491 avenue Mountain vs 506 avenue Mountain
Data as of October 29, 2026 · updated every week
506 avenue Mountain is the older building (1910); 491 avenue Mountain was built in 1955. 491 avenue Mountain is assessed at $3,283,000, 226% more than 506 avenue Mountain ($1,008,300). Neither has a building permit on record. Neither is in a flood zone.
| 491 avenue Mountain | 506 avenue Mountain | |
|---|---|---|
| Type | House or building | House or building |
| City and borough | Westmount | Westmount |
| Built | 1955 | 1910 |
| Assessed (roll) | $3,283,000 | $1,008,300 |
| Since the previous roll | +11 % | +11 % |
| Welcome tax on that value | ≈ $47,356 | ≈ $13,235 |
| Lot | 767 m² | 155 m² |
| Floor area | 248 m² | 217 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 | 2 Note |
| Nearest metro | Atwater, 880 m | Atwater, 1.0 km |
The full report for each address explains every finding and shows the full permit and value history.
Full report: 491 avenue Mountain Full report: 506 avenue Mountain