A renovation may be judged by its finishes, but its long-term safety depends on what sits behind them: circuits, drainage, gas lines and the certificates showing that the work was completed properly. In Victoria, electrical and plumbing work is closely regulated. The paperwork can matter to insurers, future buyers and anyone who later opens a wall.

Here is a practical process for Melbourne homeowners, covering how to verify licences, what to ask before signing, when each trade should be on site and which documents to keep.

What Victoria Expects of These Two Trades

Two regulators matter here. Energy Safe Victoria (ESV) oversees electrical licensing and safety. The Building and Plumbing Commission (BPC) oversees plumbing work, practitioner licensing and compliance certificates. Each trade produces documents you should expect to receive.

– Certificate of Electrical Safety (COES). This legal document is required for electrical installation work under the Electricity Safety Act 1998. Ask who will complete and provide it.
– Plumbing compliance certificate. A licensed plumber must issue one when the total value of the work exceeds $750 and for certain work types, including Type A gas appliance installation and below-ground sanitary drainage.

One date may affect longer renovation schedules. Victoria is due to adopt NCC 2025 Volume Three, the Plumbing Code of Australia, from 1 May 2026. The changes cover areas such as lead-free products, water services and cross-connection control. If your project extends beyond that date, ask how the timing affects product selection and approvals.

Shortlist Providers, Then Verify Them

Recommendations are a useful starting point, but they are not proof of licensing. Basic verification should only take a few minutes.

1- Search the ESV public register to confirm the status of licensed electrical workers and Registered Electrical Contractors (RECs).
2- Use the BPC’s practitioner search tool to confirm a plumber’s licence status, permitted work classes and any recorded disciplinary history.

Record licence and REC numbers in your project file alongside the quotes. Letterheads, vehicle signage and advertising do not prove registration. Apply the same check to plumbing businesses. If a firm such as O’Shea Plumbing is on your shortlist, confirm that its practitioner’s licence class covers the work in your scope.

When comparing local options for rough-in work, switchboard upgrades or compliance sign-off, you might include an electrician Melbourne option. Check the REC number on the ESV register before making a booking.

Questions Worth Asking Your Electrician

Renovations can add substantial electrical demand through induction cooktops, heat pumps, electric vehicle chargers and outdoor kitchens. Heat pumps are worth settling early, since climate control planning drives duct routes, unit positions and the electrical work behind them. Ask these questions before the quote is finalised.

– Will the additional load require a switchboard upgrade, and can the existing supply support it?
– Which parts of the job count as prescribed electrical work? Prescribed work must be inspected by an independent Licensed Electrical Inspector before it is energised. Ask the contractor to allow time for this inspection in the schedule.
– When will I receive my COES? For non-prescribed work, the customer must receive a copy within 30 days.
– Do the smoke alarms need to be upgraded? Homes constructed, largely renovated or extended after 1 May 2014 require interconnected, hard-wired alarms. Homes built after 1997 require hard-wired alarms with battery backup.

O’Shea Electrical lists services such as switchboard upgrades, smoke alarms, lighting and data cabling. That range is relevant to many whole-home renovations, but the written quote should still identify the exact work, exclusions, inspection requirements and certificate arrangements.

Plumbing Scope, Gas Work And Product Choices

Plumbing positions and product requirements are often fixed early, so raise these questions at the quote stage rather than waiting until fit-off.

– Does the scope require a compliance certificate, and when will I receive it? Licensed plumbers must provide the certificate and lodge it with the BPC within five business days of completing the work.
– For gas appliances, will the work be completed by a practitioner licensed for the relevant class, and will the required certificate be lodged?
– If the project continues beyond 1 May 2026, will copper-alloy products that contact drinking water carry Lead Free WaterMark certification and meet the 0.25% maximum weighted average lead-content requirement?
– How will water pressure and temperature be controlled when fixtures change, including any need for pressure-limiting or tempering valves?

When comparing quotes for hot-water changes, drainage or gas appliance work, ask each plumber to confirm in writing whether a BPC plumbing compliance certificate will be issued. O’Shea Plumbing can be assessed on the same basis: licence class, written scope, certificate responsibility and timing.

Sequence The Work For a Smoother Fit-Off

The usual order is demolition and structural work, followed by plumbing and electrical rough-ins. Walls are then closed before cabinetry, benchtops, flooring, tiling and splashbacks are installed. Taps, fixtures, lights and switches are fitted near the end.

The most useful rule is simple: complete and inspect rough-ins before closing the walls. Reopening a lined wall for a moved waste pipe or forgotten data cable creates avoidable cost and delay. Include buffer days for required inspections and mark them on the project schedule.

Compare Quotes, Contracts And Deposits

Obtain at least three comparable quotes based on the same written scope. Before choosing a provider, confirm each practitioner’s registration and ability to arrange the required COES or plumbing compliance certificate.

Compare inclusions rather than headline totals. Check fixtures, prime cost items, waste removal, repairs to surrounding finishes, certificates and attendance at inspections. When comparing written scopes for hot-water changes, drainage or gas appliance work, include a plumber Melbourne option and confirm the licensed gasfitter/plumber can issue any required BPC plumbing compliance certificate. For domestic building contracts covered by Victorian deposit limits, the maximum is generally 10% for contracts under $20,000 and 5% for contracts of $20,000 or more. Confirm which rules apply to your agreement, and link progress payments to completed stages rather than calendar dates.

Watch For Red Flags And Keep The Paperwork

Be cautious if a provider will not supply a licence number, is vague about certificates, resists a written scope, requests an unusually large upfront payment or will not account for required inspections. ESV, the BPC and Consumer Affairs Victoria provide official guidance and complaint pathways.

Keep one project folder containing every COES and plumbing compliance certificate, relevant WaterMark and Lead Free WaterMark evidence, manufacturer data sheets, receipts, photographs of open walls before lining and notes showing the final locations of concealed services. These records can simplify warranty claims, insurance questions, maintenance and future sale enquiries.

A Practical Way To Make The Final Choice

Choosing trades for a Melbourne renovation is less about persuasive claims and more about verification. Check public registers, agree on the scope in writing, schedule rough-ins early and collect certificates as work is completed.

Local firms such as O’Shea Electrical and O’Shea Plumbing may be included in a Melbourne homeowner’s comparison. Whichever providers make the shortlist, apply the same licensing, scope, scheduling and documentation checks to each one.