Notes:
The neo-Classical courthouse on Farnham Street is situated on what used to be the market square. Building commenced in 1824 under the superintendence of Williams & Cockburn of Dublin to the designs of William Farrell. It cost £11,000 - 12,000 to build.
The ashlar façade and single-storey tetrastyle Tuscan portico is of Latt Sandstone. This yellowish-grey, medium-grained Carboniferous sandstone is siliceous, durable and easily worked. It was extensively used in buildings in Cavan town. The squared rubble side elevation is of Drumelis Limestone, a fine-grained, grey Carboniferous limestone, and the round-headed window openings are dressed with cut Latt sandstone.
Alterations and additions to the building occurred in 1866. In the early 1930s the County Council made the decision to remove British emblems from the building, leaving the plinth at the top front of the building bare. A canon, presented to the town after the Siege of Sebastopol at the command of Queen Victoria, which stood on the front lawn, was also removed. The building was extended at the rear c. 1985; concrete, brick and slate were employed.

