Circular resources, energy and buildings

Stockholm Royal Seaport, A fossil-free district

Stockholm Royal Seaport will be a fossil-free district with low resource use and minimal environmental and climate impact. To reduce energy use, all new buildings are designed according to passive house requirements with well-insulated building envelopes and energy-efficient fittings and appliances. Furthermore, renewable energy should be generated locally.

At Stockholm Royal Seaport, energy calculations are submitted for all phases of building projects. The review of the first phase Norra 2, after two years of occupancy, showed that energy performance is 22 per cent lower than the applicable Swedish building code regulations and means that buildings in the area meet the zero-energy directive.


Stockholm’s first multi-family house that generates more energy than it disposes. The plus-energy building is located in the Backåkra block in Brofästet.

To study the feasibility of a plus energy building, a land allocation competition was held in 2014 where the tenants moved in 2019. The first-year metering showed that the target are well met.

Innovative energy solutions in plus-energy buildings >

Most buildings are connected to the district heating system with a combined-heat and power plant in the area, Värtaverket, one of the largest bio-CHP plants in Europe. The utility works actively by replacing fossil fuels with bio-based fuels. To contribute with fossil-free energy, solar energy or solar heat is produced on all buildings.

The average solar energy produced for dwellings is 558 MWh.

Interactive map with locally generated solar energy

During the design and construction phases, a substantial proportion of climate impact depends on the materials used. All developers shall at an early stage make climate calculations for the buildings. Climate calculations for public open spaces are carried out and knowledge building is ongoing.

Stockholm Royal Seaport: Energy and digitalization

To increase awareness on energy use R&D projects on digitalization have been implemented to test how data can be used for behavioral change and optimization of energy flows in the larger system.

Smart energy city (In Swedish).

The Stockholm Royal Seaport development project is also testing and preparing to use the cities central platform for IoT and sharing of data, this within the project Connected Stockholm Royal Seaport. Enhanced data collection and IoT provides information about the district and opportunities to follow up on targets and continuously optimize activities and planning. Data where tests are now ongoing include energy and water usage of buildings, travel patterns of people living in the area and more.

Innovative energy solutions in plus-energy buildings >
Värtaverket CHP plant, Fortums webpage >
Resource efficiency and climate responsibility >

Circular resources

Stockholm Royal Seaport will be a fossil-free district with low resource use and minimal environmental and climate impact. Infrastructure is being developed integrating energy, water supply, waste water, and transport systems.

Reflow – educational presentation of the hidden urban cycles >

The waste collection systems for households and businesses are designed to separate recyclable and reusable materials, organic waste and residual waste. The system is based on; waste grinder for organic waste, vacuum waste collection system for plastic, newspaper and residual waste, recycling rooms for other waste streams, a mobile reuse station, Pop-Up Reuse – which began as an innovation competition within the Royal Seaport project – and an automated station for hazardous waste. This reduces heavy vehicle traffic and makes it easier to sort waste and leads to zero waste to landfill.

Optimized waste management system >

To further improve management of wastewater and source-separated wastewater systems, (black- and greywater) will be introduced.

Source-separated waste water system for Värtahamnen and Loudden >


Recycling rooms for waste streams other than plastic, newspaper and residual waste.

Pop-Up Reuse is a mobile reuse station that started in Stockholm Royal Seaport in 2015 and subsequently expanded throughout Stockholm.

During the construction phase, local soil remediation and reuse of remediated, excavated materials is prioritized. To increase the reuse of excavated material, the Royal Seaport Project has developed and built a so-called “Mass Consolidation Centre”, where primarily contaminated material is sorted and reused.

How the Mass Consolidation Centre works >


In 2018, the Mass Consolidation Centre was opened in Frihamnen to streamline bulk materials management with the help of on-site sorting and remediation.

To date, more than two million tonnes of excavated materials have been handled on site and almost 800,000 tonnes have been recycled. The mass balance is about 41 per cent, the remaining materials cannot be used due to the low structural quality.