A common misconception is that a DUI can only happen on a public road, so driving in a parking lot, a private driveway, or on private land is safe. In California that is not the law, and believing it can lead to a serious mistake. I am Joel Brand, and here is how location actually affects a DUI case.
California's DUI law reaches everywhere
California's DUI statute applies to driving a vehicle anywhere in the state, not just on public highways. Courts have made clear that a DUI can occur in a parking lot, on private property, on a ranch road, or in your own driveway. The law was written this way deliberately, and an earlier version that was limited to highways was changed precisely to close the private-property loophole. Being off the public road does not provide a defense to the charge itself, and anyone counting on that idea is relying on a rule that no longer exists.
Why people get this wrong
The confusion usually comes from older law and from other states. California once limited DUI to highways, and some states still draw a public-versus-private distinction, so the myth persists. People also assume that a private parking lot is somehow outside police authority. None of that holds in current California law. The driving element is satisfied by operating a vehicle, and the location of that operation is not a defense to whether a DUI occurred.
What the setting does change
While location does not defeat a DUI, it can change other things, and that is where the real defense opportunities lie. The lawfulness of the stop can look very different on private property, where the usual traffic-violation basis for pulling someone over may not exist. An officer who contacts a driver sitting in a private lot needs some lawful basis to detain and investigate, and that basis is often weaker than on the open road. The private setting frequently sharpens the question of how the officer came to contact you at all.
The stop and detention questions
On a public road, a traffic violation gives the officer an easy justification for the stop. In a parking lot or driveway, there may be no moving violation to point to, so the officer has to rely on something else, a welfare check, a report from a third party, or observations of apparent impairment. Each of those can be tested. If the detention was not supported by reasonable suspicion, a motion to suppress can challenge everything that followed. The private-property context often makes that challenge stronger than it would be after an ordinary traffic stop.
Was the vehicle even being driven?
Private-property cases frequently involve a parked car, which raises the driving element directly. If officers found you sitting in a stationary vehicle in a lot or driveway and no one saw it move, the prosecution may struggle to prove you actually drove while impaired, as opposed to pulling over, parking, or sitting in the car for some other reason. This overlaps with the no-driving defense, and the private setting, a driveway, a lot, a campground, is exactly where that defense tends to arise.
Related charges may not apply the same way
Some offenses and stop justifications that depend on public-road conduct do not translate cleanly to private property. Certain traffic-based add-on charges and the moving violations often used to justify a stop may not fit a parking lot or private road. That does not erase the DUI, but it can strip away pieces the prosecution would otherwise use, and it can remove the very violation an officer cited as the reason for the contact. Identifying which charges and justifications break down off the public road is part of dismantling the case.
How I defend these cases
The defense focuses on the same core issues as any DUI, whether you actually drove, whether the contact and any detention were lawful, and whether the chemical evidence holds up, but the private-property setting changes the emphasis. I look hardest at how the officer came to contact you and whether there was a lawful basis to detain and investigate, because that is where a parking-lot or driveway case is most often won. A private-property DUI is still a DUI, but the setting can open real defenses around the stop. See also the no-driving defense and my top DUI defenses.
Common private-property scenarios
These cases tend to arise in a handful of recurring situations. Someone pulls into a parking lot or their own driveway to sleep it off, and an officer or a passerby reports the parked car. A dispute or minor incident on private property brings police to the scene, where they then notice signs of drinking. A security guard or property owner calls about a vehicle, and an officer arrives after the driving is over. In each, the impairment may be obvious, but the questions of when the person actually drove, who saw it, and what justified the police contact are wide open, and those questions, not the location, are where the case is decided.
The sleeping-in-the-car overlap
Private-property cases very often involve a driver who chose to park rather than keep driving, which is exactly the conduct the law should not punish as harshly as driving on the road. If you pulled over into a lot or driveway and were found asleep or simply sitting in the car, the prosecution has to prove you drove there while already impaired, not that you became impaired after parking or intended to drive later. That distinction can be the heart of the defense, and it is one reason the private-property setting so frequently produces a winnable case rather than a hopeless one. Choosing to park instead of continuing to drive is exactly the responsible decision the law should encourage, and a careful defense makes sure the prosecution does not turn that decision into the very evidence used against you.
Charged after a parking-lot or driveway stop?
Whether the setting opens a defense turns on exactly how the officer contacted you, which is what I review with you. Use the free case analysis on this page, or call me directly at (888) 271-6644. I answer my own phone, 24/7.