Condo air conditioner noise rules: what to do

A defective outdoor air conditioner that vibrates or “rumbles” can quickly make condo living miserable. In divided co-ownership, noise disturbances are not merely a matter of courtesy: they affect your rights, the syndicate’s rules and the harmony of the building. If you are looking for what to do about noise from an outdoor unit, this guide summarizes the essentials: the law, the by-laws of the immovable, responsibilities and practical steps for the board of directors and co-owners in the Montreal area.

What the law and your co-ownership documents say

In Quebec, the Civil Code recognizes the principle of peaceful enjoyment between neighbours. “Unreasonable neighbourhood disturbances” include excessive noise from an appliance. Without quoting the full provision, remember that everyone must use their property in a way that does not unreasonably interfere with others (see section 976 C.C.Q., at LégisQuébec).

In co-ownership, your documents govern day-to-day matters:

• The declaration of co-ownership governs the use of the common portions and private portions and may impose restrictions on outdoor units (location, appearance and noise).
• The by-laws of the immovable often set out noise limits, maintenance obligations and the disciplinary process. They apply to all occupants and visitors.
• Balconies and terraces are often common portions for restricted use; installing an air conditioner there usually requires formal authorization from the syndicate or the board of directors.

In other words, even if you own the appliance, its operation must not cause unreasonable harm to other co-owners. In the event of a dispute, the normality of the noise is assessed based on the circumstances (time, intensity, frequency and available solutions).

For installation and safety, make sure you hire a contractor who holds the appropriate licence and complies with applicable standards; you can verify a licence on the RBQ website.

Diagnosis and responsibilities: who does what?

• If the noise results from a lack of maintenance (e.g. an unbalanced fan or loose supports), the co-owner of the appliance must correct the situation promptly.
• If the unit is attached to a common portion for restricted use (e.g. a balcony), the syndicate may require corrections concerning its location, vibration-isolating supports and required clearances.
• If the installation was never authorized, the board of directors may require it to be regularized (plan, technical data sheet and contractor’s certificate) or, if the co-owner refuses, require it to be relocated or removed, in accordance with the declaration of co-ownership and the by-laws.

The board of directors must deal with the complaint diligently: establish the facts (inspection, recordings and a neutral witness), verify compliance with the rules and then notify the co-owner concerned. Where the by-laws provide for them, fines or intervention costs may apply if the non-compliance continues after written notice.

From a safety and performance standpoint, regular maintenance often reduces noise: cleaning the fins, tightening the fasteners and replacing vibration pads. A diagnosis by a qualified contractor may also recommend an approved acoustic screen or replacement with a quieter unit. The RGCQ also shares good practices for managing noise in co-ownership; see its resources here: rgcq.org.

Managing a noise complaint: simple steps for the board and co-owners

Here is a realistic process that works well in the syndicates we support:

1. Document the problem
   • Keep a short log (date, time, duration and perceived intensity).
   • Record a few audio/video excerpts during the affected periods (morning and evening).
   • Note the unit’s location and the conditions (rain, thaw, etc.).
2. Review the declaration of co-ownership and the by-laws of the immovable
   • Look for clauses concerning outdoor units, decibel limits, hours and maintenance.
   • Confirm whether authorization from the board of directors was required and granted.
   • If necessary, consult the Civil Code of Quebec on LégisQuébec for the principles governing neighbours.
3. Notice and a reasonable deadline
   • The board of directors sends written notice to the co-owner of the appliance, with its observations and a request for corrective measures by a specific deadline.
   • Offer possible solutions: maintenance, vibration-isolating supports or an approved relocation.
4. Follow-up, measures and progressive sanctions
   • Determine whether the noise decreases after the corrective measures.
   • Apply the sanctions set out in the by-laws if the non-compliance continues (fines and costs).
   • Keep the evidence and decisions in the minutes of the board of directors’ meetings.
5. Recourse if necessary
   • Mediation or a demand letter as a last resort.
   • An application for an order (injunction) if the disturbance is serious and ongoing.
   • At the annual general meeting, inform co-owners of any necessary by-law amendments.

For effective, traceable handling, your administrative process (notice templates, complaint register, evidence retention and fine follow-up) is crucial. See our administrative management and operations management services for inspiration on a clear and consistent approach.

Useful clauses to add (or update) in the by-laws of the immovable

• Prior authorization from the board of directors for any installation on a balcony, roof or interior courtyard, together with a site plan and technical data sheet.
• Noise limits measured at the boundary of the private portion, and quiet periods (e.g. at night), consistent with municipal standards.
• A requirement to use a licensed contractor (with supporting proof) and to comply with clearances, anchors and vibration-isolating devices.
• Mandatory annual preventive maintenance, with proof provided to the syndicate upon request.
• Mitigation measures: vibration-isolating supports, an approved acoustic screen or relocation if necessary.
• A scale of progressive sanctions (notice, fine and verification costs), along with billing terms and arrangements for carrying out the work in the event of default.

These clauses reduce conflicts and protect the building’s appearance, structure and peace and quiet. Before taking effect, any amendment must comply with the procedures set out in the declaration of co-ownership and the Civil Code of Quebec. For day-to-day application and communication with occupants, a resident guide or summary sheet is very useful.

To learn more about equipment maintenance planning and periodic inspections, see our operations management services. And if you would like to compare service levels, see our packages.

This article provides general information and does not constitute legal advice. For your situation, consult a lawyer or notary.

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