431 21e Avenue vs 456 21e Avenue
Data as of October 29, 2026 · updated every week
456 21e Avenue is the older building (2005); 431 21e Avenue was built in 2009. 456 21e Avenue is assessed at $707,500, 80% more than 431 21e Avenue ($392,500). 431 21e Avenue has 4 building permits on record, 456 21e Avenue has 0. Neither is in a flood zone.
| 431 21e Avenue | 456 21e Avenue | |
|---|---|---|
| Type | Condo building, 8 units | Condo building, 1 unit |
| City and borough | Montréal · Lachine | Montréal · Lachine |
| Built | 2009 | 2005 |
| Assessed (roll) | $392,500 | $707,500 |
| Since the previous roll | — | — |
| Welcome tax on that value | ≈ $3,998 | ≈ $9,499 |
| Lot | — | — |
| Floor area | 585 m² | 127 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 | 4 · Jul 2026 | 0 |
| Findings | 2 Check 3 Note | 2 Check 4 Note |
| Nearest metro | — | — |
The full report for each address explains every finding and shows the full permit and value history.