Construction Estimate Review: What It Costs, What You Get and When It Pays for Itself

An estimate gets its real review once: before the contract is signed or before money is released. After that, the leverage is gone and what is left is change orders and disputes. So the question is not whether a review is worth it, but what it costs compared with the error it can catch.

Six signs an estimate needs an independent review

1. The estimate is in the millions and nobody has time to go through it line by line.
2. Two bids for the same scope differ by more than you can explain.
3. Large allowances, lump sums or "misc." lines with no backup.
4. Quantities that were never checked against the drawings or a takeoff.
5. Markups, contingency or escalation applied without a clear basis.
6. The contract or draw has to be signed this week.

If two or more apply, a review will almost certainly pay for itself.

What an error costs: a worked example

An illustrative case. A $2.4 million estimate. One scope item is priced twice under two trades (1.5% of the total) and site-work quantities are not supported by the drawings (3% of a section worth one third of the estimate). That is about $36,000 plus $24,000, roughly $60,000 of overpricing. A trial review costs $100. Catching even one of the two pays for it hundreds of times over.

Your options

• In-house estimator. Knows the project, but is busy and reviews their own assumptions.
• Independent cost consultant or quantity surveyor. Deep review and professional accountability; fees and turnaround depend on scope.
• Lender's monitor. Reviews budgets and draws for the lender; their findings arrive on the lender's schedule, not yours.
• AI pre-review (MEXUM). Reads the whole document in hours: math, duplicates, missing scope, unit and quantity mismatches, inconsistent markups, cross-checks with drawings and contract. Each finding comes with the line and the reference. It does not replace a licensed professional; it gives them a prioritized list to start from.

The most cost-effective setup for most teams: an AI pre-review of the full document, then a professional resolves the five to ten findings with the largest dollar impact.

What you get

• A PDF report listing each finding by line: what is wrong, where, and the code or reference it relies on.
• Severity levels: critical, attention, informational.
• Estimated cost impact where it can be calculated.
• A plain-language summary for the decision-maker.

Pricing and how to order

Trial review: $100, one document, one-time, delivered within 48 hours. Plans: Basic $999 (up to 5 reviews, projects of 500–5,000 sq m), Standard $3,499 (up to 10 reviews), Premium $5,999 (unlimited reviews, priority processing). Prices are in US dollars. Compare plans.

1. Create an account and choose the project region, so the right codes are used.
2. Upload the estimate (PDF, XLSX, DOCX). Add drawings and the contract if you have them: quantities and payment terms are then cross-checked.
3. Get the report in your account and as a PDF.

What to do with the report

Do not forward the whole report. Pick the findings with the largest dollar impact and turn them into questions: "Lines 12–14 and 41–43 describe the same work. Why is it priced twice?" A good contractor corrects or explains. Vague answers to specific questions are information too.

What it does not do

An AI review reads documents, not the site: if quantities are inflated and the drawings do not show it, the document alone will not reveal it. It does not replace plan review, a licensed estimator, engineer or attorney. Its job is to find in hours what would take people days, and to show where to look first.

Frequently asked questions

How much does a construction estimate review cost?

At MEXUM a trial review of one document costs $100; plans for ongoing work start at $999. Independent cost consultants usually quote by scope, so their fees vary with the size and complexity of the estimate.

How long does an estimate review take?

The MEXUM report is delivered within 48 hours. The document itself is read in minutes; the rest of the time goes into preparing the reasoned report.

Does an AI estimate review replace a quantity surveyor?

No. It gives a quantity surveyor, estimator or lender a prioritized list of findings to verify, which makes their review faster. Professional judgment and accountability stay with them.

Is it safe to upload my estimate?

Documents are used only to deliver the review; how they are processed is described in the privacy policy.