Is Your Renovation Quote Missing Hidden Costs?

A good renovation quote is comprehensive, clear, and itemised rather than a single lump-sum figure. Look for specific material specifications, brand names, clear trade allowances, stated exclusions, waste removal/skip bin hire, and milestone payment schedules. A suspiciously low quote is often the riskiest, as contractors may deliberately omit necessary preparation work or set artificially low Prime Cost (PC) allowances that inevitably result in costly variations once work is underway.

To check a quote thoroughly:

• Trade Sequence: Verify that every phase is accounted for—demolition, structural prep, rough-in, waterproofing, plastering, fit-off, painting, and site clean-up.
• Allowances: Check whether fixture allowances (tiles, tapware, appliances) match real-world prices or are lowball placeholders.
• Exclusions: Look closely at the fine print for common exclusions like subfloor levelling, electrical switchboard upgrades, or council certifier fees.
• Automated Diagnostic: You can upload your PDF or photo to our free AI Quote Checker above to automatically cross-check your line items against regional building standards and trade checklists.

You should obtain at least 3 written quotes based on an identical scope of work, architectural drawings, and finishes schedule. Getting fewer than three gives you no reliable frame of reference for current trade rates, while getting more than 4 or 5 usually leads to quote fatigue and confusion. When comparing, ensure you compare line items and inclusions rather than just the bottom-line price.

Before signing or transferring any deposit:

• Verify Credentials: Check your contractor's active trade license, public liability insurance, and statutory Home Building Compensation / Warranty Insurance on your regional government registry.
• Check Deposit Limits: Ensure the deposit complies with statutory laws (e.g. capped at 5% to 10% maximum depending on contract value in most Australian states).
• Document Changes in Writing: Ensure every verbal discussion, material change, or inclusion is reflected in the written contract or annexed specification sheet.
• Clarify Variations: Establish the exact written approval process and builder margin percentage applied to variations before work begins.

An estimate is an approximate calculation or educated guess of what the project might cost; it is not legally binding and can fluctuate as works progress. A quote is an exact, legally binding price for a clearly specified scope of works once accepted. Unless you formally request variations or provisional allowances are adjusted, a contractor cannot arbitrarily increase an accepted fixed-price quote.

Prime Cost (PC) items are allowances for supply-only fixtures where the exact model hasn't been selected yet (e.g. $40/sqm tile allowance). Provisional Sum (PS) items are allowances for work and materials that cannot be accurately determined before work begins (e.g. rock excavation or subfloor repairs). If a builder sets these allowances unrealistically low to make their quote appear cheaper, any shortfall between the allowance and actual costs is charged to you as a variation, often with an added 15%–25% builder margin.

Under a standard fixed-price contract, a builder can only charge more if:

• You request changes to design, fixtures, or scope (homeowner variations).
• Actual supply costs exceed stated Prime Cost or Provisional Sum allowances.
• Unforeseen latent defects are uncovered (e.g., hidden termite damage, illegal wiring, or rotted timber lintels) that could not have been reasonably identified during the site inspection. These must still be documented in a written variation before extra charges apply.

Our tool uses enterprise level multimodal AI to read text, line items, and handwritten notes directly from your photo or PDF. It checks line items against standard construction stage scopes and your region's statutory compliance rules to highlight omissions, lowball allowances, and contract ambiguities. It is designed to help identify potential omissions and risks before you sign.

Yes. Multimodal vision models excel at reading contractor handwriting, shorthand abbreviations (such as “incl. r/in” or “PC allow”), and photographed receipts. If a specific note is illegible, the audit will explicitly flag it for verification.

Every homeowner gets 1 comprehensive quote audit free every 30 days upon entering their name and email. If you are comparing multiple quotes right now, you can start a 14-day free trial of RenovateRight.app to instantly unlock 3 more quote checks and full project management tools. The trial also lets you start managing your renovation project within the software to see if our platform is for you.

Yes. Your quote is processed securely in private memory and is never shared with third parties or contractors. Logged-in users can optionally save their audit directly into their private Home Master Record document vault. The quote you upload is not saved unless you choose to store it in your account's project documents vault.