The Anton Wulff House, located at 107 King William Street in the King William Historic District a half mile from downtown San Antonio, is an Italianate house with a square tower, paired arch windows, and a circular bas-relief in the gable featuring a sculptured bust of Wulff's daughter Carolina, done by his son Henry. Wulff built this house around 1869 or 1870. The land was originally part of the grant made to Pedro Huizar in 1793 from the large area farmed by American Indians who lived at San Antonio de Valero Mission. Until the San Antonio River was diverted about 1926, it bordered the Wulff property, where a boathouse and bathhouse were situated. Part of the property on the Washington Street side was sold before Wulff died in 1894. His family lived in the house until 1902, when Mrs. Wulff sold it to Arthur and Elise Guenther for $7,000. In 1950 Elise Guenther's heirs sold the house to F. G. and Kathryn Antonio for $20,000. Mrs. Antonio made it into apartments. In 1964 a thin layer of pink stucco was applied to the house, and it was remodeled for use by the United Brotherhood of Carpenters and Joiners. It proved unsuitable for their needs, however. It was exempted from historic zoning when the King William Historic District was established in May 1968.
In 1974 the San Antonio Conservation Society undertook a campaign, headed by Walter Nold Mathis, to raise a fund of $100,000 to match a grant from the Sheerin Foundation to purchase the Wulff property. The cost of restoration ($250,000) was mostly paid for by a grant from the United States Economic Development Agency. In the fall of 1975 the Wulff house became the headquarters of the San Antonio Conservation Society, and that year the house was included in the King William Historic District. A Texas historic landmark medallion was placed on the house in 1976.