The Danish turbine manufacturer has filed a 'proposal of application notice' with Edinburgh City Council for the facility at nearby Leith.
The selection of the Scottish port for the facility was reported by subscriber-only reNEWS on 21 December 2023.
The factory would produce blades for the V236 offshore turbine, it is understood.
"The UK’s offshore wind sector has strong potential, and Vestas has identified the Port of Leith as a possible location for a wind turbine blade manufacturing facility," said a spokesperson.
"A final investment decision has not been made and will be based on several factors including the viability of the business case and the market outlook."
A full planning application will be required to secure permission for the facility east of the Imperial Dock.
Industry sources said if built the facility would be a significant investment in the UK supply chain.
A factory of this kind would support hundreds of jobs, they added.
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