Tiny Homes on Farms in WA: The Agricultural Exception

Imagine waking up to the rolling hills of the Palouse, the misty air of the Skagit Valley, or the sun-drenched orchards of Yakima. For many Washingtonians, the dream of placing a tiny home on a beautiful piece of rural land is a powerful one. But often, that dream runs into a wall of complex zoning codes and land-use restrictions. If you own a farm or agricultural property, however, there’s a special key that can unlock this possibility: the agricultural exception.

Washington State has a unique and powerful law that specifically addresses the need for housing on farms. This opens up an incredible opportunity for landowners to provide comfortable, efficient, and modern housing for their workers using tiny homes. It's a pathway that bypasses many of the typical hurdles, making it one of the most practical routes for placing a tiny home on farmland in WA.

Let's dive into the details of this game-changing rule and explore how you can leverage it for your property. For a complete overview of all placement options in the state, be sure to check our general guide to tiny home laws in Washington.

Understanding RCW 70.114A: Your Key to Rural Placement

The heart of the agricultural exception is a piece of state legislation known as Revised Code of Washington (RCW) 70.114A. Think of this law as the golden ticket for farmers. In simple terms, it establishes a framework for “Temporary Worker Housing,” and it specifically states that this type of housing is a permitted use on agricultural land.

This is huge. Normally, adding a dwelling to a property is subject to a long list of local zoning requirements, including density limits (how many homes per acre), specific use districts, and often a lengthy permitting process. The use of RCW 70.114A for tiny homes creates a state-level override for a very specific purpose: housing agricultural workers.

What does this mean for you as a landowner? It means that if you need to house employees who work on your farm, you can use structures like tiny homes or park model RVs to do so, even if your local zoning code doesn't explicitly mention them. This is a direct, legal pathway created by the state to support its vital agricultural industry.

State Preemption: How This Law Bypasses Strict Local Zoning

The most powerful component of RCW 70.114A is a legal concept called "state preemption." This sounds complicated, but the idea is simple: when state law and local law conflict, the state law wins. In this case, the state of Washington has declared that providing agricultural worker housing in Washington is so important that it preempts, or overrules, local zoning codes that might otherwise prohibit it.

Local jurisdictions can't simply ban this type of housing. Their review is typically limited to more basic safety and access criteria, such as:

• Building setbacks from property lines
• Building height restrictions
• Ensuring safe road access for emergency vehicles
• Proper water and septic connections

They cannot, however, deny the use itself. This preemption prevents a situation where a farmer in one county has a clear path to housing workers while a farmer in a neighboring county is blocked by restrictive local ordinances. It creates a more uniform and predictable standard across the state for providing essential temporary housing on rural land.

Department of Health (DOH) Licensing: When Is It Required?

While state law streamlines the zoning, it also ensures that the housing provided is safe and sanitary. This is where the Washington State Department of Health (DOH) comes in. The DOH has specific farm worker housing rules in WA to protect the health of residents.

DOH licensing is mandatory if the housing you provide meets either of these thresholds:

• It will house 10 or more occupants.
• It consists of 5 or more dwelling units (e.g., five tiny homes).

If your project meets or exceeds these numbers, you must apply for a license from the DOH and ensure your housing—whether it's tiny homes, RVs, or other structures—complies with the health and safety standards outlined in WAC 246-358. These regulations cover essentials like clean water, functional septic systems, ventilation, and safe living spaces.

What About Smaller Operations?

If you plan to house 9 or fewer occupants in 4 or fewer units, you have a choice. You are not required to get a DOH license, but you can voluntarily opt into the DOH program to ensure you're meeting best practices. If you don't, you'll simply default to any applicable local county health and safety regulations.

Defining "Temporary Worker Housing": Who Qualifies?

This is a critical piece of the puzzle. The agricultural exception is not a loophole for creating a personal tiny home retreat or a rental property for the general public. The law is very specific about its purpose.

To qualify under RCW 70.114A, the housing must be:

1. For Agricultural Workers: The occupants must be employed in agricultural labor, such as planting, cultivating, harvesting, or processing crops. The housing is tied directly to the work being performed.
2. Located on a Rural Worksite: The housing must be on or very near the farm, orchard, or ranch where the employees work.
3. Provided by the Employer: The housing is typically provided by the agricultural employer for their employees, often as part of their compensation or for a nominal rent.

The term "temporary" can refer to seasonal work, like for a specific harvest (e.g., cherry harvest camps), but the state also recognizes that some agricultural work is year-round. The key is that the housing's purpose is tied to the employment on the farm.

A Look at County-Specific Ag Rules

While the state law provides the overarching framework, it’s always wise to understand how your specific county interprets and implements these rules. Here are a few examples from across Washington:

King County

King County has a designation for "Agricultural Employee Dwelling Units" (AEDUs). The county allows one mobile home or stick-built home under 1,000 sq. ft. for properties under 20 acres, with more allowed for larger parcels. This aligns with the state's intent and provides a clear local process for farmers.

Island County

On Whidbey and Camano Islands, the rules are also quite clear. Island County code allows one RV, trailer, or Park Model with a Labor & Industries (L&I) insignia to be placed on a farm for up to 180 days per year specifically for farmworker use. This is a great option for farms needing seasonal, not year-round, housing.

Skagit County

Skagit County, a major agricultural hub, directly acknowledges the state preemption in its zoning code. It lists temporary farmworker housing as a permitted use in its primary agricultural zones (Ag-NRL), deferring to the state DOH for health and safety regulations. This is a perfect example of a county working in harmony with state law.

Is an Agricultural Tiny Home Right for Your Property?

Leveraging the agricultural exception is a fantastic way to add value to your farm and attract and retain a quality workforce. A well-designed tiny home from Clever Tiny Homes can provide a durable, comfortable, and dignified living space for your employees that far surpasses traditional options.

Before you move forward, ask yourself a few key questions:

• Is my property zoned for agriculture? This exception is specifically for agricultural land.
• Do I have a documented need to house employees who work on my site? The housing must be for your workers.
• Am I prepared to meet the DOH standards for water, septic, and safety? This is a non-negotiable part of the process.
• What type of tiny home do I need? The rules are flexible, allowing for units certified as RVs (with a L&I blue/green seal) since the use is temporary or employment-based. For a deeper dive into what the different L&I certifications mean for placement, our comprehensive Washington Tiny Home Laws: A 2024 Placement Guide is a must-read.

Living and working on a farm offers a unique lifestyle—one of independence and connection to the land. It stands in contrast to the more structured environment of planned communities. If you're curious about that alternative, you can explore the Top Tiny Home Communities in Washington to see the full spectrum of tiny living options.

The agricultural exception is one of the most powerful but least-known pathways for tiny home placement in the state. If you’re a farmer or agricultural landowner, it’s an opportunity you can’t afford to overlook. Ready to explore the models that could work for your farm? Check out our full range of options and learn more about navigating the process here in Washington.