If dampness or water penetration appears on the interior ceiling of a condo unit, BCA explains that the defect is presumed to be in the unit immediately above unless evidence shows otherwise. The upper and lower owners should jointly investigate. The inspection can establish whether a defect in a unit or a common property problem needs to be repaired.
Notify your managing agent or management corporation strata title (MCST) and, if you rent, your landlord. Keep photos, times and reports. A pipe serving several units or a roof can be common property, in which case the management corporation is responsible for its repair. If water is near electrical fittings or a ceiling looks unsafe, keep clear and alert management promptly.
- Report the location and record how the leak changes.
- Arrange an investigation with the upstairs owner and management as appropriate.
- Use the findings and strata records to agree on repairs and costs.
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Chapters 1–3
Describe what you can observe safely
Write down when you first noticed the water, where it appears and whether it is active. If safe, photograph the ceiling from a position that gives context. Include a wide view that identifies the room and a closer view of the affected area. Note if the stain grows after rain or changes during the day. Keep a record of observations without inferring a source from timing alone.
If water is close to electrical fittings, or if the ceiling appears damaged or unstable, keep people clear and contact management for prompt assistance. Do not open fittings, pull down ceiling panels or climb to inspect a damaged area. Let qualified people assess any electrical or building risk. If you are a tenant, notify the landlord or authorised contact so that the owner can coordinate with management and the owner upstairs.
Keep reports tied to dates
Give management the unit number, room and any relevant history. If the stain has appeared before, send the previous work report and the date it returned. Describe urgent symptoms separately from general discolouration. Ask for a case contact and the next step. This makes it easier to coordinate access if more than one household needs to be present.
For a rental, keep the tenant, landlord and management informed of the same observed facts through the agreed channels. The tenancy agreement may say who can book a contractor or give permission for work. That allocation is separate from the question of which owner or body is responsible for a defect in the building.
Give management a report it can act on
A message saying there is a stain in the flat may require several follow-up calls. Include the unit, room and approximate location relative to a fixture or wall, along with when it first appeared. Indicate whether the water is active and whether there is a safety concern. Ask whether management can coordinate access to the relevant areas or advise which owner or contractor should attend.
Use a simple timeline when the issue is intermittent. For example, note when rain occurred, when dampness was noticed and when the spot began to dry. Give those facts to the investigator without drawing a conclusion from timing alone. If a photograph was taken the next day, label it with the correct date and time. Ask management to confirm receipt and give an expected time for an update.
If a tenant reports the leak when the landlord is away, agree who can attend and let the tenant know how to report a worsening problem. Confirm the managing agent’s emergency contact and the normal case contact. Keep a record of who authorised each visit so the tenant can arrange access with confidence.
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Start with the unit directly above
BCA’s water seepage guide explains the rebuttable presumption for dampness, moisture or water penetration on the interior ceiling of a strata lot. The defect is presumed to be in the lot immediately above unless evidence shows otherwise. Use that as the starting point for a joint investigation. A stain or dripping point does not by itself establish exactly which pipe, waterproofing layer or other element failed.
An upstairs bathroom may sit over the affected ceiling. An inspection can check whether the water originates in the upstairs unit or elsewhere and travels before it becomes visible. Give the investigator access to the relevant records, including any earlier repairs. Ask what evidence supports the conclusion and whether another source still needs to be ruled out.
Include common property in the investigation where relevant
BCA describes common-property roof, wall and pipe examples. A pipe serving multiple units can be common property if it falls within that classification. A pipe serving one unit is treated differently in the guide. Check the actual component and any relevant strata records with management. An element can be physically near a private room and still be part of a shared system.
If the unit is on the top floor, tell management whether the seepage appears under a roof, terrace or external wall. Ask it to confirm the boundaries and the likely line of investigation. If a building element is common property, the management corporation has the duty to maintain it. Keep the source finding and the property classification together when discussing repairs.
| Possible source | Who should be involved |
|---|---|
| Defect in the immediately upper unit | Owners of both units, with management helping to coordinate |
| Pipe that serves only one unit | Owner of the unit it serves, after the source is verified |
| Common-property pipe, roof or external wall | Management corporation, with affected owners reporting and providing access as arranged |
| Source unclear | Management and relevant owners arrange an investigation |
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Agree access and a scope in advance
Ask management to coordinate with the affected owners where needed. Give the investigator the locations upstairs and downstairs, the timing of the leak and any photographs taken during active seepage. Confirm what each party is agreeing to. A visual inspection, diagnostic test and invasive opening can have different implications for access, price and reinstatement.
Ask whether both units need to be available at the same time. Agree who will be present and who will share the written findings. If a tenant is in either unit, work through the landlord and the agreed access arrangements. Keep access times in writing and update the other parties if an appointment changes.
Ask the investigator to explain the finding
Request a description of the observed defect, evidence and any limits on the inspection. If the professional recommends further investigation, ask what it is intended to establish and who should authorise it. A finding that a surface is wet does not identify the component that needs repair. Ask for a proposed repair scope only after the findings are clear enough to guide it.
For example, a contractor may see a stain under an upstairs bathroom but need a separate check to distinguish a pipe issue from failed waterproofing. The owners can agree to share the report and decide on the next step once it is available. Keep each quote tied to the component it addresses, and avoid approving overlapping work while the source is still being assessed.
Ask for a report that distinguishes observations from conclusions
An investigator might identify an active drip but need another visit to establish its source. Ask the report to state what was checked, where access was available and what remains uncertain. A good description identifies the location and component and explains the observed evidence. If the report suggests checking a shared pipe or external wall, give management the written finding so it can check the relevant records.
For example, a visual check in the lower unit may show a stain near a bathroom ceiling corner. The upper owner can make their bathroom available at the agreed time. If the investigator cannot yet distinguish a lot defect from a common-property pipe, ask what the proposed next assessment would clarify. Confirm the scope, access and cost before authorising it. Ask which areas will need to be reinstated if anything is opened.
Share the same report with the people who need it, subject to the agreed arrangements and privacy requirements. Give them a date to respond on the next action. If the first contractor’s recommendation differs from a later report, compare which parts each person inspected and which evidence each had available. Ask the parties to resolve that difference before committing to work on a suspected component.
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Ask where the defect sits
If the source is inside a lot, BCA’s guide says the owner of that lot is responsible for repair. For inter-floor seepage it says the upper and lower owners should investigate together and decide on their respective shares of repair costs. If the source is common property, management should address the shared component. Ask the parties to record the conclusion and what they have agreed about access, scope and cost.
A pipe that serves one lot may need work from a room below it. The access route and responsibility can be separate questions. Ask which owner or body will engage the contractor, who can approve changes to the scope and who is responsible for restoring finishes affected by access. Clarify these points in writing before construction begins where possible.
Identify the work that will prevent recurrence
Ask the professional to distinguish the repair to the source from drying, ceiling reinstatement or painting. Agree the order in which those tasks take place. If the parties plan to repaint only after confirming the leak has stopped, record who will check and what evidence they will use. Finishing the surface too early can make a recurrence harder to identify.
If the source is a shared element, ask management for the next expected update and any temporary arrangements. If it is a private lot defect, ask the owner and contractor who will inform neighbours when access or water use may be affected. Use the management office’s procedures for work access and the protection of common areas.
Check an upstairs renovation against the inspection findings
An upstairs renovation may have finished shortly before the first stain appears. Give the investigator those dates and any available scope documents. The timing is relevant to the enquiry. Ask what physical evidence connects the proposed source with the affected ceiling, and whether shared elements have been checked where appropriate. If a contractor has a warranty or needs notice, ask the responsible owner how the notice will be handled.
Avoid booking reinstatement from photographs alone. The affected owner can ask for the proposed repair and how both units will be checked afterward. If a test requires access to both units, coordinate the appointment through the relevant owners and management. Put any temporary access restrictions and repair dates in writing. If the leak returns after the work, compare the new observations with the earlier report before deciding whether it is the same issue.
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Put inspection, repair and reinstatement on separate lines
Ask for an itemised scope showing what the contractor will inspect, repair and restore. This is helpful if one party pays for the investigation while another arranges the repair. Before accepting additional work, ask how the contractor will communicate new findings and who must authorise a variation. An invoice that names only the building and a lump sum is difficult to reconcile later.
Check whether an insurance policy or tenancy agreement requires early notice or particular evidence. Ask the insurer what is covered and what it needs before you incur costs. Record the insurer’s instructions and keep the contractor’s findings. A report that supports the repair decision can also help explain damage to fittings or contents. The insurance decision and the repair responsibility should each be confirmed.
Verify when the leak has stopped
At handover, ask what was repaired, what checks were made and what signs to watch for. Record the date and compare with the earlier photographs. If the work has a warranty, ask what it covers and whom to contact if dampness returns. Keep receipts and handover notes with the investigation report so that a later visit can start from the actual work history.
Work through a leak that has two separate cost questions
Imagine the inspection identifies a leak in a common-property pipe and the lower unit has water damage to a cabinet and ceiling paint. Ask management about repairing the pipe and expected access. Then ask who will assess the damage inside the unit and what any insurer needs. The common-property repair, reinstating finishes and a claim for damaged contents can involve different decisions and documents.
Ask for the planned sequence in writing. If a ceiling area must remain open for checks, agree how it will be protected and when it will be safe for occupants to use the room. Record who will coordinate reinstatement after the source is repaired. If someone plans to claim against insurance, check the notice and evidence requirements before disposing of damaged items where it is safe to retain them.
A tenant should also ask the landlord about any temporary arrangements for using the property. Keep the messages about access and repairs separate from any agreement about rent or other tenancy terms. If a practical arrangement changes, send the latest version to the people who must act on it. The repair report can then be matched to the date each decision was taken.
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State the open question
A disagreement may concern the source, access, proposed work or how costs will be shared. Identify which question remains and what evidence could answer it. Send a short chronology with the photos, professional findings and earlier correspondence. Ask management to confirm any outstanding common-property question. Propose an appointment or written response tied to the issue that needs resolving.
If the owners cannot agree, check the relevant dispute process. The Strata Titles Boards can deal with certain disputes within their jurisdiction, including some inter-floor leakage matters. Review which order may be available and what documents would support it. If the case involves substantial damage or contested responsibility, obtain advice on the right procedure and deadlines.
Keep the investigation separate from the dispute record
Continue to record new observations and agreed access arrangements while a dispute is being discussed. A change in the location or timing of the leak may help a professional refine the diagnosis. If the parties agree to an immediate safety or mitigation step, record who will arrange it and whether any other decision is still open. A dated account is more useful than a chain of conflicting recollections.
Give the owners and management a specific next step
If the investigation has stalled, propose a practical next action tied to the outstanding issue. This could be an agreed inspection date, confirmation of whether a pipe is common property or a written answer about who will obtain a second quote. Give enough detail for the recipient to respond. Preserve any previous appointment or access agreement so the chronology is complete.
After a meeting, write down the agreed scope and decisions that still need confirmation. If a party raises a new concern, ask which finding or document it relates to. If an application is being considered, keep track of the applicable procedure and any deadlines with an adviser. Continue to report significant changes to the building condition through the usual management channel.
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Is an upstairs owner always responsible for a ceiling leak?
The presumption is rebuttable. Investigate the actual source and check whether it is in a lot or common property.
Who pays if a common-property pipe caused the leak?
BCA says the management corporation is responsible for repairing a leak in a pipe that constitutes common property. Confirm the component and any separate damage costs.
Should I paint over the stain?
Ask the investigator or contractor to confirm the source, repair and drying sequence before reinstating finishes.
What if I rent the lower unit?
Notify the landlord and management, retain the records and check the tenancy terms for authorising work.
Where can owners go if they cannot agree?
Check the Strata Titles Boards’ process for disputes within its jurisdiction and seek advice for the circumstances of the case.
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