Point access blocks, which are also known as single-stair buildings, are getting a lot more attention here in Canada. And B.C. looks like it might be one of the first provinces to relax its building code. Here's an excerpt from a recent Globe and Mail article:

Canada’s building code, which provinces have generally gone along with, has required two staircases per apartment building since 1941. But B.C.’s Ministry of Housing last week published a research report outlining the optimal conditions for single staircases.

“We are definitely moving forward with this,” said Ravi Kahlon, the Housing Minister, who hopes to introduce the legislation allowing the change in the fall.

Mr. Kahlon said that the option of “single-egress” buildings, as they’re also called, will be confined to areas where there is professional fire services (as opposed to rural-style volunteer departments) and good water supply, as is the case in Seattle. That city has allowed single-stair buildings since 1974.

In this case, the proposed change is expected to be limited to six storey buildings that have no more than four apartments per floor. That still feels fairly limiting, but it's at least a step in the right direction.

I have been spending some time looking at the feasibility of small six-storey apartments (here in Toronto), and I can tell you that it's not easy to make the math work. You need to optimize, everything. Minor assumption changes can really blow up the model.

I don't think that this change will magically fix that. But it's still meaningful progress. And if we keep chipping away at this housing problem, we might actually get there.

We have spoken before about buildings, such as this 6-storey one in Paris, that were allowed to be built with only a single exit stair. This is noteworthy because, here in Canada, if you were to try and build an equivalent 6-storey building on an equivalent 100 square meter site, you would be required to have two exit stairs. And that would create more non-leasable space and make it even more challenging to develop such a small building.

It is for this reason that single-stair buildings have been getting an increasing amount of attention as of late. They are seen as a way of encouraging more missing middle housing.

So where are single-stair buildings currently allowed? Below is a map from Seattle-based Larch Lab showing the maximum number of storeys for point access blocks (what they call single-stair buildings) around the world. Based on this, Canada is one of the most conservative countries on the planet when it comes to required exiting (I don't want to speak for any of the grayed-out countries). It also shows that much of the world allows 6 or more storeys.

Point access blocks, which are also known as single-stair buildings, are getting a lot more attention here in Canada. And B.C. looks like it might be one of the first provinces to relax its building code. Here's an excerpt from a recent Globe and Mail article:

Canada’s building code, which provinces have generally gone along with, has required two staircases per apartment building since 1941. But B.C.’s Ministry of Housing last week published a research report outlining the optimal conditions for single staircases.

“We are definitely moving forward with this,” said Ravi Kahlon, the Housing Minister, who hopes to introduce the legislation allowing the change in the fall.

Mr. Kahlon said that the option of “single-egress” buildings, as they’re also called, will be confined to areas where there is professional fire services (as opposed to rural-style volunteer departments) and good water supply, as is the case in Seattle. That city has allowed single-stair buildings since 1974.

In this case, the proposed change is expected to be limited to six storey buildings that have no more than four apartments per floor. That still feels fairly limiting, but it's at least a step in the right direction.

I have been spending some time looking at the feasibility of small six-storey apartments (here in Toronto), and I can tell you that it's not easy to make the math work. You need to optimize, everything. Minor assumption changes can really blow up the model.

I don't think that this change will magically fix that. But it's still meaningful progress. And if we keep chipping away at this housing problem, we might actually get there.

We have spoken before about buildings, such as this 6-storey one in Paris, that were allowed to be built with only a single exit stair. This is noteworthy because, here in Canada, if you were to try and build an equivalent 6-storey building on an equivalent 100 square meter site, you would be required to have two exit stairs. And that would create more non-leasable space and make it even more challenging to develop such a small building.

It is for this reason that single-stair buildings have been getting an increasing amount of attention as of late. They are seen as a way of encouraging more missing middle housing.

So where are single-stair buildings currently allowed? Below is a map from Seattle-based Larch Lab showing the maximum number of storeys for point access blocks (what they call single-stair buildings) around the world. Based on this, Canada is one of the most conservative countries on the planet when it comes to required exiting (I don't want to speak for any of the grayed-out countries). It also shows that much of the world allows 6 or more storeys.