The station was designed by GER engineer Edward Wilson and built by Lucas Brothers; the roof was designed and constructed by the Fairburn Engineering Company. The overall design was approximately Gothic, built using stock bricks and bath stone dressings. The building incorporated booking offices as well as the company offices of the GER, including chairman's, board, committee, secretary and engineers' rooms. The roof was spanned by four wrought iron spans, two central spans of and outer spans of 46 and 44 ft, in length over the eastern main lines, and long over the local platforms; the station had 10 platforms, two of which were used for main-line trains and the remainder for suburban trains. The station was built with a connection to the sub-surface Metropolitan Railway, with the platform sunk below ground level; consequently there are considerable gradients leaving the station. The Metropolitan Railway used the station as a terminus from 1 February 1875 until 11 July 1875; their own underground station opened on 12 July 1875. Local trains began serving the partially completed station from 2 October 1874, and it was fully opened on 1 November 1875, at a final cost of over £2 million. The original City terminus at Bishopsgate closed to passengers and was converted for use as a goods station from 1881. This continued until it was destroyed by fire in 1964. The Great Eastern Hotel adjoining the new Liverpool Street station opened in May 1884. It was designed by Charles Barry, Jr. (son of the celebrated architect Charles Barry who designed the Houses of Parliament). Upon opening, it was the only hotel in the City of London. An extension called the Abercon Rooms was built in 1901, designed by Colonel Robert William Edis. The hotel includes the Hamilton Rooms, named after former GER chairman Lord Claud Hamilton. Although initially viewed as an expensive white elephant, within 10 years the station was working at capacity (about 600 trains per day) and the GER was acquiring land to the east of the station for expansion. An Act of Parliament was obtained in 1888 and work started in 1890 on the eastward expansion of Liverpool Street by adding eight new tracks and platforms. This gave the station the most platforms of any London terminus until Victoria station was expanded in 1908. The main station was extended about eastwards; additional shops and offices were constructed east of the new train shed up to the parish boundary with Bishopsgate-Street Without. A new roof was built over the new construction. The outer wall was constructed with Staffordshire blue brick and Ruabon bricks.