In the law regulating historic districts in the United States, a contributing property or contributing resource is any building, object, or structure which adds to the historical integrity or architectural qualities that make the historic district significant. Government agencies, at the state, national, and local level in the United States, have differing definitions of what constitutes a contributing property but there are common characteristics. Local laws often regulate the changes that can be made to contributing structures within designated historic districts. The first local ordinances dealing with the alteration of buildings within historic districts was enacted in Charleston, South Carolina in 1931.
Davenport City Hall is the official seat of government for the city of Davenport, Iowa, United States. The building was constructed in 1895 and is situated on the northeast corner of the intersection of Harrison Street and West Fourth Street in Downtown Davenport. It was individually listed on the National Register of Historic Places in 1982 and on the Davenport Register of Historic Properties in 1993. In 2020 it was included as a contributing property in the Davenport Downtown Commercial Historic District.
The Henry Berg Building is a historic building located in downtown Davenport, Iowa, United States. It has been individually listed on the National Register of Historic Places since 1983. In 2020 it was included as a contributing property in the Davenport Downtown Commercial Historic District.
The Renwick Building is a historic building located in downtown Davenport, Iowa, United States. It has been listed on the National Register of Historic Places since 1983, and on the Davenport Register of Historic Properties since 2000. In 2020 it was included as a contributing property in the Davenport Downtown Commercial Historic District. It is known locally for the large painted sign on the north side of the building depicting the Bix 7 Road Race.
The Fifth Street Bluff Historic District is a nationally recognized historic district located in Ottumwa, Iowa, United States. It was listed on the National Register of Historic Places in 1998. At the time of its nomination it contained 67 resources, which included 40 contributing buildings, three contributing structures, and 24 non-contributing buildings.
The Vogel Place Historic District is a nationally recognized historic district located in Ottumwa, Iowa, United States. It was listed on the National Register of Historic Places in 1995. At the time of its nomination it contained 158 resources, which included 101 contributing buildings, six contributing structures, and 51 non-contributing buildings.
The West Liberty Commercial Historic District in West Liberty, Iowa, United States, is a historic district that was listed on the National Register of Historic Places in 2002. At that time, it included 41 contributing buildings, six other contributing structures, and eight non-contributing buildings.
The Downtown Commercial Historic District encompasses most of the central business district of Burlington, Iowa, United States. It was listed on the National Register of Historic Places in 2015. The historic district includes 65 properties that were part of a 2012 to 2013 survey of the area. It also includes as contributing properties the buildings in the West Jefferson Street Historic District and three buildings in the Manufacturing and Wholesale Historic District that were previously listed on the National Register. All total there are 122 resources within the district, which includes 108 contributing and 14 non-contributing properties.
The State Center Commercial Historic District is a nationally recognized historic district located in State Center, Iowa, United States. It was listed on the National Register of Historic Places in 2002. At the time of its nomination it contained 36 resources, which included 31 contributing buildings, two contributing structures, and three non-contributing buildings. The historic district covers the town's central business district. State Center is located at the highest point in Marshall County, midway between Marshalltown and Nevada. The town was established by the Cedar Rapids & Missouri Railroad on 80 acres (32 ha) of land in 1863. It was initially named "Centre Station," but William Barnes, the first railroad agent, changed the town's name to "State Centre."
Winterset Courthouse Square Commercial Historic District is a nationally recognized historic district located in Winterset, Iowa, United States. It was listed on the National Register of Historic Places in 2015. At the time of its nomination the district consisted of 82 resources, including 74 contributing buildings, seven noncontributing buildings, and one noncontributing object. The historic district covers most of the city's central business district in the original town plat. Most of the buildings are two-story, brick, commercial buildings. The commercial Italianate style is dominant, with Queen Anne, Romanesque Revival, and Neoclassical styles included. The Madison County Courthouse (1878) is a Renaissance Revival structure designed by Alfred H. Piquenard. Most of the buildings are brick construction, but four were constructed using locally quarried limestone. The stone buildings include the courthouse, the White, Munger and Company Store (1861), and the Sprague, Brown, and Knowlton Store (1866), all of which are individually listed on the National Register.
The McGregor Commercial Historic District is a nationally recognized historic district located in McGregor, Iowa, United States. It was listed on the National Register of Historic Places in 2002. At the time of its nomination the district consisted of 60 resources, including 51 contributing buildings, one contributing site, one contributing structure, and seven noncontributing buildings. Unlike most river towns in Iowa the central business district does not follow along the Mississippi River, but moves away from it. It is linear in shape, following Main Street, which runs from the southwest to the northeast in a narrow valley between two 400-foot (120 m) bluffs. The narrow valley ends at the river.
The McClanahan Block is a historic building located in Iowa Falls, Iowa, United States. The city experienced a devastating fire in 1874, and most of the buildings on this block were built after the fire giving them a commonality of design. This two-story commercial building, completed in 1913, stands out given its polychrome brick and the simplicity of its design. Its decorative elements are found in the patterns created on its surface utilizing the bricks. At the time this building was constructed, Washington Avenue was paved and cement sidewalks replaced their wooden predecessors.
The Eldora Downtown Historic District is a nationally recognized historic district located in Eldora, Iowa, United States. It was listed on the National Register of Historic Places in 2009. At the time of its nomination the district consisted of 84 resources, including 65 contributing buildings, one contributing site, three contributing objects and 15 non-contributing buildings. The district takes in the city's central business district, which also includes its governmental, educational, and religious activities. It is located in the original town plat from 1853. Development began around the public square and spread out from there. The present building stock is second generation at the earliest. The oldest extant buildings were built in the 1870s, although the greatest number of buildings were constructed in the 1890s. There were also peak years of construction in the 1910s, and the late 1930s and 1940s. The commercial buildings generally range from one to two stories, but the tallest structure is three stories in height. They are primarily composed of brick construction. Late Victorian and various revival styles from the late 19th and 20th centuries are dominant. The non-commercial buildings include four government buildings, four churches, three residences, a hospital, and a school.
Old Main Street Historic District is a nationally recognized historic district located in Dubuque, Iowa, United States. It was listed on the National Register of Historic Places in 1983. At the time of its nomination it consisted of 33 resources, which included 30 contributing buildings and three non-contributing buildings. In 2015 the boundaries were increased to include five more buildings. Four of the buildings are contributing properties that were excluded from the original district because they were slated to be torn down as a part of the expansion of U.S. Route 61. While the highway was built the buildings were spared. The fifth building is non-contributing as are three structures.
Washington Residential Historic District is a nationally recognized historic district located in Dubuque, Iowa, United States. It was listed on the National Register of Historic Places in 2015. At the time of its nomination it consisted of 327 resources, which included 262 contributing buildings, 61 non-contributing buildings, and two non-contributing objects. This is one of the early residential areas of Dubuque, and was home to its German community. It also defines the "walkable city" with commercial, industrial, and institutional buildings located here. There are a number of churches in the district from various denominations. Of particular interest are St. Mary's Catholic Church (1866), St. John's Lutheran Church (1880), and St. Matthew's Lutheran Church (1908). A significant number of the buildings were constructed in brick, and the vast majority of the buildings in the district were built by 1891. Vernacular structures are commonplace here, as are various Victorian styles. Hollenfelz House (1891) and the Dubuque Casket Company building (1894) are individually listed on the National Register. The former St. Mary's Catholic Church complex forms its own historic district within this one.
The Saint Louis Downtown Historic District is a commercial historic district located on North Mill Street, West Saginaw Avenue, and West Center Avenue in Saint Louis, Michigan It was listed on the National Register of Historic Places in 2014. The district is surrounded by residential neighborhoods, and is still the commercial center of Saint Louis.
The Brown Street Historic District is a nationally recognized historic district located in Iowa City, Iowa, United States. It was listed on the National Register of Historic Places in 1994, and its boundaries were increased in 2004. At the time of the boundary increase it consisted of 246 resources, which included 201 contributing buildings, one contributing structure, and 44 non-contributing buildings. Brown and East Ronalds Streets are both part of the city's original plat when it was laid out as the capitol of the Iowa Territory. They are located on the north edge of the plat. Its significance is derived from the settlement patterns here, the development of a major transportation corridor, the neighborhood's affiliation with the University of Iowa and its growth around the turn of the 20th century, and the architectural styles and forms that are found here from the 1850s to the 1920s. Many of the city's Bohemian-immigrant population lived here. Businessmen and blue-collar workers lived side by side to each other, as did professors from the University of Iowa. The old Military Road was routed on Brown Street, and after it was paved with bricks in 1907, it became the preferred route for funeral processions to Oakland Cemetery.
The Marion Commercial Historic District is a nationally recognized historic district located in Marion, Iowa, United States. It was listed on the National Register of Historic Places in 2009. At the time of its nomination it consisted of 41 resources, which included 29 contributing buildings, one contributing site, one contributing structure, two contributing objects, and eight non-contributing buildings. The historic district covers the city's central business district. The development of this area largely occurred when Marion was the county seat of Linn County (1838-1919). There are no county government buildings extant from this era. The city was also a division point for the Chicago, Milwaukee, St. Paul and Pacific Railroad in the late nineteenth and early twentieth centuries.
The Decorah Commercial Historic District is a nationally recognized historic district located in Decorah, Iowa, United States. It was listed on the National Register of Historic Places in 2017. At the time of its nomination it contained 126 resources, which included 85 contributing buildings, one contributing structure, and 40 non-contributing buildings. The historic district covers most of the city's central business district. Water Street, which is a major thoroughfare through the district was named after a millrace (non-extant) that rerouted water from the Upper Iowa River to serve the needs of the mills and the commercial district. The land here is relatively flat and allowed for a linear shopping area. The Broadway–Phelps Park Historic District is largely a residential area that is located to the south.
The West Side Residential Historic District is a nationally recognized historic district located in Washington, Iowa, United States. It was listed on the National Register of Historic Places in 2018. At the time it was studied for the State of Iowa it contained 255 resources, which included 184 contributing buildings, one contributing site, one contributing structure, one contributing object, and 68 non-contributing buildings. Some of the numbers could be adjusted up for the National Register nomination as the park required further study. The historic district is a residential neighborhood on the west side of town with houses that were built from the 1850s to the 1960s. The oldest house in the district was constructed in 1856, and eight of the houses were built after 1969, the cut-off year for inclusion as a contributing property. All of the houses are single family dwellings, and most of them are frame construction. Nine of the houses are brick or stucco. They range in height from single-story to two-story structures. The district is noteworthy for its large collection of Victorian styles from the 1880s to the 1900s, but there are also a number of American Foursquare, American Craftsman, and bungalows in the neighborhood as well. The Joseph Keck House and the Frank Stewart House (1894) are individually listed on the National Register of Historic Places.
