HOA and Condo Water Damage: Who Is Responsible in California?

Water in an attached home does not respect the boundary between what you own and what the association owns. It goes through the party wall, along the floor assembly, and into a neighbor's unit — and then three policies are potentially involved.

This is a practical orientation, not legal advice. Your CC&Rs govern, and they vary considerably between associations.

The three policies

The boundary between master policy and HO-6 is defined in your CC&Rs, and there are several common conventions.

Where the line usually falls

Associations generally use one of three approaches, and it is worth knowing which yours uses before you need to.

• Bare walls — the master policy covers the structure up to the unfinished interior surface. Everything inside, including drywall finishes, flooring, cabinets and fixtures, is the owner's.
• Single entity or original specification — the master covers the structure plus the fixtures as originally built, with the owner responsible for upgrades and improvements they made.
• All-in or all-inclusive — the master covers the structure plus fixtures and finishes inside the unit, leaving the owner mainly personal property and improvements.

How water actually moves in attached housing

Three routes, and each creates a different responsibility question.

Downward through the floor assembly. A supply failure in an upper unit releases into the assembly, spreads laterally, and comes through the ceiling of the unit below — often a room away from the source. That ceiling is frequently a common element while the finish is the owner's.

Horizontally through party walls. Water reaching the bottom plate of a shared wall wicks up the drywall on both sides. The neighbor who did nothing wrong gets a wet wall, and if nobody metered it, mold behind it six weeks later.

Through shared plumbing stacks. Multiple units feed a common vertical line, so a blockage low in the stack backs up into the lowest fixtures — which usually belong to someone with no connection to the cause. Stacks are almost always common elements.

Loss assessment coverage

This is the HO-6 provision most owners have never heard of and should check.

If a loss exceeds the master policy's limits, or the association has to pay a large deductible, the HOA may assess the cost across all owners. Loss assessment coverage on your HO-6 pays your share of that assessment.

Master policy deductibles on multi-unit buildings can be substantial, and where the CC&Rs allow it to be assessed to the owner whose unit caused the loss, that is a real exposure. Check whether you have loss assessment coverage and whether the limit is realistic.

What to do when it happens

1. Stop the water and make the unit safe
2. Notify the HOA or management company the same day — master policies typically have notification requirements, and late notice complicates coverage
3. Photograph everything before anything moves
4. Open a claim with your own carrier as well, even if you expect the master policy to respond
5. Get mitigation started; do not wait for the responsibility question to be settled
6. Ask the association to arrange access to adjacent and downstairs units for metering
7. Keep your own record of the timeline and every communication

Always check the neighboring units

This is the practical point that saves the most money and grief in attached housing.

On every multi-unit call we ask for access to the units below and either side, and meter them whether or not anyone has reported damage. It regularly finds moisture in a unit whose owner has noticed nothing.

On one townhome job, the owner on the far side of a party wall was skeptical — nothing was visible. Their wall read wet eleven feet from the source. We dried three units on one job, with no demolition in two of them, and nobody got a surprise in November.

In Downey specifically

The attached housing here is concentrated in the 1990s–2000s developments around Downey Landing and in the apartment and condominium stock along the Imperial Highway corridor.

The Downey Landing buildings are newer, which misleads people into thinking plumbing failure is a decade away. Building age and component age are different things — supply connectors, angle stops, and water heater flex lines have service lives measured in years and fail regardless of how new the building is. Braided stainless supply lines are a common culprit; replacing them every five to seven years costs very little.

Find out which convention applies to you

1. Read the insurance section of your CC&Rs and find out whether you are bare walls, original specification, or all-in
2. Confirm your HO-6 limits actually match that boundary, and that you have loss assessment coverage
3. Replace the supply connectors and angle stops in your unit if they are over seven years old or of unknown age

That last one is the cheapest insurance in this article. Most of the multi-unit losses we attend started with a part worth a few dollars.