Information on this website is for planning and educational purposes only. Final requirements must be confirmed with the appropriate municipality, county, conservation authority, OMAFRA/provincial review process, builder, designer, engineer, and approval agencies. LandLogic does not issue permits, guarantee approvals, or replace official regulatory review.
Understanding MDS Calculations
Minimum Distance Separation (MDS) calculations determine how far a livestock barn or manure storage must be from neighbouring land uses. The calculations consider several factors specific to your operation and location.
Important Note
This page provides a general overview only. MDS calculations involve specific factors and variables that require professional assessment. We do not include exact formulas — contact us for a site-specific assesment.
Key Factors in MDS Calculations
Type of livestock (dairy cattle, beef cattle, swine, poultry, etc.)
Number of animals or total nutrient units
Type of manure system (solid, liquid, or mixed)
Type of manure storage (covered, uncovered, earthen, concrete)
Type of neighbouring land use (residential, commercial, institutional)
Whether the neighbouring area is a settlement or rural zone
Existing vs. proposed operation (MDS I vs. MDS II)
How MDS I Differs from MDS II
MDS I and MDS II use similar factors but apply them differently. MDS I protects new development from existing farms, while MDS II protects existing neighbours from new or expanding farms. The calculation approach and resulting distances can differ significantly.
Why Professional Help Matters
MDS calculations involve multiple variables and can be complex. An incorrect calculation can lead to barn placement that doesn't meet requirements, resulting in costly project delays or redesigns. A qualified professional can accurately assess your site and determine the correct MDS distances.
Related Resources
MDS is only one part of planning a livestock barn or manure storage project. These pages can help you check setbacks, nutrient units, NMS requirements, pricing, and consultant support.
Advanced MDS Calculator
Estimate planning-level MDS setbacks for barn and manure storage before choosing a final site.
MDS I & MDS II Explained
Learn the difference between MDS I and MDS II and when each applies to barn planning or nearby land uses.
Calculate Nutrient Units
Estimate livestock nutrient units to help determine whether nutrient management requirements may be triggered.
Building a Barn in Ontario
Review the main planning steps for barn projects, including MDS, nutrient units, manure storage, and approvals.
Nutrient Management Strategy
Building or expanding livestock may trigger a Nutrient Management Strategy. Learn when an NMS may be required.
Typical NMS/NMP Costs
See typical pricing ranges for new barn NMS, livestock expansion NMS, Nutrient Management Plans, and NMS + NMP Packages.
Tools
Can I Build a Barn Here?
Check whether a proposed barn location may be constrained by MDS, setbacks, or nearby land uses.
Use the Advanced MDS Calculator
Estimate detailed MDS-related setback planning for livestock barns and manure storage.
Calculate Nutrient Units
Estimate livestock nutrient units to help determine whether NMS or NMP requirements may be triggered.
Frequently Asked Questions
Do I need an NMS to build a barn in Ontario?
What are nutrient units and how does this relate to livestock?
When do I need both an NMS and an NMP?
How long does approval of a NMS or NMP take?