Range attached to left of the Porth Hotel

The building is a hotel, constructed with stucco and slate roofs. It features a two-storey front that consists of three distinct sections: two are finished in matching stucco and roughcast, while the third, which was formerly an assembly room and coach-house, is roughcast. The first two sections have four windows each, with rusticated, unpainted stucco ground floors and similar rusticated surrounds for the upper windows, set against painted roughcast. The right section includes 12-pane sash windows and a door in the second bay, featuring a timber corniced doorcase with part-fluted pilasters. There is an overlight with the word 'Porth' in gilded letters. The central section is slightly taller, with roughcast end stacks, 4-pane sash windows, and a door in the right bay. It has a broad doorcase with console brackets, a 4-panel door, sidelights, and overlights, along with a disk marked 'CTC' affixed to the upper wall, suggesting this may be the earliest part of the building.

The service range has seven windows and is finished in painted roughcast, featuring 12-pane sashes in the assembly room and one above a loading door in the fifth bay. The ground floor includes four altered former coach entries, now glazed, along with a door and a window. Beyond this is a lower two-storey section with two windows and a hipped roof. The rear of the service wing consists of a three-storey, six-window rubble stone range with a partially blocked large carriage arch and an altered ground floor. Extending from the angle is a tall three-storey, five-window rubble stone range, which may have been a former warehouse or mill, featuring stone window heads and 20th-century 12-pane windows on the upper floors, along with a ground floor door and various blocked openings.

The rear of the central block has a three-storey structure with a large gable to the left, while the southern end block features a three-storey rear wing with three windows facing the old Vicarage.

The central block may represent the 'new hotel' built on the site of the Porth Inn, which was noted for its imposing facade in a report by the Carmarthen Journal in 1863, with the remainder of the building added later. The scale of the range behind the service wing suggests it may have originally been a woollen mill.