Green Party co-leader Sian Berry will run for London Mayor in the 2020 elections, it has been announced.
Ms Berry, who has twice before stood for the job, pledged to give people who live in the capital a say on land use.
In a speech in Bermondsey, Ms Berry said the Greens are the only party Londoners can trust to deliver on their promises to tackle the housing crisis.
She said: “The Green Party has a proud history of getting results for London. When we make Londoners a promise, we deliver, and have made real changes even when we are not mayor.
“In 2016 we promised to give power to residents whose homes faced demolition, and we delivered on that promise. Now we pledge to give Londoners a say on land use in their city.
“London Greens listen to what Londoners need and we act on it. That’s why we believe everyone in London should have an affordable, secure and warm home.
“But across the capital, empty buildings like office blocks and car parks are left unused, while Londoners struggle to pay the rent or wait for years to get social housing.
“That isn’t right, and we have to start planning now for how we bring these underused spaces and empty land back into use.
“A Green Mayor would give Londoners control over how our city develops to provide the homes we need with a People’s Land Bank, which would empower communities to find land and buildings currently going to waste and choose how to bring it back into use.
“The Green Party has the answers to London’s biggest problems and we’re the only party Londoners can trust to deliver on its promises.”
Ms Berry came third in the race to become Mayor of London in 2016 and was elected a London Assembly Member the same year. She has been a Camden councillor since 2014.