The Welland County Court House was designed by Kivas Tully, one of Canada's leading architects who is noted for his pleasing proportions found in all of his Ontario Court Houses. Designed in a Neo-Classical style and three storeys in height, the building's front fa�ade is dominated by a monumental pediment which is supported by four Ionic columns that rise from the second storey porch and are flanked by twin staircases.

Built with Queenston limestone of an even coursing, the structure has numerous features worthy of note. The second floor has projecting pediments and brackets over all windows while the windows found on the third level are trimmed by a stone moulding with earred blocks and keystones. Continuous sills underscore both second and third floor structural openings.

The main entranceway is topped by a stone tablet and flanked by windows which have curved pediments. Such a variety in window pediments and mouldings is rare and seldom found. A decorative frieze provides a base for the low-hipped roof upon which sit two cupolas.

Originally, two small cupolas sat on either side of a large octagonal cupola which is capped by a domed roof.