The new Assay Office building was designed to consolidate the organisation’s three principal processes—Hallmarking, Valuation and Laboratory functions—onto a single operational floor. This arrangement allows efficient workflow while maintaining clear visual oversight across all working areas, an essential requirement given the handling and verification of precious metals and gemstones. Given the nature of the work undertaken, involving precious metals and gemstones, the design prioritised clear lines of sight and physical oversight across the production spaces. This requirement informed the organisation of the internal layout, allowing processes to remain visually connected while maintaining appropriate working environments for each function. Alongside the production spaces, the building incorporates a Library and Silver Collection Room, providing a setting for the display and preservation of an extensive archive spanning more than 250 years. These spaces allow greater public engagement with the Assay Office’s historic collection. The architectural expression responds directly to the industrial character of the surrounding Jewellery Quarter alongside the requirements of the local Design Guide. Constructed primarily in Staffordshire blue engineering brick, the building presents a robust and crafted presence within its urban context. A repeating rhythm of openings wraps around three elevations, establishing a disciplined façade composition. The natural slope of the site subtly alters the proportions of these openings, culminating in a taller entrance volume that marks the building’s principal access. The fourth elevation forms a service yard, where four tall brick chimneys rise above the roofline, expressing the internal processes and referencing the area’s historic industrial landscape.