Warren Leland, Charles Leland, George E. Leland, and Lewis Leland bought the hotel in 1864. During this period of time, the Grand Union Hotel reached the pinnacle of its popularity and fame. The Leland brothers were already well-known hotel proprietors and also owned additional hotels in the area, such as Montgomery Hall. Under the direction of the Leland brothers, the hotel saw constant improvements and enlargements in order to respond to the growing competition in the hotel industry. The hotel grew to four stories with incredibly ornate interiors. The Leland brothers changed the hotel's name to Union Hall (1864) and then the Grand Union Hotel (1869). The exterior of the hotel morphed until it reflected the
Second Empire architectural style. This style was reflected in the ornate mansard roofs with slate shingles (added in 1870), cornices at the tops of the roofs and brackets under the eaves. There were four large rectangular towers with one being larger than the others by one floor and rotunda on the top. All four towers had
dormer windows on the top floor and flags flying high on the tops of each tower. There were classical columns along the piazza. The ornamentation was designed to make the structure appear huge, imposing, and expensive. The Leland brothers’ first order of business was to erect a 1,600 seat opera house on the grounds of the Union Hotel, near Federal Street. The Opera House opened on July 4, 1865, and
General Ulysses S. Grant, hero of the Civil War and subsequently President of the United States was present for the opening. On either side of the Opera House were erected what were called “cottages,” which were like private houses clustered together and provided private and spacious accommodations for the very wealthy. The dining room was one of the focal points of the hotel's design. The hall was expanded several times until it was able to seat 1000 people, the tables placed across the room at intervals of five feet and a 10-foot passageway down the middle of the room. The dining room was expanded after the Civil War years to serve up to 1,400 people at a time. A billiards room and reading-rooms were added in later expansions. Also, there was a wine storage room purported to be worth $50,000. In an advertisement in 1871, the Leland brothers write “This establishment is by far the largest and most complete hotel in the world, and with its various buildings, cottages, lawns, groves, and promenades, occupies seven acres of land comprising nearly an entire block of the town…four hundred large and airy rooms on the first and second floors, all rendered easy of access by Atwood’s vertical railway. Many of these in suites for the accommodation of families and several detached cottages, built and furnished expressly for family accommodations. Each cottage contains eight airy pleasant rooms with bath and closet. The banqueting room, an important feature of this establishment, has ample and sumptuous accommodations for 1,200. its enormous size—240 feet by 60, ceilings 25 feet high, lighted by 40 large windows and detached from the culinary department renders this superb apartment airy and pleasant at all times.” During this area, private baths were unheard of except for the extremely wealthy, and the Grand Union offered spacious bath houses with hot and cold showers, plunge and swimming baths. Concerts were held every morning on the piazzas of the Grand Union from 1865 on. Evenings were reserved for hops, afternoons for garden parties. Once a week there were children's garden parties. The Canfield Casino (“Morrissey’s Club House”) was built in 1862 by
John Morrissey and the
Saratoga Race Course opened in 1864. The two gambling locations were received with explosive fame, and attendance to Saratoga Springs and to the Grand Union Hotel increased exponentially. The additions on the building proved too expensive for the Leland brothers, and they declared bankruptcy on February 28, 1872. ==A. T. Stewart years (1872–1876)==