Document: 3.2.4 Rural-3 (R-3)

Additional Zone-specific Standards - Accessory Residential Unit (ARU) - Primary Use Non-Residential

• An ARU accessory to a non-residential use shall not exceed 850 square feet of gross floor area including basement floor area.
• The floor area of an ARU accessory to a non-residential use shall be exempt from Floor Area Ratio (FAR) and maximum floor area calculations.

Additional Zone-specific Standards - Accessory Residential Unit (ARU) - Primary Use Residential

• Maximum Scale: An ARU accessory to a residential use shall not exceed 1,000 square feet of gross floor area including basement floor area.
• Density: A maximum of 1 ARU shall be permitted accessory to a detached single-family unit.

Operational Standards - Radioactivity (Sec. 6.4.8.)

This section pertains to the regulations and guidelines for radioactivity in the land use code.

Operational Standards - Heat and Humidity (Sec. 6.4.7.)

This section pertains to the regulations and guidelines for heat and humidity in the land use code.

Operational Standards - Fire and Explosive Hazards (Sec. 6.4.6.)

This section pertains to the regulations and guidelines for fire and explosive hazards in the land use code.

Operational Standards - Electrical Disturbances (Sec. 6.4.5.)

This section pertains to the regulations and guidelines for electrical disturbances in the land use code.

Operational Standards - Vibration (Sec. 6.4.4.)

This section pertains to the regulations and guidelines for vibration in the land use code.

Operational Standards - Noise (Sec. 6.4.3.)

The maximum sound level at the property line is 55 DBA according to this section.

Operational Standards - Refuse and Recycling (Sec. 6.4.2.)

This section requires trash and recycling enclosures.

Operational Standards - Outside Storage (Sec. 6.4.1.)

This section pertains to the regulations and guidelines for outside storage in the land use code.

Temporary Gravel Extraction Land Use Code (6.1.12.F.)

• Permit: Basic Use Permit
• GSA (min): Not applicable
• Density (max): Not applicable
• Scale (max): 15 acres
• Parking (min) (Div. 6.2.): 1 per employee
• Affordable Workforce Housing Units (min) (Div. 6.3.): Exempt

Temporary Shelter Land Use Code (6.1.12.D.)

• Permit: Basic Use Permit
• GSA (min): Not applicable
• Density (max): 1 per lot
• Scale (max): Not applicable
• Parking (min) (Div. 6.2.): 2
• Affordable Workforce Housing Units (min) (Div. 6.3.): Exempt

Family Home Daycare Land Use Code (6.1.11.F.)

• Permit: Basic Use Permit
• GSA (min): Not applicable
• Density (max): 1 dwelling unit
• Scale (max): Care for 3-6 persons
• Parking (min) (Div. 6.2.): 1 per employee + 1 off-street pick-up/drop-off
• Affordable Workforce Housing Units (min) (Div. 6.3.): Exempt

Section C.1: Allowed Uses - Home Business

• Permit: allowed use
• GSA (min): n/a
• Density (max): n/a
• Scale (max): 25% of habitable du sf
• Parking (min) (Div. 6.2.): 1/du
• Affordable Workforce Housing Units (min) (Div. 6.3.): exempt

Section C.1: Allowed Uses - Home Occupation

• Permit: Basic use permit
• GSA (min): n/a
• Density (max): 1/du
• Scale (max): 25% of habitable du sf
• Parking (min) (Div. 6.2.): n/a
• Affordable Workforce Housing Units (min) (Div. 6.3.): exempt

Section C.1: Allowed Uses - Accessory Residential Unit

• Permit: Basic use permit
• GSA (min): n/a
• Density: see 6.1.11.B. & E.1.
• Parking (min) (Div. 6.2.): 1.25/du
• Affordable Workforce Housing Units (min) (Div. 6.3.): exempt

Section C.1: Allowed Uses - Wireless Communications

• Parking (min) (Div. 6.2.): 1/employee + 1/ stored vehicle
• Affordable Workforce Housing Units (min) (Div. 6.3.): 0.000107*sf

Section C.1: Allowed Uses - Transportation/Infrastructure Utility Facility

• Permit: Conditional use permit
• GSA (min): n/a
• Density (max): n/a
• Scale (max): n/a
• Parking (min) (Div. 6.2.): 1/employee + 1/ stored vehicle
• Affordable Workforce Housing Units (min) (Div. 6.3.): 0.000107*sf

Section C.1: Allowed Uses - Industrial Gravel Extraction/ Processing

• Permit: special use permit
• Density (max): see 6.1.9.F
• Parking (min) (Div. 6.2.): 1/employee
• Affordable Workforce Housing Units (min) (Div. 6.3.): 0.000107*sf

Section C.1: Allowed Uses - Residential Detached Single-Family

• Permit use allowed, no use permit required
• GSA (min): n/a
• Density (max): 1/lot
• Scale (max): 8,000 sf of habitable floor space excluding basement
• Parking (min) (Div. 6.2.): 2/du
• Affordable Workforce Housing Units (min) (Div. 6.3.): 0.000017sf + (Exp(-15.49 + 1.59Ln(sf)))/2.176

Allowed Uses and Use Requirements

Open Space Agriculture (6.1.3.B.) Permit: Y (Use allowed, no use permit required) GSA (min): n/a Density (max): n/a Scale (max): n/a Parking (min) (Div. 6.2.): n/a Affordable Workforce Housing Units (min) (Div. 6.3.): exempt

Residential Detached Single-Family (6.1.3.B.) Permit: Y (Use allowed, no use permit required) GSA (min): n/a Density (max): 1/lot Scale (max): 8,000 sf habitable excluding basement Parking (min) (Div. 6.2.): 2/du, calculated using the formula: 0.000017 * sf + (Exp(-15.49 + 1.59 * Ln(sf))) / 2.176 Affordable Workforce Housing Units (min) (Div. 6.3.): 2/du

Institutional Assembly (out of NRO) (6.1.8.B.., E.1.) Permit: C (Conditional Use Permit) GSA (min): 35 ac Density (max): n/a Scale (max): see E.1., independent calculation Parking (min) (Div. 6.2.): independent calculation Affordable Workforce Housing Units (min) (Div. 6.3.): exempt

Institutional Daycare/Education (out of NRO) (6.1.8.C., E.1.) Permit: C (Conditional Use Permit) GSA (min): 35 ac Density (max): n/a Scale (max): see E.1., independent calculation Parking (min) (Div. 6.2.): independent calculation Affordable Workforce Housing Units (min) (Div. 6.3.): exempt (see 6.3.2.C.11 and 6.3.2.C.12)

Industrial Gravel Extraction/Processing (6.1.9.F.) Permit: S (Special Use Permit) GSA (min): see 6.1.9.F. Density (max): 1/employee Scale (max): 0.000107 * sf Parking (min) (Div. 6.2.): 0.000107 * sf Affordable Workforce Housing Units (min) (Div. 6.3.): 0.000107 * sf

Transportation/Infrastructure Utility Facility (6.1.10.C., E.1.) Permit: C (Conditional Use Permit) GSA (min): n/a Density (max): n/a Scale (max): see E.1. Parking (min) (Div. 6.2.): 1/employee + 1/stored vehicle Affordable Workforce Housing Units (min) (Div. 6.3.): 0.000107 * sf

Transportation/Infrastructure Wireless Communications (6.1.10.D.) Permit: See 6.1.10.D. GSA (min): 1/employee + 1/stored vehicle Density (max): 0.000107 * sf Scale (max): 0.000107 * sf Parking (min) (Div. 6.2.): 0.000107 * sf Affordable Workforce Housing Units (min) (Div. 6.3.): 0.000107 * sf

Accessory Uses Accessory Residential Unit (6.1.11.B., E.1.) Permit: B (Basic Use Permit) GSA (min): n/a Density (max): see 6.1.11.B., E.3. Scale (max): 1.25/du Parking (min) (Div. 6.2.): exempt Affordable Workforce Housing Units (min) (Div. 6.3.): exempt

Accessory Uses Home Occupation (6.1.11.D.) Permit: B (Basic Use Permit) GSA (min): n/a Density (max): 1/du Scale (max): 25% of habitable du sf Parking (min) (Div. 6.2.): n/a Affordable Workforce Housing Units (min) (Div. 6.3.): exempt

Accessory Uses Home Business (6.1.11.E.) Permit: C (Conditional Use Permit) GSA (min): n/a Density (max): 1/du Scale (max): 25% of habitable du sf Parking (min) (Div. 6.2.): 1/du Affordable Workforce Housing Units (min) (Div. 6.3.): exempt

Accessory Uses Family Home Daycare (6.1.11.F.) Permit: B (Basic Use Permit) GSA (min): n/a Density (max): 1/du Scale (max): care for 3-6 persons Parking (min) (Div. 6.2.): 2 Affordable Workforce Housing Units (min) (Div. 6.3.): exempt

Temporary Uses Temporary Shelter (6.1.12.D.) Permit: B (Basic Use Permit) GSA (min): n/a Density (max): 1/lot Scale (max): n/a Parking (min) (Div. 6.2.): 2 Affordable Workforce Housing Units (min) (Div. 6.3.): 2

Temporary Uses Temp. Gravel Extraction (6.1.12.F.) Permit: B (Basic Use Permit) GSA (min): n/a Density (max): n/a Scale (max): 15 ac Parking (min) (Div. 6.2.): 1/employee Affordable Workforce Housing Units (min) (Div. 6.3.): exempt

Section C: Use Standards

Standards applicable to use are provided in this subsection. All standards in Article 6 are applicable unless stated otherwise.

Section 9: Infrastructure - Required Utilities

• Water (required): Connection to public supply, installation of central supply, or evidence of individual well
• Sewer (required):
• 0-500 feet from public sanitary sewer: Connect to public sanitary sewer

Section 9: Infrastructure - Transportation Facilities

• Access Required:
• Right-of-way for a minor local road (minimum): 60 feet
• Travel lane width for minor local road: 10 feet
• Road and driveway design: Subject to Fire Protection Resolution

Section 1: Required Physical Development Permits

The following permits may be required. Please see the referred section for clarification.

• Site Disturbance Grading Permit (refer to section 5.7.1)
• Structure Grading Permit (refer to section 5.7.1 and building permit section 8.3.3)
• Fence Grading Permit (refer to section 5.7.1 and other section 5.1.2)
• Sign Grading Permit (refer to section 5.7.1 and Sign Permit section 8.3.5)

Section 7: Grading, Erosion, and Stormwater Regulations

• Grading (Sec. 5.7.2.)
• Erosion Control (Sec. 5.7.3.): Erosion shall be controlled at all times.
• Stormwater Management (Sec. 5.7.4.): No increase in peak flow rate or velocity across property lines.

Section 6: Sign Regulations (Sec. 5.6.2.)

• Allowed Signs (max):
• 1 rustic freestanding or wall sign. Maximum area: 4 square feet. Maximum height: 4 feet.
• 1 wall sign per home occupation. Maximum area: 2 square feet. Maximum height: not applicable.

Section 5: Natural Hazards to Avoid

• Steep Slopes (Sec. 5.4.1.): Development prohibited on slopes greater than 30%
• Unstable Soils (Sec. 5.4.2.)
• Fault Areas (Sec. 5.4.3.)
• Floodplains (Sec. 5.4.4.)
• Wildland Urban Interface (Sec. 5.4.5.)

Section 4: Exterior Lighting Regulations (Sec. 5.3.1.)

• Light trespass is prohibited.
• All lights over 600 initial lumens shall be fully shielded.
• Maximum lumens per square foot of site development: 0.5
• Light Color: ≤3000 Kelvin

Section 3: Environmental Regulations

• Wildlife feeding (Sec. 5.1.3.)
• Bear resistant trash container (Sec. 5.1.3.)

Exterior Materials

• External surfaces must be non-reflective
• Colors should be earth tones

Fencing

• Wildlife Friendly Fencing is required (Refer to Section 5.1.2)

Scenic Standards

• Refer to Scenic viewsheds in Section 5.3.2

Structure Height (Refer to Section 9.4.9)

• Height at any point (maximum): 30 feet
• Overall height (maximum): 37.5 feet. (This is used when buildings are on a slope. See the definition of Overall height).

Scale of Development - Floor Area Limits

• Maximum floor area is GSA(0.032) + 3,900 square feet
• Not to exceed 10,000 square feet
• Single building (maximum): 10,000 square feet

GSA = Gross Site Area (sf)

Section 2: Structure Standards

Structure Location

• Street Setback (minimum): 25 feet
• Rear/Side Setback (minimum): 10 feet
• Eaves, canopies, decks, and other architectural projections that clear 9 feet above finish grade may extend 4 feet into a setback

Section 4: Site Development Standards - Landscaping Requirements

• For every 10,000 square feet of floor area, 1 planting unit (pu) is required.

Section 3: Site Development Standards - Setback Requirements

• River Setback (minimum): 150 feet
• Stream/Lake/Pond Setback (minimum): 50 - 150 feet
• Wetland Setback (minimum): 30 feet
• Irrigation Ditch Setback (refer to 7.7.4.D.): minimum 15 feet
• Street Setback (minimum, except driveway across street yard): 25 feet
• Rear/Side Setback (minimum): 5 feet

Section 2: Site Development Standards - Site Development Location

• Wildlife Habitat: Refer to NRO (Sec. 5.2.1.)
• Scenic Viewsheds: Refer to SRO (Sec. 5.3.2.)
• Waterbodies/Wetlands: Refer to Sec. 5.1.1.

Section 1: Site Development Standards - Maximum Site Development Amount

• For a Gross Site Area (GSA) less than 3 acres, the maximum site development is calculated as GSA(0.11) + 5,619 square feet.
• For a GSA equal to or greater than 3 acres, the maximum site development is calculated as GSA(0.04) + 15,007 square feet.

3.2.4. Rural-3 (R-3) Physical Development Standards

Standards applicable to physical development in the R-3 zone are provided in this subsection. For additional standards, refer to the referenced division or section where a cross-reference is listed. All standards in Article 5 are applicable unless stated otherwise.

3.2.4. Rural-3 (R-3) Intent

• Desired Future Character: Development, use, and conservation in the R-3 zone should be located and designed to respect property rights, allow for wildlife permeability, and preserve scenic viewsheds. The maximum density of the R-3 is defined by existing property rights, with residential use being preferred.
• Existing Character: The R-3 zone generally includes rural subdivisions and neighborhoods with lots of 6 acres or less that are used for a single-family dwelling.
• Comprehensive Plan: The R-3 zone is primarily based on the vision for conservation subareas identified in the Comprehensive Plan's Illustration of Our Vision chapter.