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Permits & Legal Requirements
Do You Need a Permit for Your Balcony Project?
In Montreal and most surrounding municipalities, a balcony project is rarely as simple as picking up tools and getting to work. In many cases, you are legally required to obtain a building permit before starting — even if the work seems minor from a visual standpoint.
A permit ensures that your balcony design meets structural, safety, and zoning regulations in accordance with the Quebec Construction Code and local municipal bylaws.
Permit Required When:
You must apply for a permit if you plan to:
Build a new balcony (any height or size).
Replace or enlarge an existing balcony, even if you use the same material.
Change structural supports (beams, columns, or anchoring systems).
Alter railing height, design, or material in a way that changes safety performance.
Change balcony location or add a new one where there wasn’t one before.
Permit May Not Be Required When:
Some small-scale, cosmetic repairs may be exempt from permitting:
Repainting, refinishing, or sealing without changing the structure.
Patching small cracks or replacing minor surface areas with identical materials.
Cleaning or power washing.
⚠ Important: Even for small repairs, certain boroughs still require notice or inspection. Always confirm with your borough permit office before starting — what’s exempt in one area may require approval in another.
Permit Costs (Montreal Example):
$9.80 per $1,000 of total work cost (materials + labor).
Minimum fee: ~$164.20 for residential properties.
Minimum fee: ~$482.50 for commercial or institutional buildings.
Additional fees may apply for expedited processing or additional inspections.
Why Getting a Permit Matters:
Avoids costly fines for unauthorized work.
Ensures your balcony meets safety codes, reducing liability risks.
Protects property value — unpermitted work can complicate future sales.
May be required by your insurance provider for coverage in case of an accident.
Borough-Specific Rules:
Regulations vary, but common thresholds include:
Balcony floor over 60 cm (24 in) above ground → permit required.
Balcony floor over 1 m (39 in) above ground → additional structural documentation from a licensed professional may be required (architect, engineer, or borough inspector approval).
Historic districts or designated heritage properties often have extra design restrictions and approval processes.
- Over 60 cm (24 in) above ground → permit required.
- Over 1 m (39 in) → additional professional documentation may be needed.
- Pro Tip: Apply for your permit before ordering materials or scheduling contractors. Permit approval times vary; in peak construction season, delays can last several weeks.
Permit Required When:
Building a new balcony.
Replacing or enlarging an existing balcony.
Changing structural supports or materials.
Altering railing height or design.
Permit May Not Be Required When:
Minor repairs
Without changing materials or dimensions (e.g., repainting, small patching)
