Coastline has completed its fifth Streamlined Energy & Carbon Report (SECR).
We reported a total of 7370.12 tonnes of CO2 (equivalent) in 2025/26. This is an increase on the previous year; however, this can be attributed to improved data quality, meaning that we are more confident moving forward in benchmarking our emissions against others and against future emissions reporting.
Scope 1 Emissions
Our Scope 1 emissions for 2025/26 were 507.15 tonnes CO2e, compared to 562.14 in 2024/25, a 54.99 tonnes CO2e decrease. The main decrease here being in our emissions from combustion of gas used in our offices, communal areas and heat networks, which has decreased from 357.57 tonnes CO2e to 244.99 tonnes CO2e. This is due to continued efforts to improve our office heating system, along with the change our understanding of the definition of a communal heat network.
Scope 2 Emissions
Scope 2 emissions have seen a slight increase but remain largely consistent with the previous year.
Scope 3 Emissions
Scope 3 emissions have seen an 819.65 tonne CO2e increase in the last year, primarily from the emissions attributed to our homes. This has seen an increase from 5810.32 tonnes CO2e to 6623.98 tonnes CO2e (an 11% increase), which equates to 1.41 tonnes CO2 per Coastline home. These changes have occurred due to the increased data quality of our assets, with a data cleansing exercise completed to accurately record attributes in our third-party software Parity, and the carbon emissions element is now calculated using actual data rather than assumed logic (where data was previously outdated or unknown). While seeing such a large increase, this does provide Coastline with reassurance that data quality is improving and allows us to more accurately assess our properties, including where retrofits are needed and the expected lifespans of attributes as well as the associated costs.
Energy Efficiency Actions
Coastline continues drive environmental improvements, such as carbon emissions reduction, improving the efficiency of our office building, reviewing our utilities procurement, and actively engaging with our colleagues and customers, in line with the Environmental Strategy.
During 2025/26 these improvements included:
- The development of the Scope 1 & 2 carbon reduction plan;
- The completion of 315 retrofits under ECO4 funding;
- The creation of the Environmental & Sustainability Steering Group for colleagues;
- An increased focus on social value, especially in procurement practices;
- Reviewing the utilities contracts and opportunities to improve the services our customers receive;
- Working closely with suppliers and contractors such as Bradfords and Biffa;
- Engaging with our customers in a range of methods, including in workshops, Community Collaboration Sessions, and through improvements to our websites.
The Energy Company Obligation, Phase 4 (ECO4) funding allowed us to complete retrofit works to 315 homes, which included solar PV installations, and where necessary:
- Upgrades to heating systems;
- Insulation top-ups; and
- Ventilation upgrades.