If problems in planning are the reason that houses are not being built, then the Govt's move to reform planning rules should contribute to ameliorating England's housing crisis...
But if the real problem is a market controlled by big developers, keen to keep prices high (by building new stock slowly), then it will have no major impact.
But in reality, these will be mostly the 'wrong' houses - the real issue continues to be the lack of social housing being built!