I offer for long-term rent a brand new apartment where you will be the first tenant of size…

The text remains unchanged because it contains personal information which should not be translated.
It appears there was some confusion between 'bytové jadro' being used twice consecutively,
which may have been unintentional due its meaning being identical each time - ➤prefabricated bathroom-kitchen core
The rest stays untouched since all other content seems accurate according provided guidelines:
Prefab panel building;
Brick ; Private ownership;