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4921 21A Street SW
Altadore Calgary T2T 5C2

$1,499,999
Residential beds: 6 baths: 5.0 2,647 sq. ft. built: 2026

Main Photo: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 1: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 2: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 3: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 4: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 5: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 6: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 7: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 8: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 9: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 10: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 11: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 12: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 13: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 14: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 15: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 16: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 17: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 18: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 19: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 20: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 21: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 22: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 23: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 24: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 25: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Photo 26: 4921 21A Street SW in Calgary: Altadore Semi Detached (Half Duplex) for sale : MLS®# A2343646
Status:
Active
Prop. Type:
Residential
MLS® Num:
A2343646
Bedrooms:
6
Bathrooms:
5
Year Built:
2026
This exceptional 3 STOREY LUXURY DUPLEX offers a rare opportunity to own a thoughtfully designed inner city home with impressive square footage, elevated functionality, and incredible flexibility in the heart of ALTADORE. Offering OVER 2,600 SQ FT ABOVE GRADE, a THIRD FLOOR RETREAT with DUAL BALCONIES, TWO PRIMARY BEDROOMS, multiple outdoor spaces, and FINISHED BASEMENT (with option to upgrade basement layout), this home is designed for modern family living, entertaining, and multi-generational flexibility. The main floor features a bright OPEN CONCEPT layout connecting the kitchen, dining, and living areas, creating an effortless flow for everyday living and entertaining. The kitchen sits at the heart of the home, while the spacious rear living area opens through large patio doors to the deck and backyard. A convenient POCKET OFFICE is thoughtfully planned to complete the main level. Upstairs, the second floor offers a spacious PRIMARY RETREAT with a PRIVATE ENSUITE and WALK-IN CLOSET. An additional 2 bedrooms, full bathroom, dedicated LAUNDRY complete this level. The THIRD FLOOR is a true standout, offering approximately 683 SQ FT of additional above-grade living space and incredible lifestyle flexibility. Designed for function a SECOND PRIMARY BEDROOM can become a retreat, entertainment lounge, executive workspace, or private getaway. BONUS/REC AREA provides a flexible space for family, guests, a second home office, or additional lounge. Large BI-PARTING DOORS open onto a FRONT AND REAR private DURADECK BALCONY, creating a seamless connection between indoor and outdoor living. The lower level features approximately 935 SQ FT, a SIDE ENTRANCE with two different floor plans you may choose from, providing versatility for usage. A DOUBLE DETACHED GARAGE, private yard, rear deck, and multiple outdoor spaces complete this property. Located in ALTADORE, one of Calgary's most desirable inner city communities, enjoy an established neighbourhood setting with convenient access to parks, pathways, schools, local shops, restaurants, Marda Loop, downtown, and major routes throughout the city. With OVER 3,500 SQ FT OF DEVELOPED LIVING SPACE including the basement , three above-grade levels, a THIRD FLOOR RETREAT, FLEXIBLE BASEMENT LAYOUT, and DOUBLE DETACHED GARAGE, this is a rare opportunity to own a distinctive luxury home in one of Calgary's premier communities. Call today to discuss presale options, including custom basement changes. Please note potential to suite is subject to approval and permitting by the city/municipality.
Property Type:
Residential
Property Sub Type:
Semi Detached (Half Duplex)
Condo Type:
Not a Condo
Transaction Type:
For Sale
Possession:
Possession Date:
Suite:
No
Num Legal Suites:
0
Num Illegal Suites:
0
Home Style:
3 (or more) Storey, Attached-Side by Side
Total Living Area:
2,646.58 sq. ft.
Main Level Finished Area:
934.5 sq. ft.
Upper Level Finished Area:
1,712.08 sq. ft.
Lower Level Finished Area:
Above Grade Finished Area:
Below Grade Finished Area:
777 sq. ft.
Taxes:
Tax Assessed Value:
HOA Fee Includes:
Lot Area:
3,000 sq. ft.
Lot Frontage:
25'
Acres Cleared:
Acres Cultivated:
Acres Irrigated:
Acres Leasehold:
Acres Not Cultivated:
Acres Freehold:
Acres Seeded:
Acres Tame Hay:
Acres Treed:
Acres Waste:
Acres Water Rights:
Front Exposure:
West
Reg. Size:
Reg. Size Includes:
Entry Level:
1
Levels:
Three Or More
End Unit:
1 Common Wall
Total Rooms Above Grade:
9
Year built:
2026 (Age: 0)
Bedrooms:
6 (Above Grd: 4)
Bedrooms Above Grade:
4
Bedrooms On Main:
0
Bedrooms Below Grade:
2
Bathrooms:
5.0 (Full:4, Half:1)
Num Ensuite Baths:
2
Plan:
1952AD
Heating:
Forced Air, Natural Gas
Basement:
Full, Finished, Separate/Exterior Entry
Foundation:
Poured Concrete
New Constr.:
Yes
Construction Material:
Brick, Stucco
Structure Type:
Duplex
Roof:
Flat Torch Membrane, Asphalt Shingle
Ensuite:
Yes
Flooring:
Hardwood, Tile, Vinyl Plank
Cooling:
Rough-In
Fireplaces:
1
Fireplace Details:
Gas
Garage:
Yes
Garage Spaces:
2
Parking:
Double Garage Detached
Parking Places:
2
Parking Total/Covered:
2 / -
Laundry Features:
In Basement
Southwest
Altadore
Garage Control(s), Oven-Built-In, Range, Range Hood, Refrigerator, Washer/Dryer
Appliances
None Known
Floor
Type
Size
Other
Main Floor
Living Room
15' × 14'4"
Main Floor
Kitchen
18'2" × 16'1"
Main Floor
Dining Room
11' × 10'6"
Main Floor
Office
6'11" × 6'8"
Main Floor
Mud Room
6'6" × 4'11"
2nd Floor
Bedroom - Primary
13'6" × 12'10"
2nd Floor
Bedroom
11'6" × 10'
2nd Floor
Bedroom
11'6" × 10'
2nd Floor
Laundry
10' × 5'6"
3rd Floor
Bedroom - Primary
13'4" × 12'6"
3rd Floor
Walk-In Closet
11'5" × 6'4"
3rd Floor
Bonus Room
20'1" × 12'3"
Basement
Bedroom
10'1" × 10'
Basement
Bedroom
12'10" × 10'1"
Basement
Kitchen
11'1" × 8'
Basement
Living Room
12'10" × 10'5"
Basement
Laundry
6'1" × 4'
Floor
Ensuite
Pieces
Other
Main Floor
No
2
0' x 0'
2nd Floor
No
4
0' x 0'
2nd Floor
Yes
5
0' x 0'
3rd Floor
Yes
3
0' x 0'
Basement
No
4
0' x 0'
Title to Land:
Fee Simple
Community Features:
Fishing, Park, Playground, Schools Nearby, Shopping Nearby, Sidewalks, Street Lights, Tennis Court(s), Walking/Bike Paths
Interior Features:
Built-in Features, Closet Organizers, High Ceilings, Kitchen Island, Natural Woodwork, No Animal Home, No Smoking Home, Open Floorplan, Pantry, Quartz Counters, Recessed Lighting, Separate Entrance, Storage, Sump Pump(s), Walk-In Closet(s), Wired for Data, Wired for Sound
Exterior Features:
Balcony, BBQ gas line, Lighting, Private Yard
Patio And Porch Features:
Deck, Front Porch
Lot Features:
Back Lane, Back Yard, Front Yard, Interior Lot, Landscaped, Lawn, Low Maintenance Landscape, Private, Subdivided
Num. of Parcels:
0
Fencing:
Fenced
Region:
Calgary
Zone:
CAL Zone CC
Zoning:
RCG
Listed Date:
Sep 14, 2026
Days on Mkt:
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Listed by RE/MAX House of Real Estate
Data was last updated September 15, 2026 at 06:05 AM (UTC)
Area Statistics
Listings on market:
45
Avg list price:
$1,329,000
Min list price:
$189,900
Max list price:
$3,295,000
Avg days on market:
35
Min days on market:
3
Max days on market:
252
Avg price per sq.ft.:
$591.74
These statistics are generated based on the current listing's property type and located in Altadore. Average values are derived using median calculations. This data is not produced by the MLS® system.
Data is supplied by Pillar 9™ MLS® System. Pillar 9™ is the owner of the copyright in its MLS®System. Data is deemed reliable but is not guaranteed accurate by Pillar 9™.
The trademarks MLS®, Multiple Listing Service® and the associated logos are owned by The Canadian Real Estate Association (CREA) and identify the quality of services provided by real estate professionals who are members of CREA. Used under license.