Located in the Fort Defiance vicinity of Augusta County, Black Oak Spring is a two-story brick house dating to ca. 1820. Black Oak Spring’s distinctive brickwork and architectural elements embody the characteristics of the Colonial-, Georgian Early Republic-, and Victorian-era styles. The house has a symmetrical three-bay front, a metal-sheathed side-gable roof, a stone foundation, wood-sash windows, and gable-end brick chimneys. The front entry, with its fanlight and richly ornamented surround, is sheltered by a small Victorian-style porch. Black Oak Spring is a significant example of two architectural themes: the blending of stylistic influences in the domestic architecture of Augusta County and the region during the early 19th century, and the influence of technomorphism in architectural expression. Stylistically, Black Oak Spring’s interior blends the Georgian and Federal styles with technomorphic detail, an approach in which the design strongly expresses the technology used to create it. Technomorphism is usually associated with the latter part of the 19th century, when machine production imparted a specific look to architectural elements. The kind of pre-mechanized technomorphism seen at Black Oak Spring is present in a ca. 1842 Rockbridge County house known as Chapel Hill.