Back to Glossary
Estimating & Bidding

Substitution

In Plain English

A request to use a different product than what was specified, which requires owner approval.

Definition

A substitution is a request by a contractor to use a product, material, or method different from what is specified in the contract documents. Substitutions require owner and designer approval and must be shown to be equal or better than the specified item. Approved substitutions may reduce cost or improve constructability.

Related Terms

Frequently Asked Questions

Need more than definitions?

Get AI-powered bid alerts, automated form filling, and proposal drafting.

Start Free Trial

© 2026 ConstructionBids.ai — A LaderaLabs Product