Overview

• co2online projects average 2025 costs for a 70 m² apartment at about €1,180 for gas (+15%), €1,245 for district heating (+2%), €1,055 for oil (+3%), €740 for pellets (+20%) and €715 for heat pumps (+5%).
• The report cites higher energy prices and a cold start to 2025 as the main reasons for the near‑term increase in household heating bills.
• Looking ahead, co2online expects the costs of heating with gas and oil to be roughly three times today’s levels in 20 years, with district heating and pellets about doubling and heat pumps seeing the most moderate rise.
• Consumption benchmarks include average annual gas use of roughly 7,980 kWh for a 70 m² flat and 15,730 kWh for a 130 m² house, with oil at about 8,610 kWh and 21,450 kWh, respectively.
• Nine in ten households could reduce bills by around €400 per year, with simple steps saving up to 10% energy and larger upgrades delivering greater long‑term reductions.