5, Cross Street

No. 5 Cross Street in Helston was built in 1788 as the Helston Union Bank and later served as a lawyer's office. It was used by Humphry Millet Grylls, a solicitor who managed the Duke of Leeds' estates, and it continues to operate in the same legal practice today. The building features elvan ashlar stone with granite dressings, including a plinth, sills, quoins, lintels, and jamb stones. It has a grouted scantle slate roof, with brick end stacks and a lateral stack at the rear left. A cast-iron ogee gutter is also present. The building has a double-depth plan with rear wings and stands three storeys tall, displaying an irregular front with three bays.

The original or early 19th-century hornless sash windows, which include a second-floor bowed sash with a decorative iron balcony, are notable features. The entrance is located at the far left and consists of a pair of two-panel doors beneath a Tuscan porch with an entablature and a moulded cornice supported by paired columns. On the left-hand side of the stair wing, there is an unusually tall original stair window featuring glazing bars and a fanlight head, along with various original sash windows at the rear.

Inside, the property boasts an open-well staircase with a ramped handrail and stick balusters, six-panel and some two-panel doors, and two early 19th-century marble chimneypieces with later iron grates.