Complex sentence: Two additional NCO quarters (Bldgs 31 and 32) were added to "soap-suds row" in 1897 and the distinctive cavalry barracks (Bldg 27), which now houses administrative offices, was constructed in 1899.
Split into simpler sentences: Two additional NCO quarters (Bldgs 31 and 32) were added to "soap-suds row" in 1897. The distinctive cavalry barracks (Bldg 27), which now houses administrative offices, was constructed in 1899.