R-10 -- Low-Density Residential, Alpine/Slope District
The R-10 district is intended for those areas where natural physical features and environmental factors such as slopes, alpine and forest vegetation, soils, slope stability, and geologic hazards require unique and creative design for development. Creative site design and site engineering are essential. See AMC 21.04.020O. for more information.
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Average
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Lot Requirements
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Setback Requirements
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Building Height
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Driveway
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Lot
Slope1
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Area
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Width
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Building
Coverage
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Impervious
Surface2
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Front
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Side
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Rear
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Principal
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Detached Garage
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Accessory
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Surface
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More than 30.00%
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7.50 acres
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300 feet
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3%
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8%
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10 feet
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50 feet
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10 feet
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30 feet
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25 feet
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18 feet
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Gravel
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25.01% - 30.00%
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5.00 acres
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300 feet
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5%
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10%
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10 feet
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25 feet
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10 feet
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30 feet
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25 feet
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18 feet
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Gravel
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20.01% - 25.00%
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2.50 acres
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180 feet
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8%
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14%
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10 feet
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25 feet
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10 feet
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30 feet
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25 feet
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18 feet
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Gravel
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20.00% or less
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1.25 acres
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100 feet
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10%
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20%
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10 feet
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25 feet
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10 feet
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30 feet
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25 feet
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18 feet
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Gravel
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1 The formula to determine average lot slope S is: S=(I)(L)(0.0023)/A where I is the contour interval (maximum of 20 feet), L is the sum of the length of all contours on the lot or tract, and A is the area of the lot or tract in acres. One acre equals 43,560 square feet.
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2 All parking areas, driveways, roads, sidewalks and walkways, whether paved or not, and any areas covered by buildings or structures, concrete, asphalt, brick, stone, wood, ceramic tile or metal, are considered to be impervious surfaces.
Only a single principle structure is allowed on any lot or tract.
If you use the online version of the code (under "External Links"), search on '21.06.020" for more information. Please note that recent amendments may not have been published yet. Planning Staff will be happy to verify the current code language for you.
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