Arborist Licensing By-law

Here's how to apply

1. Review the classes available for licensing to see which licence to apply for:
   • Arborist Consulting Company
   • Arboricultural Company
   • Tree Company
   • Landscaping/tree Company

2. You can now submit your business licence application online. Use Chrome or Safari for the best experience. If this is your first time using the town’s online services, you will need to create an account by setting up a user name and password. Select sign in and then select the option to sign up. If you already have a town account, you may be able to use your username and password which you previously created.

Submission Standards

Help us process your application faster by submitting your documents in the following format:

• Save files in a pdf format.
• Organize documents as separate files. Document types can contain multiple pages, such as drawings or floor plans.
• Name your files appropriately, i.e. AMCE Articles of Incorporation.pdf. This saves significant time in processing your application.
• All files should be easy to read, i.e. scanned documents.
• Ensure all required documentation is added to your application submission or your application will be delayed.
• Resubmissions: In the event you are requested to resubmit materials, please only submit those requested. Do not resubmit the entire application package unless requested to do so.

For more information please refer to the Arborist Licensing by-law.

For questions please contact ServiceOakville by phone at 905-845-6601.

There are four licence classes that capture the nature for the work done by arborists and their respective companies.

The classes are as follows:

Class A: Arborist Consulting Company

"Consulting Arborist" means a person or company trained and has the knowledge to assess health and structure of a tree but does not include work that requires climbing (working aloft).

Class B: Arboriculture Company

"Arboriculture Company" means a company with knowledge of all aspects of arboriculture and has staff holding valid certifications in the following areas:

• Arborist
• Certified Tree Worker
• Certified Chainsaw Operator

and may include

• Utility Arborist

An arboriculture Company is able to assess health and structure of tree, conduct tree maintenance work and provide tree risk assessment, valuation or recommendation.

Class C: Tree Company

"Tree Company" means a company capable of removing, pruning, root pruning, bracing and propping, fertilizing, planting, stumping or transplanting a tree but not able to assess the health and structure a tree.

A Tree Company must have staff holding valid certifications in the following areas:

• Certified Tree Worker
• Certified Chainsaw Operator
• Utility Arborist

Class D: Landscaping/Tree Company

"Landscaping/Tree Company" means a company that undertakes or is engaged in the business of managing lawns/yards including but not limited to; installing sprinkler systems, building retaining walls, constructing patios, digging, irrigation and drainage channels, paving or sealing paved driveway surfaces, installing stone, brick or concrete landscapes, planting shrubs, laying sod/grass, erecting fences, seasonal mowing/seeding/thatching/aeration/fertilization/raking, and snow ploughing/snow removal/anti-ice application and that is capable of removing, pruning, root pruning, cabling (bracing and propping) fertilizing, planting, stumping, transplanting a tree but not able to assess the health and structure of a tree. A Landscaping/Tree Company must have staff holding valid certifications in the following areas:

• Certified Tree Worker
• Certified Chainsaw Operator
• Utility Arborist

Arborist Consulting Company

• Certified by the Ministry of Advanced Education and Skills Development (MTCU) or the International Society of Arboriculture
• ​Currently accepted as a consulting arborist with the American Society of Consulting Arborists
• ​Registered Professional Forester (RPF) as defined in the Professional Foresters Act, 2000, S.O. 2000, c. 18.

Certified Tree Worker

• International Society of Arboriculture (ISA) Certified Tree Worker Climber Specialist
• Humber College Apprenticeship (an apprentice performing the work of a certified tree worker must be under the direct supervision of a certified tree worker on the site.)
• Humber College, Flemming College or Algonquin College diploma in Urban Arboriculture

Certified Chainsaw Operator (trainer must be approved by the MTCU)

• IHSA*, Chain Saw Operator
• Arboricultural Canada-Chain Saw
• Landscape Ontario-Chain Saw
• Niagara Parks Program-Chain Saw Operator (Horticultural certificate)
• Company in-house training with certified trainer (trainer number must be identified on certificate)

*affiliate agencies may be accepted. Please contact office for more information.

Utility Arborist

• MTCU-Utility Arborist
• ISA-Utility Arborist, 1-Proficiency Certificate, 2-Safety and Awareness Certificate (must be under direct supervision of journeyperson)
• Certified Provincial Arborist-Arboriculture, Utility Arborist
• Ministry of Advanced Education and Skills Development 6000 practical hours and provincial exam

Don't meet the requirements listed above?

For any worker that holds a college diploma in arboriculture and gains experience as an apprentice or has a combination of 6000 hours of experience can meet the requirements set under the arborist licensing by-law by successfully completing challenge exams to become certified.

Please see below for information on challenge exams from select governing associations and/or college of trades:

• International Society of Arborists (ISA)
• Ministry of Advanced Education and Skills Development (MTCU)