Former PM Liz Truss had cast doubt on the aim, saying she would scrap 'Stalinist' housing targets.
Asked about Ms Truss's past comments on housing targets, Mr Gove said: "The top-down housing targets that... Liz was referring to are part of a broader and different calculation from the 300,000 in the manifesto.
During the interview on Sunday with Laura Kuenssberg, Mr Gove also avoided saying whether the government would raise benefits in line with inflation. The UK is experiencing what many have described as a housing crisis, with millions living in sub-standard conditions and long waiting lists for council houses.In 2017, then-chancellor Mr Hammond set the target of building 300,000 homes a year by the mid-2020s and the party recommitted to the aim in its 2019 manifesto.