Construction financing - duration of land purchase / house construction

Hello everyone,

as it currently looks, we have the opportunity to buy a property in January 2018. However, it can only be built on starting January 2019. (It will still be developed by the owner beforehand, as several properties will be created there.)
We have already decided on a developer.

Since we are still quite new to the whole topic, a few questions come up.

How does it work with the interest (commitment interest?) during that time?
We would like to finance the land and house together. Is that possible even if there is a longer period in between?

We have appointments again next week with the bank and also with the developer, but maybe there are a few helpful tips here?

Thank you very much and have a nice evening.

I solved the almost identical situation with a variable bridging loan. Not least because the exact construction costs are not yet precisely determined and, of course, because of the commitment interest. Some banks do this with a land charge, which is then redeemed later. That just costs the fees. A few, especially regional branch banks, also offer this without a land charge for very little interest surcharge. That makes it flexible. I recently signed the latter and can switch at any time and also have no coordination problems due to the land charge entries.