The UK's consenting authority, the Planning Inspectorate, had already recommended in September that Davey grant consent to the project.
Hornsea 1 is part of the 4GW Hornsea concession that was awarded to Smart Wind in 2010 in the Round 3 tender. Smart Wind is made up of Siemens, Dong Energy and Mainstream Renewable Power.
The project can now proceed with construction, although this is still dependent on the final investment decision being made. An online date of 2019 has been proposed.
The 1.2GW Hornsea 1 will be made up of two projects, the Heron Wind and Njord. By 2024 a further 1.8GW is expected to be developed out of the 4GW Hornsea block.
The Hornsea zone covers 407 kilometres and is located 103 kilometres off the Yorkshire coast.
Hornsea 1 has been proposed as a 332-turbine project. While a turbine supplier has not been selected, the number of turbines and capacity imply a 3.6MW turbine.