Change Order

A formal document that modifies the original contract scope, cost, or timeline. Both parties must sign before the changed work begins. Change orders protect both the contractor and owner by creating a clear written record of what changed, why it changed, and how the cost and schedule are affected.

Whenever work changes from the original scope -- even if the cost is $0. Document everything. Common triggers include owner-requested additions, unforeseen site conditions, code changes, design errors, and material substitutions. A zero-dollar change order still protects you by documenting a scope modification and any schedule impact.

The "additional days" field extends the original completion date. Always negotiate schedule extensions alongside cost changes. If added work takes two weeks, request 14 additional days. Failing to document schedule impact can leave you liable for liquidated damages even when the delay was caused by the change.

Typically the contractor, owner, and architect or engineer of record. Get all signatures before starting changed work. Proceeding without signed authorization puts payment at risk. Some contracts also require the construction manager or a surety company representative to sign off.