521 17e Avenue vs 678-680 17e Avenue
Data as of October 29, 2026 · updated every week
521 17e Avenue is the older building (1910); 678-680 17e Avenue was built in 1951. 678-680 17e Avenue is assessed at $722,300, 24% more than 521 17e Avenue ($581,300). 521 17e Avenue has 5 building permits on record, 678-680 17e Avenue has 0. Neither is in a flood zone.
| 521 17e Avenue | 678-680 17e Avenue | |
|---|---|---|
| Type | House or building | 2 dwellings |
| City and borough | Montréal · Lachine | Montréal · Lachine |
| Built | 1910 | 1951 |
| Assessed (roll) | $581,300 | $722,300 |
| Since the previous roll | +19 % | +19 % |
| Welcome tax on that value | ≈ $6,975 | ≈ $9,795 |
| Lot | 220 m² | 399 m² |
| Floor area | 144 m² | 221 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 | 5 · May 2019 | 0 |
| Findings | 2 Check 4 Note | 4 Note |
| Nearest metro | — | — |
The full report for each address explains every finding and shows the full permit and value history.