What is actually fixed, what can still change, and what Victorian buyers should verify before signing a house and land or turnkey contract.
Build Contract Reality
Fixed-price does not mean everything is fixed.
“Fixed-price” is one of the most misunderstood terms in house and land. Buyers hear it and assume the final cost cannot move. That is not how it works. A fixed-price build usually means the builder has fixed the price for a specific scope, specific inclusions and specific assumptions.
If the scope changes, if site conditions differ, if the buyer upgrades selections, if developer requirements were missed, or if important items were excluded, the cost can still move. That is where buyers get caught.
The goal is not just to ask whether a package is fixed-price. The better question is: fixed-price for exactly what?
Buyer Checklist
What must be checked before signing
Site costs
Check whether site costs are fixed, provisional, estimated or subject to engineering and soil conditions.
Developer requirements
Confirm whether estate guidelines, façade requirements, driveway standards, landscaping rules and fencing requirements are included.
Floor coverings
Some packages include carpet and tiles, while others leave gaps. Confirm every floor area clearly.
Heating and cooling
Check whether heating, cooling or split systems are included, where they are located and what specification applies.
Window furnishings
Blinds and window coverings are often assumed by buyers but not always included.
Driveway and paths
Confirm driveway type, crossover assumptions, porch/path allowances and whether external concrete is complete.
Landscaping
Front landscaping, rear landscaping, turf, garden beds and letterbox inclusions should be checked line by line.
Fencing
Boundary fencing, side gates and developer fencing requirements can affect final cost.
Appliances
Confirm brand, model, size and whether dishwasher, rangehood, cooktop and oven specifications are clear.
Aurelian View
The dangerous part is not the fixed-price label. It is the assumptions behind it.
A package can be advertised as fixed-price and still leave the buyer exposed. The risk usually sits in the exclusions, allowances, site assumptions, land timing and variation process.
Serious buyers should not rely on marketing language. They should read the contract, inclusions, site cost assumptions and developer requirements before committing.
Risk Areas
Where fixed-price builds can still change
Provisional sums
These are allowances, not guaranteed final costs. If the actual cost is higher, the buyer may pay more.
Prime cost items
These are allowances for selected items. If the buyer chooses above the allowance, the cost increases.
Exclusions
A fixed-price contract can still exclude items that the buyer needs after handover.
Variations
Any buyer-requested change after contract can add cost and delay.
Site conditions
Rock, fill, fall, drainage, retaining walls or poor soil can affect cost if not properly allowed for.
Expired pricing
Some pricing is only valid for a limited period, especially when land is not titled yet.
Fixed vs Complete
Fixed-price and turnkey are not the same thing
A fixed-price build can still be incomplete from a buyer’s perspective. A turnkey package should be closer to rental-ready or move-in ready, but even “turnkey” needs to be checked carefully.
The buyer needs to confirm whether the home includes the practical items required after handover: flooring, blinds, landscaping, fencing, driveway, heating, cooling, appliances, letterbox, clothesline and any developer requirements.
Contract Questions
Questions to ask before you commit
Fixed-Price Build FAQs
Frequently asked questions
No. Fixed-price usually means the builder has fixed the price for the specified scope, inclusions and assumptions. Costs can still change through variations, exclusions, provisional sums, prime cost items or changed site conditions.
Check site costs, inclusions, exclusions, developer requirements, provisional sums, prime cost items, build timeframe, variation process, land status and rental-ready items.
Not automatically. A turnkey package can still have exclusions, assumptions or allowances. Buyers need to read the inclusions and contract documents carefully.
Variations can happen if the buyer changes selections, site conditions differ from assumptions, required works were excluded, or documents were incomplete at signing.
Fixed-price can help investors manage risk, but only if the scope is clear, the inclusions are complete and the buyer understands what is genuinely fixed.
Contract Review
Want help checking whether the numbers are genuinely fixed?
We help buyers compare fixed-price, turnkey and house and land opportunities by reviewing inclusions, risk areas, site cost assumptions and package structure before they commit.
Request a package review
Compare inclusions, pricing and risk before signing.
Request Investment OptionsDisclaimer
This page is general information only and does not constitute legal, financial, tax, investment or construction advice. Contract terms, inclusions and price risk vary by builder, project, site, land status and buyer circumstances. Buyers should seek qualified advice before signing.