Upload up to five builder quotes and compare them on a level playing field by assigning a dollar value to items one quote includes and another does not - such as driveways, flooring, air conditioning and landscaping. The adjusted totals show which contract may actually be cheapest once inclusions are standardised.

What counts as Included?

Mark a category as "Included" when the builder has confirmed in writing that it is part of the contract price, with no allowance or provisional sum. If the contract uses a provisional sum (PS) or prime cost (PC) item for the category, mark it as Variable instead.

Why is Variable treated as Excluded in the calculation?

Variable items (provisional sums, prime cost items, or anything "subject to selection") routinely end up costing more than the builder's estimate. To protect you from a false sense of security, the comparable price calculation treats Variable the same as Excluded and adds the typical cost-to-add for your state. This is conservative by design.

Where do the cost-to-add defaults come from?

The defaults are state-level median estimates based on HIA Housing Australia cost guides, Rawlinsons Residential Building Handbook pricing patterns, and published builder upgrade price lists. They are a starting point - get actual quotes from your builder or a quantity surveyor before making any financial decision.

What if my builder bundles two categories together?

Set both categories to the status that best reflects how the builder has treated them. If one price covers both, enter the combined cost in whichever category feels more significant and set the other to Included. The goal is to reach an apples-to-apples comparable total, not a precise line-item breakdown.

Can I save my comparison to come back later?

Not in the current version. Tap or click "Copy Summary" to copy a plain-text snapshot to your clipboard, then paste it into a note, email, or document. A save feature may be added in a future update.

How does build type (single storey vs double storey) affect costs?

Changing the build type applies a multiplier to all cost-to-add estimates: single storey is the baseline (1x), double storey adds about 10% to most exclusion costs (more scaffolding, structural complexity), and split level adds about 20%. The multiplier applies uniformly - your builder may price individual items differently.

Is this legal or financial advice?

No. This tool is general information only. It does not take into account your personal objectives, financial situation, or needs. Always read the builder's contract carefully and seek independent legal or financial advice before signing. If you have questions about a specific calculation, you can contact us at help@unpackproperty.com.au.