Twin Oaks Valley Winery


SCH Number
Lead Agency
City of San Marcos
Document Title
Twin Oaks Valley Winery
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Agricultural Residential (AG) / Agriculture-1 (A-1)
Document Description
The Twin Oaks Valley Winery project (project) is located at 1451 Mulberry Drive in the City of San Marcos (City). The project proposes development of a winery, including tasting room and production building, a processing area, an outdoor tasting patio, and associated parking. The project would be located on the northeastern corner of Assessor’s Parcel Number (APN) 182-132-09, which encompasses 4.25-acres (project site). The project site is currently designated as Agricultural/Residential (AG) and has an existing residence and vineyard on-site. The winery would occupy the northeast corner of the project site and disturb approximately 17,000 square feet of land to control slopes. The building footprint is approximately 2,000 square-feet (sf). The proposed winery building would be two stories tall (approximately 33 feet in height), and the total building square footage would be 3,582-sf. The total enclosed building area would make up 3,107-sf, and the second story terrace would be approximately 475-sf. A public tasting area would encompass approximately 600 sf of the enclosed building area. The remaining 2,507-sf of enclosed building area would be wine production areas. The winery would include a 240-sf outdoor tasting area, overflow outdoor storage and production area, an indoor tasting room, a barrel room, a mechanical room, two bathrooms, and a case storage room on the first floor. The winery building’s upper level would hold the building’s fermentation room, office space, a bathroom, an office, and a terrace. A small surface lot would provide approximately 15 parking spots to the project. Implementation of a permanent bioretention area in the northwest corner of the project parcel would be created as part of the project. A portion of the property immediately adjacent to Mulberry Dr. will be provided to the City for the purpose of accommodating a multi-use path, as required by the City, as well as widening Mulberry Dr. along the project frontage. The project would have a maximum of 2-3 employees, and the tasting room would likely have approximately 20 guests at any one time and about 50-60 guests total per day. Hours of operation for wine tasting would be 3 p.m. to 7 p.m. Thursday through Sunday, and 3 p.m. to 8 p.m. Friday and Saturday. Special events may occasionally run until 9 p.m.

Contact Information

Norm Pedersen
Agency Name
City of San Marcos
Job Title
Associate Planner
Contact Types
Lead/Public Agency


San Marcos
San Diego
Cross Streets
1451 Mulberry Drive
Total Acres
Parcel #
State Highways
Twin Oaks Elementary, Richland Elementary School

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 11 (DOT), California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, San Diego Region 9 (RWQCB), Department of Toxic Substances Control, Office of Historic Preservation, State Water Resources Control Board, Division of Water Rights
Development Types
Other (Winery bldg w/ tasting room, 3,500 sq ft., 3 employees)
Local Actions
Use Permit
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Drainage/Absorption, Flood Plain/Flooding, Geology/Soils, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Septic System, Sewer Capacity, Solid Waste, Transportation, Vegetation, Wetland/Riparian, Wildfire
Local Review Period Start
Local Review Period End


Notice of Completion [NOC] Transmittal form

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