A three-story clubhouse of red brick with white trim under a high slate mansard roof. On the main front, a gabled center pavilion framed by tall white columns held a large window with an arched light above and an oval cartouche in the gable, over a pedimented entrance porch, and columned porches stood to either side. A rounded bay swelled out at the corner beneath a balustrade. Rows of dormers with arched windows and crossed railings lined the roof, an open lantern with a steep spire rose from the ridge, and tall chimneys stood at the ends. The side front ended in a gambrel-roofed wing with arched openings at the ground floor, and a long, plainer wing ran on down the street behind it.
The Union Club organized on November 27, 1891, and met at first in a rented stone-front house of 1888 at Jefferson and Park, 2354 Park Avenue. Its early members included Adolphus Busch of the Anheuser-Busch Brewing Company, William Taussig, who raised the money for the Eads Bridge, Calvin M. Woodward, who started the Manual Training School at Washington University, and the journalist D. M. Houser. The club built its own house at the southeast corner of Jefferson and Lafayette Avenues to designs by Weber and Groves, and it was completed on December 29, 1893. The Interstate Architect and Builder published two views of it. The club was still listed at the corner in 1907. The building was destroyed by fire on October 6, 1954. The Union Club Apartments now stand on the site.
