U. S., at 504-508. See Marshall v. Barlow’s, Inc., 436 U. S. 307 (1978); Camara v. Municipal Court, 387 U. S. 523 (1967); See v. City of Seattle, 387 U. S. 541 (1967). We reaffirm that view again today. Except in certain carefully defined classes of cases, the nonconsensual entry and search of property are governed by the warrant requirement of the Fourth and Fourteenth Amendments. The constitutionality of warrantless and nonconsensual entries onto fire-damaged premises, therefore, normally turns on several factors: whether there are legitimate privacy interests in the fire-damaged property that are protected by the Fourth Amendment; whether exigent circumstances justify the government intrusion regardless of any reasonable expectations of privacy; and, whether the object of the search is to determine the cause of fire or to gather evidence of criminal activity.
A
We observed in Tyler that reasonable privacy expectations may remain in fire-damaged premises. “People may go on living in their homes or working in their offices after a fire. Even when that is impossible, private effects often remain on the fire-damaged premises.” Tyler, 436 U. S., at 505. Privacy expectations will vary with the type of property, the amount of fire damage, the prior and continued use of the premises, and in some cases the owner’s efforts to secure it against intruders. Some fires may be so devastating that no reasonable privacy interests remain in the ash and ruins, regardless of the owner’s subjective expectations. The test essentially is an objective one: whether “the expectation [is] one that society is prepared to recognize as ‘reasonable.’” Katz v. United States, 389 U. S. 347, 361 (1967) (Harlan, J., concurring). See also Smith v. Maryland, 442 U. S. 735, 739-741 (1979). If reasonable privacy interests remain in the fire-damaged property, the warrant requirement applies, and any official entry must be made pursuant to a warrant in the absence of consent or exigent circumstances.
B
A burning building of course creates an exigency that justifies a warrantless entry by fire officials to fight the blaze. Moreover, in Tyler we held that once in the building, officials need no warrant to remain for “a reasonable time to investigate the cause of a blaze after it has been extinguished.” 436 U. S., at 510. Where, however, reasonable expectations of privacy remain in the fire-damaged property, additional investigations begun after the fire has been extinguished and fire and police officials have left the scene, generally must be made pursuant to a warrant or the identification of.some new exigency.
The aftermath of a fire often presents exigencies that will not tolerate the delay necessary to obtain a warrant or to secure the owner’s consent to inspect fire-damaged premises. Because determining the cause and origin of a fire serves a compelling public interest, the warrant requirement does not apply in such cases.
c
If a warrant is necessary, the object of the search determines the type of warrant required. If the primary object is to determine the cause and origin of a recent fire, an administrative warrant will suffice. To obtain such a warrant, fire officials need show only that a fire of undetermined origin has occurred on the premises, that the scope of the proposed search is reasonable and will not intrude unnecessarily on the fire victim’s privacy, and that the search will be executed at a reasonable and convenient time.
If the primary object of the search is to gather evidence of criminal activity, a criminal search warrant may be obtained only on a showing of probable cause to believe that relevant evidence will be found in the place to be searched. If evidence of criminal activity is discovered during the course of a valid administrative search, it may be seized under the “plain view” doctrine. Coolidge v. New Hampshire, 403 U. S. 443, 465-466 (1971). This evidence then may be used to establish probable cause to obtain a criminal search warrant. Fire officials may not, however, rely on this evidence to expand the scope of their administrative search without first making a successful showing of probable cause to an independent judicial officer.
The object of the search is important even if exigent circumstances exist. Circumstances that justify a warrantless search for the cause of a fire may not justify a search to gather evidence of criminal activity once that cause has been determined. If, for example, the administrative search is justified by the immediate need to ensure against rekindling, the scope of the search may be no broader than reasonably necessary to achieve its end. A search to gather evidence of criminal activity not in plain view must be made pursuant to a criminal warrant upon a traditional showing of probable cause.
The searches of the Clifford home, at least arguably, can be viewed as two separate ones: the delayed search of the basement area, followed by the extensive search of the residential portion of the house. We now apply the principles outlined above to each of these searches.
IV
The Clifford home was a two-and-one-half story brick and frame residence. Although there was extensive damage to the lower interior structure, the exterior of the house and some of the upstairs rooms were largely undamaged by the fire, although there was some smoke damage. The firemen had broken out one of the doors and most of the windows in fighting the blaze. At the time Lieutenant Beyer and his partner arrived, the home was uninhabitable. But personal belongings remained, and the Cliffords had arranged to have the house secured against intrusion in their absence. Under these circumstances, and in light of the strong expectations of privacy associated with a home, we hold that the Cliffords retained reasonable privacy interests in their fire-damaged residence and that the postfire investigations were subject to the warrant requirement. Thus, the warrantless and non-consensual searches of both the basement and the upstairs areas of the house would have been valid only if exigent circumstances had justified the object and the scope of each.
A
As noted, the State does not claim that exigent circumstances justified its postfire searches. It argues that we either should exempt postfire searches from the warrant requirement or modify Tyler to justify the warrantless searches in this case. We have rejected the State’s first argument and turn now to its second.
In Tyler we upheld a warrantless postfire search of a furniture store, despite the absence of exigent circumstances, on the ground that it was a continuation of a valid search begun immediately after the fire. The investigation was begun as the last flames were being doused, but could not be completed because of smoke and darkness. The search was resumed promptly after the smoke cleared and daylight dawned. Because the postfire search was interrupted for reasons that were evident, we held that the early morning search was “no more than an actual continuation of the first, and the lack of a warrant thus did not invalidate the resulting seizure of evidence.” 436 U. S., at 511.
As the State conceded at oral argument, this case is distinguishable for several reasons. First, the challenged search was not a continuation of an earlier search. Between the time the firefighters had extinguished the blaze and left the scene and the arson investigators first arrived about 1 p. m. to begin their investigation, the Cliffords had taken steps to secure the privacy interests that remained in their residence against further intrusion. These efforts separate the entry made to extinguish the blaze from that made later by different officers to investigate its origin. Second, the privacy interests in the residence — particularly after the Cliffords had acted — were significantly greater than those in the fire-damaged furniture store, making the delay between the fire and the midday search unreasonable absent a warrant, consent, or exigent circumstances. We frequently have noted that privacy interests are especially strong in a private resi-deuce. These facts — the interim efforts to secure the burned-out premises and the heightened privacy interests in the home — distinguish this case from Tyler. At least where a homeowner has made a reasonable effort to secure his fire-damaged home after the blaze has been extinguished and the fire and police units have left the scene, we hold that a subsequent postfire search must be conducted pursuant to a warrant, consent, or the identification of some new exigency. So long as the primary purpose is to ascertain the cause of the fire, an administrative warrant will suffice.
B
Because the cause of the fire was then known, the search of the upper portions of the house, described above, could only have been a search to gather evidence of the crime of arson. Absent exigent circumstances, such a search requires a criminal warrant.
Even if the midday basement search had been a valid administrative search, it would not have justified the upstairs search. The scope of such a search is limited to that reasonably necessary to determine the cause and origin of a fire and to ensure against rekindling. As soon as the investigators determined that the fire had originated in the basement and had been caused by the crock pot and timer found beneath the basement stairs, the scope of their search was limited to the basement area. Although the investigators could have used whatever evidence they discovered in the basement to establish probable cause to search the remainder of the house, they could not lawfully undertake that search without a prior judicial determination that a successful showing of probable cause had been made. Because there were no exigent circumstances justifying the upstairs search, and it was undertaken without a prior showing of probable cause before an independent judicial officer, we hold that this search of a home was unreasonable under the Fourth and Fourteenth Amendments, regardless of the validity of the basement search.
The warrantless intrusion into the upstairs regions of the Clifford house presents a telling illustration of the importance of prior judicial review of proposed administrative searches. If an administrative warrant had been obtained in this case, it presumably would have limited the scope of the proposed investigation and would have prevented the warrantless intrusion into the upper rooms of the Clifford home. An administrative search into the cause of a recent fire does not give fire officials license to roam freely through the fire victim’s private residence.
V
The only pieces of physical evidence that have been challenged on this interlocutory appeal are the three empty fuel cans, the electric crock pot, and the timer and attached cord. Respondents also have challenged the testimony of the investigators concerning the warrantless search of both the basement and the upstairs portions of the Clifford home. The discovery of two of the fuel cans, the crock pot, the timer and cord — as well as the investigators’ related testimony — were the product of the unconstitutional postfire search of the Cliffords’ residence. Thus, we affirm that portion of the judgment of the Michigan Court of Appeals that excluded that evidence. One of the fuel cans was discovered in plain view in the Cliffords’ driveway. This can was seen in plain view during the initial investigation by the firefighters. It would have been admissible whether it had been seized in the basement by the firefighters or in the driveway by the arson investigators. Exclusion of this evidence should be reversed.
It is so ordered.
The can had been found in the basement by the fire officials who had fought the blaze. The firemen removed the can and put it by the side door where Lieutenant Beyer discovered it on his arrival.
See, e. g., Donovan v. Dewey, 452 U. S. 594 (1981) (heavily regulated business); United States v. Biswell, 406 U. S. 311 (1972) (same); Colonnade Corp. v. United States, 397 U. S. 72 (1970) (same). The exceptions to the warrant requirement recognized in these cases are not applicable to the warrantless search in this case.
We do not suggest that firemen fighting a fire normally remain within a building. The circumstances, of course, vary. In many situations actual entry may be too hazardous until the fire has been wholly extinguished, and even then the danger of collapsing walls may exist. Thus, the effort to ascertain the cause of a fire may extend over a period of time with entry and reentry. The critical inquiry is whether reasonable expectations of privacy exist in the fire-damaged premises at a particular time, and if so, whether exigencies justify the reentries.
For example, an immediate threat that the blaze might rekindle presents an exigency that would justify a warrantless and nonconsensual postfire investigation. “Immediate investigation may also be necessary to preserve evidence from intentional or accidental destruction.” See Michigan v. Tyler, 436 U. S. 499, 510 (1978).
Probable cause to issue an administrative warrant exists if reasonable legislative, administrative, or judicially prescribed standards for conducting an inspection are satisfied with respect to a particular dwelling. See particularly Tyler, supra; see also Camara v. Municipal Court, 387 U. S. 523, 538 (1967).
The plain-view doctrine must be applied in light of the special circumstances that frequently accompany fire damage. In searching solely to ascertain the cause, firemen customarily must remove rubble or search other areas where the cause of fires is likely to be found. An object that comes into view during such a search may be preserved without a warrant.
See, e. g., Payton v. New York, 445 U. S. 578, 589-590 (1980); United States v. United States District Court, 407 U. S. 297, 313 (1972). Reasonable expectations of privacy in fire-damaged premises will vary depending particularly on the type and use of the building involved. Expectations of privacy are particularly strong in private residences and offices. There may be, depending upon the circumstances, diminished privacy expectations in commercial premises.
This is not to suggest that individual expectations of privacy may prevail over interests of public safety. For example, when fire breaks out in an apartment unit of an apartment complex, the exigency exception may allow warrantless postfire investigations where necessary to ensure against any immediate danger of future fire hazard.
In many cases, there will be no bright line separating the firefighters’ investigation into the cause of a fire from a search for evidence of arson. The distinction will vary with the circumstances of the particular fire and generally will involve more than the lapse of time or the number of entries and reentries. For example, once the cause of a fire in a single-family dwelling is determined, the administrative search should end, and any broader investigation should be made pursuant to a criminal warrant. A fire in an apartment, on the other hand, may present complexities that make it necessary for officials to conduct more expansive searches, to remain on the premises for longer periods of time, and to make repeated entries and reentries into the building. See Tyler, 436 U. S., at 510, n. 6.