How to use a construction notice deadline calculator
Start with the date your team learned about the changed condition, delay, differing site condition, or other claim event. Select the notice window that matches the contract language you are checking. If the contract uses a different number, choose Custom and enter the whole-number calendar-day period.
The result is a planning date for the written notice. Record the date with the change event and check the contract's delivery method, recipient, required content, and any conditions that affect when the period starts.
Change order notice timing needs context
A change order notice deadline is part of a project record, not a detached date list. Teams need to see what changed, when it was discovered, who owns the response, and whether the evidence is complete. That context helps the commercial team review the notice before the operating window closes.
Use the calculator for a quick date estimate, then keep the working record in your normal project controls. ScopeLedger is built for specialty contractors that need changed work, notice timing, and evidence in one operating view.
AIA and ConsensusDocs defaults versus custom contract language
This page includes commonly referenced AIA A201-2017 and ConsensusDocs 200 periods as starting points. Project amendments, supplementary conditions, exhibits, flow-down terms, and negotiated clauses can change the period or the trigger. A custom construction contract notice period should be copied from the controlling contract text and checked by the responsible project or legal team.
Frequently asked questions
Does the calculator count business days?
No. It adds calendar days. If the contract uses business days, a different trigger, or a special delivery rule, follow that contract language instead of this estimate.
Can this replace a contract review?
No. It gives a quick date estimate for planning. The signed agreement and its amendments control the actual requirement.
What should I do after I see the date?
Link the date to the change event, supporting records, and accountable owner. Then review the notice content and delivery requirements before sending.