The new 'mosque closure orders' would give the government widespread powers to close down any premises which are either run by, or welcome, extremist speakers.
May said she would also introduce new banning orders against extremist groups, review the sharia court system and introduce new "extremism disruption orders" against individual extremists.
In a decidedly neo-Conservative speech, May channeled the language of George Bush, saying the nation faced a new battle between "them and us".
"For too long we have let the extremists define the 'them and us'," she told a press conference in central London.
"We, the 'us' will form a new partnership and show 'them' that we want nothing to do with their hatred bigotry and ignorance."
Those refusing to join this new alliance would feel the full force of the law, she said.
"To those people who do not want to join this partnership. To those people who choose consciously to reject our values, the message is equally clear.
"The game is up. We will no longer tolerate your behaviour. We will expose your hateful beliefs for what they are.
"Where you seek to spread hate, we will disrupt you. Where you break the law we will prosecute you. Where you seek to divide us we will stand united and together we will defeat you."
Politics.co.uk