Remarkable Estimating Blog|Estimating Tips

The Pre-Bid Estimate Review: A Checklist for Catching Errors Before You Submit

Most costly estimating errors are not mysteries. A missed addendum, a sheet that never got measured, a sub quote that quietly excludes half the scope: these are all things a second look would catch. The problem is that on bid day, nobody has time for a second look unless it is built into the process.

Get a Free Sample Estimate Read the article ↓

Remarkable Estimating ServicesAuthor

May 19, 2026Published

6 minRead time

Estimating TipsCategory

Estimating team reviewing spreadsheets and construction drawings together at an office table

Our earlier post on estimation mistakes that cost contractors thousands described the errors themselves. This article is about the process for catching them: a structured review you can run on any estimate, in the order that finds the most expensive problems first.

Why a Structured Review Beats a Quick Glance

An estimator who has spent days inside a project knows it too well to see it clearly. They remember measuring things they skipped, and they read numbers as they expect them to be. A reviewer working from a checklist does not carry those assumptions.

A structured review also makes quality consistent. When the review depends on who happens to be available, some bids get a thorough check and others get none. A written checklist means every bid gets the same minimum level of scrutiny.

Who Should Review the Estimate

The ideal reviewer understands estimating but did not build this estimate. In smaller firms, that might be an owner or project manager; in larger ones, a senior estimator. The estimator who built the number should be available to answer questions, but should not be the one signing off.

If nobody in-house has the time, an independent review by an outside estimating firm is another option, particularly on large or unfamiliar bids.

Stage 1: Documents and Scope

Start here, because a scope error outweighs any pricing error.

Is every sheet in the index accounted for in the takeoff?
Are all addenda acknowledged, and have superseded sheets been replaced?
Has the specification section for each scope item been read, not just the drawings?
Are alternates and unit prices requested in the bid form priced separately?
Is the scope statement consistent with the bid form's description of work?
Have RFI responses been incorporated?

Stage 2: Quantity Reasonableness

Checking every measurement again is rarely practical. Instead, test quantities for reasonableness:

Ratios. Compare quantities to building area. Drywall per square foot of floor, concrete per square foot of slab, devices per room. A ratio far outside your experience is worth a closer look.
Schedules. Door, window, fixture and finish counts should match their schedules.
Spot checks. Re-measure two or three high-value items from scratch.
Marked-up drawings. Flip through the takeoff markup looking for areas with no marks at all. Blank areas are often skipped areas.

Stage 3: Pricing

Are material prices current and tied to supplier quotes for volatile items?
Are waste factors applied once, and appropriate for the material?
Do labor productivity rates reflect this project's conditions (height, access, phasing, occupancy)?
Is the labor burden rate current?
Are prevailing wage rates applied if the project requires them?
Is equipment carried for the full duration the schedule implies?

Our labor cost estimating guide covers the labor side in detail.

Stage 4: Subcontractor Coverage

Subcontractor quotes are a common source of hidden gaps.

Is there a quote, or a self-performed number, for every scope in the bid?
Have quotes been leveled against the same scope, with exclusions listed side by side?
Has a number been carried for anything a chosen sub excluded?
Are quotes current, and do they cover the bid's schedule and any bonding requirements?
Is there a plug number for any trade with no quote, and is it reasonable?

Stage 5: Indirects, Markups and Math

Are general conditions sized for the actual schedule duration?
Are permits, testing, temporary utilities and cleanup assigned to someone?
Are overhead, contingency, bond, insurance and profit applied consistently with company policy?
Do the spreadsheet formulas total correctly, with no hard-coded numbers overriding calculations?
Does the bid form total match the estimate total?

Spreadsheet errors deserve special attention. A single formula that stops summing a column can quietly remove a whole division from the total.

Stage 6: Qualifications and Submission

Does the qualifications letter list inclusions, exclusions and assumptions clearly?
Are assumptions about unclear drawings stated so they can be clarified after award?
Are bid bond, insurance certificates and required forms complete?
Is the submission going to the right place, in the right format, before the deadline?

Running the Review When Time Is Short

Bid days rarely leave time for a leisurely review. A few practices help:

Stagger the work. Review scope and quantities as soon as the takeoff is done, before pricing is final. That leaves only pricing and math for bid day.
Prioritize by value. Spend review time on the divisions that make up most of the cost.
Use the same checklist every time, so reviewers do not have to decide what to check.
Lock numbers early. Set a cutoff after which only sub quotes and final markups can change.

Example: What a Review Catches

Imagine a hypothetical bid for a small retail building. The estimator's total looks reasonable per square foot. The reviewer, working through the checklist, finds that:

Addendum 2 added a canopy that never made it into the takeoff.
The storefront quote excludes installation of hardware that the specifications assign to that trade.
Concrete quantities are low relative to the slab area, because thickened slab edges shown in the structural sections were missed.
General conditions are sized for a shorter schedule than the bid documents require.

None of these would show up in a quick look at the total, because some errors push the number down and others up. Together, they could easily turn a winning bid into a losing job.

Building Review Into Your Estimating Workflow

The pre-bid review works best as one step in a consistent process, not an emergency measure. Our guide on preparing an estimate from plans shows where the review fits, and our article on improving estimate accuracy covers how review findings can feed back into better estimates over time.

Recording What the Review Finds

Reviews are most valuable when findings are recorded, not just fixed. Keep a short log for each bid:

What was found, and in which stage of the review.
Whether it increased or decreased the number.
The underlying cause: missed sheet, unread specification, pricing, formula, sub scope.

After a few months, the log shows patterns. If the same type of issue keeps appearing, it belongs in your takeoff template or estimating standards so it is caught earlier, or never happens at all.

Quick Red Flags for a Final Scan

When time is almost gone, scan for these:

A division that is much larger or smaller, per square foot, than on similar past projects.
Any trade carried with a plug number instead of a quote.
Sub quotes dated before the latest addendum.
Hard-coded numbers in cells that should contain formulas.
General conditions that do not match the schedule duration.
Alternates priced as deductions from a scope that is not in the base bid.

None of these proves an error, but each one deserves a second look before the bid goes out.

Conclusion

A pre-bid review is the cheapest insurance in construction estimating. Check documents and scope first, then quantity reasonableness, pricing, subcontractor coverage, markups and math, and finally the qualifications. Use the same checklist every time, and you'll catch the errors that matter while there is still time to fix them.

Frequently Asked Questions

How long should a pre-bid estimate review take?

It depends on bid size, but staging it helps: review scope and quantities as soon as the takeoff is complete, leaving pricing, sub coverage and math for the final hours.

Who should review a construction estimate?

Someone with estimating experience who did not prepare the estimate. The original estimator should answer questions but not sign off on their own work.

What is the most important part of an estimate review?

Scope coverage. Confirming that every sheet, addendum, specification section and bid-form item is accounted for prevents the largest errors.

Can an estimating service review an estimate I prepared?

Yes. Remarkable Estimating Services can provide an independent check of quantities and scope coverage on an estimate you have already prepared.

Every Estimate Gets a Second Review

At Remarkable Estimating Services, a second estimator reviews every estimate before delivery. Send your drawings, or send us your own estimate for an independent check before bid day.

Call (424) 441-4101 Request a Quote

Mon – Fri, 8:00 AM – 5:00 PM PST · Rush turnaround available

Get a Free Estimate

Send us your plans and we'll come back with a clear scope, a realistic turnaround, and a quote usually within 48–72 hours. Want to see our work first? Ask for a free sample estimate.

Prefer to send plans directly? Email info@remarkableestimating.com or call (424) 441-4101.