Energy 路 United Kingdom

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

Coast path diversion adjacent to Sizewell C
Simon MortimerCC BY-SA 2.0

Cost evidence

Basis of the published figure

Approved budget2024
world-nuclear-news.org

Project metrics

Key dimensions

PowerWorld Nuclear News
3,200 MW

Project record

Construction started

sizewellc.com

2023

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