Wild cities and concrete corridors: How AI is reimagining the landscape

Drifts of ground cover plants and wildflowers along the steps of the Sydney Opera House, traffic obscured by meadow-like planting and kangaroos pausing on city streets.

This is the way our cities could be, as imagined by landscape architect Jon Hazelwood, principal at multi-disciplinary architectural firm Hassell. He has been exploring the possibilities of rewilding urban spaces using AI for his Instagram account, Naturopolis_ai with visually arresting outcomes.

“It took me a few weeks to get interesting results,” he said. “I really like the ephemeral nature of the images — you will never see it again and none of those plants are real.

“The AI engine makes an approximation of a grevillea.”

Hazelwood chose some of the most iconic locations in Australia, including the Sydney Opera House and the Harbour Bridge, as well as international cities such as Paris and London, to demonstrate the impact of untamed green spaces on streetscapes, plazas and public space.

He said he hopes to provoke a conversation about the artificial separation between our cities and the broader environment, exploring ways to break down the barriers and promote biodiversity.

“A lot of the planning (for public spaces) is very limited,” Hazelwood said. “There are 110,000 species of plants in Australia and we probably use about 12 in our (public) planting schemes.

“Often it’s for practical reasons because they’re tough and drought tolerant — but it’s not the whole story.”

Hazelwood pointed to the work of UK landscape architect Prof Nigel Dunnett, who has championed wild garden design in urban spaces. He has drawn interest in recent years for his work transforming the brutalist apartment block at the Barbican in London into a meadow-like environment with diverse plantings of grasses and perennials.

Hazelwood said it is this kind of ‘complex nature’ that is required for cities to thrive into the future, but it can be hard to convince planners and developers of the benefits.

“We have been doing a lot of work on how we get complex nature because complexity of species drives biodiversity,” he said.

“But when we try to propose the space the questions are: how are we going to maintain it? Where is the lawn?

“A lot of our work is demonstrating you can get those things and still provide a complex environment.”

At the moment, Hassell together with the University of Melbourne is trialling options at the Hills Showground Metro Station in Sydney, where the remaining ground level planting has been replaced with more than 100 different species of plants and flowers to encourage diversity without the need for regular maintenance. But more needs to be done, Hazelwood said.

“It needs bottom-up change,” he said. ““There is work being done at government level around nature positive cities, but equally there needs to be changes in the range of plants that nurseries grow, and in the way our city landscapes are maintained and managed.”

And there’s no AI option for that.

There has been a substantial increase in the number of Australians earning high incomes who are renting their homes instead of owning them, and this may be another element contributing to higher market demand and continually rising rents, according to new research.

The portion of households with an annual income of $140,000 per year (in 2021 dollars), went from 8 percent of the private rental market in 1996 to 24 percent in 2021, according to research by the Australian Housing and Urban Research Institute (AHURI). The AHURI study highlights that longer-term declines in the rate of home ownership in Australia are likely the cause of this trend.

The biggest challenge this creates is the flow-on effect on lower-income households because they may face stronger competition for a limited supply of rental stock, and they also have less capacity to cope with rising rents that look likely to keep going up due to the entrenched undersupply.

The 2024 ANZ CoreLogic Housing Affordability Report notes that weekly rents have been rising strongly since the pandemic and are currently re-accelerating. “Nationally, annual rent growth has lifted from a recent low of 8.1 percent year-on-year in October 2023, to 8.6 percent year-on-year in March 2024,” according to the report. “The re-acceleration was particularly evident in house rents, where annual growth bottomed out at 6.8 percent in the year to September, and rose to 8.4 percent in the year to March 2024.”

Rents are also rising in markets that have experienced recent declines. “In Hobart, rent values saw a downturn of -6 percent between March and October 2023. Since bottoming out in October, rents have now moved 5 percent higher to the end of March, and are just 1 percent off the record highs in March 2023. The Canberra rental market was the only other capital city to see a decline in rents in recent years, where rent values fell -3.8 percent between June 2022 and September 2023. Since then, Canberra rents have risen 3.5 percent, and are 1 percent from the record high.”

The Productivity Commission’s review of the National Housing and Homelessness Agreement points out that high-income earners also have more capacity to relocate to cheaper markets when rents rise, which creates more competition for lower-income households competing for homes in those same areas.

ANZ CoreLogic notes that rents in lower-cost markets have risen the most in recent years, so much so that the portion of earnings that lower-income households have to dedicate to rent has reached a record high 54.3 percent. For middle-income households, it’s 32.2 percent and for high-income households, it’s just 22.9 percent. ‘Housing stress’ has long been defined as requiring more than 30 percent of income to put a roof over your head.

While some high-income households may aspire to own their own homes, rising property values have made that a difficult and long process given the years it takes to save a deposit. ANZ CoreLogic data shows it now takes a median 10.1 years in the capital cities and 9.9 years in regional areas to save a 20 percent deposit to buy a property.

It also takes 48.3 percent of income in the cities and 47.1 percent in the regions to cover mortgage repayments at today’s home loan interest rates, which is far greater than the portion of income required to service rents at a median 30.4 percent in cities and 33.3 percent in the regions.

Wild cities and concrete corridors: How AI is reimagining the landscape

A new AI-driven account by leading landscape architect Jon Hazelwood pushes the boundaries on the role of ‘complex nature’ in the future of our cities

This may be contributing to continually rising weekly rents