4423 21 Avenue NW
4423 21 Avenue NW is a house in Montgomery, Calgary, built in 2017 on a 5,999 sq ft lot. The City of Calgary assessed it at $1,850,000 for 2026, +25.0% over 3 years.
$1,850,000
2026 assessed value · about $12,300 a year in property tax
Change in assessed value
- 3 years+25.0%
- 5 years+38.1%
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
In the top tenth of detached houses in Montgomery. The typical one is assessed at $683K; this one is 171% higher.
Similar homes nearby
- 2110 44 Street NW$571K
- 2222 44 Street NW$1.27M · built 2018
- 2107 Mackay Road NW$1.68M · built 2018
- 4511 21 Avenue NW$1.87M · built 2021
- 4512 21 Avenue NW$1.25M · built 2010
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 $1.27M; this one is 46% higher.
Facts
- Kind of property
- House
- 2025 assessed value
- $1,860,000
- Year built
- 2017
- Lot size
- 5,999 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.
Building history
- 2017 · House demolishedBuilding permit
- 2017 · House builtCity assessment records and building 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)
- Exterior renovations: power generation facility - small (rooftop solar panels)Development permit · Jun 2018 · approved · DP2018-2630
- GarageBuilding permit · Feb 2018 · est. $18,851 · completed · BP2017-15950
- New house, basement development, deck, porchBuilding permit · Jan 2018 · est. $562,741 · 1 new home · completed · BP2017-15949
- Demolition (demolition)Building permit · Dec 2017 · completed · BP2017-15794
- New: contextual single detached dwelling, accessory residential building (garage)Development permit · Nov 2017 · approved · DP2017-4336
From the City of Calgary's open data, up to Oct 2026. The map lists every one. 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.