The Borough may require any owner to prune, trim or cut down a tree if the
latter is endangering the public security or hampering the use or maintenance of
the public roadway. In the case of refusal or negligence of the owner with
respect to pruning, trimming or cutting down the tree, the Borough may proceed
with the work as long as a notice concerning the work is sent to the owner
beforehand. Nonetheless, the Borough may, without warning and at the owner’s
expense, prune, trim or cut down a tree whose condition or location constitutes
a danger requiring emergency intervention.
The minimum space that must be respected with respect to a building is 30 m
for poplars and 10 m for silver maples and willows.
Saint-Laurent tree bylaws prohibit the cutting of trees on private property
that have a diameter of 5 cm or more when measured at a height of 1.5 m without
the permission of the Division des permis et inspections.
A tree may be cut down only if it is:
• dead or afflicted with an
• a public health or safety hazard;
severe nuisance or cause of property damage;
• an obstacle to
construction of an authorized building.
Furthermore, the following is prohibited:
• damaging or cutting down trees, shrubs, or ornamental plants in the
strip of land located between the edge of the road or the sidewalk and the
• planting a tree within 2 m of a fire hydrant, service
entrance or lamp-post;
• pruning the top of a tree or shrub by more than
• cutting select branches from a tree to give it a special
Any tree that is cut down, dead, or damaged must be replaced by a new tree
which, at maturity, will be at least the same size as the one it is replacing.
Planting and greenery
Tree-planting is required for any construction project at a rate of one
tree for every 10 m of street frontage. At the time of planting, the tree trunk
must measure at least 5 centimetres in diameter when measured at a height of 1.5
m, and a height of at least 3.5 m measured from the base to its highest
A property on which a new commercial or industrial building is erected
must comprise one or more green spaces covering at least 15% of the surface
In Saint-Laurent, tree heritage is a major concern for municipal
administration. Numerous bylaws ensure the protection of existing trees.
Accordingly, they must be protected when they are found near construction
projects. It is against the law to damage them in any way, to climb them, to
attach a bicycle or animal to them, or to glue, nail, staple, or affix a sign to
by-law (French only)