How Do You Compare Construction Quotes Fairly?

Compare what each price buys before ranking the totals. Three builders can return three different prices because they have allowed for different work, information, access arrangements or responsibilities. A useful comparison puts those differences in front of the owner before a decision is made.

This guide explains how to compare builders’ quotes and construction tenders on a consistent basis. It applies to a defined refurbishment, fitout or construction package as well as a larger project. Start with the same scope, then clarify the differences, evaluate the outstanding items and record the reasons for the recommendation.

What belongs in the comparison?

Set up a comparison schedule with one column for each offer. Record the quotation date and reference, the drawings and specification priced, and any tender addenda acknowledged. Keep the submitted price visible throughout the exercise.

How do you make prices comparable?

Ask written questions about unclear items and record the answers against the relevant quotation. Request a confirmed price for omitted work where possible. Where it cannot yet be confirmed, show a separate evaluated allowance with its basis and uncertainty clearly identified. An unanswered item is not automatically a zero-cost item.

Do not overwrite the builder’s submitted amount with your own adjustment. The comparison should show the original offer, each clarification or adjustment, and the resulting evaluated total. Keep a separate list of unresolved risks that cannot sensibly be reduced to a dollar amount.

Apply the same evaluation criteria to each offer. If the scope changes, issue the relevant information consistently through the agreed tender process. A revised response based on a different brief should not quietly be compared with an earlier, unamended price.

Worked example: when the lower quote changes position

The following figures are illustrative only, in Australian dollars excluding GST. They are not market rates or a record of a Vanguard project. Assume both builders are being evaluated for the same required package.

Builder A initially appears $15,000 cheaper. With the two required items included on the assumed evaluation basis, its total is $5,000 higher. That is a reason to clarify the offers, not an automatic award decision. Confirm the allowances, check that the work is not counted twice and obtain written agreement on the final scope and price before appointment.

How should allowances and exclusions be treated?

A quote with a large allowance and another with a firm inclusion do not carry the same level of price certainty. Record what the allowance covers, its quantity or selection basis, and how the price will be adjusted under the proposed contract. Check whether associated installation, attendance, delivery and margin are included.

For an exclusion, identify the party responsible for the work and any resulting interface. For instance, a cheaper services offer may exclude a controls connection and commissioning witness tests. Seek a firm response and show any evaluation adjustment separately. Read our guide to scope gaps in construction tenders for the responsibility questions behind these omissions.

What can programme and design assumptions hide?

A price based on uninterrupted daytime access may not suit an occupied building that permits noisy work only outside normal hours. Similarly, a proposed start date may depend on a design approval or a long-lead item that has not been resolved. Compare the assumptions alongside the price rather than treating programme as a separate attachment.

Identify who completes the remaining design, prepares specialist details and resolves interfaces between trades. Record what the owner or consultants must provide and when. A design responsibility matrix can help make those boundaries explicit.

Does the lowest price win?

That depends on the client’s stated criteria. Relevant experience, delivery methodology, available capacity, safety, quality, programme and residual risk may affect value. Record how these considerations influence the recommendation. For public procurement, follow the applicable evaluation process and criteria; the government resources below explain their own procurement contexts.

Before accepting a quote: a final checklist

• Confirm the scope and document revisions included in the final offer.
• Close out the written clarifications, exclusions and outstanding prices.
• Check allowance assumptions, GST treatment, validity and payment terms.
• Confirm access, programme dependencies and responsibility for design interfaces.
• Record the remaining risks and the reasons for the preferred offer.
• Transfer the agreed scope, clarifications and changes into the appointment or contract documents.

The comparison schedule supports the decision. The final contract documents need to reflect the agreement. Keeping both aligned gives the owner and builder a clearer starting point for delivery.

How Vanguard Freadman can help

Vanguard Freadman and Team Vanguard support tender preparation, estimating, commercial coordination and client-side project management. We can help organise the pricing information, identify scope differences and prepare a comparison that explains the decisions still required. Explore our project experience or discuss your upcoming tender.

Sources and further reading

These government resources provide further guidance on tender information and evaluation in their respective procurement settings.

• Victorian Department of Treasury and Finance — tender documentation
• NSW Government — tender evaluation criteria