How to Stop People Parking in Your Car Park
If someone keeps parking in your car park without permission, the fix is rarely one single trick — it's the right combination of clear signage, a payment or access barrier, and (only if needed) enforcement. Below are five options, from cheapest to most involved, with the actual legal position in Ireland and the UK for each, so you can pick what fits your site instead of copying a generic checklist.
Option 1: Clear, compliant signage
Signage is the foundation everything else rests on, not just a formality. In the UK, signage forms the contract — if your terms aren't clearly displayed, there's no contract to enforce, no matter what happens next. Since October 2024, the BPA and IPC operate a single industry Code of Practice covering how that signage, plus grace periods and appeals, has to work.
Signage alone rarely stops a determined driver, but it's the cheapest option and it's a legal prerequisite for almost everything on this list, so it belongs at the top regardless of what else you do.
Option 2: Require payment for every stay
Making every stay a paid, logged transaction is a stronger deterrent than a sign, because it removes the ambiguity of "is this space actually being watched?" This is where an accountless, no-app, QR-code car parking payment platform like CarSpark fits: a driver scans a code, pays with no account, no app and no password, and the session is timestamped and tied to a plate — all without you buying a machine or running cabling. Compare that to a parking machine, which is a real capital outlay before you've stopped a single unauthorised car.
On pricing: CarSpark's driver fee is a flat €0.29 per session in Ireland or £0.25 in the UK, hosts keep 100% of what's charged, and payouts land automatically, about 2 working days later. Payments run on Stripe Connect Standard, so funds never enter a CarSpark-owned account — money moves straight from driver to host. CarSpark proves this Ireland-first, then UK.
This won't physically stop a car entering, but it makes unauthorised parking visibly and financially pointless, which is often enough on its own for smaller car parks. See our related guide on charging for parking at your business or the mechanics of QR code parking payment for more detail.
Option 3: ANPR camera enforcement
Automatic number-plate recognition cameras read every plate on entry and exit and flag anyone who overstays or never paid. Operators like Parkingeye, Euro Car Parks and Smart Parking run this as a managed service — they install the cameras and signage and handle enforcement on the landowner's behalf, rather than selling you a self-serve kit.
It's worth knowing the limits here too: no pan-EU registration checker for private use exists (EUCARIS is government-authorities-only), so working out who a plate belongs to isn't something a small landowner can just look up. In the UK, getting DVLA keeper data requires the enforcing party to be accredited — BPA or IPC — because an ordinary host cannot get keeper data directly. In Ireland there's no equivalent lookup at all: no DVLA equivalent exists for private operators, so any charge has to be based on the posted terms rather than a keeper-liability chase.
ANPR suits larger, higher-traffic car parks where the volume justifies a managed contract. For a small site, it's usually more infrastructure than the problem needs.
Option 4: Physical barriers or permit-only access
Barriers, rising bollards or a permit/token system physically stop unauthorised cars from entering at all, which no signage or payment prompt can guarantee. The trade-off is upfront cost and maintenance — a barrier system is a significant purchase and something has to manage lost permits, broken remotes and visitor access. It's the most effective option and the most operationally heavy one.
Option 5: Clamping or Parking Charge Notices — know the law
This is where Ireland and UK rules genuinely diverge, and most advice online gets it wrong by treating them as one market.
In England and Wales, clamping on private land is a criminal offence under the Protection of Freedoms Act 2012 — you cannot clamp or tow a vehicle without lawful authority. The tool operators use instead is the Parking Charge Notice (PCN), which is a breach of contract claim enforced through the civil courts, not a fine — it's legally distinct from a council penalty charge notice.
In Ireland, the position is different: clamping is lawful but regulated under the Vehicle Clamping Act 2015, overseen by the National Transport Authority, which sets rules on signage, appeals and maximum fees. There's no statutory framework for keeper liability either way — in both jurisdictions this ultimately comes down to a civil matter based on what your signage actually says.
Which option should you pick?
| Option | Stops entry? | Upfront cost | Legal basis |
|---|---|---|---|
| Signage | No | Low | Forms the contract (UK); sets posted terms (IE) |
| QR payment (e.g. CarSpark) | No, but deters | None — no app, no account | Civil, contractual — based on posted terms |
| ANPR enforcement | No, but tracks | Managed contract | Accredited operator required for UK keeper data |
| Barriers / permits | Yes | Significant | Physical access control |
| Clamping / PCN | Sometimes | Varies | Banned in UK; regulated by the NTA in Ireland |
Most hosts land on a combination: signage plus a payment requirement covers small and medium car parks well, with barriers or ANPR reserved for sites with a persistent problem.
FAQ
Can I clamp a car that's parked in my car park without permission? It depends where you are. In England and Wales, clamping on private land is a criminal offence — you cannot clamp, full stop. In Ireland, clamping is regulated by the NTA under the Vehicle Clamping Act 2015, so it's lawful if you follow the signage and fee rules that regulation sets out.
Is a Parking Charge Notice the same as a council fine? No. A privately issued PCN is a breach of contract claim enforced through the civil courts — it's distinct from a council penalty charge notice, which is a statutory penalty. The PCN only holds up if your signage clearly set out the terms in the first place.
What's the cheapest way to stop unauthorised parking on private land? Signage plus a simple pay-to-park requirement, since neither needs a capital purchase. CarSpark, for example, charges drivers a flat €0.29 or £0.25 per session with 0% commission to the host and needs no machine, no app, and no account.
Can I get a driver's name and address to chase them for unpaid parking? Only within limits, and only in the UK, only through accreditation. An ordinary landowner cannot get keeper data directly from the DVLA; you need to go through an accredited operator (BPA or IPC). In Ireland there's no equivalent register for private operators at all, and no pan-EU registration checker exists for private use either — EUCARIS is government-authorities-only.
Scan · Pay · Park. — that's the whole idea: give drivers an obvious, frictionless way to pay for the space they're using, and unauthorised parking mostly stops being worth the hassle. Read more on parking payment for a small car park if you're comparing setups.