The three hotels to be redeveloped are the Holiday Inn London Kensington-Forum, Holiday Inn London-Bloomsbury and Holiday Inn London Regent’s Park.
The project will refurbish the meeting facilities and breakout spaces of the three properties, as well as upgrading their wi-fi capabilities.
Paul Harnedy, director of operations for IHG’s portfolio of Company Managed Hotels in London, said: "The meetings industry has changed dramatically over the last few years, with delegates wanting to feel less restricted and more creative.
"Developments in technology mean that meeting styles have changed and we are continually aiming to improve our standards and ensure we remain innovative in responding to evolving business guest needs."
The newly refurbished meeting spaces are expected to reopen later this month (March).