How to Compare Renovation Quotes in Melbourne Like a Builder

Quote totals diverge for structural reasons that have little to do with greed or generosity.

• Different assumed scope: One builder priced patching and painting the adjacent hallway; another stopped at the doorway. One allowed for relocating the drainage; another assumed it stays.
• Different allowance levels: A $40 per square metre tile allowance and a $110 allowance can hide inside identical-looking line items and diverge by thousands across a project.
• Different exclusion strategies: Some builders price everything and look expensive. Others price the minimum and look cheap, knowing the gaps come back later as variations.
• Different overhead structures: A builder with supervision, systems and insurance costs prices differently to a sole operator juggling four jobs, and the difference shows up on site as well as on paper.

None of this makes any single quote dishonest. It makes raw totals meaningless. The comparison work is about converting three different documents into one common project so the numbers finally mean the same thing.

Take a spreadsheet and list every element of the project down the left: demolition, structural work, plumbing, electrical, plastering, waterproofing, tiling, joinery, benchtops, glazing, painting, fixtures, appliances, permits, waste and site protection. Then map each quote against it, marking each item as included, excluded, allowance or unclear.

By the time this table is full, the $48,000 quote has usually grown and the $74,000 quote has usually explained itself. The real spread between comparable projects is almost always narrower than the raw totals suggested.

Prime cost and provisional sums are where cheap quotes hide their cheapness. Each one is a placeholder, and you pay the difference when reality exceeds it.

• Check them against your actual taste: Visit a tile shop or browse the ranges you like, then compare with the allowance. If you gravitate to $90 per square metre tiles and the quote allows $40, that quote is understating your project.
• Check quantities, not just rates: An allowance can be honest per unit and still assume too few units: too few square metres of tiling, too few downlights, too little board area of joinery.
• Ask what happens on overrun: Confirm how differences are calculated and whether the builder adds margin to the overrun amount. This is typically addressed in the contract and worth understanding before signing.
• Count the provisional sums: A quote where a third of the value sits in provisional sums is not really a fixed price. It is an estimate wearing a contract.

A practical rule: the more decided your selections are before quoting, the fewer allowances the quotes need, and the more comparable they become. Homeowners who choose fixtures and finishes early get tighter, more honest pricing.

The exclusions section is short, dense and where the mid-build surprises live. Common exclusions worth actively questioning on Melbourne renovations include:

• Asbestos removal: Reasonable to exclude before testing, but ask how it will be handled and priced if found, especially in pre-1990 homes.
• Switchboard and service upgrades: Frequently needed in older homes once load is added; an exclusion here can hide thousands.
• Structural rectification: Restumping, lintel repairs and termite damage discovered during demolition.
• Making good: Patching, painting and flooring transitions in rooms adjacent to the renovated area.
• Council and authority fees: Permit levies, asset protection permits and out-of-hours or parking costs in inner suburbs.

An exclusion is not a red flag by itself; pricing the unknowable would just pad every quote. The red flag is a builder who cannot explain what a likely excluded item would cost if it eventuates, or whose quote is silent on things the other two quotes address openly. Silence in a quote is never free.

Once the numbers are normalised, the remaining spread is buying differences in the builder, and those are worth evaluating deliberately.

• Registration and insurance: Confirm VBA registration and that domestic building insurance will typically be provided before deposit on work over $16,000. This is baseline, not a differentiator.
• Supervision model: Who is actually on site daily? A dedicated supervisor costs money and shows up in the price and the finish.
• Timeline honesty: Compare stated durations against each other. The outlier promising half the time is usually pricing a schedule they will not keep.
• Documentation quality: The quote itself is a work sample. A vague, one-page quote foreshadows vague, one-line variations.
• References on similar work: Speak to a recent client whose project resembles yours in scope and home age, and ask specifically about variations and communication.

When two normalised quotes sit close together, choose on process and trust. When one sits dramatically lower, you have usually found missing scope, thin allowances or a builder pricing to win and recover on variations. All three are expensive.

The whole comparison compresses into a repeatable routine.

• Build the normalisation table and classify every element across all quotes.
• Send each builder the same list of clarifying questions in writing, and keep the answers.
• Re-total each quote with realistic allowances and the likely cost of excluded items.
• Confirm registration, insurance approach, supervision model and timeline for each.
• Re-rank the quotes on the adjusted totals and the process quality you observed.

Two things reliably happen. First, the ranking changes: the cheapest headline number is rarely the cheapest adjusted number. Second, the process itself filters builders, because the ones with nothing to hide answer quickly and precisely, while the ones relying on ambiguity go quiet. Either way, you learn what you needed to know before signing rather than after demolition.