In 2025, we achieved our first A rating in our CDP disclosure for Climate and an A- in Water Security.
Earning an A rating – the highest score – highlights CDP’s recognition of our leadership in corporate transparency and performance on climate, securing a place on CDP’s respected annual ‘A’ list, placing us among the top 4% of companies scored by CDP in 2025.
CDP’s scoring draws on a rigorous and independent methodology, aligned with the TCFD framework. It evaluates companies’ depth of reporting, understanding of environmental risks, and evidence of best practice - including ambitious target-setting and verified action. CDP maintains the world’s largest repository of environmental information and is widely relied on to guide investment and procurement decisions that support a net-zero, sustainable and earth-positive global economy.
This milestone represents significant effort across Kier to enhance our climate management, reduce our emissions and work towards our net zero targets.
Our FY25 Milestones – Climate
Increased use of HVO as an alternative to diesel
Options such as Hydrotreated Vegetable Oil (HVO) can reduce our reliance on traditional bulk fuels, offer emissions reductions, and support our journey towards net zero. Through the Supply Chain Sustainability School, we contributed towards the development and publication of a report supporting the sourcing of sustainable hydrotreated vegetable oil (‘HVO’), delivering carbon savings whilst minimising nature related and other sustainability risks. Using this knowledge, we entered a partnership with our fuel supplier to meet our due diligence requirements to replace diesel with sustainable HVO where possible across our operations. As a result of this, during the FY25 reporting period, we have avoided 4,608 tCO2e across our operations. Read more on page 163-4 and 230 of our CDP disclosure.
Trialling Green Hydrogen and Solar Power at Bridgwater Tidal Barrier
In partnership with the Environment Agency, we are trialling a zero-emission power solution, combining solar panels, green hydrogen fuel cells, and batteries to power our site compound. Between January and April 2025, the system supplied 16,047 kWh avoiding an estimated 20,000 litres of diesel and 53 tCO₂e. Read more on pages 164-6 of our CDP Disclosure.
PAS 2080
We achieved PAS 2080 certification for our Construction and Infrastructure Services divisions. This helps ensure we apply a best-practice lifecycle approach throughout design and delivery of our projects. We also continue to monitor the proportion of our revenue aligned to a green taxonomy, aiming to maintain a minimum green alignment of 50%. This response serves both to mitigate the risk of failing to meet the increasing requirements of our clients and to realise opportunities in expanding markets that address climate, water, and forest sustainability. You can read more about this on page 135-8 of our CDP disclosure.
Internal Carbon Pricing Trial
We have been trialling our shadow carbon price within our NRNN division. This is a key initiative to enable us to continue to work towards our SBTi verified 2045 net zero target. All decisions that have an impact on scope 1,2 and purchased goods and services will include a scenario model to estimate emissions and produce a carbon cost in £/tCO2e. Read more on pages 169-71 of our CDP Disclosure.
Quantification of climate risks
During FY25, we quantified the climate risk potential for carbon taxes as part of our risk and opportunity identification and assessment. We also were separately able to report on R&D associated with sustainability.
Quantifying risks and opportunities allow us to better respond and mitigate emerging considerations as we continue to develop and deliver our carbon reduction plans. Read more on page 39-40 of our CDP disclosure.
Our FY25 Milestones – Water
Sustainable Drainage Systems (SuDS)
We’ve been involved in several sustainable drainage systems (SuDS) projects in recent years, including a large-scale project with Severn Trent water in Mansfield. This was one the largest retrofit SuDS in the UK, reducing flood risk for 90,000 people by creating 30 million litres of surface water storage, enhancing amenity species for residents and boosting biodiversity for wildlife. You can read more about the project here and on page 364 of our CDP Disclosure.
Targets and Accounting
You can read more about our water targets and their alignment with relevant frameworks such as Planetary Boundaries and the UN Sustainable Development Goals (SDGs) on pages 367-70. Find our water accounting data on pages 330-342 of our CDP Disclosure.
Risk Assessment
In FY25, we calculated and reported on the percentage of water usage within areas of higher water stress using UK based water scarcity and stress indicators from the EA and Water Resource Zones. This enabled us to better understand our interactions with nature and water, as well as our exposure to water scarcity risks. You can read more about our approach to this on page 333-4 of our CDP disclosure.
What we are prioritising next
- Electrifying our fleet – we’ve committed to transition 100% of vehicles up to 3.5t and 50% of vehicles between 3.5 and 7t to electric by 2030*
- Focusing on early grid connections to support our carbon goals and reduce scope 1 emissions.
- Improving and digitising data and enhancing surface water management controls.
- Electric here means battery electric vehicles, plug-in hybrid vehicles (PHEV), fuel cell vehicles, and extended range vehicles.