Brent Cross is set to double in size as it attempts to rival Westfield.
£1.4 billion is to be invested in a total modernisation, which will be completed by 2022.
It has sparked a new rivalry, with the malls to be competing for business. Both trying to secure the best shops, and more customers.
Mike McGuinness, Hammerson’s development director for the site, said: “By 2022 Westfield London will be 14 years old and Westfield Stratford City 10 years old.
“We take the view that Brent Cross was the number one centre in 1976 and we feel we would like to make it number one again in a new era.”
An exhibition on the proposals for residents and shoppers runs from November 3 to 8, ahead of a detailed planning application to Barnet council next spring.