561 avenue Roslyn vs 577 avenue Roslyn
Data as of October 29, 2026 · updated every week
Both were built in 1910. 561 avenue Roslyn is assessed at $3,050,800, 18% more than 577 avenue Roslyn ($2,587,900). Neither has a building permit on record. Neither is in a flood zone.
| 561 avenue Roslyn | 577 avenue Roslyn | |
|---|---|---|
| Type | House or building | House or building |
| City and borough | Westmount | Westmount |
| Built | 1910 | 1910 |
| Assessed (roll) | $3,050,800 | $2,587,900 |
| Since the previous roll | 0 % | 0 % |
| Welcome tax on that value | ≈ $43,873 | ≈ $36,929 |
| Lot | 523 m² | 520 m² |
| Floor area | 338 m² | 236 m² |
| Notice of deterioration | No | No |
| City’s right of first refusal | No | No |
| Heritage | No | No |
| In a flood zone | No | No |
| Building permits on record | 0 | 0 |
| Findings | 1 Note | 1 Note |
| Nearest metro | Villa-Maria, 1.0 km | Villa-Maria, 1.0 km |
The full report for each address explains every finding and shows the full permit and value history.
Full report: 561 avenue Roslyn Full report: 577 avenue Roslyn