We are currently in talks with a developer for a semi-detached house and also want an extensive KNX installation. I want to take over the programming, the other electrical installation should be done by his electrician (but outside the contract with the developer). For the loan, it is usually possible to count own work as additional equity. How high would/could the programming effort be estimated? We have a total of 16 rooms (including halls/bathrooms/basement rooms etc.), all of which are planned with window contacts, presence detectors, and connection of lighting, roller shutters, and heating controls via KNX. Would the electrician have to specify the programming effort in the offer? Are there flat rates that can be applied for this?