Definition: The intrinsic visual and physical qualities of built structures. These fall broadly into two types: the conscious design intent as envisaged by an architect, or by a builder/architect incorporating/copying architectural styles and detailing; and the honest appeal of more modest forms of buildings. This may include the humble, vernacular architecture of local craftspeople or the forthright, practical appearance of utility, transport, communication, military or defence structures.

Factors that might affect the level of the value include:

• the intactness of historic fabric and detailing / the level of alteration and loss
• the quality of the design / association with a known architect
• the quality of the craftsmanship
• the rarity of the structure type
• construction techniques used, technological innovation incorporated, the use of materials
• the age of the structure
• local landmark status
• group value with other assets

For example, the cottage below has high architectural value due to the quality of its design and reflection of period detailing. The building is a west facing detached property, formerly two semi-detached cottages, in large lawned grounds, with trees and shrubs to south and rear. Each cottage is built in the Gothic revivalist style that was prevalent in the mid to late 19th century. Features reflecting this style include the large central chimney stack with four pots, diamond-leaded windows, and the two gables in the west face of the roof which are in line with the original entrances. The building is two storeys in height and the roof is low-pitched, covered by slate tiles and with a large eaves overhang on the gable end. The elevations are in distinctive Flemish bond brickwork with dark headers, giving a polychromatic finish. The value is further enhanced by the intactness of historic fabric and detailing.