Toilet Leaking to the Unit Downstairs: Who Pays in a Malaysian Condo?
In Malaysian strata properties, a leak from an upstairs toilet into the unit below is generally treated as an inter-floor leak between the two owners, with the JMB or MC helping to inspect and determine the cause. If the source is inside the upper parcel, its owner usually bears the repair. This is general information, not legal advice.
A quick note before we start
This article explains general principles under the Strata Management Act 2013 and its regulations as they are commonly understood. It is not legal advice. The exact wording, timelines and procedures can change and depend on your development's by-laws. For a dispute, speak to your management office, check the current regulations, or consult a lawyer.
How to tell it is a toilet leak
Inter-floor leaks from bathrooms look different from roof leaks. The stain sits under the upstairs bathroom, often near where the floor trap or toilet bowl is. It does not depend on the weather. It may get worse in the morning and evening when the family upstairs showers. If your ceiling stays wet on dry, sunny days, a bathroom or pipe above is far more likely than the roof.
- Stain directly under the upstairs bathroom layout.
- Wet even during dry weather.
- Worse after peak shower times.
- Sometimes a faint soapy or sewage smell.
- Damp on the ceiling near a vertical pipe shaft.
General principles on who is responsible
Under the Strata Management Act 2013, common property is maintained by the JMB or MC, while each owner is responsible for what lies within their own parcel. For leaks between floors, the regulations made under the Act set out an inter-floor leakage process. In broad terms, the management body can be asked to inspect and determine the cause, and the floor-ceiling between two parcels is commonly treated as shared, with the upper unit generally presumed to be the source unless shown otherwise. Check the current regulations for the exact rules.
| Where the leak starts | General position | Who usually arranges repair |
|---|---|---|
| Waterproofing, floor trap or pipes inside the upper unit's bathroom | Within the upper parcel | Upper unit owner |
| Common vertical stack pipe or riser serving several units | Common property | JMB / MC |
| Main roof or common drain above a top-floor unit | Common property | JMB / MC |
| Your own bathroom or pipes | Within your parcel | You |
| Cause disputed or unclear | Management body inspection, then Strata Management Tribunal if unresolved | Depends on findings |
Step-by-step: what to do if the toilet above is leaking
- Take dated photos and videos of the stain, drip and any damage.
- Speak politely to your upstairs neighbour first. Many cases are solved quickly when both sides see the evidence.
- Report the leak in writing to the management office, attaching photos, and ask for an inspection to determine the cause.
- Keep copies of all messages, letters and the inspection findings.
- Once the cause is known, the responsible party arranges repair. The ceiling below is repaired after the source is fixed.
- If you cannot agree, the Strata Management Tribunal is the usual route for strata disputes. Ask the management office or a lawyer about the current process.
Why the fix happens upstairs, not on your ceiling
Sealing your ceiling does nothing to stop water entering from above. In most cases the problem is a failed waterproofing layer under the bathroom tiles, a cracked or poorly sealed floor trap, or a leaking concealed pipe. Patch injections from below or grouting the tiles above may slow it down for a while, but a reliable repair usually means hacking the tiles, renewing the waterproofing membrane with proper upturns at walls and around the floor trap, a flood test, and re-tiling.
Indicative bathroom waterproofing cost
The indicative 2026 range below applies to a full re-do of one bathroom. The exact price is confirmed after the free inspection, based on bathroom size, tile choice, access and pipe condition.
| Job | Indicative range (RM) | Warranty |
|---|---|---|
| Toilet / bathroom waterproofing re-do (incl. hacking and re-tiling) | RM2,500 - RM6,000 per bathroom | 5 years |
| Wall crack PU injection (if water tracks through a wall) | RM25 - RM60 per linear ft | 2 years |
| Ceiling repair in the unit below | Quoted after inspection | - |
Tips to keep the peace with your neighbour
Start with evidence rather than blame. Offer to share the inspection report. Agree on access dates in writing, since bathroom works usually take several days and the upstairs family will lose use of that bathroom for a period. A written warranty from the contractor protects both units if the leak returns.
Get an independent inspection
Whether you are the upstairs or downstairs owner, a clear inspection report helps everyone. Our CIDB-registered installation partner can inspect the bathroom and the ceiling below, explain the cause and quote on the spot. See toilet and bathroom waterproofing and ceiling leak repair, then book a free inspection.
Frequently asked questions
Who pays when the upstairs toilet leaks into my ceiling?
Generally, if the leak comes from the waterproofing, floor trap or pipes inside the upper unit, that owner pays to fix the source and the resulting damage below. If it comes from a common pipe or stack, the JMB or MC is generally responsible. This is general information only, so confirm with management or a lawyer.
Does the JMB or MC have to inspect an inter-floor leak?
The regulations under the Strata Management Act 2013 include an inter-floor leakage process where the management body can be asked to inspect and determine the cause. Report the leak in writing with photos. Ask your management office about the current procedure and timelines that apply to your development.
What if my upstairs neighbour refuses to fix the leak?
Keep written records, report to the management office and ask for a formal inspection finding. If the dispute remains unresolved, the Strata Management Tribunal handles many strata disputes. A lawyer can advise on your specific case. An independent inspection report from a waterproofing specialist strengthens your position.
How much does it cost to waterproof a leaking bathroom?
A full bathroom waterproofing re-do, including hacking and re-tiling, is indicatively RM2,500 to RM6,000 per bathroom in 2026, with a five-year warranty. The exact price is confirmed after the free inspection, depending on bathroom size, tiles, access and the condition of pipes.
Can a toilet leak be fixed without hacking tiles?
Small defects like a loose floor trap seal or cracked grout can sometimes be treated without hacking. However, when the waterproofing layer under the tiles has failed, hacking and redoing the membrane is the reliable fix. The technician will tell you which applies after testing.