avenue Thornhill, Westmount: property records by address

Data as of October 25, 2026 · updated every week

36 addresses on avenue Thornhill in Westmount, Montréal, built between 1873 and 1927. Open any address for its building permits, zoning, floodplain and heritage records.

The oldest building on avenue Thornhill dates from 1873; half were built before 1923, and the newest in 1927. Most houses and plexes are assessed between $1,723,800 and $2,627,100; the typical one at $1,941,200.