In 1866 Loveland extended the first floor the rest of the way to the rear property line and built a full second story addition as well.

According to the Colorado Transcript newspaper, about $5,000 in case plus town lots were pledged "to influence the removal of the Capital to Denver."

The only known clue offering insight into this claim was published by George West, editor of the Transcript, on February 4, 1874: "Now that the question of removing the capital has again come up - having passed the lower house by a vote of sixteen for to seven against - Mr. Lawrence, the interpreter of the Council, will have another show for his influence.

In 1878 the upper floor became the emergency home of the Colorado School of Mines and Jarvis Hall after their original campus was attacked by an arsonist.

In 1905 Koenig hired contractor Perre O. Unger to convert the original arched lower story entrance into a plate glass storefront with ornamental corner support column, and also installed the building's signature 2-ton Diebold safe.

In 1941 the plate glass storefront was extended partially along the south side of the building and clerestory covered.

After a nearly catastrophic fire gutted the rear upper floor with water heavily damaging the rest of the building on November 3, 2005, the interior was stripped completely and building thoroughly reinforced, a new rear replacement roof installed, and new more historically accurate upper story windows installed.

The distinctive row of chimneys on the 12th Street side, mostly missing since being pared down due to chronic wind damage in 1933, were restored, making the building look more historic after the fire than it did before.

The result was the new Coors Building, a two-story storefront with tile mansard half third floor designed by the Baeressen Brothers of Denver and built by contractor Perre O. Unger.

In 1907 German immigrant Albert Treffeisen moved his north side grocery store here, where it remained as the City Market for many years.

In 1992 it was renovated to an approximation of its original appearance, and its interior space merged with the Loveland Block to become part of the restaurant.