Slab Leak in a Condo or Co-op: Who Fixes the Pipe and Who Pays for the Floor

The Short Answer

A slab leak is usually the association’s repair, but the floor on top of it is usually yours. A slab leak is really three bills, and they often land on different people.

Why the pipe is usually not yours: a pipe buried in or under the slab sits outside the unit, in the common area, and it usually connects to the building’s shared lines. A California Court of Appeal held exactly that for a sewer pipe two feet under a Newport Beach condo’s slab. The association had billed the owner about $15,000 to cut through his floor, jackhammer the slab and replace about 50 feet of pipe. The court said the pipe was “a genuine common area to be maintained and repaired by the association,” because “interconnected sewer pipes cannot really be said to be the ‘fixtures’ of any particular unit” (Dover Village Assn. v. Jennison (2010) 191 Cal.App.4th 123). The owner kept the judgment and about $17,000 in fees and costs.

Our guide to plumbing leaks has the full table of which pipes are usually shared, including risers. This page covers what is different when the pipe is under concrete.

Condo vs Co-op: Which Document Decides

In a condo, you own your unit and share the common elements with the other owners. The declaration (CC&Rs) draws the line, usually at the unfinished surface of the floor. The slab and anything buried in it are usually common elements. Look in the declaration for the unit boundaries and maintenance sections, and any exhibit or chart that lists who maintains what.

In a co-op, the corporation owns the whole building, slab and pipes included. You own shares or a membership and a lease or occupancy agreement that lets you live in your apartment. That lease decides who repairs what. Look for the repairs article. Most co-op leases make the corporation responsible for everything except a short list of items the member keeps up (decorating, appliances, alterations, damage the member caused). A pipe in the slab is rarely on the member’s list.

In California, both are covered by the same law. The Davis-Stirling Act applies to condominiums and to stock cooperatives (Civ. Code 4100), so its default maintenance rules below apply to a co-op unless its governing documents say otherwise.

Laguna Woods Village: What the Mutuals’ Own Documents Say

Laguna Woods Village has both types. United Laguna Woods Mutual is a co-op: its occupancy agreement says the corporation “owns and operates a cooperative housing project.” Third Laguna Hills Mutual is a condominium governed by CC&Rs.

Third Mutual (condo). Its Damage Restoration Policy (Resolution 03-26-154, adopted September 15, 2026) lists “Leaks below slab when not caused by Member or Alteration” and “Leaks located within walls or beneath floors when not caused by a Member or Alteration” among the items the Mutual restores (Third Damage Restoration Policy, Section 4.1). The same policy says:

• The Mutual does the work. “Members are not allowed to restore Mutual-controlled property” (Section 4(b)). Report the leak to Resident Services at 949-597-4600 right away (Section 3.2). Late reporting can make you responsible for the extra damage (Sections 3.2 and 5.4).
• Your floor is yours. The unit includes “carpet and floor coverings” and other interior property “above the sub-floor” (Section 2.5). The Member “is always responsible” for interior damage, personal property and all alterations (Section 5(a)).
• Upgrades cost you twice. “A Member bears all costs for removing, altering, protecting or replacing any alteration for the Mutual to inspect, repair or replace” Mutual property (Section 5.2). If you installed tile over the slab, you pay to take it up and put it back.
• Walls get painted. Where the Mutual opens walls for a leak it is responsible for, it paints the repaired areas; you supply matching paint if needed (Section 4.1(c)).
• You pay for the hotel. If the manor is unlivable during the work, you pay for temporary housing and meals, and you keep paying monthly assessments (Section 7(b)).
• If you caused it, the board holds a hearing before it charges you (Section 6.3), and you may owe all the Mutual’s costs up to its $100,000 deductible, and its insurer may seek more (Section 7).

United Mutual (co-op). We did not find a slab-leak policy as specific as Third’s. Its occupancy agreement says the corporation “shall provide and pay for all necessary repairs, maintenance and replacements” except the member’s list: damage from the member’s own negligence or misuse, interior redecoration, air conditioners, appliances, alterations, and items listed in the Mutual’s “Summary of Chargeable Maintenance Services” (United Occupancy Agreement, Article 11). A slab pipe is not on that list, but ask Resident Services for the current chargeable-services summary to confirm. Article 11(b) also says the corporation pays for “unaltered kitchen and bath floors and countertops.” Original floors there are United’s to restore. United’s insurance disclosure says members are responsible for damage to upgrades, including “wood or other upgraded floor coverings,” from “a plumbing failure in your manor or an adjacent manor” (United Annual Insurance Disclosure, October 2026). United also supplies interior water as part of the monthly carrying charges (Article 10), so you will not see a high water bill as a warning sign.

Both Mutuals’ master policies carry a $100,000 per-occurrence deductible (Third and United disclosures, October 2026). Most slab leaks cost less than that, so the Mutual pays its share from its own funds and your HO-6 covers yours. The Village’s service completion times estimate about 90 business days for “MI Event – Plumbing Leaks – Under Slab” (a guideline, not a deadline).

Who Finds the Leak

You usually notice it first. The association usually confirms it.

Common signs: a damp or wet spot on the floor, a warm spot if a hot water line is leaking, and the sound of water trickling where it should not (Rogers Water Utilities, leak self-audit). If your unit has its own meter, read it before and after a two-hour period when no water is used. If it changes at all, you probably have a leak (EPA WaterSense, Fix a Leak Week).

Then:

1. Report it in writing to the association or co-op the same day. Say where, what you see, and when it started.
2. Let the association send its plumber. Most declarations and leases give the association the right to enter for repairs. In a building with shared lines, it usually orders the leak detection, because the pipe is most likely its own.
3. Do not hire someone to break the slab yourself. The slab is common area. Cutting it without approval can make you pay for the damage.
4. Call your HO-6 insurer to open a claim for your floors and belongings, even if you think the association pays.
5. Ask for the plumber’s written finding: which pipe, what it serves, where it connects, and why it failed.

Who pays for leak detection usually follows the pipe. If the leak turns out to be in a common pipe, it is an association cost. If it turns out to be your fixture or your alteration, many declarations let the association charge you its costs. Third Mutual’s policy says so in Sections 5(b), 6.3 and 7.

Who Pays to Open the Floor and Fix the Damage

Breaking and patching the slab goes with the pipe. If the association owns the pipe, it pays to cut the concrete and pour it back.

Everything on top of the slab is usually yours: tile, wood, carpet, baseboards, any cabinets or appliances that must be moved, and the cost of putting them back. Your HO-6 is the usual source of money. Ask your insurer two questions: does the policy pay to remove and replace the flooring to reach the pipe, and does it cover damage from a leak that went on for a while before you saw it. Some policies limit both. See what HO-6 insurance covers. In a wood-frame building, see who pays for the subfloor.

When the master policy pays interiors. Some master policies insure the unit as originally built, or more. If the damage is over the master policy deductible, that policy may pay to restore original finishes. Our guide to walls-in master policies explains the types.

Damage to the unit next door or below (a slab leak can travel under walls) follows the same split: the association fixes common parts, each owner fixes their own finishes, and an owner who caused the leak may owe for the rest. See leaks into the unit below.

Spot Repair, Reroute or Lining: Who Chooses

There are three common ways to fix a slab leak, and each one damages a different part of the unit.

Laguna Woods Village has run a lining program on sewer pipes. The Village says lining works “with up to 60% pipe remaining,” and when it cannot be done the pipe is replaced with prelined pipe (Real Estate Forum answers, July 19, 2023).

Who chooses: the party responsible for the pipe, which is usually the association. The board picks the plumber and the method. You cannot usually force a reroute, and in Third Mutual you cannot do the work yourself (Section 4(b)). You can ask in writing. A reroute often means less damage to an expensive floor, and it removes the risk of the same line leaking again under your floor. If the board prefers a spot repair for cost, you can offer to pay the difference.

Why the method matters to you: the split of finishes often differs between floors and walls. In Third Mutual, for example, floor coverings are the member’s, while unaltered drywall is Mutual-controlled property and the Mutual paints walls it opens (Sections 2.5, 2.6 and 4.1(c)). There, a spot repair puts more of the cost on your floor, and a reroute may put more on the Mutual, though the paint promise in 4.1(c) covers only moisture intrusion events the Mutual is responsible for. Read your boundary and maintenance sections before you agree to a method.

More than one leak? Repeated slab leaks in one building usually mean the pipes are near the end of their life. That is a reserve and repiping question for the board. See our guide to structural repairs and special assessments.

What State Law Says

Your declaration or lease decides most of this. State law sets the defaults.

California. Unless the declaration says otherwise, the association repairs, replaces and maintains the common area, and each owner maintains their separate interest (Civ. Code 4775(a)(1) and (3)). Since 2025, unless the declaration says otherwise or a utility is responsible, the association must also make the repairs needed to restore interrupted water service that begins in the common area “even if the matter extends into a separate interest” (4775(a)(2)(A)). The board must start that process within 14 days of the interruption (4775(b)(1)). The owner pays temporary relocation during association repairs (4775(c)). If the board wants to charge you for common area damage you or your tenant caused, it must give you written notice at least 10 days before a hearing and let you speak (Civ. Code 5855). See California condo law.

Florida. “Maintenance of the common elements is the responsibility of the association, except for any maintenance responsibility for limited common elements assigned to the unit owner by the declaration” (Fla. Stat. 718.113(1)). A slab leak from old pipe is often not an insurable event. In that case the declaration’s maintenance provisions decide who repairs it. If it is an insured loss, the association repairs its insured property as a common expense, including the deductible, unless an owner’s negligence or rule violation caused it (Fla. Stat. 718.111(11)(j)). Floor coverings inside the unit are the owner’s to insure (718.111(11)(f)3). See Florida condo law.

Washington. Common expenses are shared by all units. Unless the declaration assigns a limited common element’s costs to its unit (RCW 64.90.480(4)), the association can charge one unit for damage only if it was caused by that owner’s willful misconduct or gross negligence, by breaking a maintenance standard that warns owners they may be liable, or by ordinary negligence if the declaration says so (RCW 64.90.480(6)). It must give notice and a hearing first (480(7)). See Washington condo law.

Other states: check your state condo law page.

If the Association Says the Slab Leak Is Yours

1. Ask which clause. Get the section of the declaration or lease that makes that pipe yours. “It serves only your unit” is often not enough. Dover Village rejected that argument for an interconnected sewer line.
2. Ask for the plumber’s report showing where the leak is and what the pipe connects to.
3. In California, ask about 4775(a)(2). If water service was interrupted and the failure began in the common area, the association is responsible unless the declaration says otherwise.
4. Ask for a hearing before any charge for damage to common area, and attend it.
5. Put it in writing. Our repair dispute process and letter to the HOA to repair leak damage have the steps and wording.

Frequently Asked Questions

Whose responsibility is it to fix a slab leak at a co-op?

Usually the co-op corporation's. It owns the building, including the slab and the pipes in it, and most proprietary leases or occupancy agreements make it responsible for every repair except a short list kept by the member (decorating, appliances, alterations, damage the member caused). You usually still pay for your own upgraded flooring and belongings. Read the repairs article of your lease.

Who pays for a slab leak in a condo, the HOA or the owner?

Usually the HOA pays to find the leak, break the slab, fix the pipe and patch the concrete, because pipes in or under the slab are common elements. The owner usually pays for floor coverings, upgrades, belongings and any hotel stay. The owner pays for the pipe only if the declaration assigns it to the unit or the owner caused the leak.

Who is responsible for a slab leak at Laguna Woods Village?

In Third Laguna Hills Mutual, the Mutual restores leaks below the slab that were not caused by a member or an alteration, and members may not do that work themselves (Damage Restoration Policy, Resolution 03-26-154). Members pay for floor coverings, alterations, belongings and temporary housing. In United Laguna Woods Mutual, a co-op, the occupancy agreement makes the corporation pay for repairs not on the member's list. Report the leak to Resident Services at 949-597-4600.

Who pays to replace my floor after a slab leak repair?

Usually you or your HO-6 insurer, because floor coverings are part of the unit or are owner improvements in most declarations. The association usually pays only to patch the concrete. If your master policy covers interiors and the loss is over its deductible, it may pay for original finishes.

Can I make the HOA reroute the pipe instead of breaking my floor?

Usually not. The party responsible for the pipe, usually the association, chooses the method. You can ask in writing for a reroute, explain the damage a spot repair would do to your floor, and offer to pay any difference in cost.

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Important Disclaimer: This article describes common patterns and quotes state law as of November 2026. It is general educational information, not legal advice. Every declaration is different, and state law varies. Always read your own governing documents, and talk to your association’s manager or a qualified community association attorney about your situation.

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