San Mateo County, CA Cannabis Regulations: Dispensary Zoning (2026)
Key Facts
- Licenses issued
- Mixed-Light Cultivation & Nursery only
- Eligible land
- Agriculture-zoned or 3-yr farmed parcels
- Retail sales
- Prohibited countywide in unincorporated area
- Delivery
- Allowed via outside licensee, no local site
- Structure setback
- 300 ft from homes/businesses (Sec. 5.148.160(d))
- Sensitive-use setback
- 600 ft from schools, day care (Sec. 5.148.160(e))
- First chapter violation fine
- $1,000 (Sec. 5.148.180)
Summary
Unincorporated San Mateo County bars almost every kind of cannabis business outright. County Code Section 5.148.050 lets the Planning and Building Department license only Mixed-Light Cultivation and Mixed-Light Nursery operations, and only on land zoned Agriculture or farmed commercially for the prior three years. Retail sales, dispensaries, indoor grows, manufacturing, testing, and microbusinesses have no lawful location anywhere in the unincorporated area.
(a)Only Licenses for Mixed-Light Cultivation of Cannabis and Mixed-Light Nursery Cultivation of Cannabis will be issued by the County. The County shall only issue such Licenses for (1) lands designated as "Agriculture" by the County General Plan Land Use Map, and (2) other lands where commercial agricultural use has been conducted for the three (3) years preceding the effective date of this Ordinance, as verified by the Agriculture Commissioner. No other Commercial Cannabis Activities for either medical or non-medical purposes, including, without limitation, Outdoor Cultivation, Indoor Cultivation, Manufacturing, Testing, Microbusinesses, stand-alone Processing on a separate Premises, or Retail Sales, are allowed in the unincorporated area of the County. In addition, no personal non-medical Outdoor Cultivation is allowed in the unincorporated area of the County.(b)Notwithstanding the foregoing...2.Lawful delivery of Cannabis to a Customer, however, no physical location for such delivery service shall be permitted within the unincorporated area of the County.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 47).
Full Breakdown
Section 5.148.050(a) of the County Ordinance Code, part of the 2018 cannabis chapter (Chapter 5.148), confines commercial cannabis to Mixed-Light Cultivation and Mixed-Light Nursery Cultivation licenses. The Department, together with the County Division of Environmental Health and the Department of Agriculture/Weights and Measures, may issue those licenses only for parcels the County General Plan Land Use Map designates Agriculture, or for parcels where the Agriculture Commissioner verifies at least three years of prior commercial farming. Every other commercial cannabis activity, including Outdoor Cultivation, Indoor Cultivation, Manufacturing, Testing, Microbusinesses, stand-alone Processing, and Retail Sales, is flatly disallowed, and even personal non-medical outdoor home-growing is barred in the unincorporated area under this section.
Subsection (b) carves out three narrow exceptions tied to a valid State License: transporting cannabis on public roads, delivering cannabis to a customer's door, and distributing cannabis among licensees. None of these permits a physical storefront, warehouse, or distribution hub in the unincorporated county; a delivery driver may cross into unincorporated territory to reach a customer, but the business itself must be based elsewhere.
Approved cultivation operations still face the chapter's dimensional standards: Section 5.148.160(d) requires cultivation structures to sit at least 300 feet from surrounding residential and business buildings, and Section 5.148.160(e) pushes the Premises 600 feet from any K-12 school, licensed day care, youth center, playground, or drug-treatment facility, and 600 feet from land the General Plan designates residential. Because incorporated cities set their own cannabis rules, San Mateo, Redwood City, and the other fourteen cities on the Peninsula are not covered by this county-only restriction.
Violations & Fines
Operating any Commercial Cannabis Activity without a County License, including unlicensed retail sale or out-of-zone cultivation, triggers Section 5.148.180 enforcement: a civil penalty up to three times the license fee for unlicensed activity, and escalating fines against a Licensee of $1,000 for a first chapter violation, $3,000 for a second within two years, and $5,000 for a third. A fourth violation within two years automatically revokes the License for at least three years and bars the owner from applying for any new license for that period.
Frequently Asked Questions
Can I open a cannabis dispensary in unincorporated San Mateo County?
Is cannabis delivery to my unincorporated address legal?
Where can a licensed cannabis grow actually be located?
What happens if someone runs an unlicensed cannabis business?
Sources & Official References
Other rules in San Mateo County
California rules heatmap·Compare San Mateo County to another location·View the California cannabis regulations overview
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