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Hammarby Sjöstad, Stockholm

Making an entire sustainable urban district

A new district has emerged around the lake of Hammarby Sjö in Stockholm. A run-down port and industrial area has been cleaned up, developed and converted into a modern and eco-friendly district. Hammarby Sjöstad is Stockholm’s largest urban development project with its own environmental programme incorporating energy supply, water and wastewater treatment and waste management.

An integrated part of the city

Hammarby Sjöstad is a natural extension of Stockholm city centre. The civic ambience is a hallmark of the district’s design and planning and has necessitated extensive infrastructure adjustments. Transport barriers have been removed and old industrial and terminal sites closed down, consolidated or given new uses.

A large-scale project 

When complete, the Hammarby Sjöstad development will contain 11,000 apartments and accommodate an estimated 35,000 residents and workers. Mixed forms of tenure apply throughout the district, with a 45%-55% split between tenancy and tenant ownership. Municipal, commercial and public transport services are also expanding as Hammarby Sjöstad grows.

Multiple investors

Various different parties have financed the project. The City of Stockholm joined forces with 25 construction companies to build the district, with the latter contributing 80% of the total cost. Other funding comes from two government agencies - the Swedish Rail Administration (rail transport) and the Swedish Road Administration (routing of the Southern Link ring road).

Extensive environmental objects

The City of Stockholm set stringent environmental requirements for buildings, technical installations and traffic infrastructure right from the start. The aim is to halve the environmental impact of areas built in the early 1990s.

Nature preservation considerations have been paramount and new green spaces created. Contractors have cleaned up contaminated the land and transformed brownfield sites into attractive residential areas with fine parks and open spaces.

Wide range of public transports

Thanks to major investment, Hammarby Sjöstad is served by a modern public transport system, the Tvärbanan light railway, new bus services and a ferry service on Hammarby Sjö lake between the district’s southern and northern tips. Car pools are open to residents and people working in the area.

No harmful materials allowed

All materials used - inside and outside the buildings - were carefully selected based on environmental considerations. The philosophy is to use proven, sustainable materials and products with environmental declarations, and to avoid chemical products or building materials containing hazardous substances.

Sustainable and renewable energy

When Hammarby Sjöstad is complete its residents will produce half the energy they need – themselves. The focus will be on renewable fuels, re-use of waste heat, biogas and household energy efficiency. The adjacent Hammarby thermal  plant extracts heat from the treated wastewater and also contributes by-product energy to the district cooling network.

Waste as a resource

The Högdalen co-generation plant separates combustible waste as an energy source in electricity and district heating production. Another example of sustainable heat supply is the Hammarby thermal plant , which recovers waste heat from treated wastewater piped from the Henriksdal sewage treatment plant.

Centralised production of district heating and cooling is another feature, with cooling generated as a clean by-product of district heating production. Hammarby Sjöstad also has solar panel installations on its walls and rooftops that use photovoltaic cells to convert sunshine into energy for heating water.

Unique cycle system

The Hammarby model is a unique eco-cycle system that integrates energy, solid waste, water and wastewater for homes, offices and other activities in the area. Seen as a blueprint for city systems of the future, the cycle also includes all stormwater, rainwater and meltwater.

Domestic refuse is separated into different chutes and the various fractions are then transported by vacuum to containers at a central collecting station.

Recreation for better health

The district also aims to provide a healthy environment for residents, offering ample opportunities for exercise, sport and local culture.