Building control

All installations within the scope of the Hessian Building Code must be arranged, erected, modified and maintained in such a way that public safety and order, in particular life, health or the natural foundations of life, are not endangered.
This obligation is first and foremost incumbent on the owner of the property or facility or the user.

The other "parties involved in the construction", such as planners, construction managers, executors and persons authorised to provide evidence or experts, also have various monitoring obligations during the planning and construction period.
Authorised inspectors and experts have to issue proofs or certificates and submit them to the building supervisory authority.

The building supervisory authority checks compliance with the regulations and requirements under public law as well as the fulfilment of the obligations of those involved in the construction at its own discretion depending on the degree of difficulty and the importance of the installation. In the case of special buildings, recurring safety inspections are usually ordered in the building permit at specific intervals, insofar as these do not already result from special building regulations.

Inspections
The tasks of the building supervisory authority also include the detection of illegal building activities and uses, i.e. measures for which the required building permit has not been applied for or has not yet been granted. Before the building supervisory authority takes repressive action, it will first request building documents in order to be able to check the material permissibility of the project. This does not apply in cases of imminent danger.
These "black buildings" are identified on the basis of own research, but also on information from other offices, authorities or neighbours.