Declaration of Co-Ownership in Quebec: Content and Rules
Table of Contents
- What Is a Declaration of Co-Ownership in Quebec?
- The Three Parts of a Declaration of Co-Ownership
- What Must the Constituting Act Contain?
- Building By-Laws: Rules and Governance
- Description of the Fractions
- How to Amend a Declaration of Co-Ownership
- Common Mistakes and Key Considerations
- Conclusion
- Frequently Asked Questions (FAQ)
In Quebec, divided co-ownership is governed by a fundamental legal document: the declaration of co-ownership. Often overlooked, it defines the financial, administrative, and legal rules that structure the life of the building. Here is a complete guide to understanding its content and practical implications.
What Is a Declaration of Co-Ownership in Quebec?
Legal Definition and Fundamental Role
The declaration of co-ownership is the legal document that governs any divided co-ownership in Quebec. It forms the legal foundation of the property and defines the rights, obligations, and rules applicable to all co-owners.
Specifically, it is a notarial deed published at the Quebec Land Registry. Upon publication, the co-ownership officially exists and the syndicate of co-owners is created. Without a declaration, divided co-ownership cannot legally exist.
This document establishes, among other things, the destination of the immovable, the allocation of common expenses, and the internal governance rules. It also governs day-to-day management and the powers of the board of directors.
In other words, the declaration acts as the “constitution” of the co-ownership.
When Is It Created?
The declaration of co-ownership is drafted when a divided co-ownership project is created. It is generally prepared by the developer, with the assistance of a notary and real estate law professionals.
Before units are sold, the developer must publish the declaration at the Quebec Land Registry. This publication formalizes the cadastral division of the fractions and allows the legal sale of units.
In some cases, an existing property may be converted, for example when a rental building is transformed into condominiums. In such situations, the declaration remains essential.
Why Is It Essential for the Syndicate?
Upon publication, the declaration automatically creates the syndicate of co-owners. The syndicate becomes responsible for administering, preserving, and managing the common portions of the building.
The declaration specifies the powers of the syndicate, voting rules, required majorities, and each co-owner’s financial contribution.
It also serves as the primary reference document in the event of disputes between co-owners. In practice, it is the first text consulted when conflicts arise. To better understand how it applies in practice, you may consult our detailed article on the operation of a co-ownership syndicate, which explains its responsibilities and powers.
The Three Parts of a Declaration of Co-Ownership
The declaration of co-ownership is divided into three main sections. Each plays a distinct and complementary role. Moreover, under the Civil Code of Quebec, the declaration must include the constituting act, the building by-laws, and the description of the fractions. This structure is mandatory under Quebec law.
Constituting Act of Co-Ownership
The constituting act is the foundational part of the document. It establishes the legal existence of the co-ownership and defines its essential parameters.
It includes the destination of the immovable, the description of private and common portions, the relative value of each fraction, and the method of contribution to common expenses.
This section defines the financial and structural balance of the co-ownership.

Building By-Laws
The building by-laws govern the daily life of co-owners. They establish rules of use, conduct, and internal administration.
For example, they may address noise regulations, balcony use, pet restrictions, and meeting procedures.
The purpose of the by-laws is to promote harmonious cohabitation and prevent disputes.
Description of the Fractions
The description of the fractions provides the technical and cadastral description of each unit.
It specifies the lot number, size, physical boundaries, and common portions for restricted use.
This section is essential during a real estate transaction.
What Must the Constituting Act Contain?
The constituting act is the core of the declaration. It establishes the legal existence of the co-ownership and defines its essential parameters. As noted by the Organisme d’autoréglementation du courtage immobilier du Québec (OACIQ), this section governs the destination of the immovable and the allocation of rights and obligations among co-owners.
Destination of the Immovable
The destination of the immovable defines its permitted use. It may be residential, commercial, or mixed-use.
This concept is central, as it influences how the by-laws are interpreted. For example, a high-end residential co-ownership may impose stricter restrictions.
All decisions must comply with the declared destination.
Definition of Common and Private Portions
The declaration clearly distinguishes private portions, such as apartments or private parking spaces, from common portions, including the roof, structure, hallways, and elevators.
Some common portions may be for restricted use, such as balconies or terraces.
This distinction directly impacts maintenance responsibilities and insurance coverage.
Relative Value and Share of Expenses
Each fraction is assigned a relative value. This determines the share of common expenses and voting weight at meetings.
Relative value is generally calculated based on size, location, or unit designation.
An error in this allocation may create significant financial imbalances.
Powers and Obligations of the Syndicate
The constituting act outlines the syndicate’s responsibilities, including maintaining common portions, managing the contingency fund, obtaining mandatory insurance, and enforcing the by-laws.
These obligations are essential to ensure the long-term sustainability of the property.
Building By-Laws: Rules and Governance
Use of Common Portions
The by-laws regulate the use of common areas to ensure safety and peace of mind.
They may limit storage in hallways or prohibit certain activities in shared spaces.
These rules must be reasonable and consistent with the destination of the immovable.
Restrictions (Pets, Rentals, Renovations)
Some declarations include restrictions regarding pets, short-term rentals, or major renovations.
However, these restrictions must comply with applicable laws and fundamental rights.
Meetings and Board Operations
The by-laws set out procedures for convening meetings, quorum requirements, and voting rules.
They also define the composition of the board of directors and the duration of mandates.
Clear by-laws promote effective governance.
Description of the Fractions
Technical Description of Units
The description of the fractions forms the technical foundation of the co-ownership. It describes each fraction, meaning each private unit, and the rights attached to it.
It includes the cadastral designation, building location, floor level, approximate area, and physical boundaries. This prevents ambiguity regarding the extent of ownership rights.
In many cases, architectural or cadastral plans are attached to the declaration. These documents then become legal references.
Imprecision in the description may lead to significant disputes, for example concerning responsibility for a shared wall, balcony, or storage space.
Cadastral Numbering
Each fraction has a distinct lot number registered at the Quebec Land Registry. This numbering allows each unit to be legally identified independently.
Unlike a civic address, the cadastral number is the official identifier recognized by the land registry system. It appears in deeds of sale, mortgages, and legal registrations.
The creation of separate lots is essential to the existence of divided co-ownership. Without cadastral subdivision, units could not be sold separately.
Consistency between the description and the cadastre is therefore crucial. Any error may delay a transaction or require notarial correction.

Importance During a Sale
During a real estate transaction, the buyer must carefully review the description of the fractions. This document confirms exactly what is included in the purchase.
For example, a parking space may be a separate private portion or a common portion for restricted use. The difference is significant legally and financially.
The description also allows verification of the relative value assigned to the fraction, which directly affects the share of common expenses and voting weight.
An informed buyer avoids unpleasant surprises after closing.
How to Amend a Declaration of Co-Ownership
Required Majorities
The required majority depends on the nature of the proposed amendment.
Some changes to the by-laws may be adopted by a qualified majority of co-owners present or represented at a meeting.
However, amendments affecting the destination of the immovable, the relative value of fractions, or fundamental co-owner rights may require a strengthened majority or even unanimity.
It is therefore essential to analyze the exact nature of the change before proceeding.
Misinterpreting majority rules may render the amendment invalid.
Role of the Notary
Any amendment to the constituting act or the description of the fractions must be executed as a notarial deed en minute.
The notary verifies the validity of the adopted decision, the required majorities, and the legal coherence of the amended text.
They also ensure compliance with applicable laws, including recent co-ownership reforms.
In complex situations, prior legal consultation is advisable before holding the meeting.
Publication at the Land Registry
An amendment to the declaration becomes enforceable against third parties only once it is published at the Land Registry.
This step is essential. Without publication, a buyer or mortgage creditor may not be bound by the amendment.
Publication ensures transparency and legal certainty in real estate transactions.
This is why the entire procedure must be completed properly.
Common Mistakes and Key Considerations
Outdated or Poorly Adapted Declaration
Many co-ownerships in Quebec still operate under declarations drafted before major legislative reforms in recent years.
These documents may not reflect new obligations related to contingency funds, insurance, or maintenance logs.
An outdated declaration may limit the syndicate’s ability to act effectively or create legal uncertainty.
Recent adjustments stem from legislative reforms. These changes directly impact building management and administrator liability. We explain these obligations in detail in our article on the obligations arising from Bill 16 in co-ownership.
A periodic audit of the declaration helps identify clauses that require modernization.

Inconsistencies Between Documents
Contradictions may arise between the constituting act, the by-laws, and the description of the fractions.
For example, one clause may prohibit short-term rentals while another appears to allow them under certain conditions.
These inconsistencies complicate rule enforcement and increase the risk of litigation.
A comprehensive review by a professional often helps harmonize the provisions.
Lack of Understanding Among Co-Owners
The declaration of co-ownership is a dense legal document. Many co-owners consult it only when a dispute arises.
This lack of awareness leads to avoidable tensions, particularly during renovations, rentals, or pet ownership decisions.
The syndicate benefits from clearly communicating key rules and reminding co-owners periodically.
Better understanding promotes proactive rather than reactive management.
Conclusion
The declaration of co-ownership in Quebec is the central document structuring life in a condominium.
It defines rights, obligations, and the financial management of the property. When properly drafted and updated, it supports sound administration and prevents disputes.
Before purchasing or modifying a unit, it is essential to review it carefully.
Frequently Asked Questions (FAQ)
Where Can I Obtain a Copy of the Declaration?
The syndicate must provide a copy upon request.
It can also be consulted at the Quebec Land Registry.
Is It Mandatory in Quebec?
Yes. Every divided co-ownership must be governed by a published declaration.
Without it, the co-ownership cannot legally exist.
Can a Clause Be Challenged?
Yes. In certain cases, an abusive or unlawful clause may be challenged before the courts.
Legal advice is recommended.