Real Cases: How Hong Kong Courts Decided Water Leakage Disputes
Published: 2026-07-08
About these case summaries: the summaries below were prepared by this site based on our own reading and understanding of the judgments. They are not legal advice, have no legal effect, and must not be cited as authority. Cases are identified by neutral citation only, without party names; read the original judgments via the HKLII links. Past outcomes turned on their specific facts and do not indicate the outcome of any other case. Our full verification process for case content — full-text reading of every judgment, corrigendum checks and independent human review — is set out in our methodology .
A hypothetical scenario
Imagine a flat owner who notices a spreading damp patch on the master-bedroom ceiling; mould follows. The upstairs owner insists their flat is bone dry — "sue me, then." The management office and the Joint Office (FEHD/Buildings Department) don't resolve it. What does the road ahead look like — can such a claim succeed, and what have courts actually awarded? Six real judgments show the patterns.
Pattern 1: cases turned on proving the source, not the existence, of the leak
In these decided cases, the battleground was almost never whether water was coming in — it was whether the source was the defendant's flat:
- In [2021] HKDC 766 (District Court, 2021), the court accepted a decisive on-site water test: dripping accelerated when the upstairs taps and toilet were run. The upstairs owner was held liable in nuisance and negligence, and the court awarded HK$29,400 repairs plus HK$30,000 general damages — HK$59,400 in total ( judgment ).
- By contrast, in [2022] HKDC 671 (District Court, 2022), repeated dye tests all came back negative; the court observed that a series of negative tests may itself be evidence against the alleged seepage path, and the claim was dismissed entirely ( judgment ).
In these cases, the quality of the scientific evidence decided the outcome — "my ceiling is wet and you live upstairs" was not enough.
Pattern 2: the weight of expert evidence
- In [2022] HKDC 959 (District Court, 2022), a dye test by the Joint Office's appointed consultant established failed waterproofing in the upstairs master bathroom; liability was effectively undisputed, and the court awarded HK$348,242, including lost rental of HK$291,742, HK$41,000 repairs and HK$15,500 agency fees ( judgment ).
- In [2023] HKDC 1117 (District Court, 2023), a battle of experts deployed electrical conductivity tests, infrared imaging, microwave scans, water-sample analysis and ponding tests; the court preferred the plaintiff's expert ( judgment ).
- Strong evidence did not guarantee speed: in [2023] HKDC 309 (District Court, 2023), despite multiple surveyors pinpointing the upstairs bathroom slab (fluorescent dye, moisture readings, microwave tomography) and the defendant's two convictions for failing to comply with a nuisance notice, the court refused summary judgment — whether the seepage had stopped after renovation was a triable issue ( judgment ).
Pattern 3: when the source is a common part, the respondent is the incorporated owners
In [2023] HKLdT 15 (Lands Tribunal, 2023), experts compared external-wall moisture on rainy versus dry days and established that the building's external wall — a common part — was at least one source; the incorporated owners were liable under the Building Management Ordinance for failing to maintain common parts, and were ordered to pay HK$83,330.60 with interest ( judgment ). Such cases run in the Lands Tribunal's building management list — official average waiting time 34 days in 2024 (target 90): see official waiting times .
The range of outcomes in these six cases
| Case | Court / year | Outcome |
|---|---|---|
| [2021] HKDC 766 | District Court, 2021 | HK$59,400 awarded (repairs + general damages) |
| [2022] HKDC 671 | District Court, 2022 | Claim dismissed (source not proved) |
| [2022] HKDC 959 | District Court, 2022 | HK$348,242 awarded (incl. lost rental) |
| [2023] HKDC 309 | District Court, 2023 | Summary judgment refused; full trial required |
| [2023] HKDC 1117 | District Court, 2023 | Plaintiff's expert preferred; claims incl. HK$143,884 rectification |
| [2023] HKLdT 15 | Lands Tribunal, 2023 | Incorporated owners ordered to pay HK$83,330.60 (common part) |
Reminder: these are the actual outcomes of these six cases; the spread reflects the scope of loss (e.g. lost rental) and evidence quality, and does not indicate the likely outcome of any other case.
Where to start procedurally
- Seepage losses of HK$75,000 or less can go to the Small Claims Tribunal — full procedure and post-judgment enforcement in the Small Claims playbook ; filing fees HK$20–120 in the fees guide .
- Larger or injunction-seeking claims generally run in the District Court (as most cases above did).
- Common-part sources point to the Lands Tribunal's building management jurisdiction.
- The free first step: a Joint Office (FEHD/BD) investigation.