The largest brokerages in Thornhill
15 offices, 627 agents counted at the 2026-11-02 scan. Some agents here are counted as of an earlier read: realtor.ca, last read August 18, 2026. REMAX Realtron Realty Inc leads with 233 agents — 37.2% of the tracked roster, ahead of CENTURY 21 Heritage Group Ltd. Brokerage at 230. The local market is unusually concentrated — three offices hold most of it (top three hold 80.7%).
The top 10 at a glance
Agents on the roster at the 2026-11-02 scan; percentages are share of all 627 tracked in Thornhill.
- REMAX Realtron Realty Inc 233 37.2%
- CENTURY 21 Heritage Group Ltd. Brokerage 230 36.7%
- REMAX West Realty Inc 43 6.9%
- REMAX Your Community Realty 30 4.8%
- REMAX YC Realty 24 3.8%
- Forest Hill Real Estate Inc. 20 3.2%
- Sutton Group - Admiral Realty Inc., Brokerage 18 2.9%
- Homelife Frontier Realty Inc. 9 1.4%
- Homelife/Bayview Realty Inc. 9 1.4%
- One Percent Realty Ltd. 5 0.8%
Bar length is relative to the largest row; percentages are share of all 627 tracked agents. The 10 shown account for 99.0% of them — the remaining 6 sit with other offices. Download this chart as an image ↓
Every office we track in Thornhill
| # | Office | Network | Agents | Share |
|---|---|---|---|---|
| 1 | REMAX Realtron Realty Inc | RE/MAX | 233 | 37.2% |
| 2 | CENTURY 21 Heritage Group Ltd. Brokerage | Century 21 | 230 | 36.7% |
| 3 | REMAX West Realty Inc | RE/MAX | 43 | 6.8% |
| 4 | REMAX Your Community Realty | RE/MAX | 30 | 4.8% |
| 5 | REMAX YC Realty | RE/MAX | 24 | 3.8% |
| 6 | Forest Hill Real Estate Inc. | realtor.ca | 20 | 3.2% |
| 7 | Sutton Group - Admiral Realty Inc., Brokerage | Sutton | 18 | 2.9% |
| 8 | Homelife Frontier Realty Inc. | realtor.ca | 9 | 1.4% |
| 9 | Homelife/Bayview Realty Inc. | realtor.ca | 9 | 1.4% |
| 10 | One Percent Realty Ltd. | realtor.ca | 5 | 0.8% |
| 11 | Sutton Group-Admiral Realty Inc. | realtor.ca | 2 | 0.3% |
| 12 | Exit Realty Legacy | realtor.ca | 1 | 0.2% |
| 13 | Home Standards Brickstone Realty | realtor.ca | 1 | 0.2% |
| 14 | Proxy Real Property Inc. | realtor.ca | 1 | 0.2% |
| 15 | Sutton Group - Incentive Realty Inc., Brokerage | Sutton | 1 | 0.1% |
Offices with fewer than 10 agents appear in this table but don't get their own page. Across the 349 Thornhill agents whose sites we check, 114.6% list a website of their own (national 59.9%).
Network mix in Thornhill
Coverage: these are the 4 brokerage rosters we scrape (national networks and independents) — about 50.6% of Canadian REALTORS® nationally. Independents and brokerages outside those networks aren't counted, so read this as the largest offices among the networks we track in Thornhill. Methodology →
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