330 avenue Roslyn vs 510 avenue Roslyn
Data as of October 29, 2026 · updated every week
330 avenue Roslyn is the older building (1909); 510 avenue Roslyn was built in 1910. 510 avenue Roslyn is assessed at $3,434,900, 36% more than 330 avenue Roslyn ($2,519,100). Neither has a building permit on record. Neither is in a flood zone.
| 330 avenue Roslyn | 510 avenue Roslyn | |
|---|---|---|
| Type | House or building | House or building |
| City and borough | Westmount | Westmount |
| Built | 1909 | 1910 |
| Assessed (roll) | $2,519,100 | $3,434,900 |
| Since the previous roll | +10 % | 0 % |
| Welcome tax on that value | ≈ $35,897 | ≈ $49,634 |
| Lot | 387 m² | 567 m² |
| Floor area | 322 m² | 351 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 | 2 Note |
| Nearest metro | Vendôme, 650 m | Vendôme, 860 m |
The full report for each address explains every finding and shows the full permit and value history.
Full report: 330 avenue Roslyn Full report: 510 avenue Roslyn