In late 1908, the five founders created a list of 300 individuals they would approach to become members, and by January 1909 there were 312 applications to join the club.

Directors elected to the first board were Haney, Somers, Ferguson, and McMahon from the founders group, as well as James Herbert Denton, Peter Charles Larkin, Maj Charles Alexander Moss, Thomas Saunders Hobbs, and James Frederick Martin Stewart.

William Raney, who led the group in favour of temperance, argued that the club should not create a possible policy conflict with the party.

[1] The club was granted a charter on 8 February 1909, and held its first board meeting on 26 March of that year.

On 5 January 1910, the club hosted its first banquet, and Sir Wilfrid Laurier was its guest of honour.

After the lease expired, in January 1911 the club moved into the Lumsden Building on Yonge Street.

[5]In 1910, Larkin, the chairman of the club's New Quarters Committee, began negotiating with the Standard Bank of Canada to acquire its head office building at 16 Wellington Street.

Once the sale was finalised, work began to raise money for the conversion of the building into a clubhouse.

Costs for the renovations were estimated at $80,000, therefore, the club issued $75,000 in 20-year five per cent gold bonds maturing in 1931.

[7] The first banquet at the new clubhouse took place in November 1913, and again Sir Wilfrid Laurier attended as the guest of honour.

While the exterior walls of the building were kept, the structure was otherwise gutted and rebuilt with new columns and floor beams.

To increase membership, that year the club created a new "junior member" category for gentlemen aged 21 to 29, with an amortised initiation fee and annual dues of $33 ($570 in 2023).

The sale included an agreement for the club to lease the top floor of the south building in the group.

[13] In May 1969, the club vacated its historic quarters and moved temporarily into the 19th and 20th floors of the Royal York Hotel.

[14] On Tuesday, 9 May 1972, Premier Bill Davis opened the new quarters in Commerce Court South.

The new clubhouse featured Louis XVI, Chippendale, Hepplewhite, and Queen Anne armchairs, Sheraton buffets, Persian carpets, 18th-century pewter chandeliers, silk draperies, Botticino marble walls, and 11-foot high beamed ceilings.

[18] In 1989, the Engineers' Club, which had been founded in 1895, made the decision to redevelop its clubhouse at 105 Victoria Street.

When the real estate market collapsed in January 1990, the club lost its building and was forced to find a new home.