如何翻译"古建修缮、改造、扩建”，单词即可。。。

古建修缮: restoration, renovation
改造: rebuilding
扩建: expansion, extention

修缮、改造、扩建remedy/restructure/expand（名词＋ing）
古建ancient buildings
古迹historic site

remedy,rebulid and enlarge of the ancient architecture

rebuild?