There are rules about how big and expensive the apartment may be including utilities costs, which is paid to you from the job center, if you have an recognized status:
household sizeMaximum size of the apartmentRent and utilities (without electricity)Heating costs per square meter (sqm) 1 Person50 sqm477,40€
1,69€ (maximum 84,50€)
2 Persons60 sqm578,60€1,69€ (maximum 101,40€) 3 Persons75 sqm688,60€1,69€ (maximum 126,75€) 4 Persons85 sqm803,00€1,69€ (maximum 143,65€) 5 Persons95 sqm917,40€1,69€ (maximum 160,55€) Each additional person10 sqm111,10€1,69€ (maximum 16,90€)