521 rue Prince-Arthur Ouest vs 645 rue Prince-Arthur Ouest
Data as of November 1, 2026 · updated every week
521 rue Prince-Arthur Ouest is the older building (1875); 645 rue Prince-Arthur Ouest was built in 1885. 521 rue Prince-Arthur Ouest is assessed at $593,200, 37% more than 645 rue Prince-Arthur Ouest ($433,700). 521 rue Prince-Arthur Ouest has 2 building permits on record, 645 rue Prince-Arthur Ouest has 5. Neither is in a flood zone.
| 521 rue Prince-Arthur Ouest | 645 rue Prince-Arthur Ouest | |
|---|---|---|
| Type | Condo building, 3 units | Condo building, 8 units |
| City and borough | Montréal · Le Plateau-Mont-Royal | Montréal · Le Plateau-Mont-Royal |
| Built | ≈ 1875 | ≈ 1885 |
| Assessed (roll) | $593,200 | $433,700 |
| Since the previous roll | — | — |
| Welcome tax on that value | ≈ $7,213 | ≈ $4,616 |
| Lot | — | — |
| Floor area | 426 m² | 666 m² |
| Notice of deterioration | No | No |
| City’s right of first refusal | No | No |
| Heritage | Yes | Yes |
| In a flood zone | No | No |
| Building permits on record | 2 · Feb 2009 | 5 · May 2022 |
| Findings | 1 Serious 1 Check 5 Note | 2 Check 5 Note |
| Nearest metro | McGill, 680 m | McGill, 660 m |
The full report for each address explains every finding and shows the full permit and value history.
Full report: 521 rue Prince-Arthur Ouest Full report: 645 rue Prince-Arthur Ouest