Castellum

Castellum, a real estate services company headquartered in Sweden, reported total emissions of approximately 63,881,000 kg CO2e in 2025. This includes Scope 1 emissions of 656,000 kg CO2e, Scope 2 emissions (market-based) of 5,185,000 kg CO2e, and Scope 3 emissions of 58,039,000 kg CO2e. In 2024, their total emissions were about 57,052,000 kg CO2e, comprising 639,000 kg CO2e from Scope 1, 4,946,000 kg CO2e from market-based Scope 2, and 51,467,000 kg CO2e from Scope 3. For 2023, total emissions stood at approximately 76,242,000 kg CO2e, with 384,000 kg CO2e from Scope 1, 10,260,000 kg CO2e from market-based Scope 2, and 65,598,000 kg CO2e from Scope 3.

Castellum is committed to significant climate action, with targets validated by the Science Based Targets initiative (SBTi). They aim to reduce absolute Scope 1, 2, and 3 GHG emissions by 100% by 2030, using 2017 as a base year. Furthermore, Castellum commits to reaching net-zero greenhouse gas emissions across their entire value chain by 2040.

Their near-term targets include a 46% reduction per square metre in Scope 1, 2, and 3 in-use operational GHG emissions of owned and leased buildings (covering downstream leased assets) by 2030, from a 2023 base year. They also aim to reduce upfront embodied Scope 3 GHG emissions of new buildings (capital goods) by 45.4% per square metre within the same timeframe, and Scope 3 GHG emissions from purchased goods and services by 51.6% per square metre by 2030. Castellum has also committed to installing no new fossil fuel equipment in its property portfolio from May 1, 2025.

Long-term targets include reducing Scope 1, 2, and 3 in-use operational GHG emissions of owned and leased buildings by 77.9% per square metre by 2040 (from a 2023 base year). Additionally, they plan to reduce upfront embodied Scope 3 GHG emissions of new buildings by 96.6% per square metre and all other Scope 3 GHG emissions by 97% per square metre by 2040.