The largest brokerages in Thornhill
7 offices, 546 agents counted at the 2026-09-27 scan. CENTURY 21 Heritage Group Ltd. Brokerage leads with 225 agents — 41.2% of the tracked roster, ahead of REMAX Realtron Realty Inc at 216. The local market is unusually concentrated — three offices hold most of it (top three hold 88.3%).
The top 7 at a glance
Agents on the roster at the 2026-09-27 scan; percentages are share of all 546 tracked in Thornhill.
- CENTURY 21 Heritage Group Ltd. Brokerage 225 41.2%
- REMAX Realtron Realty Inc 216 39.6%
- REMAX West Realty Inc 41 7.5%
- REMAX Your Community Realty 29 5.3%
- REMAX YC Realty 24 4.4%
- Sutton Group - Admiral Realty Inc., Brokerage 10 1.8%
- Sutton Group - Incentive Realty Inc., Brokerage 1 0.2%
Bar length is relative to the largest row; percentages are share of all 546 tracked agents. Download this chart as an image ↓
Every office we track in Thornhill
| # | Office | Network | Agents | Share |
|---|---|---|---|---|
| 1 | CENTURY 21 Heritage Group Ltd. Brokerage | Century 21 | 225 | 41.2% |
| 2 | REMAX Realtron Realty Inc | RE/MAX | 216 | 39.6% |
| 3 | REMAX West Realty Inc | RE/MAX | 41 | 7.5% |
| 4 | REMAX Your Community Realty | RE/MAX | 29 | 5.3% |
| 5 | REMAX YC Realty | RE/MAX | 24 | 4.4% |
| 6 | Sutton Group - Admiral Realty Inc., Brokerage | Sutton | 10 | 1.8% |
| 7 | Sutton Group - Incentive Realty Inc., Brokerage | Sutton | 1 | 0.2% |
Offices with fewer than 10 agents appear in this table but don't get their own page. Across the 321 Thornhill agents whose sites we check, 104% list a website of their own (national 59%).
Network mix in Thornhill
Coverage: these are the 3 national networks we scrape — about 46.2% 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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