✔ 最佳答案
The renovation of the "company" office will be carried out floor by floor.
或者
The renovation of the "company" office will be carried out one floor at a time.
當然最好是詳細列出每層的裝修時間表:
The renovation schedule of the "company" office floors will be as follows:
X/F: Jun 2015
Y/F: Jul 2015
Z/F: Aug 2015
以上寫法是假設作為內部通告簡述,所有同事已經知道公司有幾層要裝修。