ᐅ When is the project typically handed over from the architect to the general contractor (after which project phase)?

Hello everyone,

We are currently planning our house together with an architect. However, we do not want to contract individual trades through the architect later on; instead, we plan to build a nearly turnkey house with a general contractor (GC). We decided to work with an architect for the initial planning because the overall quality of planning from GCs generally seemed too low and superficial to us.

Now, we are wondering when the right time is to hand over the further execution to a GC.

After design phase 3 (preliminary design)?
After design phase 4 (permit planning / building permit planning)?
After design phase 5 (detailed design)?

We will not subcontract all trades to the GC but plan to do some interior work ourselves or assign it to long-term trusted craftsmen.

Thank you very much for your advice and tips!
ufr123