Comparing raw construction bid numbers without leveling them is one of the most common and most consequential mistakes in construction procurement. Bids from different GCs or different subcontractors for the same scope of work almost never cover exactly the same scope, they differ in what they include, what they exclude, what they assume about allowances and contingencies, and what qualifications or clarifications they attach to their prices. Selecting based on the raw number alone selects based on who excluded the most, not who priced the specified scope most competitively.
Bid leveling is the process of adjusting the raw bid numbers to a comparable scope basis, adding back the cost of excluded items, adjusting allowances to a consistent level, and evaluating the impact of each bidder’s qualifications, so that the selection decision is made on an apples-to-apples comparison of what each bidder is actually offering to provide.
What Makes Bids Non-Comparable
Scope exclusions. Every construction bid includes a list of exclusions, items that the bidder has chosen not to include in their price. Some exclusions are standard and expected (sales tax, design fees, permit fees, items that are typically the owner’s responsibility, not the contractor’s). Others are scope exclusions that represent work that is part of the project but that the contractor has priced separately or omitted entirely.
A GC who excludes site utilities from their bid is offering a lower price for a more limited scope. If the site utilities cost $350,000 and one GC excludes them while another includes them, the comparison of their raw bid numbers is misleading by $350,000. Bid leveling adds back the excluded scope at a consistent estimated cost so that both bids are compared on the same scope basis.
Allowances. An allowance is a budget amount included in a bid for a scope of work whose final cost is uncertain, typically because the specification is not yet defined in sufficient detail to allow a firm price. A bid that includes a $50,000 landscaping allowance and a bid that includes a $75,000 landscaping allowance are not comparable on their raw numbers, one includes $25,000 more for the same uncertain scope. Bid leveling establishes a single allowance amount for each allowance category and adjusts all bids to that common amount.
Unit pricing assumptions. Some bids include unit prices for work that will be measured and paid based on actual quantities, excavation, concrete, structural steel. If bidders assume different quantities for unit-priced work, their raw prices reflect different assumptions about the project’s scope, not different prices for the same work. Bid leveling applies consistent quantity assumptions to all bidders’ unit prices.
Qualifications and clarifications. Every bid includes a list of qualifications, conditions or assumptions under which the price was prepared. “Price assumes design to be substantially complete at time of bidding” is a qualification that affects what the bidder is committing to. “Price includes a 10% design development contingency to account for incomplete documents” is a different kind of qualification. Evaluating the practical effect of each bidder’s qualifications on the scope and risk they are accepting is part of the bid leveling process.
How Bid Leveling Works in Practice
The bid leveling process starts with a bid comparison matrix, a spreadsheet that lists the major scope categories across the top and the bidders down the left side, with each cell containing the bidder’s price for that scope category. The matrix immediately reveals where the bidders have priced differently, not just in their totals, but in specific categories where the differences are meaningful.
For each category where bids differ materially, the bid leveling process evaluates the cause: Is one bidder including more scope? Is one bidder using a different specification level? Is one bidder pricing from different subcontractor relationships that produce different market pricing? Has one bidder made an error in their estimate that produces an outlier price?
The adjustments applied to produce the leveled comparison: adding the estimated cost of excluded items to the bids that excluded them; adjusting all allowances to the owner’s target allowance level; and noting (but not numerically adjusting) qualifications that represent risk differences rather than scope differences.
The leveled bid comparison shows the owner what each bidder is actually offering, on a comparable scope basis. The decision can then be made on factors that reflect real differences: who has the most competitive pricing for the specified scope, who has the strongest relevant experience, who represents the best risk-adjusted value.
Common Bid Leveling Pitfalls
Accepting a low bid without investigating the cause. A bid that is 15% below the others warrants investigation, not rejection, but inquiry. Is the low bidder missing scope? Using a different specification assumption? Do they have subcontractor relationships that produce lower costs? Has the estimator made an error that will surface as a change order? The answers shape whether the low bid represents a competitive opportunity or a risk that will cost more in change orders than the apparent savings.
Over-correcting for allowances. Adjusting all bidders’ allowances to a single common level is appropriate for scope comparison purposes. But if one bidder has included a more realistic allowance based on better information about the likely final cost of the allowance scope, and the other bidders’ allowances are unrealistically low, the leveled comparison should note this risk rather than mechanically equalizing all allowances to an equally unrealistic level.
Ignoring qualifications that represent meaningful risk differences. A qualification that places design development risk on the owner is financially significant even if it doesn’t show up in the raw bid number. An experienced owner’s representative or construction manager identifies these qualifications and helps the owner understand their implications before the selection decision is made.
Innergy Integral manages GC and subcontractor selection processes, including bid leveling, as a core component of our owner’s representative and construction management practice.
Innergy Integral provides these services in Dallas, TX and across our six-state footprint.
Related: Owner’s Representative Services · How to Select a General Contractor · How to Evaluate a Construction Bid · Construction Management Guide
Markets: Owner’s Representative Seattle WA · Owner’s Representative Dallas TX · Construction Management El Paso TX