{"id":556346,"date":"2026-05-05T14:06:27","date_gmt":"2026-05-05T14:06:27","guid":{"rendered":"https:\/\/winklersart.com\/?p=556346"},"modified":"2026-05-05T14:06:27","modified_gmt":"2026-05-05T14:06:27","slug":"this-stockholm-neighborhood-was-built-on-ambitious-sustainability-goals-when-it-came-up-short-it-doubled-down-and-became-a-blueprint-for-others","status":"publish","type":"post","link":"https:\/\/winklersart.com\/?p=556346","title":{"rendered":"This Stockholm Neighborhood Was Built on Ambitious Sustainability Goals. When It Came Up Short, It Doubled Down and Became a Blueprint for Others"},"content":{"rendered":"
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The original plan for Hammarby Sj\u00f6stad was for an eco-village aimed at attracting the Olympics. They never came, but the locals moved in and, with upgrades, hope to be carbon neutral by 2030<\/h2>\n
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Christa Avampato<\/p>\n

| Freelance writer<\/span><\/p>\n

\n\"Hammarby\n <\/picture>
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Hammarby Sj\u00f6stad was originally engineered to have a carbon footprint 50 percent lower than the rest of Stockholm.
\n Carlos Sanchez Pereyra\/Getty Images<\/span>
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I did not go to Stockholm to study the future of urban design. I went because I wanted to relax in a beautiful city known for its history, art, food and friendly people.<\/p>\n

It was early August 2025. I arrived in the Hammarby Sj\u00f6stad district fresh from my graduation ceremony at University of Cambridge, where I had just finished my master\u2019s degree in sustainability leadership, not knowing anything about the Hammarby Model.<\/p>\n

To the casual observer and tourist like me, Hammarby Sj\u00f6stad is a scenic waterfront district. But beneath the timber boardwalk lies a feat of engineering\u2014an invisible machine that transforms waste into energy.<\/p>\n

A waiter at a local Vietnamese spot called Madame Thu introduced me to the eco-village, built in phases beginning in the mid-1990s as part of Stockholm\u2019s unsuccessful bid to host the 2004 Summer Olympics.<\/p>\n

He gestured to the ski slope visible in the distance\u2014the same one my hotel room overlooked\u2014and dropped a casual bombshell with a wry smile. \u201cYou know that ski slope used to be a landfill, right?\u201d he said.<\/p>\n

He explained the heat used to make my pho came from waste. The public transit I took to get to the restaurant ran on food scraps from yesterday\u2019s lunch. The beautiful reed beds in the nearby Sickla Canal were engineered filtration systems. There was an invisible, multilayered story underlying every view.<\/p>\n

Shortly after I returned to New York, I overheard two college students on the subway speaking Swedish. When I told them I had just visited Hammarby Sj\u00f6stad and was blown away by its sustainability, they exchanged knowing glances. \u201cIt\u2019s a good start,\u201d one said with a polite smile, \u201cbut it could be much better.\u201d They exited at the next stop, leaving me to wonder what they meant. How could it be better? I went looking for answers.<\/p>\n

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\"This

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Aerial photograph of the first phase of Hammarby Sj\u00f6stad<\/p>\n

White Arkitekter<\/span><\/p>\n<\/figcaption><\/figure>\n

In the early 2000s, global urban planners from Shanghai to London visited Stockholm to study the Hammarby Model. Originally planned to address Stockholm\u2019s housing shortage, the district was transformed into a pioneering experiment in integrated infrastructure to bolster the city\u2019s bid for the Olympics. Planners marveled at the vacuum waste system that sucked trash through underground pipes at up to 40 miles per hour, reducing the need for garbage trucks. They celebrated a closed-loop ecosystem that transformed wastewater into biogas and solid waste into district heating. It was an exemplar for sustainable urban development.<\/p>\n

But the design had a flaw: while the hardware was groundbreaking at the time, the project missed its ambitious energy and economic targets. The residents weren\u2019t seeing what developers had promised, because the engineers hadn\u2019t accounted for actual human behaviors or invited the community to participate in decision-making. The Swedish students were right\u2014the system lacked the citizen collaboration required to make the technology work.<\/p>\n

In 2011, a small group of concerned, self-empowered citizens led by Allan Larsson\u2014a retired statesman who had served as Sweden\u2019s finance minister\u2014decided to take the reins. They realized that for Hammarby to reach its full potential, residents could no longer be passive consumers; they had to be engaged decision-makers. Around Larsson\u2019s kitchen table, they formed what would become ElectriCITY, focused on providing the community, technology and actionable data needed to change behaviors. They began charting a new course: a citizen-led mission to become climate-neutral by 2030, putting the residents, not the municipality, at the center of Hammarby\u2019s model for change.<\/p>\n

Hammarby Sj\u00f6stad 1.0\u2019s Olympic dreams<\/h2>\n

To the outside world, Hammarby Sj\u00f6stad looked like a utopia in the early 2000s. In the 1990s, it was a heavily polluted brownfield area\u2014a mix of industrial sites, warehouses and old railway tracks. The revitalization project sought to turn this roughly 600-acre area into a district with a carbon footprint 50 percent lower than the rest of Stockholm.<\/p>\n

The urgent mission and vision of Hammarby Sj\u00f6stad was the brainchild of Mats Hulth, the Social Democratic mayor of Stockholm in the 1990s, and planner Jan Inghe-Hagstr\u00f6m. Seeking to reinvent Stockholm\u2019s image for the new millennium, Hulth and Inghe-Hagstr\u00f6m positioned the neighborhood as both an answer to the city\u2019s housing shortage and the crown jewel of its Olympic bid. From the start, planners designed the Olympic Village with a lifespan far beyond the games; once the athletes departed, the high-performance housing would be converted into a permanent residential neighborhood for 25,000 people.<\/p>\n

After losing the bid to Athens, Stockholm decided to revitalize the district anyway. In 1997, the city adopted an ambitious environmental program, setting strict targets that were twice as stringent as conventional construction at the time.<\/p>\n

The project functioned as a massive public-private partnership. The City of Stockholm, which owned the land, acted as the lead coordinator. It sold plots to private developers on the condition that they follow the Hammarby Model. Funding was a collaborative effort. The city invested roughly 500 million Euros in specialized infrastructure while private developers spent approximately 3 billion Euros on residential and commercial construction.<\/p>\n

To manage this, the city utilized a unique eco-governance model. Typically, city departments for water, energy and waste operate independently. In Hammarby, Hulth called for these departments to work together. They assembled integrated project teams with representatives from city departments responsible for planning, roads, real estate, water and waste. For the first time, the output of the waste department\u2014combustible trash\u2014became the input for the energy department in the form of district heating.<\/p>\n

The first phase, largely complete by 2014, included several groundbreaking features. Architect Mats Egelius used large glass facades and balconies to maximize the scarce Swedish sunlight and reduce the need for artificial lighting. Silver waste chutes on every street <\/strong>corner connected to a subterranean vacuum system that whisked trash away at high speeds to a central processing plant. The district\u2019s sewage was treated locally to extract biogas, which fueled the city\u2019s public buses and the cooktops in resident kitchens. Open-air canals and green roofs filtered rain and melting snow through the soil before it reached the Baltic Sea.<\/p>\n

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The stormwater system in Hammarby Sj\u00f6stad features canals and green roofs that filter rain and melting snow.<\/p>\n

Christa Avampato<\/span><\/p>\n<\/figcaption><\/figure>\n

The global hype vs. the reality check<\/h2>\n

In its early years, media perception of the district was near-mythic. Global outlets often described it as a miracle on the water. Egelius, the original architect of Hammarby Sj\u00f6stad with the firm White Arkitekter, remembers that the international interest was immediate and intense. The delegations were coming from all over the world, he said, to see how they had integrated the technical systems so seamlessly into the urban fabric. It was a design triumph that proved that sustainable could be beautiful.<\/p>\n

However, the scientific community offered a more measured perspective. \u00d6rjan Svane, a researcher at KTH Royal Institute of Technology, saw the cracks in the model early on. Once residents moved in, technical management was often poor; energy systems were sometimes installed incorrectly or not maintained, and residents didn\u2019t have access to the data they needed to understand their own consumption. The technology was there, but the human management needed to run it effectively was missing.<\/p>\n

Maria Xylia, a senior research fellow at the Stockholm Environment Institute, says that while the world watched the hardware, the data told a different story: The energy story of Hammarby Sj\u00f6stad 1.0 did not hit the mark. \u201cThe reality was that it only achieved about a 30 to 40 percent reduction,\u201d in environmental impact Xylia says, short of the 50 percent goal. \u201cThe targets were missed because the design hadn\u2019t accounted for the actual energy use and habits of the people living there.\u201d<\/p>\n

To those who say that 30 to 40 percent reduction is good enough, she argues, \u201cThe targets need to represent the highest possible ambition, because when targets are watered down, so is the ambition.\u201d<\/p>\n

Egelius not only designed Hammarby Sj\u00f6stad, he\u2019s lived there for 31 years. His architectural vision was as environmental as it was aesthetic, rooted in the belief that smart design could meet aggressive energy targets. He pioneered the use of floor-to-ceiling glazing to maximize natural light and heat, and he structured the buildings around shared social spaces\u2014like communal launderettes and collective housing\u2014to reduce the district\u2019s overall energy footprint. For Egelius, the architecture was a deliberate tool to move residents away from passive consumption and toward a more collaborative, low-impact lifestyle.<\/p>\n

\u201cI design architecture to make people happy,\u201d Egelius explains. \u201cAnd relationships make people happy. We wanted to create many meeting points in the community to make people see each other and say hello.\u201d<\/p>\n

He designed the buildings with mixed housing types\u2014from multi-bedroom apartments to smaller single flats\u2014to ensure diversity and allow residents to size up or down without needing to move and lose their connections and community. Crucially, he incorporated communal spaces such as courtyards and gardens to foster interactions and relationships between neighbors.<\/p>\n

\u201cThe social aspects are fundamental and need to be included from the very beginning,\u201d says Anna Graaf, White Arkitekter\u2019s sustainability director. \u201cWe regularly carry out social impact assessments and initiate various forms of dialogue and co-design processes. We notice that social aspects are increasingly valued financially, both in the short and long term.\u201d<\/p>\n

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For architect Mats Egelius, the district’s architecture was a deliberate tool to move residents away from passive consumption and toward a more collaborative, low-impact lifestyle.<\/p>\n

White Arkitekter<\/span><\/p>\n<\/figcaption><\/figure>\n

The social side of Hammarby worked beautifully. For example, Egelius\u2019 building has a communal dining space where he and about 40 of his neighbors cook and eat dinner together four times per week. This example of shared lifestyle demonstrates the communal readiness Larsson and his burgeoning ElectriCITY had identified in 2011. A dense social fabric would serve as the foundation for the next phase of the district.<\/p>\n

The missed targets were a reality check. The existing technology had done all it could, but a system is only as efficient as the people living inside it. To close the gap, the district needed a new strategy centered on the human factor. In the context of Hammarby 2.0, this meant moving beyond municipal engineering and empowering residents with the data, tools and incentives to manage their own consumption. It required a shift from being passive residents of a green district to becoming active partners in its performance, using their sense of community to drive the behavioral changes that no vacuum tube or biogas plant could achieve on its own.<\/p>\n

\u201cHammarby 1.0 was a masterpiece of Stockholm\u2019s mayor,\u201d Larsson says. \u201cHammarby 2.0 had to be citizen-led.\u201d<\/p>\n

Svane, who studies the district\u2019s governance, uses the Swedish concept of radighet<\/em>\u2014translated as \u201cagency.\u201d<\/p>\n

\u201cThe actor can make progress by acting within its own fields of influence,\u201d Svane says. \u201cIdentify what can be easily changed quickly and by whom. Figure out who are the real agents of change and give them support.\u201d<\/p>\n

The kitchen table cure<\/h2>\n

Fifteen years ago, looking at his own energy bills, Larsson saw the district\u2019s innovation aging. Energy costs were rising and building systems were underperforming. The technology was there, but the results fell short, costing residents money and leaving the district\u2019s lofty environmental goals out of reach.<\/p>\n

So, he did what a storyteller does: he wrote an article in the local newspaper explaining his rising energy bills and asking his neighbors if they saw their bills rising, too. His neighbors confirmed they did, and he invited them to his kitchen table to brainstorm solutions. Through their dialogue, the issues they uncovered were structural. The energy companies provided the power and heat to the district but had no stake in the efficiency of the pipes and wires inside the private buildings; the city had the policy goals but did not own the buildings; and the residents who used energy did not have the data they needed to make changes.<\/p>\n

Larsson\u2019s kitchen gathering matched the communal spirit of Egelius\u2019s architectural design. Around Larsson\u2019s table, he and his neighbors planted the seeds of the district\u2019s second act\u00ad\u2014ElectriCITY, a citizen-led initiative that would transform the district from Hammarby Sj\u00f6stad 1.0\u2019s static model into Hammarby Sj\u00f6stad 2.0\u2019s circular economy test bed.<\/p>\n

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Quick fact: Where exactly is Hammarby Sj\u00f6stad?<\/p>\n

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  • The 600-acre district is south of Stockholm’s city center and sits along Lake Hammarby.<\/li>\n<\/ul><\/div>\n<\/div>\n

    Utilizing Svane\u2019s research and counsel, ElectriCITY realized the agents of change they could influence and support were the housing associations in Hammarby Sj\u00f6stad. The housing associations needed energy data in an accessible, actionable format to lower their energy use and costs.<\/p>\n

    J\u00f6rgen L\u00f6\u00f6f, a business and marketing executive turned community organizer, is the CEO of ElectriCITY. He lived in Hammarby for 15 years and originally got involved as a concerned resident.<\/p>\n

    \u201cSustainability goals needed to be financially irresistible to be viable and scalable,\u201d he says. \u201cPeople will engage with energy issues if it\u2019s fun to solve these problems together.\u201d<\/p>\n

    Rickard Dahlstrand, chief technology officer of ElectriCITY and a resident of Hammarby, describes a system where residents do not need to think about sustainability. He explains, \u201cPeople want to live their lives confident that the energy they use to charge the car, wash clothes and heat their homes is being produced in the cleanest, most economical way. The best technology is the kind you don\u2019t see.\u201d<\/p>\n

    The problem in Hammarby, according to L\u00f6\u00f6f and Dahlstrand, was the persistence of inaccessible data: the water company did not talk to the electric company, and neither talked to the residents. Under the pair\u2019s leadership, ElectriCITY builds digital tools to break down the data silos. For the first time, housing associations that are members of ElectriCITY could see exactly where and how much energy they used compared to their neighbors. Then, they shared their knowledge and ideas to help one another use less energy and save money. ElectriCITY calls this the \u201ctwin transition\u201d\u2014combining sustainability goals with digital transformation.<\/p>\n

    Going a step further, ElectriCITY leveraged the trust and the relationships it built with the housing associations to guide them to act as a collective to increase their market power. That allowed them to negotiate bulk deals on energy services and products. The results have been so effective that the housing associations have invested 250 million Swedish krona (about $27 million U.S. dollars) into energy retrofits.<\/p>\n

    A prime example is electric vehicle (EV) charging. Dahlstrand explains that residents plug in their cars when they get home from work\u2014right when the grid is most strained by cooking and lighting.<\/p>\n

    \u201cIt\u2019s the worst time to charge,\u201d Dahlstrand says. \u201cThat\u2019s when the energy is dirtiest and most expensive.\u201d<\/p>\n

    So, ElectriCITY helped install smart EV chargers that talk to each other. Now, residents plug in when they arrive home, but the charging starts in the middle of the night when electricity is clean, inexpensive and abundant.<\/p>\n

    The new project did not replace the original infrastructure; it optimized it. While the previous era focused on the heavy hardware, such as waste-to-energy plants and vacuum suction tubes, the evolution added a digital layer of sensors and smart controls. For example, ElectriCITY is introducing smart heat pumps and ventilation systems that use A.I. to predict weather patterns and adjust a building\u2019s temperature before the outdoor air even changes. It is also updating the district\u2019s famous vacuum waste system with optical sorting technology, allowing for more precise recycling.<\/p>\n

    Larsson took the lessons from his kitchen table and scaled them up through Viable Cities, a national Swedish innovation program he helps lead. The result is the Climate City Contract 2030, a nonbinding pact now used by the European Union\u2019s 100 Climate-Neutral Cities Mission to foster investment and digitalization to speed up the transition to carbon neutrality by 2030, influencing broad European efforts for sustainable urban development.<\/p>\n

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    Climate City Contract 2030 holds a signing ceremony. The non-binding pact is now used by the European Union\u2019s 100 Climate-Neutral Cities Mission to foster investment in carbon neutrality by 2030.<\/p>\n

    Fredrik Persson\/Viable Cities<\/span><\/p>\n<\/figcaption><\/figure>\n

    The contract solidifies the relationship between a city, its businesses and its citizens. It acknowledges a municipality cannot solve the climate crisis alone and needs the trust and investment of residents, companies and academia\u2014what ElectriCITY calls the quadruple helix.<\/p>\n

    Measuring the momentum<\/h2>\n

    Today, Hammarby Sj\u00f6stad is no longer just aiming for the original 50 percent reduction, it is pursuing climate neutrality. Specific buildings in the district have already achieved significant measurable gains. Energy use in residential buildings that have undergone the ElectriCITY-led retrofits has dropped by an average of 20 to 30 percent beyond the 1.0 baseline. When combined with the original efficiencies, many of these buildings are now operating at a 60 to 70 percent total reduction in energy use compared to conventional Stockholm housing.<\/p>\n

    Financially, the model has proven its viability. The 250 million Swedish krona invested by housing associations has not only lowered carbon footprints but also reduced annual energy costs for residents by millions of Swedish krona. On a broader scale, the district is on pace to meet its 2030 carbon-neutral target. This progress is driven by a steady transition to 100 percent renewable energy for the local grid and the rapid expansion of solar-cell coverage on rooftops, which currently provides a growing share of the community\u2019s domestic electricity. By focusing on the quadruple helix, Hammarby is proving that the gap to climate neutrality is best closed through collective investment rather than municipal mandates alone.<\/p>\n

    New York state of mind<\/h2>\n

    Back home in Brooklyn, I ruminate on three factors Larsson gave me to consider when thinking about how to apply the Hammarby Model in New York.<\/p>\n

    \u201cFirst, climate transition is a task for cities,\u201d he says. \u201cCities cover 3 percent of the Earth but produce 70 percent of emissions.\u201d<\/p>\n

    Second, 99 percent of a city is already built. \u201cIf you\u2019re going to tackle climate emissions, you have to manage the city\u2019s existing buildings,\u201d Larsson says.<\/p>\n

    Finally, you have to engage citizens and real estate owners. \u201cHigh energy use is expensive,\u201d he adds. \u201cYou can save money by reducing it. You can also save on interest rates by showing you have a well-run association.\u201d<\/p>\n

    The sustainability argument alone cannot precipitate lasting behavior change. \u201cIt\u2019s important to see the economic side of it,\u201d says Larsson. \u201cWe have not sold climate or \u2018twin transition\u2019 in Hammarby only on climate issues. We have done it because it makes good economic sense.\u201d<\/p>\n

    Manhattan landlords are currently scrambling to comply with Local Law 97, the city\u2019s groundbreaking legislation to cut building emissions. They are installing heat pumps and upgrading windows, treating the buildings as tunable machines.<\/p>\n

    But the lesson from Hammarby is you cannot retrofit a city by changing only the hardware. You have to give residents the agency to share, learn and participate in change.<\/p>\n

    The hardware is important. The software\u2014the people\u2014is what makes it work.<\/p>\n

    Xylia, the researcher at the Stockholm Environment Institute, now watches the evolution of Hammarby 2.0 from her office within the district. She sees the citizen-led retrofitting of buildings as the necessary completion of the original vision. Her hope is that Hammarby serves as a global laboratory, proving ElectriCITY\u2019s thesis that high-performance technology reaches its potential only when combined with high-performance community engagement.<\/p>\n

    By giving residents the data and the agency to act, Hammarby Sj\u00f6stad is a reminder that we do not just need smarter buildings, we need smarter ways of living together.<\/p>\n