Point access blocks (or single-stair buildings) are now an important part of today's discussions around housing supply in Canada. They are seen as a way to encourage more and different types of housing -- something we have been talking about on this blog for years. Here and here are two recent posts.
This week, I discovered the work of Conrad Speckert, who works at LGA Architectural Partners and has become a leading voice for this movement. Conrad completed his M.Arch at McGill University and, as part of his thesis project, he developed this website called Second Egress.
Since then it has grown to become a major resource for point access blocks. But most importantly, it has evolved into a catalyst for change. On April 18, 2022, he and David Hine (of David Hine Engineering) submitted
Point access blocks (or single-stair buildings) are now an important part of today's discussions around housing supply in Canada. They are seen as a way to encourage more and different types of housing -- something we have been talking about on this blog for years. Here and here are two recent posts.
This week, I discovered the work of Conrad Speckert, who works at LGA Architectural Partners and has become a leading voice for this movement. Conrad completed his M.Arch at McGill University and, as part of his thesis project, he developed this website called Second Egress.
Since then it has grown to become a major resource for point access blocks. But most importantly, it has evolved into a catalyst for change. On April 18, 2022, he and David Hine (of David Hine Engineering) submitted
this code change request
to the Canadian Commission on Building and Fire Codes.
The ask: Allow a single means of egress for multi-unit residential buildings up to 6 storeys. (The current maximum is 2 storeys.) Well done, Conrad and David. This is a massively important request with far-reaching benefits, and so I would encourage all of you to check out his website and spread the word.
P.S. My second favorite part of his site is a section called Manual of Illegal Floor Plans. It's a catalog of highly livable single-stair buildings from around the world; all of which would be currently illegal to build in Canada.
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.
this code change request
to the Canadian Commission on Building and Fire Codes.
The ask: Allow a single means of egress for multi-unit residential buildings up to 6 storeys. (The current maximum is 2 storeys.) Well done, Conrad and David. This is a massively important request with far-reaching benefits, and so I would encourage all of you to check out his website and spread the word.
P.S. My second favorite part of his site is a section called Manual of Illegal Floor Plans. It's a catalog of highly livable single-stair buildings from around the world; all of which would be currently illegal to build in Canada.
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.
Larch Lab is a major advocate for point access blocks and they have this policy brief outlining the problem and the opportunities. One of their most interesting statistics has to do with minimum project size inflation. As recent as 2000, only about 13% of all multifamily completions in the US had more than 50 units. Today, this number has jumped to more than 55% of all new multifamily buildings, meaning we are quickly losing our ability to build small and intimate.
Point access blocks can help with this.
Of course, the reason we have exiting requirements in our building codes is because of life safety. But there's research to suggest that this level of redundancy may not be needed in certain buildings. According to the above policy brief, the average death rate (caused by a building) in point access block countries like Switzerland, France, Italy and Germany, is significantly lower than that of the US. On top of this, almost no countries in the EU require buildings less than 28m tall to be sprinklered. The US does.
All of this said, I don't think that single-stair buildings are a silver bullet for missing middle housing. It is just one important ingredient in a complicated recipe. And as evidence of this, we can look to Seattle. The 2018 Seattle Building Code allows point access blocks up to 6 storeys, which is a rare occurrence in the US. However, the city appears to be still working on missing middle reform. Presumably other ingredients are still -- missing.
Larch Lab is a major advocate for point access blocks and they have this policy brief outlining the problem and the opportunities. One of their most interesting statistics has to do with minimum project size inflation. As recent as 2000, only about 13% of all multifamily completions in the US had more than 50 units. Today, this number has jumped to more than 55% of all new multifamily buildings, meaning we are quickly losing our ability to build small and intimate.
Point access blocks can help with this.
Of course, the reason we have exiting requirements in our building codes is because of life safety. But there's research to suggest that this level of redundancy may not be needed in certain buildings. According to the above policy brief, the average death rate (caused by a building) in point access block countries like Switzerland, France, Italy and Germany, is significantly lower than that of the US. On top of this, almost no countries in the EU require buildings less than 28m tall to be sprinklered. The US does.
All of this said, I don't think that single-stair buildings are a silver bullet for missing middle housing. It is just one important ingredient in a complicated recipe. And as evidence of this, we can look to Seattle. The 2018 Seattle Building Code allows point access blocks up to 6 storeys, which is a rare occurrence in the US. However, the city appears to be still working on missing middle reform. Presumably other ingredients are still -- missing.
