4921 21A Street SW
4921 21A Street SW is a house in Altadore, Calgary, built in 1920 on a 5,995 sq ft lot. The City of Calgary assessed it at $868,000 for 2026, +36.5% over 3 years.
$868,000
2026 assessed value · about $5,770 a year in property tax
Change in assessed value
- 3 years+36.5%
- 5 years+60.9%
- 10 years+23.4%
- 20 years+198.8%
The change in the City's assessment of the same property, to 2026. Years before the building was finished or before a jump in its value are left out.
Compared with 1,267 detached houses in Altadore
In the lowest tenth of detached houses in Altadore. The typical one is assessed at $1.27M; this one is 32% lower.
Facts
- Kind of property
- House
- 2025 assessed value
- $806,500
- Year built
- 1920
- Lot size
- 5,995 sq ft
- Zoning
- R-C2,R-CG
- City use code
- R110
Think this value is wrong?
The City of Calgary mails assessment notices each January. During the review period that follows you can ask the City's assessors to look again, and by the deadline printed on your notice you can file a complaint with the Assessment Review Board. Values of similar homes nearby, like the ones above, are the usual starting point. Details are on calgary.ca under property assessment.
Building history
- 1920 · BuiltCity assessment records
- 2026 · Building demolishedBuilding permit
Years built from the City's assessment rolls (2020 on), and completed permits for new buildings and demolitions (1999 on). Where they disagree, both are shown.
Permits (6)
- GarageBuilding permit · Sep 2026 · est. $38,576 · in review · BP2026-18767
- New semi-detached house, basement development, fireplace, deckBuilding permit · Sep 2026 · est. $332,447 · 1 new home · in review · BP2026-18766
- GarageBuilding permit · Sep 2026 · est. $38,576 · in review · BP2026-18765
- New semi-detached house, fireplace, secondary suiteBuilding permit · Sep 2026 · est. $296,589 · 1 new home · in review · BP2026-18764
- Demolition (demolition)Building permit · Aug 2026 · completed · BP2026-16268
From the City of Calgary's open data, up to Oct 2026. The map lists every one. Costs are the applicant's estimate.
Along 21A Street SW
- 4918 21A Street SW$1.42M
- 4919 21A Street SW$1.13M
- 4920 21A Street SW$888K
- 4922 21A Street SW$831K
- 4924 21A Street SW$617K
- 4926 21A Street SW$637K
From the City of Calgary's open assessment data. An assessment is the City's estimate of market value on July 1, 2025, for property tax; it is not a sale price. The map also shows building permits, legal suites and homes for sale or rent.