Silverton City Zoning Code
§ 153.09
R-1 SINGLE-FAMILY RESIDENTIAL DISTRICT.
(A) Purpose. The purpose of the R-1 Single-Family Residential District is to retain and continue an existing suburban residential character, and to encourage the maintenance of single-family detached dwellings and individual multi-family structures in areas where appropriate community facilities are available and urban services can be efficiently provided.
(B) Permitted uses. A building or lot within an R-1 Single-Family Residential District shall be used only for the following purposes:
(1) A detached single-family dwelling;
(2) A small residential facility; and
(3) Public park and recreation facilities.
(C) Conditional uses. The following conditional uses may be approved in accordance with the regulations and procedure set forth in § 153.16.
(1) Private parks, recreational, and community center buildings not owned or operated by a public entity;
(2) Churches and other places of worship, Sunday school buildings, and parish houses;
(3) Schools, educational institutions, and colleges, including dormitories, public libraries, public museums, and public art galleries;
(4) Restricted parking lots where the area is adjacent to a business district or is separated by a street or alley not over 30 feet in width, subject to conditions and limitations of the off-street parking standards set forth in § 153.19;
(5) Bed and breakfast operations; and
(6) Home occupations.
(D) Accessory uses. Accessory uses and structures customarily incidental to any single-family dwelling, approved conditional use, or legal non-conforming use and being located on the same lot therewith shall be permitted subject to the regulations set forth in § 153.17.
(E) Minimum yard sizes. The required minimum lot and yard sizes for the principal structure located within an R-1 District shall be as follows:
(1) Front yard setback. The minimum front yard setback distance shall be the average distance of the front yard setback for all lots in the same zoning district, along the same block face. For block faces that have more than ten lots in the same zoning district, the average distance of the front yard setback shall be based on the nearest ten dwellings located on the same block face.
(2) Side yard setback. The minimum side yard setback distance shall be five feet from each side lot line. A reduced setback on one side yard setback may be authorized by the Planning Commission with a conditional use approval if the Planning Commission finds that reduced setback on one side of the lot reflects the predominant character of the dwellings along the same block face.
(3) Read yard setback. The minimum rear yard setback distance shall be 30 feet.
(F) Maximum lot coverage. The maximum lot coverage for a principal building located in this district shall be 30% of the applicable lot.
(G) Maximum structure height. The maximum height of a principal structure located in this district shall be 35 feet and contain no more than two and one-half occupied stories.
(H) Minimum lot area. The minimum lot area for a single-family dwelling shall be 9,000 square feet. Larger lot areas may be required for approved conditional uses as established in § 153.16.
(I) Minimum dwelling area.
(1) Permitted single-family dwellings shall have a minimum livable floor area of 1,200 square feet, exclusive of garages, cornices, eaves, gutters, porches, balconies, terraces, or outside enclosures.
(2) Permitted single-story ("ranch style") single-family dwellings shall have a minimum livable floor area of 1,100 square feet, exclusive of garages, cornices, eaves, gutters, porches, terraces, or outside enclosures.
(J) Architectural and exterior material standards.
(1) Architectural standards. All new principal buildings shall comply with the following architectural standards:
(a) All new principal structures permitted in this district shall be constructed using a minimum 6/12 pitched roof design including the roof area located over the garage. The roof area located over any porch and entrance portions of the dwelling may be constructed using a minimum 4/12 pitch design.
(b) Minimum overhang length of 12 inches shall be provided over all faces of the exterior walls of a dwelling.
(2) Exterior building materials.
(a) All new principal buildings constructed in this zoning district shall be constructed of the following exterior materials: Brick, natural stone and cultured stone products, brick or stone veneer, wood, or cement siding products featuring a simulated wood appearance.
(b) Vinyl and aluminum siding is prohibited for use on principal buildings unless it is used on areas of a facade that are located above the first and are difficult to cover in the approved materials due to locational difficulties or serve strictly as trim, as determine d by the Zoning Enforcement Officer. In such cases, the use of vinyl or aluminum siding shall not cover more than 10% of the total facade. See Figure J.
Figure J: Two images of the acceptable use of vinyl as trim in circled areas
(c) Vinyl used on principal buildings, where allowed, shall be insulated vinyl or have a minimum thickness of 0.046 inches.
(d) Accessory structures may be constructed using any traditional building materials including vinyl and aluminum siding.
(3) Nonconforming structures. Principal buildings that do not conform to these architectural and building material standards on the date these standards became effective shall be considered nonconforming. Any such building damaged to the extent of 50% or greater of its fair market value shall be required to be reconstructed in compliance with these standards in accordance with § 153.21.
(Ord. 2025-10, passed 5-1-25)