The country's biggest commercial real estate company is the latest employer to agree to pay the voluntary living wage, which is higher than the government figure.
Land Securities will pay permanent staff or contractors the hourly rate of £9.75 in London and £8.45 elsewhere, by 2020, both more than the statutory figure of £7.50 for over 25-year-olds.
Diana Breeze, group human resources director at Land Securities, said: "Implementing the living wage across our business by 2020 is the right thing to do as a responsible employer.
"Not only does it benefit our employees but also the communities they live, shop and work in."
Katherine Chapman, director of the Living Wage Foundation, which accredits firms paying the higher rate, said: "As a FTSE 100 and the UK's largest commercial property company, Land Securities' commitment to the Living Wage shows great leadership.
"There are now over 3,000 UK employers who are signing up to pay a real Living Wage to make sure all their staff earn enough for a decent quality of life."