Step 1 — Isolate the scope delta
Price only what changed against the contract baseline — the added or deleted work — not the whole task. Tie the change to its driver: a bulletin, ASI, RFI response, owner directive, or field condition.
Step 2 — Price the delta
Cost the added labor, materials, and equipment for the changed scope, using your real rates. For deleted scope, credit it honestly — a fair credit builds trust for the next change.
Step 3 — Apply OH&P and a time impact
Add your overhead and profit per the contract’s allowed markup, and include a schedule/time impact if the change pushes the completion date. Time is a cost even when materials are not.
Step 4 — Get it approved before you build
Send a clear change order request and get a signature before the work proceeds. Verbal approvals are where contractors lose an estimated 3–5% of project revenue to unbilled work.
CMDBLD prices the delta by CSI division with your OH&P, drafts the change order, captures a legal e-signature, and auto-generates the invoice on approval — so approved changes actually get billed.