Permissible roof pitch on the 3rd and 4th gable?

It's not about space at first. It's actually about our personal taste, which, as is well known, is not up for debate.

Currently, a cheek gable is planned with the same roof pitch as the main roof (47 degrees). We prefer more of a so-called front spike - meaning the eaves are at the same height as those of the main roof.

Roof pitch of the main building

Then you deviate from the specifications of the development plan (What roof pitch does your current plan have?). Since your ideas obviously leave no room for design flexibility, a building inquiry with an attached exemption application is recommended. This way you have a legally secure decision on whether your ideas are approvable without risking the full costs of the approval planning and fees in case of rejection.

I have an appointment with the architect on Monday. He will know.

Yes, if he is experienced and familiar with the customs of the local authority. Otherwise, be careful with the contract wording!