Cat N Check: Non-Structural Write-Off Check by Reg

Cat N stands for Category N (non-structural). It is a UK insurance write-off category introduced in 2017, replacing the old Cat D designation. A Cat N vehicle sustained non-structural damage: this includes cosmetic panels, trim, electrical systems, airbag deployment, or non-load-bearing mechanical components. The vehicle's core structure (chassis, crumple zones, pillars) was not compromised. Cat N cars can legally return to the road after repair and do not require a formal structural inspection, but the write-off marker stays on the vehicle's history permanently.

Run a Carhealth vehicle history report using the car's number plate. The report queries UK insurer write-off databases and returns the write-off category, the date of the incident, and whether the vehicle has since been returned to road. Results arrive in under 60 seconds. Free checks such as the DVLA vehicle enquiry service do not include write-off history. An accredited provider is the only way to access insurer records.

In most cases, yes. Because Cat N damage is non-structural, the car's core safety architecture (its chassis, crumple zones, and pillars) should be intact. However, the quality of cosmetic and electrical repairs varies. Poorly repaired airbag systems or substandard panel work can create hidden problems. Before buying, ask for the full repair invoice, check all safety systems work correctly, and consider having an independent pre-purchase inspection. See /write-off-check for information on all write-off categories.

A Cat N designation usually reduces market value compared to a clean-history equivalent, though less than a Cat S. The extent of the reduction depends on repair quality, the original damage severity, and the make and model. Airbag deployments in particular can be expensive to repair properly, and poorly repaired systems are a red flag. Factor the write-off status into your negotiation. A seller asking close to market value for a Cat N car without disclosing the history may be misrepresenting the vehicle.

Yes. You must declare Cat N (and all write-off) history to your insurer when applying for cover. This is a material fact: withholding it can invalidate your policy and result in refused claims. Most insurers ask specifically about write-off history on their application forms. Get quotes from multiple insurers before completing your purchase, as premiums for Cat N cars are typically higher than for undamaged equivalents.

Cat N (non-structural) means the damage was limited to cosmetic, electrical or non-load-bearing components. Cat S (structural) means the chassis, crumple zones or structural pillars were damaged. Both allow the car to return to road after repair, and both must be declared to insurers. Cat S repairs are more expensive, require a formal inspection, and typically cause a larger value reduction. See /cat-s-check for more on Category S write-offs.