Calgary Secondary Suites Are Now a Permitted Use: What It Means for Legalizing Yours

Do you still need a development permit to legalize a secondary suite in Calgary?

Not anymore, for most homes. As of August 4, 2026, the City reclassified secondary suites in low-density zones as a "permitted use," meaning most skip the development permit step entirely and go straight to a building permit.

If you've ever looked into legalizing a suite and backed away because the process sounded like a maze of forms, a public notice period, and a wait that could stretch for months, I get it. That's usually the real thing holding people back, not the suite itself. Most homeowners I talk to aren't worried about the work. They're worried about dealing with the City. This change takes a real bite out of that worry.

What actually changed

Before August 4, most secondary suites, the basement or attached kind, needed a development permit before anything else. That meant a site-level review, a public notice period, and up to a 21-day window for a neighbour to appeal. Only after all of that cleared could you move on to the building permit, the part that actually deals with things like egress windows, fire separation, and ceiling height.

Council's decision to repeal the citywide rezoning bylaw, which took effect August 4, 2026, kept secondary suites classified as a permitted use across low-density districts city-wide. In practice, that means a qualifying suite can skip the development permit and go directly to a building permit application through the City's ePermit system. The City estimates this saves up to six weeks of processing time and more than $600 in permit fees per suite, and expects it to support roughly 2,300 new secondary suites a year going forward.

Backyard suites didn't get the same treatment. Those remain a discretionary use in most zones (permitted only in the R-G district), so they still need a full development permit and site review. If you're weighing a backyard suite against a basement suite, I wrote about that trade-off, and the fact that most properties can now only have one or the other, in Backyard Suite or Basement Suite in Calgary? You Can No Longer Have Both

Who this actually helps

Homeowners with an illegal suite. If you've been putting off legalizing an existing suite because the process felt like too much, this is the moment to look again. Skipping the development permit stage removes the part that used to take the longest and felt the most out of your hands. It doesn't replace the City's Secondary Suite Amnesty Program, which waives roughly $700 in fees for suites built before March 2018 and runs through December 31, 2026; I covered that one separately in Calgary's Secondary Suite Amnesty Is Ending. The two work together: the amnesty can waive the fee, and the permitted-use change can shorten the process. Worth checking both.

Buyers looking at a home with an existing suite. A faster, cheaper path to legal status makes an unregistered suite a smaller risk than it used to be, assuming the suite itself meets code. It's still worth confirming a suite's legal status before you write an offer, which I get into in Illegal Secondary Suites in Calgary: What Buyers Need to Know.

Investors. Fewer weeks in the permit queue means less carrying cost and a faster path to renting out the second unit. For a suite you're planning to build or finish, this is one more thing that makes the math work sooner rather than later.

The fine print

"Permitted use" isn't automatic for every property. A suite still needs to meet the Land Use Bylaw requirements for its district without needing a relaxation, things like a variance for setbacks or suite size. If yours needs one, it likely still goes through the development permit process. Exterior work tied to the suite, a new stairwell, a parking pad, that kind of thing, can also trigger a Real Property Report update, which matters if you sell down the road. And if you already had an application in before the rules changed, it's being processed under the old rules, not these.

None of this changes whether a suite needs to meet building and fire code. It changes how the City reviews it along the way.

Quick questions people ask me

Does this apply to backyard suites too?

No. Backyard suites stayed discretionary in most zones and still need a full development permit and site review.

Do I still need a building permit?

Yes. Skipping the development permit doesn't skip the building permit, that's still required and is where the City checks code items like egress and fire separation.

Can I still get the suite legalized for free under the amnesty?

The amnesty waives certain fees for suites built before March 2018, through December 31, 2026. It's separate from this change but can be used alongside it.

What if my suite needs a variance?

Then it likely still needs a development permit. Permitted-use status only applies when the suite meets the bylaw outright.

Does this affect what I can count as rental income for my mortgage?

No, that's a lender rule, not a City one. I broke that down separately in How Your Legal Suite's Rent Counts Toward a Calgary Mortgage

If you're sitting on a suite you've been meaning to legalize, or looking at a home with one that isn't registered yet, it's worth a conversation to see where you actually stand under the new process.

This post is for general education and isn't legal, financial, or professional advice. Secondary suite rules, fees, and programs change, confirm current requirements with the City of Calgary or a qualified professional before making a decision based on this information.