The retailer has signed to Bericote Properties Crossdox scheme close to the M25 motorway.
The developer has lodged a planning application with the London Borough of Bexley for the industrial park, which has the potential for up to 600,000 sq ft.
In a vision statement to accompany the planning application, Ocado says the customer fulfilment centre will fulfil 200,000 orders per week and create 3,500 jobs.
Bericote is expected to tie up a £120m funding deal for the scheme in the next few weeks.
The distribution centre will sit next to a Tesco dotcom facility that Bericote built for Tesco last year.
Dowley Turner Real Estate and JLL acted for Bericote. Colliers represented Ocado. All parties declined to comment.
By Richard Williams