Brandon Donnelly
Daily insights for city builders. Published since 2013 by Toronto-based real estate developer Brandon Donnelly.
Brandon Donnelly
Daily insights for city builders. Published since 2013 by Toronto-based real estate developer Brandon Donnelly.
Building height and density are not one and the same. You can have tall buildings configured in a low-density way (think post-war towers in the park). And you can have low/mid-rise buildings configured in a high-density way (think Paris and Barcelona). This is one of the reasons why it is important to decouple density and tallness when thinking about our cities.
This line of thinking is the approach that a recent study took when trying to determine the optimal built form for minimizing climate impact. In the study they define four building typologies: 1) high density, high-rise, 2) low density, high-rise, 3) high density, low-rise, and 4) low density, low-rise.
What they found was that taller environments tend to have higher life cycle GHG emissions, but that lower-density environments are (obviously) far more land consumptive. To determine life cycle GHG emissions they looked at both embodied and operating emissions, which is why the taller stuff didn't score as well under their methodology. There's typically a lot of concrete and steel in tall buildings.
This lead the team to conclude that if you want to optimize around climate impact, you should probably aim for that perfect middle ground: dense, but not super tall.
But as Joe Cortright (City Observatory) rightly pointed out in his email newsletter, one of the big limitations of this analysis is that it does not consider transportation-related impacts. And since we know that transportation is one of if not the largest source of GHG emissions and that how we get around is heavily dependent on land use patterns, it is probably an important piece to consider.
Photo by Alfons Taekema on Unsplash
Building height and density are not one and the same. You can have tall buildings configured in a low-density way (think post-war towers in the park). And you can have low/mid-rise buildings configured in a high-density way (think Paris and Barcelona). This is one of the reasons why it is important to decouple density and tallness when thinking about our cities.
This line of thinking is the approach that a recent study took when trying to determine the optimal built form for minimizing climate impact. In the study they define four building typologies: 1) high density, high-rise, 2) low density, high-rise, 3) high density, low-rise, and 4) low density, low-rise.
What they found was that taller environments tend to have higher life cycle GHG emissions, but that lower-density environments are (obviously) far more land consumptive. To determine life cycle GHG emissions they looked at both embodied and operating emissions, which is why the taller stuff didn't score as well under their methodology. There's typically a lot of concrete and steel in tall buildings.
This lead the team to conclude that if you want to optimize around climate impact, you should probably aim for that perfect middle ground: dense, but not super tall.
But as Joe Cortright (City Observatory) rightly pointed out in his email newsletter, one of the big limitations of this analysis is that it does not consider transportation-related impacts. And since we know that transportation is one of if not the largest source of GHG emissions and that how we get around is heavily dependent on land use patterns, it is probably an important piece to consider.
Photo by Alfons Taekema on Unsplash
One, there are silver linings to this pandemic. And one of them is that it has forced us to rethink how we allocate public space and how we engage with it. It is incredible seeing Toronto right now with so many outdoor patios in full swing. Why eat inside when you can eat outside? We should have been doing this all along.
Two, the transformation of Toronto's Yonge Street cannot happen fast enough. We are sorely missing a pedestrianized spine through the middle of our downtown. This portion of Yonge Street currently looks like shit and I know that we can do much better.
Think La Rambla in Barcelona. Grafton Street in Dublin. Lincoln Road in Miami Beach. These are the streets that seem to always draw you in. They are places where public life can play out. I'm pretty sure that I have never once visited any of these cities and not walked these streets.
Thankfully Yonge Street's transformation is underway. So let's make it truly remarkable and one of the most beautiful streets in the world. That should be the bar we set for ourselves.
Image: Westminster City Council
I have come to the realization that I don't get nearly enough emails throughout the day (sarcasm), and so I've just subscribed to Overview's daily post.
Overview is a company that uses satellite and aerial imagery to show how humans and natural forces are shaping the earth. In addition to a daily post, their work includes stories, books, prints, and various other projects and collaborations. It's pretty cool stuff.
One example of a partnership is this one here with ArchDaily, where they look at urban block patterns around the world. Everywhere from Barcelona to Belo Horizonte. I think many of you will enjoy flipping through these aerials.
And if you're interested in this topic (you know, urban morphology), you may also enjoy this book by Ildefons Cerdà called, The General Theory of Urbanization 1867. Cerdà, and his work, were instrumental in shaping Barcelona at a time when the word "urbanization" didn't even really exist.
Photo by Kaspars Upmanis on Unsplash
One, there are silver linings to this pandemic. And one of them is that it has forced us to rethink how we allocate public space and how we engage with it. It is incredible seeing Toronto right now with so many outdoor patios in full swing. Why eat inside when you can eat outside? We should have been doing this all along.
Two, the transformation of Toronto's Yonge Street cannot happen fast enough. We are sorely missing a pedestrianized spine through the middle of our downtown. This portion of Yonge Street currently looks like shit and I know that we can do much better.
Think La Rambla in Barcelona. Grafton Street in Dublin. Lincoln Road in Miami Beach. These are the streets that seem to always draw you in. They are places where public life can play out. I'm pretty sure that I have never once visited any of these cities and not walked these streets.
Thankfully Yonge Street's transformation is underway. So let's make it truly remarkable and one of the most beautiful streets in the world. That should be the bar we set for ourselves.
Image: Westminster City Council
I have come to the realization that I don't get nearly enough emails throughout the day (sarcasm), and so I've just subscribed to Overview's daily post.
Overview is a company that uses satellite and aerial imagery to show how humans and natural forces are shaping the earth. In addition to a daily post, their work includes stories, books, prints, and various other projects and collaborations. It's pretty cool stuff.
One example of a partnership is this one here with ArchDaily, where they look at urban block patterns around the world. Everywhere from Barcelona to Belo Horizonte. I think many of you will enjoy flipping through these aerials.
And if you're interested in this topic (you know, urban morphology), you may also enjoy this book by Ildefons Cerdà called, The General Theory of Urbanization 1867. Cerdà, and his work, were instrumental in shaping Barcelona at a time when the word "urbanization" didn't even really exist.
Photo by Kaspars Upmanis on Unsplash
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