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Is a Roof Rack or Roof Box Legal in the UK?

Legal

Roof racks and roof boxes are legal in the UK. The requirements are practical: the rack and its load must be secure, within the car's roof load limit, and must not overhang dangerously or block your view.

Why?

Carrying things on the roof is normal and legal. The law's concern is that loads are secure - the Highway Code (rule 98) requires that any load is secured so it cannot fall off or shift and cannot stick out dangerously or endanger others. An insecure roof load is an offence and a real hazard.

The other limits are the car's roof load rating and the bar/box rating, which you must not exceed, and visibility - the setup must not obscure the driver's view or the lights and plates. Fit the rack to the manufacturer's designated roof points so it stays put under braking.

Within those limits there is nothing else to clear. A properly fitted, sensibly loaded roof rack or box is fully road-legal; the offences come only from overloading or an insecure, dangerously overhanging load.

What decides if it's legal

  • The load must be secure and cannot fall or shift (Highway Code rule 98).
  • Stay within the car’s maximum roof load and any bar rating.
  • The load must not dangerously overhang or obscure your view.
  • Fit it to the manufacturer’s roof mounting points.

Does it depend on your car?

The roof load limit and mounting points differ by car, so check yours. The secure-load rule and the ban on dangerous overhang are the same for every vehicle.

Related legality guides

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Sources

This page is general guidance, not legal advice, on the rules in the UK for roof rack or roof box. The detail varies by exact vehicle and changes over time - confirm with your insurer and the latest DVSA and GOV.UK guidance before modifying.