We have received your request for changes in the specifications of the _________________. I think the changes you have suggested will enhance the finished project, and I look forward to working with you on it. This letter will clarify the changes you have requested, and indicate the differences in cost and completion date due to those changes.
The changes you have requested are:
We will be happy to implement these changes for you. Doing so will have the following impact on project schedule and cost:
SCHEDULE: The completion date will need to be moved forward by _________________ weeks; revised estimated completion date is now _________________.
COST: Due to increased cost of labor and materials, the revised total cost will be _________________.
Please confirm your agreement to these changes by initialing one copy of this letter and returning it to me. Thank you for giving us this opportunity to be of service to you.