The largest brokerages in Thornhill

7 offices, 545 agents counted at the 2026-09-23 scan. CENTURY 21 Heritage Group Ltd. Brokerage leads with 224 agents — 41.1% 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%).

545
agents counted
7
competing offices
88.3%
held by the top three
11.7%
hold a broker title

The top 7 at a glance

Agents on the roster at the 2026-09-23 scan; percentages are share of all 545 tracked in Thornhill.

  1. CENTURY 21 Heritage Group Ltd. Brokerage 224 41.1%
  2. REMAX Realtron Realty Inc 216 39.6%
  3. REMAX West Realty Inc 41 7.5%
  4. REMAX Your Community Realty 29 5.3%
  5. REMAX YC Realty 24 4.4%
  6. Sutton Group - Admiral Realty Inc., Brokerage 10 1.8%
  7. Sutton Group - Incentive Realty Inc., Brokerage 1 0.2%

Bar length is relative to the largest row; percentages are share of all 545 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 21 224 41.1%
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 1.9%
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

RE/MAX 310 (56.9%) Century 21 224 (41.1%) Sutton 11 (2%)

Coverage: these are the 3 national networks we scrape — about 46.1% 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 →

Need the Thornhill roster itself?

Filter the agents behind these counts by office, role or producer tier and download the segment you need.

Build a Thornhill list →
Thornhill realtor contact data →