Offshore Transmission: Cost assessment for the Hornsea Project Two transmission assets

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This document sets out the assessment of costs which ought to have been incurred in connection with the development and construction of the transmission assets for Hornsea Project Two and details the cost assessment process we have undertaken.

Main document

[Cost Assessment for the Hornsea Project Two Offshore Windfarm Transmission Assets [PDF, 428.58KB]

](https://www.ofgem.gov.uk/sites/default/files/2023-07/2300714%20Hornsea%20CAR%20Final%20.pdf)

Subsidiary documents

[Appendix 2: Hornsea Two initial transfer value letter [PDF, 165.79KB]

](https://www.ofgem.gov.uk/sites/default/files/2023-07/Hornsea%202%20Initial%20Transfer%20Value%20%28Signed%29.pdf)

[Appendix 4: Grant Thornton ex-ante review [PDF, 1.21MB]

](https://www.ofgem.gov.uk/sites/default/files/2023-07/Hornsea%20Project%20Two%20Offshore%20Wind%20Farm%20Transmission%20Assets%20Ex%20Ante%20Review%20dated%2014%20April%202022%20-%20non-confidential.pdf)

[Appendix 5: Grant Thornton ex-post review [PDF, 791.85KB]

](https://www.ofgem.gov.uk/sites/default/files/2023-07/Hornsea_Two_Offshore_Wind_Farm_Transmission_Assets_Ex_Post_Review_dated_23_December_2022%20-%20Non%20confidential%20report.pdf)

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