When we talk about energy-efficient houses in Sweden, we usually mean buildings that consume significantly less energy than average – typically by combining thoughtful design, high-quality insulation, ventilation with heat recovery, and sometimes their own energy production. A common concept is the passive house, characterized by an airtight and extremely well-insulated building envelope together with mechanical ventilation with efficient heat recovery. Energy consumption in low-energy houses is usually around 50–70 kWh/m² per year, far below that of older houses (built before 1970), which can sometimes exceed 250 kWh/m²/year. An even higher standard is Energy Class A, with consumption below 45 kWh/m²/year.
In Sweden, there are certification systems such as Miljöbyggnad, which rates buildings according to energy use, indoor environment, and choice of materials, with levels bronze, silver, and gold.
Why Are Energy-Efficient Houses Economically Worthwhile?
Lower energy costs
Fewer kilowatt-hours are used for heating, hot water, and household electricity – directly reducing costs. The higher electricity prices rise, the greater the savings.
Reduced vulnerability to price fluctuations
When a house has low energy demand, the impact of high electricity prices becomes much easier to manage.
Better indoor comfort and health
A well-insulated structure and balanced ventilation provide a comfortable indoor climate – no cold drafts or overheating – and a healthier living environment.
Increased property value at resale
Energy-efficient houses are more attractive to buyers, which can lead to faster sales and higher prices.
Contribution to a sustainable energy system and climate goals
Single-family homes account for a large share of Sweden’s energy use – energy-efficient houses help achieve national climate goals and reduce dependence on purchased electricity.