Authority for urban development and housing

Construction site notice

You must notify the authority for urban development and housing, office for building regulations and building construction (ABH 33) of construction sites of a certain size at least two weeks before they are set up.

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Detailed description

Construction sites of a certain size must be announced to the authority for urban development and housing, office for building regulations and structural engineering (ABH 33) at least two weeks before they are set up.



Advance notice is required whenever:

  • the expected duration of the work is more than 30 working days and more than 20 employees are working on the construction site at the same time, or
  • the scope of the work is expected to exceed 500 man-days (number of workers times number of working days).
 

Information

Prerequisites

not specified

Documents required

Evidence for online registration

Please note

Construction sites of a certain size must be announced to the authority for urban development and housing, office for building regulations and structural engineering (ABH 33) at least two weeks before they are set up.

Advance notice is required whenever:

  • the expected duration of the work is more than 30 working days and more than 20 employees are working on the construction site at the same time, or
  • the scope of the work is expected to exceed 500 man-days (number of workers times number of working days).

Deadlines

no later than two weeks before the construction site is set up

Procedure

You can use this online service to view the construction site advance notice data

  • pre-record and then checked by the builder or those responsible within the meaning of Section 4 of the Construction Site Ordinance (BaustellV) and then sent electronically to the Authority for Urban Development and Housing (BSW).
    or
  • record it directly and send it electronically to the authority for urban development and housing (BSW) on behalf of the client or those responsible within the meaning of Section 4 of the Construction Site Ordinance (BaustellV).

Processing time

not specified

Fees

none

Legal basis

§ 2 (2) Construction Site Ordinance (BaustellV)

Address and contact information

Authority for urban development and housing

Office for building regulations
construction technology, structural engineering and building technology

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Keywords: Advance notice of a construction site construction site Construction site announcement

Last updated: 16.02.2026