Common elements of a bathroom renovation contract include the parties, agreed work, plans and price. It also records dates, payment stages and how changes are made. Any estimated part of the price should be clear. In Victoria, work that involves more than one trade and is worth more than $10,000 needs a major domestic building contract before it starts. That rule comes from Consumer Affairs Victoria.
The documents need to describe the same project. A chosen fitting, a drawing and an allowance can refer to different versions of the work unless their relationship is clear. Victorian guidance checked 20 October 2026. This is general information, not legal advice about your own agreement.
What are the main documents in a bathroom renovation contract?
The signed agreement commonly refers to plans, specifications and selections as well as its main terms. The references matter: identify which documents and versions form the agreement, rather than assuming that every brochure or email is included.
Consumer Affairs Victoria’s checklist says a major domestic building contract must be in writing. Its requirements include the following; this is a summary, not the complete legal checklist:
- The parties. Names and addresses of both sides.
- The work. A detailed description, in clear English.
- The plans and specifications. Everything that clarifies the agreed terms.
- The price. The contract figure, with estimated parts identified.
- The deposit and progress payments. Both as the law requires.
- The date it takes effect. The day both parties signed.
- The implied warranties. Set out in the document itself.
- The builder’s registration number. As it appears on their certificate.
- Cooling-off information. Advice about the five clear business days after receiving the signed contract, with exceptions such as prior independent legal advice.
- The approved checklist. The approved domestic building contracts checklist must be included.
A quote records a proposed price and work. Whether accepting it creates a binding agreement depends on its terms and the circumstances; a quote should not simply be dismissed as having no contractual effect. For a major domestic building contract, the written agreement still needs to meet the applicable legal requirements.
When does Victorian contract guidance apply?
Which rules reach your job depends on what it is worth and how many trades it needs.
Consumer Affairs Victoria recommends a written contract for all building work, whatever its size and price. Above that, a job that involves more than one trade and is worth more than $10,000 must have a major domestic building contract before work starts.
Some jobs sit outside that second rule. A separate contract for only one listed type of work, such as tiling or painting, is generally exempt from the major contract requirement. Put the agreement in writing even so. This does not remove obligations under other applicable laws.
For example, a proposed renovation involving plumbing, tiling and electrical work differs from a separate wall-tiling job. The applicable contract requirements depend on the work being agreed, not the age of the house or the suburb.
Two more conditions come with a major contract. The builder must be registered with the Building and Plumbing Commission (BPC) to enter into one, and that number has to appear in the contract. You must also be given a copy of the Domestic Building Consumer Guide before you sign. Consumer Affairs Victoria recommends a building lawyer read a contract first, and for your own agreement that is the person to ask.
How does the agreement describe the work?
The work is described twice: once in words, and once in the plans and specifications those words point at.
Consumer Affairs Victoria recommends listing the details of your choices, such as make, model, colour or style. It also recommends saying who supplies goods such as tiles or tapware. The supply responsibility belongs beside the item description, so the agreed product and who supplies it can be understood together.
Take a hypothetical bathroom. You choose a particular wall-hung vanity, but the proposed description says only supply and install vanity. The description does not identify the selected product. Recording the agreed make, model and relevant specifications reduces that ambiguity; it does not by itself settle every installation or supply condition.
The names and addresses do similar work. The person you deal with on site is not always the entity you are signing with.
How a quote itemises the same work, line by line, is covered in the published guide to where the money goes in a bathroom renovation.
What do allowances and variations describe?
An allowance is a placeholder for something not yet settled. A variation is a change to something that was.
A prime cost allowance covers a listed fixture or fitting whose make, model or exact price was not agreed at signing, such as taps or tiles. A provisional sum item is listed work that might be needed, such as excavation, where only a reasonable estimate is possible.
A variation changes agreed plans or specifications. Consumer Affairs Victoria distinguishes these changes from adjustments to existing prime cost and provisional sum allowances. Both can affect the amount payable, but they are not interchangeable. The law, as well as the contract, governs the process; a conversation on site does not establish that the legal requirements have been met.
| Item | What is not settled | What it means for the final amount |
|---|---|---|
| Prime cost item | the make, model or exact price of a listed fitting | the allowance is an estimate; the actual item cost may differ |
| Provisional sum item | the cost of work that might be needed | only an estimate is possible, so the amount can move |
| Variation | agreed plans or specifications are changing | the proposed change may affect price and timing; legal requirements apply |
Consumer Affairs Victoria recommends avoiding prime cost and provisional sum allowances where possible. Specific selections can reduce uncertainty, but do not guarantee that the total price can never change. Variations generally need a written record signed by both parties, including effects on price and the completion date. Statutory exceptions apply. Check the applicable requirements for each proposed change.
How are timing and payments recorded?
Timing and payment terms need to be identifiable alongside the description of the work.
Consumer Affairs Victoria’s checklist says the contract should state a start and finish date, with allowances for delays. Where the start date is not known, it should say how that date will be worked out. It should also say how many days the work needs once it has started.
The money side has two parts. The deposit and the progress payments are both set as the law requires. Consumer Affairs Victoria explains that the Domestic Building Contracts Act 1995 regulates deposits and progress payments. A whole-house stage description should not be assumed to describe every bathroom project; the proposed payment schedule needs to suit the work and comply with the law. Consumer Affairs Victoria also says to check that you have only agreed to pay progress payments for work already completed.
A deposit and a progress payment serve different purposes. The payment schedule should identify which is being requested and the work associated with each progress stage.
How do insurance and implied warranties differ?
Insurance cover and implied warranties are different forms of protection.
For eligible contracts signed on or after 1 July 2026, Home Warranty replaces Domestic Building Insurance (DBI) for eligible work worth more than $20,000. The Building and Plumbing Commission explains the current Home Warranty scheme and its eligibility limits. It excludes residential buildings of more than three storeys containing more than two homes.
The registered builder must pay the premium. BPC issues a Notice of Cover when it accepts payment; check that the project details match the contract. The scheme may help where work is incomplete, defective or non-compliant and the builder cannot or will not finish or fix it. Eligibility, limits and exclusions apply.
Earlier contracts may remain covered by DBI. That scheme required cover for work over $16,000 and generally protected against the builder’s death, disappearance or insolvency. Existing DBI policies continue under their terms; they do not transfer to Home Warranty.
Implied warranties concern rights that the contract cannot remove. The contract has to set them out. Consumer Affairs Victoria lists any statement that restricts or denies your rights to implied warranties among the illegal terms in a building contract. They are rights you keep whatever the document says.
How do the quote and contract relate?
The work, selections, allowances and agreed changes should be identifiable across the quote, contract and later documents. An outdated drawing or a different product description can obscure what was agreed.
Consumer Affairs Victoria publishes its full building checklist for the review before signing. A settled selection belongs with the work description; an allowance remains an estimate.
Bathroom King renovates bathrooms, laundries and kitchens across south-east Melbourne from Ferny Creek. To start a quote, the get a quote page takes your contact details and a preferred date, and plans can be uploaded with the enquiry.
