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DPR 523L (Rev. 1/1995)(Word 9/2013) State of California Natural Resources Agency Primary# DEPARTMENT OF PARKS AND RECREATION HRI # Trinomial CONTINUATION SHEET Property Name: 493 St. John Street Page 5 of 11 *B6. Construction History, Continued: In the 1860s, with the impending arrival of the railroad, large property owners in the vicinity of the Pleasanton town began subdividing property into lots and laying out streets. Owned by John Kottinger, the land bounded by Division Street on the south, the Arroyo del Valle on the north, and Main Street on the east was divided into a series of blocks and lots in 1868. This division includes the present-day St. John and St. Mary streets between Main and Division streets.1 According to the Sanborn maps of the area, the subject block and its surroundings were largely developed by 1888: Main Street had a series of commercial buildings while the side streets were mostly residential. Garatti Winery established a large facility to the northwest of the subject property by 1939 and became one of the largest businesses in Pleasanton in the mid-20th century.2 The winery complex was replaced by housing in the early 1990s.3 According to the material received from Museum on Main, the house at 493 St. John Street was designed and constructed in 1885 by Mr. Derendinger.”4 A newspaper announcement from 1881 states that Joseph Derendinger’s residence was about to be finished.5 The building first appears on the 1888 Sanborn map, so it was possibly constructed in the early 1880s. The 1888 Sanborn map illustrates a one-and-a-half story L-shaped dwelling with a full-width front porch and a side porch facing east. Three one-story accessory structures to the north were attached to the main house, the southernmost one was a water mill with a tank on the roof. A one-story shed was at the northern end of the parcel. On the 1893 Sanborn map, the attached accessory structures were noted as a tank house and an outhouse; and the northern shed was replaced with two henhouses. The layout of the parcel and the buildings had not changed in 1903. By 1929, a one-story dwelling was constructed immediately to the north of the main house: this one-story wood frame building was rectangular in plan and had a partial porch facing east. The outhouse and the water tank were removed from the main house, and the rear porch was expanded to be an L-shaped feature. By 1943, the layout of the parcel and the main house was modified significantly. The main house received an addition at the northeast corner, so its footprint changed from an L to a rectangle. A bay window was added to the west façade. The full-width front porch remained the same. The rear dwelling was replaced by a larger L-shaped one with a south-facing front porch. A one-story garage (or a carport) and multiple free-standing outbuildings were constructed to the north and northeast of the houses. According to the later Sanborn maps and aerial photographs, the layout of the site remained unchanged until at least 1963. The main house received multiple additions in the 1990s. The existing deck was expanded in 1995, and a small second-story deck with French doors was added to the front façade.6 The entry was altered, and a new gable roof projection was constructed at the front façade; new deck and railings were added ca. 2000.7 The configuration of the west façade was significantly altered, and it appears that the front deck supports were replaced. Dormers were added on the east and west sides of the rear gable. None of the outbuildings are extant today, only the main house and the rear dwelling stands on site.