Various plans were commissioned from the Bridge Architect, Martin Bulmer, and after receiving Charity Commission approval for the estimated expenditure of £3,200, the Wardens and Assistants finally approved the plans in January 1878. Construction by Messrs. Foord and Sons began in June 1878, and the first meeting of the Court of Wardens and Assistants in the new Bridge Chamber took place on 9 April 1880.
Unfortunately, Martin Bulmer died before the completion of the building, which may have been his last commission. The commemorative panel, which hangs in the entry hall of the Bridge Chamber, records not only the names of the Bridge Clerk and the Wardens and Assistants, but also pays special tribute to the contribution of Martin Bulmer. As well as serving for over 20 years as Bridge Architect, he was County Architect from 1860 to 1878 and designed numerous buildings in Kent, including Detling School and the Faversham Assembly Rooms.
In January 1876 the Corporation of Rochester, who had obtained the lease to The Queen’s Arms Public House adjacent to the old Bridge Chamber, announced its intention to pull down the public house and construct a new road now known as Castle Hill. The removal of the building, however, revealed an intermingled boundary between the Bridge Chamber and the public house.
The Wardens and Assistants first resolved to build a new boundary wall to support the overhanging first storey of the Bridge Chamber, but by March 1877 they had purchased from the Earl of Jersey the freehold of the site of the former public house and had decided to tear down the old Bridge Chamber and build a new, larger building on the combined site.
Today the Bridge Chamber is a listed building with the following architectural description:
“Entrance hall with trustees’ Board Room above, central stair to rear, other principal offices, 1st floor S, 2 storeys. An informal composition but presenting a symmetrical front to Esplanade: parapet with coping and cornice string rises to form a stepped gable above central combined porch and oriel; canted porch with large doorway under hood mould, half glazed double doors with tracery bars, and single-light square-headed side windows; narrower 1:4:1 light oriel with transom, and leaded roof. Later 2-light ground floor window to left. Right return (to Castle Hill); irregular elevation with canted wing to right (with single-light windows under hood moulds to 1st floor, and without hood moulds to ground floor) connected by plain angled stair turret to lefthand bay with 3-light window to each floor; parapet with central stepped gable over this bay continues over wing. Rear with stair turret and large 3-light transomed window lighting stairs. Interior: good joinery, open well stair, panelling to Board Room, and ceilings. One stone C16-style fireplace.”