Compare cultivation farms, mixed-light greenhouses, industrial buildings and dispensary real estate in Sonoma County. Send Diamond Real Estate Group the parcel number, intended use and purchase criteria for a property search or a review of a site you already found.
Request a Sonoma County property search · Search cannabis real estate across California
Sonoma County’s 2026 cannabis rules
Sonoma County’s updated Cannabis Program applies to unincorporated parcels. The Board’s December 2025 action revised land-use standards and established a cannabis business licensing program. The county implemented the licensing program effective July 1, 2026. The program materials describe by-right treatment for many supply-chain uses in eligible commercial and industrial zones. Ask Permit Sonoma which approvals, performance standards and business license requirements apply to your proposed use on the specific parcel. Incorporated cities such as Santa Rosa operate under their own rules.
Sonoma County Cannabis Program Update · County cannabis business license program · Santa Rosa cannabis code
Match the property to the proposed use
| Search | Request before touring |
|—|—|
| Outdoor cultivation or a farm with other agricultural uses | Approved cultivation area and premises diagram, water-source records, grading approvals, road and fire access, and the conditions governing any drying, processing or accessory use. |
| Greenhouse or mixed-light cultivation | Greenhouse permit and final inspection, approved canopy, electrical capacity, ventilation and odor conditions, and confirmation that existing structures match approved plans. |
| Industrial cannabis facility | Building and fire records, exact permitted activity, utility-confirmed power, loading access and local approval history for any proposed change of use. |
| Storefront or tenant-occupied property | Confirm deed versus lease, permitted use, authorization conditions, current occupancy and assignment or change-of-control restrictions. |
How to screen an unincorporated Sonoma County parcel
1. Identify the APN, legal address and actual jurisdiction. Open the county parcel record and note the zoning district and applicable overlays.
2. Pull the full use and building permit files. Compare the stamped site plan with the footprint, greenhouses, drying structures, access roads and other improvements you intend to use.
3. Ask what changes on sale. Confirm any transition requirements for legacy approvals, any separate business license, and whether the operator or use must be reapproved.
4. Review water, title and infrastructure. If the farm shares a well or road, request the recorded agreements and confirm that the buyer has the rights and physical capacity the project requires.
5. Check state license status and local obligations. Obtain the current county tax and fee records for the activity and parcel, and check for outstanding balances or compliance deadlines.
Permit Sonoma online records · State cannabis license search · Sonoma County cannabis business tax ordinance
How to compare two wine-country properties
On a mixed-use ranch, identify which areas generate value independently of cannabis and which improvements depend on the existing operation. A permitted barn with conventional agricultural use may have a wider market than an unpermitted structure built for one operator. When two properties have similar asking prices, compare usable land, documented water, insurance availability, approved improvements and the cost of meeting outstanding conditions. If you own a site, those same records help a buyer understand the price.
Common questions
Can I add cannabis cultivation to a Sonoma County vineyard or ranch?
Ask Permit Sonoma about the specific parcel, zoning, compatible uses, permit pathway, approved water sources and setbacks. Existing agricultural operations provide useful infrastructure to evaluate. The county determines whether the new use is eligible.
Does the county ordinance apply inside Santa Rosa?
Santa Rosa has its own cannabis code. Confirm jurisdiction with the parcel number, especially if a listing uses a Santa Rosa mailing address for an unincorporated property.
What should I send with an off-market inquiry?
Send your target area, acreage or building size, activity, purchase budget, timing and the approvals you need on day one. Sellers can share the APN, permit status, improvements and occupancy.
Sonoma County real estate · California cannabis property due diligence · Contact Diamond Real Estate Group
