Pocket director Marc Vlessing argued that affordable homes for key workers and private housing are not meeting the needs of first-time buyers in the capital.
He told Planning that policies for intermediate homes are currently "pulled in from everywhere", with no joined-up thinking on how to bring schemes forward.
The company has had three intermediate housing schemes with a total of 80 homes turned down but won on appeal in the past year. Vlessing maintained that a cultural change in local authorities must be encouraged.
"For a long time people have been working within a distinct structure of either providing social or private housing. We are saying there is a third way," he added.
Pocket has been in talks with the Greater London Authority (GLA) to deliver more intermediate homes. The GLA could not comment as Planning went to press.