How to stop unauthorised parking on private land

Is unauthorised parking illegal, and can the police help?

In England and Wales, unauthorised parking on private land is a civil matter, not a criminal offence, so the police will not normally attend. Clamping or towing a vehicle without lawful authority is itself a criminal offence. The lawful route is a contract formed through clear signage, which allows a parking charge when the terms are breached.

If you have already rung the police and been told this is a civil matter, that was correct, and it will not change however many times you call. Officers have no power to move, ticket or fine a vehicle simply because it is parked where it should not be.

That leaves clamping and towing looking like the obvious answer, and it is best to be blunt here. Doing either without lawful authority is a criminal offence under the Protection of Freedoms Act 2012, so the frustration is understandable and the option is closed.

The lawful route is a contract rather than a confrontation. Terms displayed on site, breached by the driver, create a parking charge that can be pursued through the civil courts if it goes unpaid.

Scotland sits outside that framework. The Protection of Freedoms Act does not apply there, so there is no automatic keeper liability and a charge rests on contract law against the driver rather than the registered keeper. Part 8 of the Transport (Scotland) Act 2019 would extend liability to the keeper, but it is not yet in force, so a Scottish site needs to identify the driver.

Why a sign on its own stops very little

A sign creates the contract, but it enforces nothing by itself. You also need evidence of when a vehicle arrived and left, a lawful route to the registered keeper, a notice served inside strict deadlines, and a fair appeals process. Break any link in that chain and the charge is unenforceable.

This is the part most advice leaves out, and it is why so many landowners put up a sign, wait, and find nothing has changed. The sign was only ever the first link.

Proof comes next. A single photograph of a parked car says almost nothing, because the charge usually turns on how long the vehicle stayed, not that it was there at one moment. Timestamped entry and exit reads are what turn a complaint into evidence.

Then comes the question of who you can lawfully chase. If the driver cannot be identified, the registered keeper can only be pursued through an accredited route, and only if the paperwork lands inside the deadline. Courts treat a late or incomplete notice as fatal, not as a technicality to be waved through.

So the sign is necessary and nowhere near sufficient. What actually works is parking access and control as a chain: terms, evidence, identification, notice and appeal, each link holding the next one up.

The 4 ways to control it, and what each one really does

There are 4 practical ways to control unauthorised parking: signage with self ticketing, wardens on patrol, barriers that control entry and exit, and ANPR cameras that read every plate. All 4 work. The right one depends on the size of the site, its layout, and how often it needs watching.

A private road or a small yard is not a large retail car park, and matching the method to the site matters more than buying the most advanced thing on the shelf.

Self ticketing suits low traffic sites where hardware is hard to justify, though it only works if somebody walks the site consistently. Wardens bring judgement a camera cannot: they spot the driver in genuine difficulty and settle a dispute on the spot. Their limit is coverage, because a site is only protected for the hours somebody is there.

Barriers and access control stop the vehicle at the entrance instead of arguing with it afterwards, which suits sites where keeping people out matters more than charging them later. Parka supplies and supports both barriers and compliant signage, because the strongest setups pair a physical stop with terms a court will uphold.

For larger or higher turnover sites, reading every plate does more with far less daily effort, which is where the next option earns its place.

How ANPR turns unauthorised parking into something you can act on

ANPR cameras read every plate on entry and exit and match it against payments, permits and whitelists for staff, residents, contractors and genuine guests. Grace periods cover drop offs and wrong turns without a charge, and every read is timestamped, which gives you the evidence trail a charge needs if it is appealed.

This is the point where unauthorised parking stops being a guessing game. Rather than a warden happening to notice a vehicle, the site itself knows what is on it and how long it has been there.

Parka's ANPR cameras capture every plate and cross check it against who has paid and who holds a permit, so the people who belong on site move through without ever being treated as a problem. The exceptions are where operators get the most value: one rule for staff, another for contractors, another again for a guest already charged at the front desk, all held against the same record and none of it needing a paper permit on a windscreen.

Paying has to be easy for the visitors you want, which is why payment kiosks and the Parka app sit alongside the cameras rather than behind them. A driver who can pay in seconds rarely becomes a dispute.

And when a charge is challenged, which it will be, the answer is a timestamped record of an arrival, a departure and a payment that never happened, rather than somebody's recollection of a Tuesday afternoon.

What it costs, and why you keep being offered it for free

Parka works with operators however suits them: rent the hardware and software, buy the hardware outright, agree a per transaction revenue share, or pay a flat fee, so most pay little to nothing up front. Bought outright, a full setup can run from roughly £10,000 to well over £100,000 depending on the site, before the monthly software.

What moves that number is the mix a site actually needs. Cameras, barriers, kiosks, signage, EV charging, the groundworks and power to feed all of it, connectivity, and the software and support that hold it together. A single entry road and a multi storey car park have almost nothing in common, and a quote that ignores the difference is not a quote worth reading.

If you have been offered car park management for nothing, look twice rather than saying yes. Somebody is always paid in this industry, whether out of the charges issued to drivers, a share of the takings, or a fee sitting further down the contract. That is not a scandal, it is a business model, and it can be a perfectly good one.

Parka puts the model in writing for exactly that reason. A landowner should be able to see who earns what and when before signing anything, and we aim to earn only when your car park earns.

Getting it right without punishing your genuine visitors

A Notice to Keeper must be served within 14 days, or 29 days where a notice was left on the windscreen, and the keeper cannot be pursued until 28 days after that. DVLA keeper records cost £2.50 each and require BPA or IPC membership. Private parking charges are commonly capped at £100.

The rules are strict on purpose. A private operator can pursue money from a stranger over a vehicle, so the process that allows it is tightly drawn, and the courts hold operators to it rather than making allowances.

The sector is also under more scrutiny than it used to be. The British Parking Association and the International Parking Community launched a single Code of Practice on 27 June 2024, and every member has until 31 December 2026 to meet it in full, with a separate government code still pending. Operators issued 4.3 million parking charge notices between April and June 2025, so this is an industry running at real scale, not a niche corner of the law.

Getting the mechanics right is only half the job. A sensible grace period, a whitelist for staff, residents, contractors and booked guests, and an appeals route that a reasonable person would call fair are what keep an enforceable system from becoming an unfair one.

Do it properly and the bays go back to the people they were built for. The site stops leaking value to vehicles that were never meant to be there, and a car park that has been a running cost for years starts funding its own upkeep.