Daily insights for city builders, delivered every morning at 6 AM ET. I’m Brandon Donnelly — a Toronto-based real estate developer and founder of Globizen. I’ve been writing here since 2013.
Here is another great video from About Here talking about how breaking certain rules could make for better apartment buildings.
The basis for the video is a design competition put on by Urbanarium, called Decoding Density, which asked participants to propose creative solutions for “six-story plus apartment forms in Metro Vancouver.”
More specifically, the competition asked: How might Vancouver intensify its single-family neighborhoods with small-scale wood-frame apartments?
The About Here video covers some of the common themes from the submissions and, not surprisingly, the first is single-stair buildings. Requiring only a single point of egress can really unlock small sites.
Some of the other ideas are, perhaps, a bit more adventurous; but these are valuable exercises. Many rules are dumb. So it’s important that we continually question them and search for better ways.
Conrad Speckert got in touch with me following yesterday’s post (about single-stair buildings) and he was kind enough to let me know that, this Thursday, Toronto Planning and Housing Committee will be considering this single exit stair item.
Included in the agenda item is a building code report that was done because City Council wanted to know if it were feasible to design multi-residential buildings up to four storeys that wouldn’t be detrimental to human health.
Now that the report is done, one of the recommendations being put forward this week is for Toronto to create a guideline that would help people prepare alternative solution proposals under the Ontario Building Code.
Alternative solutions provide greater design flexibility. We almost always have them come up on our projects. In essence, they are a way of saying, “yeah, I know this design doesn’t precisely meet the code, but it still satisfies its intent, and it works, so please approve it.”
In this particular instance, the idea is to create a public-facing guideline so that more people will be able to figure out how to build 4-storey buildings with a single means of egress. Again, the current maximum is 2 storeys.
Four storeys isn’t quite six storeys. But we’re getting there. And it has become increasingly obvious that it is now just a question of when, not if. At some point, we won’t be calling this an alternative solution proposal. It will just be — the way.
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.
