Building Height Standards and Measurement in Grass Valley
In the City of Grass Valley, building height is primarily calculated as the vertical distance from the finished grade to the eave or the bottom of the parapet of the structure. The City of Grass Valley Development Code prohibits the artificial raising of finished grade to gain additional building height and mandates specific measurement protocols for hillside developments to preserve scenic vistas and community character.
General Measurement Methodology
Under the City of Grass Valley Development Code, the height of a structure is measured as the vertical distance from the lowest point of the base of the sign or building at normal grade to the top of the highest attached component [Section 17.30.050.C].
"Grade" is defined by the City of Grass Valley as the ground surface immediately adjacent to the exterior base of a structure, typically used as the basis for measuring height [Section 17.100.020]. For measurement purposes, normal grade is construed to be either the existing grade before construction or a newly established grade after construction, excluding any mounding, filling, or berming performed solely to locate a sign or structure [Section 17.38.060.B].
Hillside and Ridgeline Measurement
Specific rules apply to the Hillside and Ridgeline Development areas within the City of Grass Valley to ensure structures do not silhouette against the sky or dominate natural topography.
- Standard Slopes: For proposed structures on sloping lots, the total height shall not exceed 24 feet as measured in compliance with standard code, and shall not exceed a total height of 35 feet when measured from the lowest elevation on the site where the structure touches the grade to the highest point of the roof [Section 17.54.040.E].
- Ridgelines: A new structure is prohibited within 50 vertical feet of a ridgeline unless an exception is granted. If an exception is granted for a legal lot existing prior to the effective date of the code, the structure shall not exceed a height of 16 feet above the highest point on the ridgeline or hilltop [Section 17.54.040.B, Section 17.54.040.E.3].
- Downhill Walls: No single building wall on the downhill side of a house in the City of Grass Valley may exceed 15 feet in height above grade. Additional height may be allowed in 15-foot increments if each increment is stepped back from the lower wall by at least 10 feet [Section 17.54.040.E.5].
Height Limits by Zoning District
The City of Grass Valley establishes various height maximums based on the specific zoning designation of the parcel.
Traditional Community Development Zones
| Zone Symbol | Name of Zone | Minimum Height | Maximum Height |
|---|---|---|---|
| TC | Town Core | 22 feet | 3 stories / 45 feet (5 stories with UP) |
| NC | Neighborhood Center | 16 feet | 3 stories / 45 feet (4 stories for affordable/senior) |
| NC-Flex | Neighborhood Center Flex | 16 feet | 2.5 stories / 30 feet |
| NG-3 | Neighborhood General 3 | N/A | 2.5 stories / 30 feet |
| NG-2 | Neighborhood General 2 | N/A | 2 stories / 30 feet |
Residential, Commercial, and Industrial Zones
| Zone Symbol | Name of Zone | Maximum Height |
|---|---|---|
| RE | Residential Estate | 35 feet |
| R-1 | Single-Family Residential | 35 feet |
| R-2 | Two-Family Residential | 35 feet / 2 stories |
| R-2A | Medium Density Residential | 35 feet / 3 stories |
| R-3 | Multiple Dwelling Residential | 35 feet / 3 stories |
| C-1 | Community Business District | 3 feet / 2 stories* |
| C-2 | Central Business District | 50 feet / 4 stories |
| C-3 | Heavy Commercial | 50 feet / 4 stories |
| OP | Office Professional | 50 feet / 4 stories |
| CBP | Commercial Business Park | 50 feet / 4 stories |
| M-1 | Light Industrial | 50 feet / 4 stories |
| M-2 | General Industrial | 50 feet / 4 stories |
*Note: The City of Grass Valley code text for C-1 specifies 3 feet and 2 stories, which may be a typographical entry in the source document [Table 2-11].
Exceptions to Height Limits
Certain structural features in the City of Grass Valley are permitted to exceed the standard height limits of the applicable zone [Section 17.30.050.D]:
- Architectural Features: Chimneys, cupolas, monuments, mechanical equipment, or vents may exceed the limit by up to 3 feet.
- Significant Features: Spires, theater scenery lofts, or towers may exceed the zone limit by up to 25 feet.
- Telecommunications: Antennas and poles must comply with specific standards in Chapter 17.46, though antennas mounted on a structure generally cannot exceed 20 feet above the highest point of the structure [Section 17.46.060.B.3].
- Safety Visibility Areas: At street corners, no structure, sign, or landscape element may exceed 36 inches in height within the traffic safety visibility area [Section 17.30.050.E.2].
Sections Cited
- Section 17.30.050 - Height limits and exceptions.
- Section 17.38.060 - General requirements for all signs.
- Section 17.54.040 - Site planning and development standards (Hillside).
- Section 17.100.020 - Definitions of specialized terms and phrases.
- Table 1-1 - 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 2-11 - C-1, C-2, and C-3 Zone Development Standards.
- Table 2-12 - OP and CBP Zone Development Standards.
- Table 2-13 - M-1 and M-2 Zone Development Standards.