Current energy consultant costs

Hello, We are also planning a single-family house with a basement in solid construction and a granny flat, as it is a slight hillside plot. May I ask which brick you plan to use to meet the KFW standards? Background: I actually want to avoid external insulation and internally insulated bricks (e.g. Poroton T7) and according to my architect this can only be solved with the T8 (50cm wall thickness). Which actually makes the KFW subsidy relatively unattractive to me. Thanks in advance