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Branch Brook Dry-Out ProsWater Damage Help · Newark, NJ

What Should You Do If the Upstairs Neighbor Causes a Leak?

Last updated October 26, 2026

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The short answer

Stop the Water Flow

Your first move is to stop the water from spreading. If you have access to your own shutoff valve, turn it off to reduce the pressure. If the leak is from an upstairs unit, ask your neighbor to shut off their water supply or contact the building manager to do it. Every minute counts, so don't wait to see if it stops on its own.

Once the water is off, check for standing water and wet spots on your ceiling and walls. Place buckets or towels under active drips to catch water and prevent it from soaking into floors. If you can safely turn off electricity in affected rooms, do so to avoid any electrical hazards. This is a temporary measure until the pros can assess the situation.

Protect Your Belongings

Move furniture, electronics, and other valuables away from the wet area. Lift rugs and roll them up to keep them from absorbing moisture. If you have items on the floor, such as boxes or clothing, relocate them to a dry space. The longer they sit in water, the more likely they are to suffer permanent damage.

Take photos and videos of everything that is wet or damaged. This documentation is important for your insurance claim and for any discussions with your neighbor or landlord. Write down the time the leak started and what you did to respond. Keep a list of damaged items, including their approximate value, to help with the claims process later.

  • Move furniture away from wet walls and ceilings
  • Roll up area rugs and store them dry
  • Place plastic sheeting under electronics or appliances
  • Remove books, papers, and photos from low shelves
  • Use fans to circulate air and help dry surfaces
  • Save receipts for any supplies you buy for cleanup

Notify the Right People

Tell your upstairs neighbor about the leak as soon as you can, even if you suspect they caused it. They may not know about the problem and can take steps to stop it. Also inform your landlord or building manager, especially if you rent. They need to know about potential structural damage and may have their own procedures to follow.

If you own your unit, contact your insurance company to report the incident. Policies vary, and your insurer decides what is covered. Be honest about what you know and what you've documented. Your neighbor's insurance might also be involved, but that's their responsibility to handle. Keep records of all conversations and correspondence.

Call in the Water Damage Pros

Once the immediate danger is under control, contact the pros to assess the situation. They can identify hidden moisture in walls, ceilings, and floors that you might miss. Their work usually involves drying, cleaning, and sometimes removing damaged materials like drywall or insulation. Acting quickly reduces the risk of mold growth and secondary damage.

The pros will use specialized equipment to extract water and dehumidify the space. They can also determine if the leak has affected electrical systems or structural supports. In a climate with cold winters and warm, humid summers, moisture can linger and cause problems if not fully dried. Their assessment helps you understand the full scope of the damage.

  • Ask about their process for drying and cleaning
  • Request a written report of what they find
  • Inquire about mold prevention measures
  • Ask how long the drying process might take
  • Keep their contact information for follow-up

Handle Repairs and Cleanup

After the pros have dried and cleaned the area, you may need to repair or replace damaged materials. This could include drywall, insulation, flooring, or paint. The pros can guide you on what needs to be done, but they don't always do the repairs themselves. You might need a separate contractor for reconstruction, depending on the extent of the damage.

If you live in Newark, keep your shutoff valve location written down for future emergencies. Also, review your insurance policy to understand what is covered for water damage from a neighbor. Some policies cover this type of loss, but others may not. Be prepared for the possibility that you'll need to negotiate with your neighbor or their insurance for compensation, though that's not always necessary.

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Frequently asked questions

Who is responsible for the damage if the upstairs neighbor caused the leak?

Responsibility depends on the cause of the leak and your local laws. If the leak was due to negligence, the neighbor might be liable. However, your own insurance may cover the damage first, and they might seek reimbursement from the neighbor's insurer. Check your policy and consult with your insurance company.

Should I file a claim with my insurance company?

Yes, report the incident to your insurance company as soon as possible. They can assess the damage and tell you what your policy covers. Even if you're not sure who is at fault, filing a claim can protect your interests. Policies vary, and your insurer decides what is covered.

How can I prevent mold after a water leak?

Dry the affected area thoroughly within 24 to 48 hours. Use fans, dehumidifiers, and open windows if weather permits. Remove wet materials like carpet or drywall that can't be dried quickly. The pros can also apply antimicrobial treatments to prevent mold growth. See a doctor if you feel unwell from mold exposure.

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