The largest brokerages in Summerside
4 offices, 78 agents counted at the 2026-08-07 scan. CENTURY 21 Northumberland Realty (1987) Ltd. leads with 35 agents — 44.9% of the tracked roster, ahead of REMAX Harbourside Realty Ltd at 22. The local market is unusually concentrated — three offices hold most of it (top three hold 94.9%).
Every office we track in Summerside
| # | Office | Network | Agents | Share |
|---|---|---|---|---|
| 1 | CENTURY 21 Northumberland Realty (1987) Ltd. | Century 21 | 35 | 44.9% |
| 2 | REMAX Harbourside Realty Ltd | RE/MAX | 22 | 28.2% |
| 3 | Royal LePage Country Estates | Royal LePage | 17 | 21.8% |
| 4 | Coldwell Banker Parker Realty | Coldwell Banker | 4 | 5.1% |
Offices with fewer than 10 agents appear in this table but don't get their own page.
Network mix in Summerside
Coverage: these are the 4 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 Summerside. Methodology →
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