26-07
DIAMOND MOUNTAIN VINEYARD COMPANY INC/ DIAMOND CREEK VINEYARDS / MAJOR MODIFICATION NO. P19-00177 - MOD & REQUEST FOR EXCEPTION TO THE NAPA COUNTY ROAD AND STREET STANDARDS CEQA STATUS: Consideration and possible adoption of a Mitigated Negative Declaration and a Mitigation Monitoring and Reporting Program (MMRP) (SCH#2025120440). According to the proposed Mitigated Negative Declaration, the proposed project would not have any potentially significant environmental impacts after implementation of mitigation measures. Mitigation measures are proposed for the following area: Biological Resources. The project site is not included on a list of hazardous materials sites compiled pursuant to Government Code Section 65962.5. REQUEST: This application was submitted to participate in the County's Code Compliance Program as described in Resolution No. 2018-164 adopted by the Napa County Board of Supervisors on December 4, 2018. The proposal is to modify an existing winery Use Permit and subsequent modifications to recognize and approve items that are out of compliance with the permitted entitlements and for expansion beyond existing entitlements such as construction of a new winery building and agricultural storage building, increase in production, number of employees, weekly visitation, on-premises consumption of wine produced on-site, additional parking, number of marketing events, and necessary infrastructure improvements and upgrades to the wastewater system, and conversion of the existing winery building to a single-family residence with parking. The request also includes an Exception to the Napa County Road and Street Standards. The project is located on a 78.12-acre holding within the Agricultural Watershed (AW) zoning district and General Plan designated as Agriculture, Watershed, and Open Space (AWOS). The site is located at 1500 Diamond Mountain Road, Calistoga, CA 94515. APN 020-440-004 (Winery Parcel) and 020-400-012 (Residential Parcel). STAFF RECOMMENDATION: Continue the item to January 21, 2026, to accommodate completion of the project’s CEQA review by the Governor’s Office of Land Use and Climate Innovation and the public. STAFF CONTACT: Kelli Cahill, Planner III, (707) 265-2325 or kelli.cahill@countyofnapa.org APPLICANT AGENT CONTACT: Lester Hardy, Attorney; (707) 480-8093; lester@lfhardy.com
- Committee
- Planning Commission
- Requested by
- Planning, Building and Environmental Services
- Introduced
- December 11, 2025
- On agenda
- January 7, 2026