Water Leak Between Units: Who Repairs It, Who Pays, and How the Claim Works

Water is coming through the ceiling of unit 304. The owner upstairs in 404 says she did nothing. The board president is on the phone with a plumber, the owner of 304 is photographing a ruined floor, and somebody has already used the word lawsuit.

Three separate questions are tangled together here: who stops the leak, who repairs what it broke, and who pays the insurance deductible. They have different answers, and they often land on different people.

Stop the water and document the cause before anyone argues about money

The first job is mitigation, not fault. Shut off the water to the affected line, get a plumber or mitigation vendor on site, and dry the materials out. EPA guidance on mold cleanup is blunt about why speed matters: "Fix plumbing leaks and other water problems as soon as possible. Dry all items completely." Mold damages what it grows on, and the longer it grows, the worse that gets.

While the vendor works, build the record you will need later:

• Photos and video of the damage in every affected unit, with dates.
• The plumber's written diagnosis naming the failed component and where it sits. "Supply line to the 404 kitchen sink, inside the wall" is useful. "Leak upstairs" is not.
• The emergency mitigation invoice, kept separate from the repair invoices.
• A note of who you notified and when.

Allocation follows the cause. If nobody wrote the cause down while the wall was open, you will be allocating from memory against an owner who remembers it differently.

Find out which component failed, then read the declaration

The failed component decides the allocation, and your governing documents decide what that component is. State condominium acts commonly set a default, then hand the question back to your declaration.

Virginia shows how that default reads. Under § 55.1-1955, unless the condominium instruments provide otherwise, the association is responsible for maintenance, repair and replacement of the common elements, and the owner for the unit. The same section carries the exception that matters most in a leak: where the work is needed because of a condition originating in or through the common elements, or from apparatus located within them, it falls to the association.

California states its default in Civil Code § 4775. The association repairs, replaces and maintains the common area, and each owner is responsible for their separate interest, unless the declaration says otherwise. The subdivision people misread is (a)(4): for exclusive use common area, the owner maintains it and the association repairs and replaces it. Different verbs, different bills.

California also added a rule that changes leak response directly. As amended effective January 1, 2025, § 4775(a)(2)(A) makes the association responsible for repairs necessary to restore interrupted gas, heat, water or electrical service that begins in the common area, even where the work extends into a separate interest, and subdivision (b)(1) gives the board 14 days from the interruption to commence that process. Note the two conditions, service actually interrupted and originating in the common area: a slow drip that stains a ceiling without cutting off anyone's water is a different problem.

Then comes the middle category that produces most of the arguments. A pipe serving one unit but sitting outside its boundary is often a limited common element, and its upkeep can land on the unit it serves. Virginia § 55.1-1964 specially assesses limited common element maintenance and repair expense against the unit it was assigned to, unless the instruments provide otherwise, splitting it equally where several units share it. This is why "it was inside the wall, so it is the association's" is usually wrong. Reading your declaration against the plumber's diagnosis is the whole exercise, and if the line between your declaration and your bylaws is fuzzy, the difference between those two documents is worth settling first.

The three way split that confuses everyone

A single leak produces three separate bills, and they rarely go to the same party.

1. The failed component. The pipe, valve or hose itself, allocated by your declaration and the statutory default above.
2. The resulting damage. Drywall, insulation, flooring, cabinets and paint in every unit the water reached. This usually runs through insurance, not the maintenance clause.
3. The deductible. The part the association's policy does not pay.

Keep those three on separate lines in every message you send. An owner told only that "the association is handling it" hears all three, then feels misled when the flooring invoice arrives in their name.

How the insurance claim actually works

For the resulting damage, the association's property policy is usually the first stop, and state law often dictates what it must cover. Florida is the most prescriptive example. Under § 718.111(11)(f), the association's policy covers the condominium property as originally installed but excludes the items within the unit boundaries that serve only that unit: floor, wall and ceiling coverings, electrical fixtures and appliances, water heaters and water filters, built-in cabinets and countertops, and window treatments. That property, the statute says, "is the responsibility of the unit owner."

That exclusion list is almost exactly what a water loss destroys. The structure is the association's problem; the flooring and cabinets are the owner's. If your board has never mapped where its policy stops and the owner's begins, what the master policy covers and where your HO-6 starts is the piece to settle before the next loss.

On the deductible, Florida § 718.111(11)(j) sets a default most boards do not expect. Property damaged by an insurable event is repaired by the association as a common expense, and all property insurance deductibles and damages exceeding the coverage are a common expense too. So the deductible spreads across every owner through the budget, including those whose units stayed dry.

Owners can insure that exposure: loss assessment coverage on a unit owner policy exists for exactly this moment, though the standard limit is often low next to a modern deductible and it responds only where the owner's own policy covers the underlying cause. The board cannot buy it for them, but it can say the exposure exists.

When the owner pays instead of the association

The main exception turns on conduct, not location. Florida § 718.111(11)(j) makes an owner responsible for costs insurance does not pay where the damage results from intentional conduct, negligence or failure to comply with the declaration, and extends that to damage caused by the owner's family, occupants, tenants, guests and invitees. The overflowing tub and the washing machine hose nobody replaced in fifteen years live here. A pipe that failed inside a wall without warning usually does not.

Two cautions. Negligence is a finding, not an assumption, and treating every upstairs owner as negligent by default is how boards end up in avoidable litigation. And costs can move where fault does not: California § 4775(c) puts the cost of temporary relocation during repairs the association is responsible for on the owner of the affected separate interest.

If the uninsured portion is large enough that the operating budget cannot absorb it, you are no longer handling a repair. You are looking at a special assessment and the approval rules attached to it.

A sequence your board can follow

1. Stop the water and start mitigation the same day, without waiting on fault.
2. Get the cause in writing from the vendor, naming the component and its location.
3. Match that component to your declaration and state default, then put the allocation in writing.
4. Report the loss to the association's carrier, and have affected owners claim on their own policies in parallel.
5. Tell owners in writing which of the three bills each will see.
6. Settle how the deductible is treated before an owner asks.
7. Log the failed component in your maintenance records.

That last step is the one boards skip. The supply hose that failed in 404 is the same hose, the same age, in every unit around it, and that fix belongs in the maintenance calendar your building already keeps instead of an email thread nobody will find next year.

One caveat. Virginia, California and Florida appear here because those statutes are public and specific, and they do not govern your building unless you are in those states. Your state statute and your governing documents control, and they can reallocate nearly everything above. Read both, and ask counsel before billing an owner.

What settles a leak dispute is usually the record: the photos, the vendor's diagnosis, who was notified and when, and what each owner was told. Noque keeps that trail in one place, with notices, documents and each unit's maintenance history next to the resident's own record, so your board is not rebuilding a timeline from phone screenshots a year later. If you want to see how that works in your building, talk to a specialist.