Vehicle Impact Damage: When a Car Hits Your Building

More Damage Than Meets the Eye

When a vehicle strikes a building, the visible damage — a hole in the wall, broken siding, cracked stucco — is almost always just a fraction of the actual damage. The force of a vehicle impact transfers energy through the structure in ways that are not immediately apparent. What looks like damage to one wall may actually involve shifted framing, compromised foundation elements, cracked interior walls on the opposite side of the building, and misaligned doors and windows throughout the structure.

Insurance adjusters frequently underestimate vehicle impact damage because they assess what they can see from the surface. But the real cost of properly repairing a vehicle impact often far exceeds the visible damage. Framing members may be cracked, split, or displaced behind intact drywall. The foundation may have shifted or cracked. Roof trusses may have been stressed. Plumbing and electrical lines running through affected walls may be damaged.

Damage on the Opposite (Back) Side of the Impact

When a vehicle strikes a building, the energy does not stop at the impact wall. Force transfers through framing, floor diaphragms, and roof structure into rooms and elevations on the opposite side of the house. It is common to find cracked drywall, separated trim, misaligned doors and windows, popped nails, and hairline foundation cracks on the back of a structure that was struck from the front — damage the adjuster never inspected because they only looked at the obvious impact zone. Walk the entire perimeter and the full interior. Document everything that is out of plumb, out of square, or newly separated.

Electrical and System Triggers After Vehicle Impact

Vehicle impacts can cause sudden mechanical jolts that damage systems inside the building — even systems far from the impact point. Common hidden issues include:

• Electrical arc-fault and short-circuit damage. The jolt can shift wiring behind drywall and cause arcing or hidden short circuits. Check for tripped breakers, intermittent outlets, or burn marks.
• GFCI/AFCI device trips. Breakers or outlets that trip repeatedly after the event may signal a damaged circuit behind the wall.
• HVAC and appliance triggers. Connected appliances, furnaces, and compressors can suffer internal damage from the impact-induced power surge or mechanical shock. Do not assume equipment is fine because it turns on.
• Plumbing leaks. Rigid plumbing lines can develop pinhole leaks at joints after an impact — sometimes not apparent for days or weeks.
• Fire-sprinkler systems. Impact can misalign piping or damage heads, creating slow leaks or future-failure risk.

Law & Ordinance Coverage on Vehicle-Impact Claims

When a repair requires opening framing, disturbing electrical, or modifying structural components, the building department may require that the affected portions be brought up to current code. This triggers your Law and Ordinance (L&O) coverage. Vehicle-impact claims routinely implicate code upgrades — to electrical, framing connections (hardware, hurricane straps, shear panels), insulation, fire-rating, and egress requirements. Do not let the carrier estimate the job as if no code upgrades apply. If a permit and inspection are involved, L&O is usually on the table.

Hidden Framing and Foundation Damage

Framing damage is one of the most commonly overlooked issues in vehicle impact claims. Wall studs, headers, sill plates, and rim joists can all be damaged without any visible indication on the exterior or interior surface. The only way to properly assess framing damage is to open up the walls — remove drywall or interior finishes to expose the structural members. If the insurance company wants to repair only the surface damage without investigating the framing behind it, they are not conducting a proper assessment.

Foundation shifting is another critical concern. Even a seemingly moderate impact can cause a section of foundation to crack or shift, especially in older construction or where the impact occurs near a corner. Signs of foundation movement include new cracks in interior walls, doors or windows that suddenly do not open or close properly, and visible separation between walls and floors or ceilings.

Insurance and Liability

Your homeowners insurance policy covers damage to your building from a vehicle impact — it is a covered peril under virtually all standard policies. You can and should file a claim under your own policy to get the repairs started. Your insurance company may then pursue the driver's auto liability insurance through subrogation to recover what they paid on your claim.

You may also have a direct claim against the driver's auto liability policy for damage to your property. Obtaining a police report is essential — it documents the incident and identifies the driver and their insurance information. If the driver was uninsured or fled the scene, your homeowners policy still covers the building damage.

Protecting Your Claim

After a vehicle impact, call the police to file a report and document the scene. Take photos and video of all visible damage from multiple angles, including the vehicle's position if it is still present. Get the driver's insurance information and contact details. Do not allow any repairs until both your insurance company and a structural engineer have assessed the damage. If the damage is significant, a licensed Public Adjuster can help ensure the full extent of structural damage is identified and included in your claim.