Rules last reviewed August 31, 2026
Calgary carriage houses, decoded.
A plain-language, Calgary-first resource on backyard suites — what the City's current rules allow, how the permit process works, what actually drives the cost of a build, and how to screen a lot before you spend anything.
Published by REPYYC × REAL Broker — 490+ reviews, 2,500+ clients served since 2020.
Screen your lot
Answer a few questions about width, zone, lane and existing suites to see whether your property clears the City's published baselines.
Run the screeningRead the current rules
What changed with the rezoning repeal effective August 4, 2026, and the dimensional baselines the City publishes.
Calgary rulesCity incentive program
The City's Backyard Suite Incentive Program — what was announced, and how to verify current availability.
Incentive detailsFind a property
Looking to buy a Calgary home that already has a carriage house, or a lot that could take one?
Explore homes with carriage housesScreening baselines
The numbers the City publishes
These are the baselines used to screen a Calgary lot. They tell you whether a conversation with the City is worth having — they do not tell you a suite is approved.
Minimum lot width
9 m
9 metres is the common minimum lot width. A width of 7.5 m can apply on certain corner or lane properties with three or more motor-vehicle stalls. Confirm your parcel with the City.
Rear setback
1.5 m
Minimum distance from the rear property line.
Side setback
1.2 m
Minimum distance from the side property line, subject to exceptions.
Separation from main dwelling
5.0 m
Minimum separation between the backyard suite and the main house.
Maximum height
7.5 m
Maximum building height for the backyard suite.
Outdoor amenity area
7.5 m² minimum
Minimum outdoor amenity area, with no side of that area less than 1.5 m.
Maximum suite area
Commonly 75 m²
The commonly applied maximum floor area for the suite itself.
Application review timeline
60 days
The City page states a 60-day review timeline. Timelines depend on application completeness and current volumes.
What changed on August 4, 2026
- Since August 4, 2026, a property may have one of a secondary suite or a backyard suite — not both.
- Backyard suites are not allowed on semi-detached properties.
- The parking requirement returned.
- Backyard suites are permitted in R-G. In other zones they are discretionary and require City verification.
Screening only — not an approval. This is a screening tool, not an approval. Nothing on this page confirms that a backyard suite can be built on a specific property — only the City of Calgary can do that through the development and building permit process.
Facts on this page are drawn from current City of Calgary pages and were last reviewed August 31, 2026. Rules change and every parcel is different. Verify current requirements with the City of Calgary before making any decision.
Thinking about buying, building or selling a carriage house?
REPYYC × REAL Broker works with Calgary buyers and homeowners on suite-capable properties every week. Ask a question and get a straight answer from a real person.