420 21e Avenue vs 6-427 21e Avenue
Data as of October 29, 2026 · updated every week
420 21e Avenue is the older building (2005); 6-427 21e Avenue was built in 2009. 420 21e Avenue is assessed at $745,700 and 6-427 21e Avenue at $392,500; one is a whole condo building, so the values do not compare directly. 420 21e Avenue has 0 building permits on record, 6-427 21e Avenue has 2. Neither is in a flood zone.
| 420 21e Avenue | 6-427 21e Avenue | |
|---|---|---|
| Type | Condo building, 1 unit | Condo unit |
| City and borough | Montréal · Lachine | Montréal · Lachine |
| Built | 2005 | 2009 |
| Assessed (roll) | $745,700 | $392,500 |
| Since the previous roll | — | +17 % |
| Welcome tax on that value | ≈ $10,263 | ≈ $3,998 |
| Lot | — | — |
| Floor area | 141 m² | 74 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 | 2 · Jul 2026 |
| Findings | 1 Check 5 Note | 2 Check 3 Note |
| Nearest metro | — | — |
The full report for each address explains every finding and shows the full permit and value history.