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Learning from The First Wave Part 3: Seven Basic Questions About Local Cannabis Ordinances & Real Estate

By Todd Feldman
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Part One of this series took a look at how the regulated cannabis market can only be understood in relation to the previous medical market as well as the ongoing “traditional” market. Part Two of the series describes how regulation defines vertical integration in California cannabis.

If you are considering getting involved in California cannabis, imagine the following sentence in ten-foot-tall letters made out of recently ignited $20 bills:

Before you put any money down on property, carefully examine the local cannabis ordinance and tax rates. 

This article is written in the form of advice to a newbie cannabis entrepreneur in California, but it will discuss issues that are also of significance to investors, as well as (to various degrees) cannabis entrepreneurs in other states.

Here are seven basic questions that you need to ask about local regulations (in order, except for Number 7).

1. What’s Your Jurisdiction?

If you’re in city limits, it’s the city. If you’re outside city limits, it’s the county.

2. Does the Jurisdiction Allow Cannabis Activities?

If the answer is yes, go to the next question. If the answer is no, pick another jurisdiction.

3. Where Does the Jurisdiction Allow Cannabis Activities?

A zoning ordinance will limit where you can set up shop. The limitation will probably vary by license type.

4. How Does the Local Ordinance Affect Facility Costs?

The short answer is: in many ways. Your local ordinance is a Pandora’s box of legal requirements, especially facility-related requirements.1 Read your local cannabis ordinance very carefully.

Generally speaking, the cannabis ordinance will set out two types of requirements – those that are specific to cannabis and those that apply generally to any business.

Looks great but . . . where are the sprinklers? Does it need a seismic upgrade? How about floor drains?
Photo by Wilhelm Gunkel on Unsplash

Cannabis-specific requirements:

  • Typically incorporate state cannabis laws by reference.
  • Have significant overlaps with state cannabis laws. For example, the state requires commercial-grade locks and security cameras everywhere cannabis may be found on a given premises. Local ordinances generally include similar requirements – keep in mind that you will need to comply with a combined standard that satisfies both state and local requirements.2
  • Vary greatly according to type of activity. For example, manufacturers will need to comply with Health & Safety Code requirements that can have a major impact on construction costs.
  • Vary greatly by jurisdiction when it comes to equity programs.

General requirements:

  • Include by reference building and fire codes, which can require very expensive improvements. Note that this means your facility will be inspected by the building department and the fire department.
  • Can include anything from Americans with Disabilities Act (ADA) requirements to city-specific requirements, such as Design Guidelines.
  • Will be zealously enforced because you’re a cannabis business.

5. What is the Enforcement Policy?

It may be that your local jurisdiction will give you temporary local authorization after meeting some, but not all, of the requirements. For example, you may be able to begin operations once you’ve provided your city or county with your cannabis permit application, a zoning clearance and a business permit. In this jurisdiction, you would be able to bring your building up to code sometime after you begin operations.

On the other hand, your local jurisdiction may require you to meet every requirement – from cannabis-specific security requirements to general building code and ADA requirements – before you can begin operations. Depending on the type of cannabis business (and facility condition), this might be inconsequential. Or it might mean that you will have to pay more than a year’s worth of rent (or mortgage) before you can start making money.

6. Can You Choose a Facility That Saves You Time and Money?

Of course, you won’t have to spend much time or money bringing your facility up to code if it’s already up to code. How likely it is that you will find such a facility varies wildly according to the type of cannabis activity in question. In general:

  • Service-side activities (delivery retail, storefront retail, distribution) are in many respects similar to their non-cannabis counterparts. From a facilities standpoint, the major differences come from security requirements. So, it may be possible to save time and money by choosing a facility that is already up to code for a similar use.
  • Manufacturing activities are trickier, since you will need food-grade facilities and equipment. You may be able to save money by setting up shop in a commercial kitchen.
  • Extraction with volatile solvents is a special (and particularly expensive) case, since it is inherently dangerous and requires special facilities.
  • Outdoor cultivation may be relatively unproblematic if it has an appropriate water source.
  • Indoor cultivation is expensive because of climate-control and lighting requirements. Buildings potentially suitable for large-scale indoor grows frequently come with significant problems. Former warehouses will typically require major power upgrades, while former factories may have inconvenient architecture and/or hidden toxic waste. In all cases, internal reconstruction is likely to be necessary, and will trigger all sorts of building and fire code requirements.

7. What Are the Local Cannabis Taxes?

Cannabis tax rates may be determinative. For example, Oakland imposes a 6.5% gross receipts tax on manufacturers that have gross receipts of less than $5M, and 9.5% on manufacturers that have gross receipts over $5M. In comparison, Santa Rosa only imposes a 1% gross receipts tax on manufacturers.

Local cannabis ordinances and taxes can make or break your business, so you need to understand them before you commit to a location. The seven basic questions listed above are designed to get you started.

This article is the opinion of the author and is not intended to be legal or other advice.


  1. For example, see Part II of the City of Oakland’s Administrative Regulations and Performance Standards, and The City of Los Angeles’s Rules and Regulations for Cannabis Procedures No. 3 (A)(14).
  2. For example, compare 16 CCR § 5044 (“Video Surveillance System”) with The City of Los Angeles’s Rules and Regulations for Cannabis Procedures No. 10 (A)(7).

Understanding Dissolved Oxygen in Cannabis Cultivation

By Aaron G. Biros

Oxygen plays an integral role in plant photosynthesis, respiration and transpiration. Photosynthesis requires water from the roots making its way up the plant via capillary action, which is where oxygen’s job comes in. For both water and nutrient uptake, oxygen levels at the root tips and hairs is a controlling input. A plant converts sugar from photosynthesis to ATP in the respiration process, where oxygen is delivered from the root system to the leaf and plays a direct role in the process.

Charlie Hayes has a degree in biochemistry and spent the past 17 years researching and designing water treatment processes to improve plant health. Hayes is a biochemist and owner of Advanced Treatment Technologies, a water treatment solutions provider. In a presentation at the CannaGrow conference, Hayes discussed the various benefits of dissolved oxygen throughout the cultivation process. We sat down with Hayes to learn about the science behind improving cannabis plant production via dissolved oxygen.

In transpiration, water evaporates from a plant’s leaves via the stomata and creates a ‘transpirational pull,’ drawing water, oxygen and nutrients from the soil or other growing medium. That process helps cool the plant down, changes osmotic pressure in cells and enables a flow of water and nutrients up from the root system, according to Hayes.

Charlie Hayes, biochemist and owner of Advanced Treatment Technologies

Roots in an oxygen-rich environment can absorb nutrients more effectively. “The metabolic energy required for nutrient uptake come from root respiration using oxygen,” says Hayes. “Using high levels of oxygen can ensure more root mass, more fine root hairs and healthy root tips.” A majority of water in the plant is taken up by the fine root hairs and requires a lot of energy, and thus oxygen, to produce new cells.

So what happens if you don’t have enough oxygen in your root system? Hayes says that can reduce water and nutrient uptake, reduce root and overall plant growth, induce wilting (even outside of heat stress) in heat stress and reduce the overall photosynthesis and glucose transfer capabilities of the plant. Lower levels of dissolved oxygen also significantly reduce transpiration in the plant. Another effect that oxygen-deprived root systems can have is the production of ethylene, which can cause cells to collapse and make them more susceptible to disease. He says if you are having issues with unhealthy root systems, increasing the oxygen levels around the root system can improve root health. “Oxygen starved root tips can lead to a calcium shortage in the shoot,” says Hayes. “That calcium shortage is a common issue with a lack of oxygen, but in an oxygen-deprived environment, anaerobic organisms can attack the root system, which could present bigger problems.”

So how much dissolved oxygen do you need in the root system and how do you achieve that desired level? Hayes says the first step is getting a dissolved oxygen meter and probe to measure your baseline. The typical dissolved oxygen probe can detect from 20 up to 50 ppm and up to 500% saturation. That is a critical first step and tool in understanding dissolved oxygen in the root system. Another important tool to have is an oxidation-reduction potential meter (ORP meter), which indicates the level of residual oxidizer left in the water.

Their treatment system includes check valves that are OSHA and fire code-compliant.

Citing research and experience from his previous work, he says that health and production improvements in cannabis plateau at the 40-45 parts-per-million (ppm) of dissolved oxygen in the root zone. But to achieve those levels, growers need to start with an even higher level of dissolved oxygen in a treatment system to deliver that 40-45 ppm to the roots. “Let’s say for example with 3 ppm of oxygen in the root tissue and 6ppm of oxygen in the surrounding soil or growing medium, higher concentrations outside of the tissue would help drive absorption for the root system membrane,” says Hayes.

Reaching that 40-45 ppm range can be difficult however and there are a couple methods of delivering dissolved oxygen. The most typical method is aeration of water using bubbling or injecting air into the water. This method has some unexpected ramifications though. Oxygen is only one of many gasses in air and those other gasses can be much more soluble in water. Paying attention to Henry’s Law is important here. Henry’s Law essentially means that the solubility of gasses is controlled by temperature, pressure and concentration. For example, Hayes says carbon dioxide is up to twenty times more soluble than oxygen. That means the longer you aerate water, the higher concentration of carbon dioxide and lower concentration of oxygen over time.

Another popular method of oxidizing water is chemically. Some growers might use hydrogen peroxide to add dissolved oxygen to a water-based solution, but that can create a certain level of phytotoxicity that could be bad for root health.

Using ozone, Hayes says, is by far the most effective method of getting dissolved oxygen in water, (because it is 12 ½ times more soluble than oxygen). But just using an ozone generator will not effectively deliver dissolved oxygen at the target levels to the root system. In order to use ozone properly, you need a treatment system that can handle a high enough concentration of ozone, mix it properly and hold it in the solution, says Hayes. “Ozone is an inherently unstable molecule, with a half-life of 15 minutes and even down to 3-5 minutes, which is when it converts to dissolved oxygen,” says Hayes. Using a patented control vessel, Hayes can use a counter-current, counter-rotational liquid vortex to mix the solution under pressure after leaving a vacuum. Their system can produce two necessary tools for growers: highly ozonized water, which can be sent through the irrigation system to effectively destroy microorganisms and resident biofilms, and water with high levels of dissolved oxygen for use in the root system.