How to Use the HOA Water Leak Damage Cost Calculator
In Korea, there's a widely followed custom where the unit above generally covers leak damage to the unit below. The US doesn't have one uniform rule like that. In a condo or co-op, who pays for leak damage depends on your HOA's governing documents — whether the cause is a unit owner's plumbing (a unit-owner responsibility) or a shared pipe within the walls (often a common element the HOA's master policy covers) — and on which insurance carrier ultimately accepts fault. This calculator estimates a cost split once responsibility has been worked out, using the damage items you enter and an assumed fault share for the upstairs unit.
In practice, most claims move faster than a fault investigation would allow because your own homeowners or condo (HO-6) insurance typically pays for your unit's damage first, so repairs aren't held up while blame gets sorted out. If the upstairs owner (or their insurer) is later found responsible, your insurance company can pursue subrogation — recovering what it paid out directly from the other party's insurer — which keeps you out of that negotiation.
Because there's no single national rule, the exact process always comes back to two documents: your HOA's CC&Rs (covenants, conditions & restrictions) for who's responsible for what, and each unit's insurance policy for how a claim gets paid and recovered. This calculator gives a starting estimate for the dollar split once those questions are answered — it isn't a substitute for reading your HOA documents or talking to your insurance adjuster.
Frequently Asked Questions
No — unlike Korea, where custom generally holds the upstairs unit responsible, the US has no single automatic rule. Your condo or co-op's HOA governing documents decide whether the leak is a unit-owner responsibility or a common-element issue the HOA's master policy covers, and fault still has to be established.
Typically your own homeowners or condo insurance pays for your damage first so repairs aren't delayed. If the upstairs unit is later found at fault, your insurer can then pursue subrogation — seeking reimbursement from the upstairs owner's insurance — without you having to negotiate that recovery yourself.