This is a perennial debate in urbanist circles.
Mike Moffatt, founding director of the Missing Middle Initiative, recently wrote about it in The Globe and Mail and, not surprisingly, he cites survey results indicating that, if you ask most people in this part of the world, 90% will tell you that a two-storey single-detached house with a backyard is the most suitable for a young family.
However, a survey doesn’t actually answer the question. You need data. One challenge in parsing the data is that families who buy two-storey single-detached houses with a backyard also tend to be wealthier, more financially stable, and consistently employed. These features are broadly good for child development.
But according to Moffatt, if you strip away these variables, most of the advantages typically associated with this housing type disappear, except for one: access to green space.
Kids need space to play, and it’s good for development. But does the green space need to be a private backyard attached to the home? The article also cites a study from Scotland that determined the answer to be yes. Private green spaces where kids can play independently with minimal parental supervision are better than public parks.
Perhaps.
Scotland would fall into the “part of the world” that has a cultural bias toward single-family housing. There are many cities and places where most people live in multi-unit housing — places like continental Europe. Are the children there, you know, less developed?
There seems to be a general consensus that children need exposure to green space. Here, for example, is another study from Barcelona. But because single-family housing is so rare there, the researchers didn’t even consider that option.
Instead, they focused on urban spaces, finding that (1) green spaces proximate to schools were actually the most critical for cognitive development (versus near home and along their commute) and (2) trees and vegetation are an important filter for urban air pollution. So at this point, I’m going to reserve final judgement.
That said, the value of green spaces in general leaves city builders with an important insight: you may want to start with the green space strategy and then figure out the building type. Because there’s an argument to be made that it’s one of the most important pieces for families.











