The jacket foundations and the piles are being built jointly by the Navantia-Windar consortium which won the contract to deliver 42 jackets and 126 piles for the project. The majority of work is being executed at the Navantia facility in Fene, with the piles being constructed by Windar at its facilities in Avilés.
The remaining jackets and piles are expected to be delivered over the following months, Navantia said.
Navantia will also build the offshore substation for East Anglia One.
The remaining 60 foundations and pinpiles are being produced by Lamprell at its Jebel Ali and Sharjah yards in the UAE.
The foundations will be installed by Seajacks and Van Oord, with the main installation vessel being Seajacks Scylla.
Located 43km off the Suffolk Coast in the southern North Sea, East Anglia One will consist of 102 Siemens 7MW wind turbines scheduled to be fully commissioned in 2020.