4427 21 Avenue NW
4427 21 Avenue NW is a house in Montgomery, Calgary, built in 1952 on a 6,000 sq ft lot. The City of Calgary assessed it at $834,000 for 2026, +28.1% over 3 years.
$834,000
2026 assessed value · about $5,550 a year in property tax
Change in assessed value
- 3 years+28.1%
- 5 years+43.4%
- 10 years+56.8%
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 823 detached houses in Montgomery
Valued above about 75% of detached houses in Montgomery. The typical one is assessed at $683K; this one is 22% higher.
Similar homes nearby
- 4419 21 Avenue NW$605K · built 1952
- 4435 21 Avenue NW$556K · built 1951
- 4415 21 Avenue NW$578K · built 1952
- 4439 21 Avenue NW$600K · built 1952
- 4436 20 Avenue NW$578K · built 1952
The closest homes of the same kind, built within 8 years of this one and on a lot within 30% of its size. Their middle value is $578K; this one is 44% higher.
Facts
- Kind of property
- House
- 2025 assessed value
- $832,000
- Year built
- 1952
- Lot size
- 6,000 sq ft
- Zoning
- R-C1,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.
Permits (5)
- Relaxation: accessory residential building (existing garage) - building setback from rear property line, driveway lengthDevelopment permit · Mar 2014 · approved · DP2014-0798
- Addition, PorchBuilding permit · Jun 2012 · est. $80,255 · completed · BP2012-06011
- GarageBuilding permit · Apr 2012 · est. $19,251 · completed · BP2012-04207
- Addition: single detached dwelling (main floor on nw and sw sides)Development permit · Apr 2012 · approved · DP2012-0605
- Relaxation: accessory residential building (existing) - building setback from side property line and separation distance from main residential buildingDevelopment permit · Dec 2011 · approved · DP2011-4558
From the City of Calgary's open data, up to Oct 2026. Costs are the applicant's estimate.
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.