Hillside Avenue Historic District
U.S. National Register of Historic Places
U.S. Historic district
New Jersey Register of Historic Places
Colonial Revival house at 999 Hillside Avenue
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Location	Hillside Avenue from Watchung Avenue to Martine Avenue Plainfield, New Jersey
Coordinates	40°36′55″N 74°24′18″W / 40.61528°N 74.40500°W / 40.61528; -74.40500 (Hillside Avenue Historic District)
Area	27 acres (11 ha)
Architect	Alexander Milne
Architectural style	Colonial Revival, Queen Anne, Shingle Style
NRHP reference No.	82003307[1]
NJRHP No.	2699[2]
Significant dates
Added to NRHP	June 1, 1982
Designated NJRHP	October 15, 1980

The Hillside Avenue Historic District is a 27-acre (11 ha) historic district located along Hillside Avenue in the city of Plainfield in Union County, New Jersey. It was added to the National Register of Historic Places on June 1, 1982 for its significance in architecture, featuring Colonial Revival architecture. The district includes 33 contributing buildings.^[3]

History and description

The houses in this residential district were built in the first quarter of the 20th century. Many feature Colonial Revival architecture. Some houses built earlier have Queen Anne and Second Empire styles. The two and one-half story house at 999 Hillside Avenue was built by architect Alexander Milne in 1907 for William A. Conner. It is a replica of the Longfellow House in Cambridge, Massachusetts.^[3]