LIABILITY
Upstairs Leak: Who's Actually Responsible?
Quick answer
Per published Buildings Department guidance, seepage is often caused by defective building structure or fittings, or a lack of proper maintenance — both owners and occupants have a duty to cooperate in resolving it. In principle, whichever flat the source is in, that flat's owner is responsible for arranging the repair; if the source is in common property (shared pipework, an external wall), it falls to the owners' corporation or property management company. Real cases are often disputed — identifying the source is usually the central point of contention, which is exactly why leak detection and surveyor report services exist. If you're pursuing a financial claim, the Small Claims Tribunal is one option, and the Community Legal Information Centre (CLIC) offers free initial legal advice.
The general liability boundary
- Source inside the upstairs flat itself (e.g. a failed bathroom membrane) — generally that flat's owner is responsible for the repair and associated cost.
- Source in common property (e.g. a shared drainage pipe, external wall structure) — generally falls to the owners' corporation or management company.
- Both owners and occupants/tenants have a duty to cooperate with investigation, including allowing access for the Joint Office or a commissioned professional.
- Buildings Department's enforcement ladder: a Nuisance Abatement Notice (fine up to HK$25,000 plus HK$450/day); non-compliance can escalate to a court order (fine up to HK$50,000 plus HK$600/day).
Why identifying the source matters so much
The answer to 'who's responsible' depends heavily on 'where the source is' — and identifying the source is itself the central dispute in most upstairs-leak conflicts. If the Joint Office has stopped investigating, or a neighbour disputes its finding, an independent leak-detection report or expert surveyor report is the key evidence for moving the dispute forward.
Legal routes
If you're pursuing a financial claim (renovation damage, lost rent), the Small Claims Tribunal is one avenue. We are not legal representatives — for legal advice, we recommend contacting the Community Legal Information Centre (CLIC), which offers free initial consultations.
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Frequently asked questions
What if the owner upstairs refuses to deal with it?
You can file a complaint with the Joint Office via 1823 while keeping an independent detection report as evidence. If negotiation doesn't work, the Small Claims Tribunal is one option, or seek advice from CLIC.
What role does the owners' corporation play?
If the seepage source involves common property (shared pipework, external wall structure), the owners' corporation or property management company is usually responsible for arranging investigation and repair. Individual buildings' Deeds of Mutual Covenant may set out more specific responsibility terms.