Simply replace the unfilled areas such as "" and "[date]" with your information.
Dear [potential client name],
Thank you for allowing me to place a bid with you regarding this project. I am very excited about this project, and feel that we at [name of company] would be a great fit on this project.,
My bid covers everything as originally listed on the building specs you provided. Of course, if there are any changes, please let me know and I will quickly rework my bid to give you a more accurate price.
Should you have any questions regarding anything in my bid, please don't hesitate to give me a call.
Thank you again for the bid opportunity. We look forward to hearing from you.