How Does the Construction Submittal Review Process Work?

The submittal process is how the contractor proves that the materials, equipment, and shop drawings they plan to use match what the specifications require — and how the design team verifies that before anything is ordered or installed. The contractor submits product data, samples, and shop drawings; the engineer or architect reviews each against the contract documents and returns it stamped approved, approved-as-noted, revise-and-resubmit, or rejected. The process exists because specifications describe requirements, not specific products — the contractor chooses the actual manufacturer and model. Without submittal review, that choice happens in a vacuum, and the first time anyone checks compliance is when the wrong equipment arrives on a truck.

It starts with the submittal schedule, prepared early in construction, listing every required submittal and its timing relative to procurement lead times. Long-lead equipment — switchgear, chillers, elevators — gets submitted first because its approval gates ordering and its delivery gates everything downstream. Each submittal arrives with the contractor's own review stamp first — the contractor must check it before the designer sees it. The design team reviews for conformance with the contract documents: capacities, ratings, dimensions, listings, and coordination with related systems. The returned stamp dictates next steps, and the whole cycle is logged so nothing falls through. On MEP-heavy projects, the engineer's submittal review is where system compatibility gets verified — the chiller, pumps, and controls all have to work as a system, not just as compliant individual products.

Submittals delay projects when they're treated as paperwork instead of procurement gating. The practices that keep review moving.

• Build the submittal schedule around procurement lead times — longest lead items submitted first
• Require the contractor's review stamp before design review; unreviewed submittals get returned unchecked
• Submit complete packages: partial submittals for interdependent systems can't be properly reviewed
• Track every submittal in a log with dates — lost submittals are a top source of schedule disputes
• Reserve the full contract review period in the schedule; don't plan procurement on optimistic turnaround
• Treat revise-and-resubmit as a failure to prevent — coach the contractor on what complete looks like