The half duplex is the form the inner city rebuilds itself in, and South Calgary is one of the grids where you can watch it happen. Two attached homes on a lot that carried one bungalow, usually three storeys with a developed basement, usually with a detached garage off the lane. The 2021 census recorded semi-detached at about a tenth of dwellings, and that figure predates much of the current wave — most of what trades on this page is new or close to it. several semi-detached homes are for sale.
Infill economics work here because the land does. South Calgary sits a walk from the Marda Loop high street, minutes from downtown and Mount Royal University, and on a grid of full-width lots that the City's R-CG rules allow to be redeveloped into paired homes. That combination is why builders keep buying originals on these streets. For a buyer, the appeal is straightforward: a brand-new home with modern insulation, wiring and mechanicals, in a location that would otherwise mean a hundred-year-old house and a renovation budget. Many of these builds are designed with a secondary suite in the basement, and a lot of them carry rooftop or third-floor space that a bungalow on the same lot never could. Because the wave is still running, the streetscape is arriving block by block rather than all at once.
Establish first what you are actually buying: two separately titled parcels sharing a party wall is a different arrangement from a bare-land or conventional condominium, and both get called a semi. Read the party wall agreement, and ask how the roof, the shared wall and any common drainage are handled. Ask which new home warranty the build carries and what is still in its coverage window. Builder quality varies widely across a wave this size — walk earlier projects, ask who framed and who did the mechanical, and get an independent inspection on a new home rather than assuming new means sound. Confirm what is included: landscaping, fencing and the garage are sometimes not. And if the listing mentions a suite, treat its legality as unverified until permits say otherwise.
Measured over September 2025 to August 2026 from MLS® data, on 29 semi-detached sales. Aggregates only, for a stated window; the listing counts elsewhere on this page are read live.
29 of the 131 South Calgary sales in the window were half duplexes. That is the redevelopment rate showing up in the sales record.
The detached median over the same window was $1,048,750, so a half duplex traded about 14% below it.
Detached ran 1,842 sq ft over the same window, so the half duplex is not automatically the smaller home.
Two homes sharing one wall. In Calgary a semi-detached home is usually freehold: each half sits on its own titled lot with no condominium corporation, which is the part buyers most often get wrong. Some are bare-land or conventional condominiums instead, with a fee and a board. The title and the listing’s ownership type settle it — two identical-looking halves on the same block can be held either way.
A single inner-city lot that can be redeveloped as two attached homes carries its land cost across two sales instead of one. That arithmetic is what has been rebuilding these streets, and it is why the newest housing in South Calgary is more likely to be attached than detached, and why a half duplex here is often the newer, larger and better-finished home on the block rather than the compromise.
Ask what the wall is built of and how far it goes: a wall that runs to the underside of the roof deck, with proper fire separation and no shared framing, is a different home to live in than one that stops at the ceiling. Sound transfer is the most common regret. Where the two halves are held freehold, check whether a party wall agreement is registered on title and what it says about maintenance, insurance and access for repairs.
Confirm the water, sewer and gas services are separate rather than shared through the neighbouring half, and find out who owns the fence, the walkway and the drainage between the two properties. On a new build, ask for the Alberta New Home Warranty documents and confirm what remains of the coverage — it runs from the date the home was first occupied, not from your possession date.
The streets buyers ask about most here are The blocks around the hilltop park, pool and rink, The park-side streets, The interior character grid, The northern blocks nearest 33rd Avenue and the Marda Loop shops and The eastern boundary blocks nearest 14 Street.
Nearby amenities include the hilltop community park with its outdoor pool, tennis courts and winter rink, the Marda Loop shops and restaurants on 33rd and 34th Avenue, the Marda Loop Safeway and River Park and the Elbow valley a few minutes west. Access is via 14 Street SW, Crowchild Trail and 33rd Avenue SW.
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Talk to a REALTOR® All South Calgary listingsListing counts on this page are read live from the MLS® feed each time it loads. Market figures cover August 2025 to July 2026. How we calculate these figures.