Geotechnical, Structural & Civil engineering — Brisbane & Queensland
Cost Estimation Guide
A reliable estimate helps you decide what to build, set a budget and compare tenders. This guide explains the types of estimate we prepare and what each one is good for.
Start here
Quantities are only as good as the understanding of what is being built.
Because we design structures, our take-offs reflect real member sizes, reinforcement and footings — not rough rates per square metre. Estimates clearly list assumptions and exclusions.
Comparison
An overview only. Every entry below is described cautiously and is not an engineering limit; suitability is always confirmed against site-specific data.
| Estimate types | Best suited to | Key consideration |
|---|---|---|
| Preliminary estimate | Feasibility and early budgeting. | Based on concept layout and typical structural systems. |
| Quantity take-off | Builders pricing a job and owners checking quotes. | Measured from structural and architectural drawings. |
| Bill of quantities (BOQ) | Tenders and comparing builder prices. | Structured by trade and element. |
| Steel & concrete quantities | Fabricators, suppliers and builders. | Taken from the design or shop drawings. |
Estimate types
The level of detail matches the design stage.
Estimate type 01
Early budget estimate from concept drawings.
Feasibility and early budgeting.
Based on concept layout and typical structural systems.
Accuracy improves as the design develops.
Estimate type 02
Measured quantities of concrete, steel, reinforcement, timber and earthworks.
Builders pricing a job and owners checking quotes.
Measured from structural and architectural drawings.
Depends on the completeness of drawings.
Estimate type 03
Itemised schedule of works for tendering and cost control.
Tenders and comparing builder prices.
Structured by trade and element.
Rates may be added by the client or builder.
Estimate type 04
Tonnage of steel, reinforcement and concrete volumes.
Fabricators, suppliers and builders.
Taken from the design or shop drawings.
Allowances for waste are stated separately.
Selection considerations
These factors tend to narrow the options faster than any single test result. Every recommendation remains site-specific and subject to the available data.
Method
Scope is adjusted to the project, the risk and the information already available.