Regulations for Legal Nonconforming (Grandfathered) Uses in Grass Valley
In the City of Grass Valley, a legal nonconforming use is a land use that was lawfully established before the current development code was adopted or amended but no longer complies with the present zoning regulations. These "grandfathered" uses are permitted to continue indefinitely and can be transferred to new owners, provided they are not enlarged or increased. However, the right to continue a nonconforming use in Grass Valley generally terminates if the use is discontinued for a continuous period of 12 months or if the structure housing the use is more than 50% destroyed and not reconstructed under specific permit conditions [Section 17.90.010, 17.90.050].
Defining Nonconforming Status
The City of Grass Valley distinguishes between nonconforming uses, structures, and parcels. A Nonconforming Use is specifically defined as a use of land or a structure that was legally established and maintained before the adoption or amendment of the development code, but which does not conform to current requirements for allowable land uses within the applicable zoning district [Section 17.90.020.D].
Operational Rules and Ownership
The Grass Valley Community Development Department allows for the continued operation of legal nonconforming uses under the following general rules:
- Continuance: A nonconforming use may be continued, including through a transfer of ownership [Section 17.90.030.A.1].
- No Expansion: The use shall not be enlarged or increased, nor be extended to occupy a greater area of land than it lawfully occupied before becoming nonconforming [Section 17.90.030.A.1].
- Incidental Expansion: A nonconforming use within a portion of a structure may be extended throughout the interior of that structure with Minor Use Permit approval [Section 17.90.030.A.2.a].
- Substitution of Use: A nonconforming use may be changed to another nonconforming use of the same type, or to a use that requires less parking, subject to a Minor Use Permit. Once a nonconforming use is changed to a conforming use, the nonconforming status is lost and cannot be re-established [Section 17.90.030.A.2.b].
Termination of Grandfathered Status
Grandfathered rights for a use in the City of Grass Valley are not absolute and can be lost through abandonment or physical destruction.
Termination by Discontinuance
If a nonconforming use of land or a nonconforming use within a conforming structure is discontinued for a continuous period of 12 months or more, all rights to legal nonconforming status terminate [Section 17.90.050.A.1]. The Grass Valley Community Development Director determines discontinuance based on evidence such as the removal of equipment, furniture, or the disconnection of utilities [Section 17.90.050.A.2]. An extension of up to 12 additional months may be granted via Minor Use Permit if the delay in re-establishing the use is due to circumstances of a significant or unusual nature [Section 17.90.050.A.3].
Termination by Destruction
When a nonconforming structure or a structure housing a nonconforming use is involuntarily damaged or destroyed, the following standards apply:
| Cost of Repair/Replacement | Requirement for Continuance |
|---|---|
| 50% or less of the assessed value | May be restored to the same size/use if started within 12 months and diligently completed [Section 17.90.050.B.1]. |
| More than 50% of the assessed value | Requires Minor Use Permit approval. The city must find that the benefit to public health/safety exceeds the detriment of continuing the nonconformity [Section 17.90.050.B.2]. |
Residential Exceptions
The City of Grass Valley provides broader protections for nonconforming residential uses:
- Reconstruction: Any involuntarily damaged single- or multi-unit nonconforming dwelling may be reconstructed with the same footprint, height, and number of units, provided it complies with current building and fire codes [Section 17.90.040.A].
- Substantial Expansion: Substantial expansion or renovation (defined as adding 25% or more floor area or construction valued at 50% or more of the structure's value) may be allowed with both a Minor Use Permit and a Development Review Permit. These must maintain neighborhood character [Section 17.90.040.B].
Nonconforming Status Due to Lack of Permit
If a use was lawfully established but the Grass Valley Development Code was later changed to require a Use Permit or Minor Use Permit for that activity, the use is deemed conforming. It may continue to the extent of its previous lawful operation, including its site area boundaries and hours of operation [Section 17.90.070.A].
Special District Rules: Southeast Industrial District (SEID)
Grass Valley applies unique "grandfathering" protections for existing uses within the Southeast Industrial District (SEID) Combining Zone. For any legal nonconforming uses in place at the time this zone was adopted, the City of Grass Valley shall not impose restrictions or limitations on:
- Hours of operation;
- Number of employees;
- Number of vehicle or truck trips;
- Number of customers; or
- Noise, dust, lights, odors, or vibrations [Section 17.28.080.H].
Sections Cited
- Section 17.28.080 - Southeast industrial district (SEID) combining zone
- Section 17.90.010 - Purpose
- Section 17.90.020 - Definitions
- Section 17.90.030 - Restrictions on nonconforming uses and structures
- Section 17.90.040 - Residential exceptions
- Section 17.90.050 - Loss of nonconforming status
- Section 17.90.070 - Nonconforming due to lack of use permit