The building had fallen into disrepair.
Much of the old building was still in disrepair.
to fall into disrepair - прийти в упадок, обветшать
the building was in bad disrepair - здание сильно обветшало
ветхость, обветшалость, плохое состояние; неисправность
to fall into ~ - прийти в упадок, обветшать
the building was in bad ~ - здание сильно обветшало
• Couple going after 2D rides in a state of neglect (9)
• Dilapidated condition
• Neglected state
• Unsoundness
• In need of repairs