Every experienced general contractor has a story about taking the low bid on a trade package and regretting it. The electrical sub who was $80,000 below everyone else but excluded the fire alarm system. The mechanical contractor who submitted the lowest number but qualified it with productivity rates that assumed zero congestion on a tight urban site. Effective bid evaluation is a skill that directly impacts your project's financial outcome.
Step 1: Verify Scope Completeness. Before comparing prices, verify that each bidder has included the complete scope. Create a scope checklist based on the drawings and specifications, and check each bid against it. Common areas of scope exclusion include temporary protection, cleanup, permits and inspections, testing and balancing, coordination drawings, and warranty periods beyond the standard one year. If a bidder excludes items that others include, you need to add those costs back before making a valid comparison.
Step 2: Normalize the Bid Format. Subcontractors submit bids in different formats. Some provide lump sums. Others break down by floor, by system, or by specification section. To make a valid comparison, you need to restructure each bid into a common format. ElkConstruct's bid leveling tool does this automatically, but if you're working manually, create a standard comparison template that captures labor, material, equipment, subcontractor costs, overhead, and profit separately.
Step 3: Evaluate Qualifications and Clarifications. The qualifications section of a subcontractor's bid is often more important than the price. Look for language about allowances, unit pricing for potential changes, escalation clauses, schedule assumptions, and payment terms. A bid that assumes a 12-month schedule duration has different cost implications than one assuming 18 months. Flag any qualifications that shift risk to the GC and either negotiate them out or price them into your comparison.
Step 4: Assess the Subcontractor's Capacity. A great price means nothing if the subcontractor can't perform. Check their current workload by asking for a list of active and committed projects. Verify their bonding capacity with their surety. Review their safety record through their EMR rating and OSHA logs. Call references from recent similar projects. A financially distressed subcontractor might submit an aggressive bid to generate cash flow, which creates significant performance risk for your project.
Step 5: Consider Total Cost of Engagement. The lowest bid isn't always the lowest cost. A subcontractor with a clean bid, good communication, a proven track record of minimal change orders, and a reputation for clean punch lists will likely cost you less in total project cost than a low bidder who generates claims, needs constant supervision, and leaves you with a lengthy deficiency list at turnover. Factor in your own project management costs when evaluating bids.
Step 6: Document Your Decision. Record why you selected each subcontractor, noting both the quantitative comparison and qualitative factors. This documentation protects you if bid results are questioned and creates institutional knowledge that improves future bidding decisions.