At least £2.3 billion will be needed just to decarbonize buildings owned by Welsh councils, according to a spending watchdog report that warns the public sector is unlikely to meet its collective net zero ambitions by 2030. Audit Wales found that financial strains and shifting political priorities have pushed carbon reduction down the agenda since 2022.
Funding Shortfalls Delay Council Climate Goals
Public bodies across Wales acknowledge the importance of decarbonizing their operations, but day-to-day fiscal realities get in the way. Organizations report that overall budget constraints make it difficult to invest in green infrastructure. Audit Wales noted that since a climate emergency was declared in 2019, decarbonization has become a lower priority for public bodies.
Since 2022, financial and political pressures have caused decarbonisation to fall down the priority list.
Audit Wales
The watchdog criticized the Welsh government for not defining the collective ambition
for net zero by 2030 as a “target,” noting an absence of penalties or incentives to drive compliance. That lack of enforcement creates uncertainty among public organizations regarding the level of priority to assign to carbon reduction.
Estimating Transition Costs Proves Difficult for Public Bodies
Estimating the long-term cost of the transition has proven difficult. Audit Wales found that public bodies have made limited progress in calculating near-term or long-term expenses, with some organizations labeling projected costs as unaffordable.

The £2.3 billion figure covers council-owned buildings alone and does not represent the total cost of decarbonizing the entire public sector, which would also involve other buildings, transport, procurement and services. Competing demands to fund education, social care, health and other frontline provision further complicate long-term financial planning.
Data Gaps Force Reliance on Consultants
Measuring progress creates a significant hurdle. Even though a greater number of entities now take part in the carbon-emissions reporting system managed by the Welsh Government, total recorded emissions have gone up; however, the watchdog warns against interpreting this simply as an equivalent rise in pollution, because wider reporting coverage alters the numbers. Auditors also pointed to persistent gaps in expertise, forcing many public bodies to rely on external support.

Ann-Marie Harkin, who serves as Audit Wales’ Executive Director for Audit Delivery, pointed out that while isolated success stories do exist, the general speed of transformation falls short, observing that the original vision was for the public sector to set an example and inspire wider changes throughout the economy and society.
We can list positive examples, but not enough progress has been made overall, and we owe it to future generations to do better.
Ann-Marie Harkin, Audit Wales’ Executive Director for Audit Delivery
She also added that Wales must play its full part in addressing these challenges.
Wales is not alone in facing these issues but must play its full part.
Ann-Marie Harkin, Audit Wales’ Executive Director for Audit Delivery
Government Defends Net Zero Ambitions
The Welsh government defended its approach, maintaining that a net zero public sector remains a priority intended to lower emissions, cut energy bills, and strengthen energy security.
A net zero public sector is a priority for Welsh government.
Welsh government spokesperson
The 2030 ambition, introduced by the then-Labour Welsh government in 2017, was designed as a shared direction of travel rather than a requirement for every public body to reach net zero individually by 2030. At the same time, the objective of the current Plaid Cymru administration is to see all of Wales achieve net zero by 2040, a full decade ahead of the present legally binding schedule for both Wales and the UK.