The Multiple Listing Service is the backbone of Canadian real estate. Understanding how it works — and its limitations — helps you make better decisions whether you are buying, selling, or investing.
How MLS works
The structure
| Level | Organization | Role |
|---|---|---|
| National | CREA (Canadian Real Estate Association) | Operates realtor.ca, owns MLS® trademark, sets national standards |
| Regional | Local real estate boards (TRREB, REBGV, CREB, etc.) | Operate local MLS systems, set local rules |
| Brokerage | Individual brokerages (Re/Max, Royal LePage, etc.) | Access MLS through board membership |
| Agent | Individual licensed agents | Input listings, search for clients, negotiate deals |
The listing process
- Seller signs a listing agreement with an agent
- Agent enters the property details into the local MLS system
- Listing is visible to all member agents within the board (and often shared across boards)
- Listing is syndicated to realtor.ca (public view)
- Buyer agents search MLS on behalf of their clients
- Showings, offers, and negotiations happen through the agents
- When the property sells, the sale data is recorded in MLS
Major real estate boards in Canada
| Board | Region | Abbreviation |
|---|---|---|
| Toronto Regional Real Estate Board | GTA and surrounding areas | TRREB |
| Real Estate Board of Greater Vancouver | Metro Vancouver | REBGV |
| Calgary Real Estate Board | Calgary and area | CREB |
| Ottawa Real Estate Board | Ottawa and area | OREB |
| Greater Montreal Real Estate Board | Montreal and area | APCIQ (CIGM) |
| Realtors Association of Edmonton | Edmonton and area | RAE |
| Winnipeg Regional Real Estate Board | Winnipeg and area | WRREB |
| Nova Scotia Association of REALTORS | Nova Scotia | NSAR |
Types of MLS listings
| Listing Type | Description | Who Sees It |
|---|---|---|
| Exclusive listing | Listed on MLS, marketed broadly | All agents and public (via realtor.ca) |
| Mere posting / flat-fee | Listed on MLS by flat-fee service, owner handles sale | All agents and public — but with limited agent involvement |
| Pocket listing / exclusive | Not on MLS — marketed privately by the listing agent | Only the listing agent’s network |
| Assignment sale | Pre-construction unit being sold before closing | Listed on MLS or marketed privately |
What MLS data includes
Public view (realtor.ca)
| Data | Available? |
|---|---|
| Listing price | ✅ |
| Property photos | ✅ |
| Property description | ✅ |
| Number of bedrooms / bathrooms | ✅ |
| Square footage (if provided) | ✅ |
| Property type and style | ✅ |
| Listing date | ✅ |
| Property tax amount | ✅ |
| DOM (Days on Market) | ✅ |
| Agent contact info | ✅ |
Agent-only view (full MLS)
| Data | Available? |
|---|---|
| Everything above | ✅ |
| Sold prices and sold dates | ✅ (most boards) |
| Agent remarks (private notes) | ✅ |
| Showing instructions | ✅ |
| Commission offered to buyer’s agent | ✅ |
| Property history (relist, price changes) | ✅ |
| CDOM (Cumulative Days on Market) | ✅ |
| Room dimensions (detailed) | ✅ |
| Legal description and PIN | ✅ |
Listing without an agent (flat-fee MLS)
How flat-fee MLS works
- You pay an upfront fee to a flat-fee service ($500–$2,000)
- They post your listing on MLS with your photos and description
- Your listing appears on realtor.ca and agent searches
- You handle all showings, open houses, and inquiries
- You negotiate directly with buyer agents or buyers
- You still offer a commission to the buyer’s agent (2%–2.5% is standard)
- You hire your own real estate lawyer for the paperwork
Flat-fee MLS pros and cons
| Pros | Cons |
|---|---|
| Save listing agent commission (2%–2.5%) | You handle all showings and inquiries |
| Full MLS exposure | No agent guidance on pricing, staging, or marketing |
| Control over the sale process | May get fewer showings (some agents avoid flat-fee listings) |
| Cost savings of $10,000–$25,000+ | No one negotiating on your behalf |
| Ideal for experienced sellers | Risk of underpricing or overpricing |
Cost comparison
| Service | Listing Commission | Buyer Agent Commission | Total on $700,000 Home |
|---|---|---|---|
| Full-service agent | 2.5% ($17,500) | 2.5% ($17,500) | $35,000 + HST |
| Discount agent | 1.0% ($7,000) | 2.5% ($17,500) | $24,500 + HST |
| Flat-fee MLS | $1,000 (flat) | 2.5% ($17,500) | $18,500 + HST |
| Private sale (no MLS) | $0 | $0 | $0 (but limited exposure) |
Data reciprocity: how boards share listings
Most Canadian real estate boards share data through data distribution agreements:
| Feature | Details |
|---|---|
| DDF (Data Distribution Facility) | CREA’s system that syndicates listings to realtor.ca and third-party websites |
| IDX (Internet Data Exchange) | Allows agents to display other agents’ listings on their own websites |
| Cross-board sharing | Some boards share listings — e.g., TRREB listings may appear in kitchener boards |
| National coverage | Not all boards participate in full data sharing — some regional gaps exist |
Sold data access by province
| Province | Public Access to Sold Prices | How to Access |
|---|---|---|
| Ontario | Yes (through Land Registry) | Teranet / OnLand portal (fee per search) or through your agent |
| British Columbia | Partial (BC Assessment shows assessed values; agents have sold data) | BC Assessment website or through agent |
| Alberta | Through agents | Ask your REALTOR® or search SPIN2 (title searches) |
| Quebec | Yes (through JLR / Registre foncier) | JLR portal or through your courtier (agent) |
| Manitoba | Through agents | Contact your REALTOR® |
| Saskatchewan | Through agents | Contact your REALTOR® |
| Atlantic provinces | Varies | Through agents or provincial property registries |
MLS® rules and regulations
| Rule | Details |
|---|---|
| MLS® is a trademark | Owned by CREA — only CREA members can use the MLS® trademark and system |
| Cooperation | Listing agents must offer to cooperate with buyer agents (this is a core MLS principle) |
| Accuracy | Listing agents are responsible for accuracy of property information |
| Commission disclosure | Commission offered to buyer agents is disclosed in the MLS system |
| Days on Market | Must be accurately reported — reset rules vary by board |
| Photo standards | Boards set minimum photo requirements and quality standards |
How MLS is evolving
| Trend | What Is Changing |
|---|---|
| Open data | Increasing pressure to make sold data publicly accessible |
| Commission transparency | New rules requiring clearer disclosure of commission structures |
| Technology | AI-powered search, virtual tours, 3D scans becoming standard |
| Competition | Flat-fee and discount services growing market share |
| Private listings | CREA considering rules about mandatory MLS listing vs pocket listings |
| US influence | NAR settlement ripple effects could influence Canadian commission practices |