Grass Valley R-1 Single-Family Residential Zone Standards
The R-1 Single-Family Residential zone in Grass Valley is established for neighborhoods consisting of single dwellings on standard urban lots. This district allows for primary residential use, accessory dwelling units, and limited agricultural activities such as keeping backyard chickens, while excluding multi-family developments like duplexes or rowhouses. Most non-residential uses, including private schools and utility facilities, require the approval of a Use Permit from the Grass Valley Planning Commission [Section 17.22.020].
Allowed Land Uses
Land uses in the Grass Valley R-1 Single-Family Residential zone are categorized as Permitted (P), which are allowed subject to standard code compliance; allowed subject to a Minor Use Permit (MUP); or allowed subject to a Use Permit (UP) [Section 17.22.030].
Residential Uses
- Single-Family Dwellings: Permitted by right [Section 17.44.210].
- Accessory Dwelling Units (ADU) or Carriage Houses: Permitted to provide independent living facilities on the same site as a primary dwelling [Section 17.44.190].
- Residential Accessory Uses or Structures: Permitted, including detached garages, gazebos, and workshops [Section 17.44.020].
- Residential Care (6 or fewer clients): Permitted.
- Residential Care (7 or more clients): Allowed subject to a Use Permit.
- Transitional and Supportive Housing: Permitted.
- Home Occupations: Permitted, allowing for low-impact business activities within the home [Section 17.44.100].
- Rooming or Boarding Houses: Allowed subject to a Use Permit.
- Mobile Home Parks: Allowed subject to a Use Permit [Section 17.44.150].
Agricultural and Resource Uses
- Backyard Chickens: Permitted for domestic use only, with a maximum of four chickens and no roosters [Section 17.44.030].
- Agricultural Accessory Structures: Permitted.
- Crop Production (Horticulture, Orchard, Vineyard): Permitted.
- Animal Keeping: Allowed subject to a Use Permit.
Recreation, Education, and Public Assembly
- Parks and Playgrounds: Permitted, though a Use Permit may be required if specified by the General Plan.
- Public Schools: Permitted, though a Use Permit may be required if specified by the General Plan.
- Private Schools: Allowed subject to a Use Permit.
- Library, Museum, or Art Gallery: Permitted, though a Use Permit may be required if specified by the General Plan.
- Meeting Facilities (Public or Private): Allowed subject to a Use Permit.
- Golf Courses and Country Clubs: Allowed subject to a Use Permit.
General Services and Infrastructure
- Day Care (Large Family Home): Permitted [Section 17.44.060].
- Day Care (Small Family Home): Permitted.
- Day Care Center (Child or Adult): Allowed subject to a Use Permit.
- Cottage Food Operators: Permitted.
- Public Safety Facilities: Permitted, though a Use Permit may be required if specified by the General Plan.
- Utility Facilities: Allowed subject to a Use Permit.
- Hosted Short-Term Rentals: Permitted (subject to limitations for legally non-conforming dwellings) [Section 17.44.205].
- Vacation Rental Units: Allowed subject to a Minor Use Permit.
Prohibited Uses
In the R-1 Single-Family Residential zone, any use not explicitly listed in the allowable use tables is prohibited [Section 17.20.030]. Specific prohibited uses identified in the Grass Valley Development Code include:
- Multi-Family Dwellings: Duplexes, triplexes, fourplexes, and rowhouses are explicitly prohibited [Table 2-7].
- Medical Marijuana: All marijuana cultivation and dispensaries are strictly prohibited and declared a public nuisance in every zone within the City of Grass Valley [Section 17.20.035].
- Commercial/Industrial Activities: Most retail trade, manufacturing, and heavy industrial services are not permitted in residential districts.
- Equestrian Facilities: Explicitly listed as not allowed in the R-1 zone [Table 2-7].
Technical Development Standards
Property owners in the Grass Valley R-1 Single-Family Residential district must adhere to specific site planning and building standards regarding lot size, height, and setbacks.
| Development Feature | Requirement for R-1 Zone |
|---|---|
| Minimum Lot Area | 6,000 square feet |
| Minimum Lot Width | 60 ft (interior); 70 ft (corner) |
| Maximum Density | 1 primary unit per lot (plus ADU) |
| Maximum Height | 35 feet and 2 stories |
| Maximum Site Coverage | 50% |
| Front Setback | 15 ft for facade; 5 ft for front porch |
| Side Setback (Interior) | 5 feet |
| Side Setback (Street side) | 20% of lot width (up to 15 ft maximum) |
| Rear Setback | 20% of lot depth (minimum 10 ft; maximum 20 ft) |
[Source: Table 2-8]
Parking Requirements
Off-street parking must be provided for all developments within the R-1 Single-Family Residential zone to minimize on-street congestion.
| Land Use Type | Vehicle Spaces Required |
|---|---|
| Single-Family Dwelling | 2 spaces, at least 1 of which must be covered |
| Accessory Dwelling Unit (ADU) | 1 space (unless exempt based on proximity to transit or historic district) |
| Residential Care Facility | 1 space per 2 units, plus 1 per 4 units for guests/staff |
| Large Family Day Care | 3 spaces minimum |
| Schools (Nursery/Kindergarten) | 1 space per employee plus 1 space per 10 children |
[Source: Table 3-3]
Sections Cited
- Section 17.20.030 - Allowable land uses and planning permit requirements
- Section 17.20.035 - Prohibition of medical marijuana cultivation and dispensaries
- Section 17.22.020 - Purposes of the residential zones
- Section 17.22.030 - Residential zone allowable land uses and permit requirements
- Section 17.22.040 - Residential zone site planning and building standards
- Section 17.36.040 - Number of parking spaces required
- Section 17.44.020 - Accessory structures and uses
- Section 17.44.030 - Backyard chickens
- Section 17.44.060 - Child day care facilities
- Section 17.44.100 - Home occupations
- Section 17.44.150 - Mobile/manufactured homes and mobile home parks
- Section 17.44.190 - Accessory dwelling units (ADU)
- Section 17.44.205 - Short-term rentals
- Section 17.44.210 - Single dwellings