Who is responsible for building defects in Victoria?

A builder is an important starting point when defective work falls within a domestic building contract. But a crack, leak or uneven floor does not, by itself, identify who is legally responsible. The answer depends on the relevant obligations, what actually happened and the evidence connecting them. A passing inspection is not the end of that enquiry.

For an assessment of recurring leaks or other building defects, explore our building defects inspections. An article cannot determine the cause or appropriate solution for an individual property.

Roles and evidence relevant to building-defect responsibility.

General information for Victoria, checked on 23 October 2026. This is not legal advice or an assessment of a particular property. Obtain advice about your own contract, dates and circumstances. Urgent safety concerns need prompt professional help, not a wait for a responsibility dispute to be resolved.

Who agreed to do the work

Find the signed contract, scope, plans and approved changes. Identify who agreed to construct the work, who designed it and who inspected it. Keep later alterations and repairs in the same timeline. An invoice naming a trade, or a drawing carrying an engineer's name, is useful evidence of involvement; it is not a verdict on liability.

Domestic building contract law has a defined scope and exclusions. For example, specified separately provided professional design work and certain contracts for only one listed type of trade work are treated differently. Do not assume that every person working on a house gives the same statutory warranties.

What does the builder promise by law

For work under a domestic building contract within the applicable law, statutory warranties apply whether or not the contract prints them out. In plain language, they address:

• Workmanship and construction matching the contractual plans and specifications.
• Materials supplied by the builder being suitable for their use and, unless the contract says otherwise, new.
• Work complying with applicable laws and legal requirements.
• Reasonable care and skill, and completion by the contractual date or within its specified period.

There are also warranties about suitability for occupation for work within the relevant statutory scope, and fitness for a particular purpose or result where the contract and reliance conditions are met. These are obligations about the work, not an insurance policy or proof that every symptom is a building defect.

If a builder points to a subcontractor, ask which work and contractual obligation are in issue. Keep the subcontractor's involvement in the records, but do not let a discussion about who performed a task replace examination of the builder's own obligations. Whether another party also has legal responsibility needs separate advice.

What do permits tell you about responsibility

Building permits and planning permissions answer different questions. Victorian building law sets permit and compliance duties, including duties for the builder named in the permit. Its engagement exceptions and exemptions matter; it is not a simple rule that every owner is personally liable whenever paperwork is missing.

Before work starts, make the permit arrangements explicit and confirm the required approvals are in place. The contract should identify who obtains them. For domestic work within the relevant statutory restriction, the builder or a related person cannot appoint a private building surveyor on the owner's behalf. Recommending a surveyor is different from appointing one.

Some building work is exempt from building-permit requirements. That does not make every repair exempt, or remove the need to check planning controls. Ask the relevant surveyor and council about the actual work, property and any local requirements. This article does not determine a site's permit needs.

Are all building inspections the same

No. The builder named on the permit must ensure the relevant building surveyor is notified without delay when a mandatory notification stage is complete. The surveyor must then cause an in-person inspection. The rules deal with prescribed construction stages, omission of irrelevant stages and their specification in the permit. Read the permit rather than rely on a generic stage checklist.

A structural engineer's construction visit, an independent building inspection commissioned by the owner and the surveyor's statutory inspection can have different purposes. Hiring an engineer does not automatically replace the mandatory inspection process. Agree what each appointment covers and how concerns will be recorded and followed up.

This table helps you find the relevant records. It does not allocate blame. Read the engineer's engagement, the work actually undertaken and the report's stated limits. Ask a lawyer how those facts relate to any alleged duty or breach.

Does an occupancy permit mean there are no defects

An occupancy permit is evidence of suitability for occupation, but not evidence of compliance with building legislation or regulations. A certificate of final inspection also has statutory limits on what it proves. Keep those documents: they matter, but they do not settle every workmanship or contract question.

As owner, you can request copies of the relevant statutory inspection records in writing from the relevant building surveyor. Required record details include the stage, inspector and outcome. Ask for the records, not just an assurance that everything was inspected.

What changes for buyers and owner built homes

You do not necessarily lose warranty rights because you bought from the first owner rather than commissioning the builder. The statutory framework allows the current owner to pursue a breach of the relevant domestic building warranties as if they were a party to that contract. The relevant work, contract and time limits still need checking.

Owner-built homes need a separate enquiry. Owner-builder knowledge requirements and conditional sale-related requirements and warranties differ from an ordinary builder-contract checklist. Before buying or selling, obtain advice about the actual work and documents; do not treat that ordinary checklist as a complete answer.

For a unit or apartment, also establish which parts of the building are involved, whether common property may be affected and who is authorised to give instructions. Ask about the applicable pathway rather than assume that a detached-house example answers an owners corporation's position.

When can an engineering investigation help

When appointing an engineer, check practising registration for the relevant work and any required building endorsement. Victorian professional-engineer registration law defines the services and areas it regulates and recognises direct supervision; it is not a blanket rule about every person using an engineering job title.

Illustrative example: cracks appear after an extension, and the builder relies on a completed final inspection. An investigation may need the approved drawings, inspection records, earlier photographs and later repair history. The certificate and the crack photo are both relevant; neither alone explains what happened or determines legal responsibility.

An engineer can assess physical evidence and explain technical findings within an agreed scope. A construction lawyer can advise how those findings relate to duties, parties, remedies and deadlines. Make the question clear before commissioning either service: investigating cause is different from asking who should pay.