Owner-Builder Terminology (Victoria)

Owner-Builder

An owner-builder is the person legally responsible for carrying out domestic building work on their own property, instead of engaging a registered builder to manage the project.

Being an owner-builder does not mean you personally do the work — it means you control the site, coordinate trades, and carry legal responsibility for compliance.

Owner-Builder Certificate of Consent

A Certificate of Consent is required in Victoria before an owner-builder can apply for a building permit, depending on the scope and value of the work.

It is an early gate in the process and must be confirmed before design and approvals are locked in.

Reasonable Market Cost

Reasonable market cost refers to what the project would typically cost if priced by a registered builder — not just what the owner-builder personally pays.

This includes labour, materials, owner-supplied items, discounted work, and excludes only genuinely unrelated work.

Planning Permit

A planning permit deals with how a development fits within planning controls such as zoning, overlays, neighbourhood character, and amenity impacts.

Planning approval is separate from building approval and is usually assessed by council.

Building Permit

A building permit authorises construction work to begin and confirms that the design meets building regulations and technical standards.

It is issued by a registered building surveyor, not council.

Building Surveyor

A building surveyor issues the building permit, sets inspection stages, and finalises completion outcomes.

As an owner-builder, you are responsible for appointing the surveyor and ensuring inspections are booked and passed.

Inspections

Inspections are mandatory checks at defined stages of construction to confirm compliance with the approved documents.

Missing or undocumented inspections are one of the most common causes of delays at completion.

Contract Works Insurance

Contract works insurance covers damage to works-in-progress and building materials during construction.

It applies from day one of construction — even before major work begins.

Protection Works

Temporary or permanent works required to protect adjoining properties when construction may affect their structural stability.

Protection works obligations can trigger additional documentation, neighbour notices, and insurance disclosure requirements.

Protection Works Notice

A formal notice served on adjoining owners when protection works are required under the Building Act.

Failure to issue notices can delay works or expose the owner-builder to liability.

Dilapidation Report

A condition report documenting the state of adjoining properties before construction begins.

Often required where protection works apply and commonly relied on for insurance and dispute resolution.

Public Liability Insurance

Public liability insurance covers injury to third parties or damage to other property arising from the construction site.

As the person in control of the site, this responsibility sits with the owner-builder.

Existing Structures

Existing structures refers to parts of an existing building that remain in place during renovations or extensions.

Existing home insurance often excludes construction-related risks, which is why this requires explicit consideration.

Completion (VIC)

In Victoria, completion is the point at which a registered building surveyor confirms that the building work has been carried out in accordance with the building permit and relevant regulations.

Depending on the type of work approved under the building permit, completion is confirmed by one of the following:

• Certificate of Final Inspection — commonly issued for alterations, additions, and renovation work to an existing dwelling.
• Occupancy Permit — required where a new dwelling (or part of a building) is being approved as suitable for occupation.

Your building permit will specify which completion document applies to your project.

Completion is separate from selling obligations and does not remove any owner-builder responsibilities that apply after the build is finished.

Used on: VIC Step 7 (Final inspection and completion), VIC After completion & selling