Child building allowance, which deadline counts?

Hello everyone,

We are expecting our building permit this month (currently one child, not eligible for BKG due to earning 1k too much). The house will be erected in November (prefabricated house) and then we will have 2 children (birth expected in August) and will now also be eligible for BKG. I would then register ourselves at the address directly, even if some things are not finished yet. Is this possible or legally critical, since we will probably not move in until 3 months later? One more question, whether the eligibility for BKG is based on the date of the building permit or the registration? Additionally, whether the move-in or registration must necessarily take place by the end of the year to be eligible. Unfortunately, I have not found any real answers on the internet.

Thanks to you all in advance.

Regards
Zenjamino

One more question, whether the date of the building permit or the registration applies for the entitlement of the BKG?

I would say the time of the application, but I'm not sure.

Additionally the question whether the move-in or registration necessarily has to take place by the end of the year to be entitled.

As far as I know, only the building permit has to be granted this year.

One more question, whether the date of the building permit or the date of registration applies for the eligibility of the BKG? Additionally, the question of whether moving in or registration necessarily has to take place by the end of the year to be eligible.

The building permit must have been granted by the end of 2020. You can move in later.

Building permit until the end of 2020, moving in and application for new construction until the end of 2023. However, it is on a "first come, first served" basis...

The building permit must be granted this year. Then the application must be submitted within a maximum of 6 months after moving in. The decisive factor is the salary from the penultimate year. According to current projections, everyone who still received the building permit this year will also receive the grant.