Complex sentence: The hotel was then renovated from 2000 to 2002 and an addition, which was to have originally had 38 floors but then reduced to match the height of the existing hotel, was constructed to the east.
Split into simpler sentences: The hotel was then renovated from 2000 to 2002. An addition, which was to have originally had 38 floors but was then reduced to match the height of the existing hotel, was constructed to the east.