On Friday, Waitrose also announced plans to expand its rapid delivery service through Deliveroo.
Dame Sharon, who has hired a clutch of senior executives to deliver the plan since she joined, said: "Part of the plan is we want to become a much more efficient and leaner business, and that is going to take a number of forms".
It also said it would halve food waste not just in its own operations by 2030 but across the entirety of its supply chain and would source all key raw materials in its own-brand products from sustainable or recycled sources by 2025. John Lewis is now a 60 per cent online retailer, it said, and it is aiming for Waitrose to reach the same level by 2025.
Waitrose is set to grow delivery capacity beyond 250,000 orders per week, up from 55,000 before the pandemic, to give customers greater convenience.
Last year, the company said it aimed to secure £100 million in annual savings.
John Lewis will retain its "Never Knowingly Undersold" price pledge, though it may be modified next year.
The company also said it is pushing forward with plans to expand into housing, highlighting that it has identified 20 potential sites which could be used for private housing.
"Waitrose and John Lewis are two of the country's most trusted brands and we'll offer the best products and customer service on the high street and online".
"We're creating new inspirational services for customers where strong ethical values and peace of mind matter, like reusing and recycling products, personal savings and rented housing".
Sharon White, chairman of the John Lewis Partnership, said the retail sector had seen "five years of change in the past five months" as a result of shifting shopping habits during the Covid-19 pandemic. "Our plans will firmly establish Waitrose and John Lewis as the go-to brands for customers that care about quality, value, and sustainability". But she stressed that today's plan would see the firm "thrive for the next century, as it has the last".