18 avenue Thornhill vs 31 avenue Thornhill
Data as of October 29, 2026 · updated every week
31 avenue Thornhill is the older building (1922); 18 avenue Thornhill was built in 1923. 31 avenue Thornhill is assessed at $2,209,700, 10% more than 18 avenue Thornhill ($2,015,300). Neither has a building permit on record. Neither is in a flood zone.
| 18 avenue Thornhill | 31 avenue Thornhill | |
|---|---|---|
| Type | House or building | House or building |
| City and borough | Westmount | Westmount |
| Built | 1923 | 1922 |
| Assessed (roll) | $2,015,300 | $2,209,700 |
| Since the previous roll | +8 % | +8 % |
| Welcome tax on that value | ≈ $28,340 | ≈ $31,256 |
| Lot | 283 m² | 237 m² |
| Floor area | 177 m² | 191 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 | 1 Note |
| Nearest metro | Atwater, 980 m | Atwater, 1.0 km |
The full report for each address explains every finding and shows the full permit and value history.
Full report: 18 avenue Thornhill Full report: 31 avenue Thornhill