Conservation Authority Permits Ontario
Complete guide to obtaining permits from Ontario's 36 Conservation Authorities. Covers regulated areas, application process, timelines, and costs for development near water, wetlands, and hazardous lands.
What Are Conservation Authorities?
Conservation Authorities (CAs) are local, community-based environmental organizations created by the Province of Ontario. There are 36 Conservation Authorities across Ontario, each responsible for watershed management, flood control, and natural hazard protection in their jurisdiction.
CAs have regulatory authority under the Conservation Authorities Act and Ontario Regulation 41/24 (effective April 1, 2024) to control development in areas where natural hazards could pose a risk to public safety or property.
What CAs Regulate
- • Watercourses: Rivers, streams, creeks, canals
- • Shorelines: Lakes and Great Lakes
- • Wetlands: Provincially Significant Wetlands (PSWs)
- • Floodplains: Areas subject to flooding
- • Valley lands: River and stream valleys
- • Hazardous lands: Unstable slopes, erosion-prone areas
- • Alterations: Fill placement, grading, excavation
Why This Matters
- • Public safety: Prevent development in flood-prone areas
- • Environmental protection: Preserve wetlands and natural habitats
- • Erosion control: Protect shorelines and slopes
- • Water quality: Maintain watershed health
- • Legal requirement: Building permits cannot be issued without CA clearance
- • Financial protection: Reduce flood damage and insurance costs
When Do You Need a Conservation Authority Permit?
A permit is required if your property or proposed activity is within a "regulated area."
Regulated areas vary by Conservation Authority but generally include land within or adjacent to river valleys, streams, wetlands, shorelines, and floodplains. The only way to know for certain is to contact your local CA or check their online mapping tools.
Regulated Activities Requiring a Permit
Development & Construction:
- • New home construction
- • Home additions or renovations
- • Accessory buildings (sheds, garages)
- • Decks and porches
- • Swimming pools
- • Retaining walls
- • Driveways and parking areas
Site Alterations:
- • Grading or excavation
- • Fill placement
- • Tree or vegetation removal
- • Shoreline alterations
- • Channel modifications
- • Drainage work
- • Landscaping in regulated areas
Common Regulated Area Triggers
Watercourses (Rivers, Streams, Creeks)
Typically within 30-100m of watercourse, depending on CA. Includes intermittent and seasonal streams.
Wetlands
Within 120m of Provincially Significant Wetlands (PSWs). All wetlands may be regulated by some CAs.
Lake and Great Lakes Shorelines
Varies by CA and lake. Often 15-30m from shoreline. Lake Ontario shoreline heavily regulated.
Floodplains
Areas subject to flooding from watercourses or Great Lakes (regulatory flood + allowance). Can extend several hundred meters.
Hazardous Lands
Unstable slopes, erosion-prone areas, steep valley sides. Often 15m from top of slope.
How to Check If Your Property Is Regulated
- 1.Find your Conservation Authority: Determine which CA has jurisdiction (see list below)
- 2.Check online mapping: Most CAs have online GIS tools showing regulated areas
- 3.Request determination: Contact CA directly with property address for official determination
- 4.Pre-consultation: Book free pre-consultation meeting to discuss your project
Conservation Authority Permit Application Process
Pre-Consultation (Optional but Recommended)
- Contact CA to request pre-consultation meeting
- Discuss project scope and permit requirements
- Identify required technical studies
- Understand site-specific constraints
- Clarify application requirements
- Most CAs offer this service free of charge
Gather Required Studies and Documents
- Survey/site plan showing property boundaries and features
- Detailed plans of proposed development (elevations, floor plans)
- Natural Hazard Study (if in floodplain or hazardous land)
- Environmental Impact Study (EIS) - wetland/habitat impacts
- Geotechnical report (unstable slopes, foundations)
- Hydrological/hydraulic study (flooding, drainage)
- Tree inventory and compensation plan
- Stormwater management plan
- Hire qualified professionals (engineers, ecologists) for studies
Submit Complete Application
- Complete CA permit application form
- Include all required technical studies and plans
- Submit survey and property information
- Pay application fee (varies by CA and project complexity)
- Application deemed "complete" when all information provided
- 90-day review period begins when application is complete
Technical Review
- CA staff review application for compliance with regulations
- Technical review of all submitted studies
- May request additional information or revisions
- Clock stops if additional info requested
- Internal circulation to relevant CA departments
- May coordinate with municipal planning department
Decision
- CA issues written decision (approved, approved with conditions, or refused)
- Conditions may include: mitigation measures, monitoring, securities
- Permit valid for up to 60 months (5 years)
- If refused, written reasons provided
- If no decision within 90 days, can appeal to OLT
Appeal Period (If Applicable)
- Applicant can appeal refusal to Minister within 15 days
- Hearing may be scheduled if permit refused or conditions disputed
- Minister reviews permit decision within 30 days
- Final appeal to Ontario Land Tribunal possible
- Most applications approved with conditions (high approval rate)
Construction and Compliance
- Obtain building permit from municipality (CA clearance required)
- Comply with all permit conditions
- Notify CA before starting work
- CA may conduct site inspections during construction
- Submit monitoring reports if required
- Certificate of completion may be required
Total Timeline: 4-9 Months
- • Studies and reports: 4-12 weeks
- • CA review: Up to 90 days (legislated)
- • Simple projects: 4-6 months total
- • Complex projects: 6-9+ months
- • Factor this into your overall project timeline
Cost of Conservation Authority Permits
Costs vary significantly by Conservation Authority and project complexity. Fees are based on cost recovery principles but are not standardized across Ontario. Contact your specific CA for current fee schedules.
Application Fees
Minor projects: $300-$1,500
Major projects: $1,500-$5,000+
TRCA example: Base fee + 50% per year beyond 2 years
Non-refundable
Technical Studies
Environmental Impact Study: $5,000-$25,000
Natural Hazard Study: $3,000-$15,000
Geotechnical Report: $2,000-$8,000
Hydrological Study: $5,000-$20,000
Total Project Costs
Simple residential: $5,000-$15,000
Complex residential: $15,000-$50,000
Commercial/subdivision: $50,000-$200,000+
Budget 10-20% of project cost
Cost Breakdown Example: Residential Addition in Floodplain
Note: Costs vary widely. This is a typical mid-range example. Complex projects can cost 3-5× more.
Find Your Conservation Authority
Search by city or Conservation Authority name
Toronto and Region Conservation Authority
TRCA • Greater Toronto Area
Municipalities served:
Largest CA in Ontario, regulates extensive watersheds and Lake Ontario shoreline
Credit Valley Conservation
CVC • Peel Region / West GTA
Municipalities served:
Regulates Credit River watershed
Central Lake Ontario Conservation Authority
CLOCA • Durham Region East
Municipalities served:
Lake Simcoe Region Conservation Authority
LSRCA • Lake Simcoe / York Region North
Municipalities served:
Protects Lake Simcoe watershed
Halton Region Conservation Authority
Halton Conservation • Halton Region
Municipalities served:
Niagara Peninsula Conservation Authority
NPCA • Niagara Region
Municipalities served:
Grand River Conservation Authority
GRCA • Waterloo / Brant / Wellington
Municipalities served:
Nottawasaga Valley Conservation Authority
NVCA • Simcoe County / Dufferin
Municipalities served:
Common Challenges & Tips
Long Timeline Delays Project
Start CA process early - before finalizing building design. Run CA application parallel to municipal planning approvals. Build 6-9 month CA timeline into project schedule.
Expensive Technical Studies Required
Pre-consultation helps identify which studies truly needed. Some studies can serve multiple purposes (CA + municipal). Get quotes from multiple consultants. Consider if project design can avoid regulated areas entirely.
Don't Know If Property Is Regulated
Check CA online mapping tools first. Request written determination from CA before purchasing property or designing project. Most CAs provide this service free or low cost.
Permit Denied or Heavy Conditions
Redesign project to address CA concerns. Consider alternatives (relocate building, reduce footprint). Professional consultants can help navigate conditions. Appeal available to Minister if refused.
Coordination with Municipal Permits
CA clearance required before building permit issued. Some municipalities coordinate reviews. Submit to both simultaneously. Keep both authorities informed of status.
Need Help With Conservation Authority Permits?
Our team has extensive experience working with Conservation Authorities across Ontario. We handle all technical studies, permit applications, and coordinate with CAs to get your project approved.
Regulated Area Assessment
Determine if CA permit required and identify constraints
Complete Application Package
All studies, reports, and drawings prepared by qualified professionals
CA Liaison & Approvals
We coordinate with CAs and address all review comments
Free consultation • Experience with all major Ontario CAs • Fast permit approvals