Housing allowance is a government subsidy for rent or the cost of owner-occupied housing. This subsidy is available to people with little income.
Under certain circumstances, you can have a claim to housing allowance as an unemployment benefit II recipient - namely if the housing allowance can end your need for assistance or the need for assistance of your entire community of need (possibly together with child supplement).
The goal of the Jobcenter is that you end your benefit receipt if possible. Therefore, you may be asked to check your entitlement to housing benefit.
You can apply for housing benefit at the city of Dortmund. For more information, please visit the website of the city of Dortmund.