Before You Build, You Need Approvals
Building a barn in Ontario isn't just about construction — it requires careful planning to meet provincial nutrient management regulations. If your barn will house livestock, you'll almost certainly need a Nutrient Management Strategy (NMS) before you can break ground.
Timeline Risk
Approval processes take several weeks. Starting late can delay your entire construction season. Delays can cost you a full growing season.
Approvals You May Need
Nutrient Management Strategy (NMS)
Building permit from your municipality
Site plan approval
Nutrient Management Plan (NMP) if over 300 nutrient units
Environmental compliance approval
What Triggers an NMS
Under Ontario Regulation 267/03, an NMS is typically required when you're constructing or expanding a livestock barn, increasing nutrient storage, or making changes that increase the nutrient generation on your farm.
Frequently Asked Questions
Do I need an NMS to build a barn in Ontario? In most cases, yes — if you are increasing livestock or nutrient storage capacity, you will likely need a Nutrient Management Strategy (NMS) before construction can begin.
What are nutrient units? A nutrient unit is a measurement used under Ontario's Nutrient Management Act to determine the regulatory requirements for your farm. It's based on the type and number of livestock you have.
When do I need both an NMS and an NMP? Typically when your farm operation exceeds 300 nutrient units, you'll need both a Nutrient Management Strategy (NMS) for storage and expansion, and a Nutrient Management Plan (NMP) for land application of nutrients.
How long does approval take? Approval timelines vary depending on the complexity of your operation. Most plans take several weeks from farm visit to final approval. Starting early is critical — delays can cost you a full growing season.