Dwelling
558 Avenue Roslyn
Westmount, Quebec H3Y 2T8
- Assessed value
- $6,025,300
- 2026 roll
- Since the previous roll
- 0.0%
- From $6,025,300 in 2023
- Built
- 1907
Estimated value
$5,952,000 – $7,274,000
Estimated range, not an appraisal: the 2026 assessment, indexed by the MLS® HPI to Aug 2026.
Thinking of selling?
We connect you with a vetted local agent. It’s free, with no obligation.
Assessment
The 2026 roll, as of Aug 3, 2026. An assessment is the value the municipality taxes on, not a sale price.
- Assessed value
- $6,025,300
- Land
- $2,366,600
- Building
- $3,658,700
- Previous roll (2023)
- $6,025,300
- Change from the previous roll
- 0.0%
Show as a table
| Year | Assessed value | Land | Building |
|---|---|---|---|
| 2026 | $6,025,300 | $2,366,600 | $3,658,700 |
| 2023 | $6,025,300 | $2,264,500 | $3,760,800 |
| 2020 | $4,820,200 | $1,809,800 | $3,010,400 |
Listing
Ended May 1, 2026For sale
Asking price$9,950,000
- Type
- House
- Bedrooms
- 6
- Bathrooms
- 6
- Listed
- Apr 10, 2026
- Days on market
- 21
- MLS® number
- 24685348
Property facts
- Use
- Dwelling · CUBF 1000
- Land area
- 1,031 m² (11,100 sq ft)
- Built
- 1907
- Matricule
- 9638-30-9866-0-000-0000
Common questions
- What is 558 Avenue Roslyn worth?
- Between $5,952,000 and $7,274,000. Estimated range, not an appraisal: the 2026 assessment, indexed by the MLS® HPI to Aug 2026.
- What is the assessed value of 558 Avenue Roslyn?
- $6,025,300 on the 2026 roll, 0.0% from $6,025,300 in 2023. An assessment is the value the municipality taxes on, not a sale price.
- Is 558 Avenue Roslyn for sale?
- Princeps has no active listing for it. It was last listed on Apr 10, 2026 at $9,950,000.
- When was 558 Avenue Roslyn built?
- In 1907.
- How big is the lot at 558 Avenue Roslyn?
- 1,031 m² (11,100 sq ft).
Last updated Oct 8, 2026.