427 avenue Grosvenor vs 644 avenue Grosvenor
Data as of October 29, 2026 · updated every week
427 avenue Grosvenor is the older building (1900); 644 avenue Grosvenor was built in 1910. 644 avenue Grosvenor is assessed at $2,356,600, 57% more than 427 avenue Grosvenor ($1,500,000). Neither has a building permit on record. Neither is in a flood zone.
| 427 avenue Grosvenor | 644 avenue Grosvenor | |
|---|---|---|
| Type | House or building | House or building |
| City and borough | Westmount | Westmount |
| Built | ≈ 1900 | 1910 |
| Assessed (roll) | $1,500,000 | $2,356,600 |
| Since the previous roll | 0 % | +19 % |
| Welcome tax on that value | ≈ $20,611 | ≈ $33,460 |
| Lot | 199 m² | 387 m² |
| Floor area | 178 m² | 258 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 | Vendôme, 700 m | Villa-Maria, 750 m |
The full report for each address explains every finding and shows the full permit and value history.
Full report: 427 avenue Grosvenor Full report: 644 avenue Grosvenor