309 avenue Grosvenor vs 378 avenue Grosvenor
Data as of October 29, 2026 · updated every week
378 avenue Grosvenor is the older building (1902); 309 avenue Grosvenor was built in 1915. 309 avenue Grosvenor is assessed at $2,733,600, 10% more than 378 avenue Grosvenor ($2,477,800). Neither has a building permit on record. Neither is in a flood zone.
| 309 avenue Grosvenor | 378 avenue Grosvenor | |
|---|---|---|
| Type | 3 dwellings | House or building |
| City and borough | Westmount | Westmount |
| Built | 1915 | 1902 |
| Assessed (roll) | $2,733,600 | $2,477,800 |
| Since the previous roll | +2 % | +10 % |
| Welcome tax on that value | ≈ $39,115 | ≈ $35,278 |
| Lot | 376 m² | 390 m² |
| Floor area | 355 m² | 210 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, 600 m | Vendôme, 590 m |
The full report for each address explains every finding and shows the full permit and value history.
Full report: 309 avenue Grosvenor Full report: 378 avenue Grosvenor