Complex sentence: The 1929 Evanston and Oak Park stores were closed as well in 1986, deemed out of date and too costly to operate, but, in 1987, a major restoration and renovation of the State Street flagship commenced.
Split into simpler sentences: The 1929 Evanston and Oak Park stores were closed as well in 1986, deemed out of date and too costly to operate. But, in 1987, a major restoration and renovation of the State Street flagship commenced.