Is a Safe and Sanitary Report Enough for an Unconsented Garage Sink in New Zealand?
A buyer is looking at a house where a sink has been installed in the garage without consent, and the vendor is offering a safe and sanitary report as proof. Here is what that report does — and does not — prove.
Unjula is asking:
“We are looking to purchase a new house where a sink was installed in the garage without consent. The vendor is providing a safe and sanitary report as proof of compliance. Is this sufficient proof for the council? What are the risks and potential costs of buying a property in this condition?”
Location: New Zealand
A garage sink may look minor, but it can involve water supply, drainage, wall or floor penetrations, waterproofing, electrical work and council records. The key questions are when it was installed, what work was done and whether that work required building consent at the time.
Quick Answer
No — not usually where the sink was installed after 1 July 1992 and the work required consent. A safe and sanitary report can be supporting evidence, but it is not a building consent, Code Compliance Certificate or Certificate of Acceptance (CoA).
If the sink contributes to the property’s value, treat the unresolved paperwork and hidden work as a real pre-purchase risk rather than accepting the report at face value.
What the Report Does — and Does Not — Prove
A condition report can describe what an inspector could see on the day. It does not retrospectively grant consent or prove hidden pipework and connections comply. The sink installation may include:
- Hot and cold water supply pipework
- Waste pipework and a connection to the drainage system
- Penetrations through walls, floors or the concrete slab
- Cabinetry, splashbacks, linings or waterproofing
- Power points, lighting or appliances near the wet area
The report is one piece of evidence. Whether it is enough depends on the installation date, whether the work was exempt, the report’s scope and what council can verify.
Why 1 July 1992 Matters
Work before 1 July 1992
A CoA cannot be issued for work carried out before this date. A safe and sanitary or other third-party report may be recorded as evidence of visible condition, subject to the relevant council’s process.
That does not mean council approved, consented or inspected the work.
Work from 1 July 1992 onward
If consent was required but not obtained, a CoA may be available for completed work. Council can certify only the parts it is satisfied comply, based on what it can reasonably verify.
If evidence is insufficient, opening up, remedial work, removal or a new consent for proposed repairs may be needed.
Important: exemptions are not retrospective. The rules and circumstances of the work need to be checked, rather than assuming every added sink required consent.
Buying Before You Know the Risk?
We can review the property file, vendor documents and likely council pathway before you commit to a property with unconsented work.
Request a Pre-Purchase ReviewMain Risks for the Buyer
If you buy the house and retain the sink, you may inherit the practical and financial risk even though you did not carry out the work.
- Leaks and flooding: Poor pipe connections, unsupported waste pipes, incorrect falls or hidden joints can cause water damage.
- Drainage defects: The sink may be connected incorrectly, discharge to the wrong place, or lack a suitable trap or venting.
- Hidden waterproofing problems: If tiles, wet-area linings or splash zones were added, the waterproofing may not be verifiable.
- Electrical safety: New power points, lighting or appliances near the wet area may need electrical certification.
- Council record issues: Unresolved work can appear on the property file or LIM and affect a future sale.
- Insurance and lending risk: Insurers, lenders or future buyers may ask whether the work was lawful and properly documented.
Possible Resolution Pathways
Certificate of Acceptance
For post-1992 work completed without a required consent, a CoA may be the appropriate pathway. It may be limited to the parts council can verify and can be refused where compliance cannot be demonstrated.
Remedial work, removal or a new consent
Where hidden work cannot be verified or defects are found, the practical solution may be to expose, repair, remove or rebuild affected work. A new building consent can cover proposed remedial work; it does not erase the history of work already completed without consent.
Professionals Typically Involved
Architect / Designer
Review records, prepare plans, coordinate evidence and lodge the CoA or consent application.
Plumber / Drainlayer
Inspect water and waste connections, test the work and provide suitable evidence where appropriate.
Waterproofer
Assess tiled splash zones, wet-area linings or waterproof membranes where these form part of the work.
Electrician
Provide verification where power points, lighting or other fittings were added near the sink.
Building Surveyor
Provide independent condition reporting where hidden damage or older work is a concern.
Property Lawyer
Advise on conditions, warranties, retentions, settlement clauses or price adjustments.
Typical Costs to Resolve It
Costs depend on the evidence available and whether the work was built correctly. In a higher-risk case that involves documentation, opening up, repairs and council assessment, a broad planning allowance might be $10,000–$30,000+.
| Item | Indicative allowance |
|---|---|
| Property file / LIM review and initial advice | $500 – $1,500+ |
| Architectural drawings and CoA application support | $3,000 – $8,000+ |
| Plumber or drainlayer inspection, testing or report | $800 – $3,000+ |
| Waterproofer report or remediation, if relevant | $1,000 – $5,000+ |
| Electrical verification, if relevant | $300 – $1,500+ |
| Council fees, inspections, RFIs or pre-application meeting | $2,000 – $6,000+ |
| Opening up, repairs, removal or reinstatement | $2,000 – $20,000+ |
Indicative New Zealand planning allowances only, not quotes. A simple, well-documented installation may cost less; hidden defects may cost substantially more.
Typical Timeline
Start early if you need clarity before settlement.
Check whether the sink or associated plumbing appears in council records.
Confirm what exists and what plumbing, waterproofing or electrical evidence is available.
Prepare drawings, an evidence list, risk advice and the likely council pathway.
Council assesses the application and may request further information.
Further inspections or repairs may be needed where work cannot be verified.
Do not assume the matter can be resolved within a short due-diligence period unless the vendor already holds strong evidence.
Professional Insight
A safe and sanitary report should not be presented as though it is council approval for recent unconsented work. If the sink is being used to support the sale value, the buyer has a reasonable basis to seek proper evidence, require resolution before settlement, negotiate the price or exclude the feature from their value assessment.
Do not pay full value for an unresolved compliance risk.
Price the risk on the basis that you may later need to prove, expose, repair, remove or rebuild the work. Ask your property lawyer to reflect the agreed position in the sale and purchase agreement.
Need a CoA Strategy Before You Buy?
We can explain what the vendor’s documents prove, what evidence is missing and how the unresolved work should affect your next step.
View Certificate of Acceptance SupportPractical Checklist Before Going Unconditional
Official Sources and Scope
This general guidance was checked against official New Zealand building-system information current on 29 June 2026:
- Building Performance — Certificate of Acceptance
- Building Performance — Work that does not need consent
- Building Performance — Council records when buying a house
This article is general information, not legal, financial or property-specific advice. Council practice and the correct pathway depend on the work, its date, the evidence and the local authority. Obtain advice before relying on it in a purchase.