Do You Need a Permit for a Bathroom Renovation in Victoria?

Permits are not always obvious

Many homeowners assume that a bathroom renovation, being inside the house, never needs a permit. Others worry that every change needs council approval. The truth lies in between. Most bathroom renovations that keep within the existing footprint and do not alter the structure do not require a building permit. But several situations can trigger approvals, certificates or registration requirements, and some of these apply even to modest projects.

This guide explains the main approvals that can apply to a bathroom renovation in Victoria, with notes for homes in Baw Baw Shire and neighbouring Cardinia. It is general information, not legal advice. Rules change, and specific circumstances matter, so confirm the requirements with your council, a registered building surveyor or the Victorian Building Authority before starting.

Building permits

A building permit is issued by a registered building surveyor, either private or at council, and confirms that proposed building work complies with the Building Regulations and the National Construction Code.

When a bathroom renovation may need a building permit

• Structural changes: removing or altering load-bearing walls, changing floor framing significantly or creating new openings in structural walls.
• Extensions: adding floor area to create a larger bathroom or new ensuite.
• Changes to fire separation: in attached homes such as townhouses or units, work affecting fire-rated walls or ceilings.
• Restumping: in some cases, restumping or underpinning work may require a permit.
• Change of use: converting a non-habitable space such as a garage into a bathroom.
• Certain demolition: partial demolition affecting structure.

When it usually does not

Replacing tiles, fixtures, fittings, vanities and waterproofing within the existing bathroom footprint, without structural changes, generally does not require a building permit. However, the work must still comply with the relevant standards, including AS 3740 for waterproofing.

Planning permits

Planning permits are issued by council and relate to land use and development rather than construction standards. Internal bathroom renovations rarely need a planning permit, but exceptions include:

• Heritage overlays: in some areas, external changes such as new windows or roofing may need approval. Some heritage controls also cover internal alterations, though this is uncommon.
• Extensions: adding floor area may require planning approval depending on zoning and overlays.
• Bushfire Management Overlay: extensions or new buildings in these areas may require a planning permit with bushfire considerations.

Check the planning scheme maps for your property, available through the state government’s planning property report service, to see which zones and overlays apply.

Plumbing compliance

All plumbing work in Victoria must be carried out by a licensed or registered plumber. For many types of plumbing work above a certain scope, the plumber must lodge a compliance certificate with the Victorian Building Authority and provide a copy to the property owner. This certificate confirms the work complies with plumbing standards. Bathroom renovations that relocate fixtures, install new drainage or alter water supply typically involve compliance certificates. Keep these documents for your records.

Electrical compliance

All electrical work must be performed by a licensed electrician. After completing prescribed electrical work, the electrician must provide a certificate of electrical safety. Bathroom work involving new circuits, lighting, exhaust fans, heated towel rails, underfloor heating or power points will usually require one.

Registered builders and domestic building contracts

In Victoria, domestic building work above a prescribed value must be carried out by a registered domestic builder under a major domestic building contract, and domestic building insurance is required above a certain value. A full bathroom renovation involving several trades may exceed these thresholds. The thresholds have changed over time, so check the current figures with the Victorian Building Authority.

If you engage individual trades directly, each must hold any registration or licence required for their trade, and you may be acting as an owner-builder, which has its own obligations above certain values.

Owner-builders

Homeowners who manage their own renovation and engage trades directly may be considered owner-builders. Above a certain value, an owner-builder certificate of consent is required from the Victorian Building Authority before a building permit can be issued. Owner-builders also take on responsibilities for compliance, safety and warranties, and there are disclosure requirements if selling within a set period.

Asbestos

Homes built before 1990 may contain asbestos. In Victoria, removal of asbestos-containing material above certain quantities, or of friable asbestos, must be performed by a licensed asbestos removalist. Even smaller quantities must be handled safely. Testing suspect materials before demolition is strongly recommended.

Wastewater systems

On properties with septic tanks or treatment systems, regulated by local councils under EPA guidelines, adding a bathroom, increasing the number of fixtures or altering the system may require a permit to alter or install an on-site wastewater management system. In rural parts of Baw Baw and Cardinia, this is a common consideration when adding an ensuite or converting outbuildings.

Bushfire construction requirements

In designated bushfire-prone areas, which cover much of the hill country around Warragul, including parts of Jindivick, Neerim South, Labertouche and Brandy Creek, new building work that requires a building permit must comply with bushfire construction standards appropriate to the site’s bushfire attack level. If a bathroom renovation includes new windows, external doors or an extension requiring a permit, these requirements may apply to glazing, frames, vents and materials.

Body corporate approvals

In units, townhouses and apartments, renovations may need owners corporation approval, particularly where work affects common property, plumbing stacks, waterproofing between floors or noise. Check your owners corporation rules early.

Baw Baw and Cardinia notes

Warragul, Drouin, Yarragon, Trafalgar, Neerim South, Longwarry and nearby towns are in Baw Baw Shire. Bunyip, Garfield and some western localities are in Cardinia Shire. Each council administers its own planning scheme and on-site wastewater permits. The building permit process is consistent statewide but may be handled by council or private building surveyors.

Converting spaces into bathrooms

Converting a laundry, bedroom, garage or shed into a bathroom raises more questions than renovating an existing one. A garage conversion is usually a change of building classification and is likely to require a building permit, as the space must meet requirements for habitable or wet areas, including ceiling heights, ventilation, light, insulation and energy efficiency. Converting a bedroom into an ensuite may involve new plumbing and drainage connections, and possibly structural changes for floor falls. Bathrooms in detached outbuildings, such as studios or bungalows, are subject to rules on how those buildings can be used and may require permits as well as wastewater approval. Discuss conversions with a building surveyor before committing.

Accessibility modifications

Bathroom modifications for accessibility, such as step-free showers, wider doorways and grab rails, usually do not need a building permit unless they involve structural work. However, if the work is funded through a scheme such as the NDIS or a home care package, the funding body may require specific reports, quotes or an occupational therapist’s assessment. Grab rails must be fixed to adequate backing, which is best planned before linings and tiles are installed.

Energy efficiency and ventilation

Where a building permit is required, energy efficiency and ventilation provisions of the National Construction Code may also apply, affecting glazing, insulation and exhaust. Even where no permit is required, good practice is to duct exhaust fans to the outside rather than into the roof space to prevent moisture problems.

Documents worth collecting

At the end of a renovation, you should hold:

• Plumbing compliance certificate(s), where required
• Certificate of electrical safety
• Building permit and occupancy or final inspection certificate, if a permit was required
• Domestic building insurance certificate, if applicable
• Asbestos clearance certificate, if licensed removal occurred
• Waterproofing details and photographs, plus product warranties
• Wastewater permit and certificate to use, where applicable

Questions to ask before you start

• Does my project involve any structural changes?
• Is my property in a heritage, bushfire or other overlay?
• Am I on a septic or treatment system, and will fixture numbers change?
• Does the project value require a registered builder and domestic building insurance?
• Will the plumber lodge a compliance certificate?
• Will the electrician provide a certificate of electrical safety?
• Has the house been tested for asbestos?

Why compliance matters

Unapproved or non-compliant work can create problems when selling, insuring or refinancing a home. Buyers may request documentation, and insurers may decline claims for damage linked to non-compliant work. Keeping permits, certificates and photographs of your renovation protects your investment.

Common misconceptions

“It’s my house, so I can do what I like inside.” Internal work must still comply with building and plumbing standards, and licensed work must be performed by licensed trades, regardless of whether a permit is needed.

“Waterproofing doesn’t need anyone qualified.” In Victoria, waterproofing is regulated work, and AS 3740 sets the minimum standard. Poor waterproofing is one of the most common building defects, so engage a qualified waterproofer and keep records of the work.

“A permit just adds paperwork.” Where required, a permit provides independent inspections that confirm structural and safety elements before they are concealed. This protects you and future owners.

“Small jobs never need certificates.” Even a modest bathroom refresh involving relocating a tap or adding a power point can require plumbing or electrical compliance documentation.

What happens if work was done without approval

If you discover that previous work in your home was completed without required permits, for example a bathroom added by a former owner, a building surveyor can advise on options, which may include inspection and documentation of the existing work or a permit for remedial work. Addressing this before selling avoids last-minute complications.

Our approach

During our design consultation, we consider whether your project is likely to need approvals and explain the steps. Licensed plumbers and electricians carry out their work and provide compliance documentation. We arrange asbestos testing when needed and identify bushfire, heritage or wastewater considerations early.

A worked example

Picture a 1970s brick veneer home in Warragul where the owners want to remove the wall between a separate toilet and the bathroom to create one larger room. The wall turns out to be non-structural, the plumber relocates the toilet waste and lodges a compliance certificate, the electrician adds an exhaust fan and new lighting and provides a certificate of electrical safety, and a sheeting sample is tested for asbestos before demolition. No building permit is needed, but the documents produced along the way are still essential. Now imagine the same owners decide to push the bathroom out onto the verandah. That adds floor area, changes the external wall and may bring in bushfire construction requirements, so a building permit and possibly a planning permit come into play. Small changes in scope can change the approvals picture, which is why we discuss it at the start.

Book a design consultation

If you are planning a bathroom renovation in Warragul or nearby and are unsure about permits, book a design consultation. We will assess your project and explain any approvals likely to apply.

Our bathroom services

• Accessible Bathrooms
• Full Bathroom Renovations
• Bathroom Resealing and Silicone Replacement
• Bathroom Tiling
• Ensuite Renovations
• Laundry Renovations
• Bath to Shower Conversions
• Shower Screens
• Small Bathroom Renovations
• Tile and Grout Cleaning
• Vanity Replacement
• Bathroom Waterproofing