Local tree-rule guide
Calgary tree rules
Calgary’s Tree Protection Bylaw protects City/public trees and expressly does not apply to ordinary private-property trees.
The local rule
Public-tree bylaw
Calgary’s Tree Protection Bylaw protects City-owned/public trees and expressly says it does not apply to trees growing on private property.
Do not touch City trees
Cutting, removing, moving or pruning a City tree—or interfering with its protection zone—requires City authorization.
Enforcement
The City publishes fines for public-tree bylaw offences, with serious infractions potentially subject to higher penalties under provincial authority.
Local exceptions and conditions
Scope and protected trees
- Calgary's Tree Protection Bylaw protects trees on land owned or controlled by the City.
- It expressly does not impose a private-tree diameter threshold on an ordinary backyard tree.
- The first practical step is therefore finding the property line, especially where a boulevard tree grows just inside a front lawn or a neighbouring public strip.
- A large private spruce does not become a City permit case merely because it is large; a much smaller public tree cannot be pruned, removed or damaged without permission.
- Calgary directs residents to 311 when ownership is unclear.
Applications and timing
- For development or construction within six metres of a City tree, Calgary calls for a tree protection plan.
- A garage excavation, service trench or driveway equipment route may trigger that review even if the public trunk remains.
- The plan should show work limits, access and how roots, grade and branches are protected; City Urban Forestry handles permission for work on City trees and its contractor list identifies authorized tree workers.
- There is no citywide private-tree removal application or standard turnaround under this bylaw, so do not quote a permit timeline for private-yard cutting.
- A City-tree review has to be completed before the work that creates the impact.
Enforcement and exceptions
- Calgary's public guidance gives fine examples from $100 for attaching an object to a City tree to $1,000 for failure to comply with an enforcement order, and says the provincial Municipal Government Act permits higher fines for serious tree and shrub bylaw infractions.
- Restoration costs are separate.
- A realistic mistake is treating a boulevard ash as the homeowner's tree and letting an arborist remove it with the adjacent private tree.
- For a notable or heritage tree, the linked public-tree bylaw does not provide a general private-property heritage category or species-specific diameter exemption; check a property's development conditions and any public ownership separately.
Small actions that affect public trees
- Calgary's public-tree rule reaches actions that can look too small to be tree work: attaching a sign or electrical cord, penetrating bark, spraying anything other than water, planting on City land, or entering a marked protection zone without authority.
- A homeowner who wants to string seasonal lights on a boulevard tree or put a contractor sign on it is dealing with City property even though no trunk is being felled.
- The City's posted fine examples start at $100 for attaching an object, reach $1,000 for disobeying an enforcement order, and note that the Municipal Government Act can permit a more serious $10,000 response.
- Replacement and installation costs are separate from the ticket.
Development review
- A development application has an order of operations here.
- The City describes public-tree removal as a last resort and asks for the public tree and stump removal form with site-plan drawings.
- It says removal authorization is withheld until the relevant development or building permit for a house move or demolition is approved.
- Written permission to prune or remove a public tree does not let any crew do it: use an authorized contractor on the City's list or a contractor meeting the specified arborist, insurance, WCB and equipment requirements.
- A private spruce and a public spruce on the same infill frontage can therefore have radically different approval paths.
- The tree plan should cover temporary fencing and access throughout construction, rather than only the day the new foundation is poured.
Before work starts
- Ownership: check the property line. Public and boundary trees may follow a different process.
- Site context: review any development approval, covenant or protected-area conditions.
- Work requirements: confirm any permit, exemption or protection requirements that apply to the planned work.
Official sources
Last verified: September 28, 2026 · Primary municipal source reviewed September 23, 2026. Rules can change; confirm with the local authority before work. How we research
Local detail review: September 28, 2026.