Guide to Duplex and Multi-Family Residential Zoning in Grass Valley
In the City of Grass Valley, duplexes and multi-family rowhouses are primarily permitted in the R-2, R-2A, R-3, NC-Flex, and NG-3 zoning districts. While the Low Density Residential (R-2) and Neighborhood General 2 (NG-2) zones allow for duplexes, the development of rowhouses (townhomes) is restricted to higher-density districts such as the Multiple Dwelling Residential (R-3) and Neighborhood Center-Flex (NC-Flex) zones [Table 2.3, Table 2.7].
Authorized Districts for Duplexes and Townhomes
The City of Grass Valley Development Code categorizes duplexes and townhomes (classified as rowhouses) under "Multi-Family Housing." The following table outlines where these specific housing types are permitted ("P") or not allowed ("—").
| Zoning District | Duplex (2 Units) | Multi-Family Rowhouse / Townhome |
|---|---|---|
| R-2 (Low Density Residential) | P | — |
| R-2A (Medium Density Residential) | P | P |
| R-3 (Multiple Dwelling Residential) | P | P |
| NC-Flex (Neighborhood Center-Flex) | P | P |
| NG-3 (Neighborhood General 3) | P | P |
| NG-2 (Neighborhood General 2) | P | — |
Source: [Table 2.3, Table 2.4, Table 2.5, Table 2-7]
Residential Zone Development Standards
For the standard residential districts in the City of Grass Valley, projects must adhere to specific density, setback, and height limitations. The "Rowhouse" type is specifically defined as two or more attached two-story dwellings that front a sidewalk and occupy the entire width of their parcels without side setbacks [Section 17.100.020.S].
| Standard | R-2 District | R-2A District | R-3 District |
|---|---|---|---|
| Density | 8 units/acre | 1 unit per 3,500 sf | 1 unit per 2,000 sf |
| Max Height | 35 ft (2 stories) | 35 ft (3 stories*) | 35 ft (3 stories*) |
| Front Setback | 15 ft (facade) | 15 ft (facade) | 15 ft (facade) |
| Side Setback | 5 ft (interior) | 5 ft (interior) | 5 ft (interior) |
| Rear Setback | 20% of lot depth | N/A | 20% of lot depth |
| Min. Lot Area | 5,000 sf | 10,000 sf | 10,000 sf |
*Measured from finished grade to eaves or base of parapet [Table 2-8, Table 2-9].
Traditional Community Development Zone Standards
The City of Grass Valley utilizes "Traditional Community Development Zones" to encourage pedestrian-oriented infill. The NC-Flex and NG-3 zones are specifically designed to allow for medium to high-density housing near mixed-use centers [Section 17.21.030].
| Standard | NC-Flex District | NG-3 District |
|---|---|---|
| Front Build-to Line | 12 ft | 15 ft |
| Side Setback | 3 ft min / 10 ft max | 5 ft |
| Rear Setback | 5 ft min / 10 ft max | 5 ft |
| Max Building Height | 2.5 stories (30 ft) | 2.5 stories (30 ft) |
| Primary Street Built to BTL | 60% minimum | 60% minimum |
Note: In the NC-Flex zone, residential uses are permitted on ground floors [Section 17.21.030.C].
Parking Requirements for Multi-Family Units
The City of Grass Valley requires off-street parking for all multi-family residential developments of two units or more. These requirements vary based on the number of bedrooms per unit.
| Unit Type | Required Vehicle Spaces |
|---|---|
| Studio and 1-Bedroom | 1 covered space per unit, plus 1 guest space for every 5 units |
| 2-Bedroom and Larger | 2 covered spaces per unit, plus 1 guest space for every 5 units |
| Guest Parking | 1 space for every 5 units |
Source: [Table 3-3]
Sections Cited
- Table 1-1 (Zoning Map and Zones)
- Section 17.21.030 (Purposes of the Traditional Community Development Zones)
- Table 2.3 (Neighborhood Center-Flex Allowed Land Uses)
- Table 2.4 (Neighborhood General 3 Allowed Land Uses)
- Table 2.5 (Neighborhood General 2 Allowed Land Uses)
- Table 2-7 (Allowed Land Uses and Permit Requirements for Residential Zones)
- Table 2-8 (RE, R-1, and R-2 Zone Development Standards)
- Table 2-9 (R-2A and R-3 Zone Development Standards)
- Table 3-3 (Parking Requirements by Land Use)
- Section 17.100.020 (Definitions of Specialized Terms and Phrases)