601 avenue Roslyn vs 639 avenue Roslyn
Data as of October 29, 2026 · updated every week
639 avenue Roslyn is the older building (1905); 601 avenue Roslyn was built in 1909. 639 avenue Roslyn is assessed at $3,000,000, 56% more than 601 avenue Roslyn ($1,921,900). Neither has a building permit on record. Neither is in a flood zone.
| 601 avenue Roslyn | 639 avenue Roslyn | |
|---|---|---|
| Type | House or building | House or building |
| City and borough | Westmount | Westmount |
| Built | 1909 | 1905 |
| Assessed (roll) | $1,921,900 | $3,000,000 |
| Since the previous roll | 0 % | 0 % |
| Welcome tax on that value | ≈ $26,939 | ≈ $43,111 |
| Lot | 309 m² | 516 m² |
| Floor area | 258 m² | 326 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 | 2 Note | 1 Note |
| Nearest metro | Villa-Maria, 960 m | Villa-Maria, 900 m |
The full report for each address explains every finding and shows the full permit and value history.
Full report: 601 avenue Roslyn Full report: 639 avenue Roslyn