What is the approved budget of Sizewell C nuclear power station?
Sizewell C is a two-unit EPR nuclear power station of 3.2 GW planned on the Suffolk coast in England next to Sizewell B, expected to supply the equivalent of six million homes for at least 60 years. The project reached its final investment decision on 22 July 2025, with the UK government taking a 44.9% stake alongside La Caisse, Centrica, Amber Infrastructure and EDF, debt from the National Wealth Fund and a regulated asset base model. The project company states a capital cost of around GBP 38 billion in 2024 prices, about 20 percent less per unit of capacity than Hinkley Point C, and site preparation began in 2023.
Approved budget
拢38 billion
Approximately $48.57 billion
Cost basis: 2024
Cost evidence
Basis of the published figure
Project metrics
Key dimensions
- PowerWorld Nuclear News
- 3,200 MW
Project record
Construction started
sizewellc.com2023