100 21e Avenue vs 7-431 21e Avenue
Data as of October 29, 2026 · updated every week
100 21e Avenue is the older building (1930); 7-431 21e Avenue was built in 2009. 100 21e Avenue is assessed at $304,200 and 7-431 21e Avenue at $392,500; one is a whole condo building, so the values do not compare directly. 100 21e Avenue has 6 building permits on record, 7-431 21e Avenue has 4. Neither is in a flood zone.
| 100 21e Avenue | 7-431 21e Avenue | |
|---|---|---|
| Type | Condo building, 20 units | Condo unit |
| City and borough | Montréal · Lachine | Montréal · Lachine |
| Built | 1930 | 2009 |
| Assessed (roll) | $304,200 | $392,500 |
| Since the previous roll | — | +17 % |
| Welcome tax on that value | ≈ $2,728 | ≈ $3,998 |
| Lot | — | — |
| Floor area | 814 m² | 74 m² |
| Notice of deterioration | No | No |
| City’s right of first refusal | No | No |
| Heritage | Yes | No |
| In a flood zone | No | No |
| Building permits on record | 6 · Nov 2024 | 4 · Jul 2026 |
| Findings | 2 Check 4 Note | 2 Check 3 Note |
| Nearest metro | — | — |
The full report for each address explains every finding and shows the full permit and value history.