The largest brokerages in Alliston
3 offices, 39 agents counted at the 2026-08-07 scan. REMAX Hallmark Chay Realty leads with 20 agents — 51.3% of the tracked roster, ahead of CENTURY 21 Heritage Group Ltd. Brokerage at 16. The local market is unusually concentrated — three offices hold most of it (top three hold 100%).
Every office we track in Alliston
| # | Office | Network | Agents | Share |
|---|---|---|---|---|
| 1 | REMAX Hallmark Chay Realty | RE/MAX | 20 | 51.3% |
| 2 | CENTURY 21 Heritage Group Ltd. Brokerage | Century 21 | 16 | 41% |
| 3 | Sutton Group - Incentive Realty Inc., Brokerage | Sutton | 3 | 7.7% |
Offices with fewer than 10 agents appear in this table but don't get their own page.
Network mix in Alliston
Coverage: these are the 3 national networks we scrape — about 44.4% 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 Alliston. Methodology →
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