Writing an appreciation letter for project completion is as easy as any thank you letter, as there are times when you have to appreciate your employees or the city mayor for completing their projects on time and effectively.
Start the first paragraph by expressing your appreciation for the recipient, telling him/her that you are happy with the completion of the project. The opening paragraph should only stick to why the appreciation was written and there is no need to add details of the project. However, you can briefly say how the completion of the project helped you.
In the second paragraph, explain the background of the project. You can say that the project was very crucial for both of you and its completion solved several issues. Mentioning the issues that were solved after the completion of the project is good, as it makes the reader know how important the project was for the sender of the letter.
Conclude the letter by thanking the recipient once again and say that you look forward to getting the same response from him/her in the future.