Should My Building Be Ag Exempt?

If you’re planning to build a structure for farming, forestry, equine (horse-related), or dog training facility use, your project may qualify for an Agricultural Building Exemption (Ag Exemption) under state law (ORS 455.315).

This exemption allows certain agricultural buildings to be built without a building permit—but it also comes with important limitations. Before deciding, review the key differences below to see which path is right for your project.

Before you start, check your zoning

Ag Exemptions only apply to properties zoned for farm or forest use. If you’re unsure about your zoning, please contact our Planning Department office at zoninginfo@clackamas.us before proceeding.

Option 1: apply for a building permit

A permitted building gives you flexibility and long-term peace of mind.

Benefits:

• You can use the building for public access or events.
• You’re not limited to 10 people in non-growing areas.
• It meets full building code standards, helping with safety and resale value.

Things to know:

• Getting a permit means paying all related fees (building, system development charges, school taxes, etc.).
• It can save time and money later. Converting an Ag Exempt structure to a permitted one can be complex and costly.

Option 2: apply for an Agricultural Building Exemption

An Ag Exemption may be right for you if your building will be used only for agricultural operations and not open to the public.

Benefits:

• No building permit or building-related inspections required.
• No system development charges (SDCs) are assessed.

Things to know:

• You’ll still need land use approval and possibly other permits (erosion control, mechanical, electrical, or plumbing).
• You can’t host public events or allow public access in the building.
• You’re limited to 10 people at a time in non-growing areas.
• If you later decide to make the building permitted, it may require engineering reviews, code upgrades, and inspections.

Still unsure?

If you’re unsure which path suits your project, we can help. Contact our Building Division at bldservice@clackamas.us  to discuss your plans with permit staff or submit a zoning inquiry.