Site Manager
Construction-site supervision per state building codes (LBO), SiGeKo role per BaustellV, DGUV-compliant safety briefings, as-built documentation. Named on the building permit.
LBO · BaustellV · DGUV
Talk to us about Site Manager
Three lines and you are in our inbox. We reply within one business day.
What is a Construction Site Manager under German Law?
The German construction site manager, Bauleiter, is the central supervisory role on the construction site and carries a public-law function under the state building codes. The model provision is § 56 of the Musterbauordnung (MBO): the Bauleiter must watch over the works being carried out in line with public-law requirements and issue the instructions needed for that, attending to the safe technical operation of the site and in particular to the hazard-free interlocking of the contractors' works; their own responsibility remains untouched. Numbering differs by federal state, with Baden-Württemberg placing the Bauleiter in § 45 LBO. Bavaria does not carry the role at all: Art. 50 Para. 1 BayBO refers only to the designer (Art. 51) and the contractor (Art. 52).
The Bauleiter must be distinguished from the Safety and Health Coordinator (SiGeKo) under the German Construction Site Ordinance (Baustellenverordnung, BaustellV). Under § 3 Para. 1 BaustellV a coordinator is required for every site where employees of more than one employer are active; the thresholds of 30 working days with more than 20 workers, or 500 person-days, do not trigger that appointment but the advance notice under § 2 Para. 2 BaustellV. RAB 30 details the coordinator's suitability. The Bauleiter supervises proper construction execution towards the building authority, while the SiGeKo coordinates occupational safety across contractors.
In practice, the Bauleiter performs concrete tasks: checking execution documents against the building permit, attending critical construction phases, instructing contractors, maintaining the construction logbook, supervising acceptances and quantity surveys, obtaining the authority's orders on barriers and signing for the work site under § 45 Para. 6 StVO, and documenting defects. Instructing the workforce remains the employer's duty under § 12 ArbSchG; § 13 Para. 1 No. 4 ArbSchG extends responsibility to persons charged with running an operation, within their assigned tasks and powers. VOB/B § 4 requires the client to be told who represents the contractor in running the works.
The role stands or falls on the construction logbook. It records weather, headcount, deliveries, instructions and disruptions, and in a dispute over build time or defects it is the evidence both sides fall back on; entries written up afterwards lose exactly that value. Inspections keep turning up the same points: a change of Bauleiter never notified although § 53 Para. 1 sentence 5 MBO requires it without delay, and fall protection under § 9 DGUV Vorschrift 38 ordered but never checked on site.
Duties of the construction site manager
- Supervise execution against the building permit, approved structural calculations and public-law requirements under § 56 Para. 1 MBO and the matching state provision.
- Maintain the construction logbook covering weather, headcount, deliveries, instructions and incidents as evidence in dispute.
- Attend to the hazard-free interlocking of the contractors' works and interface with the SiGeKo under § 3 BaustellV without role overlap.
- Obtain and follow the authority's orders on barriers and signing for the work site under § 45 Para. 6 StVO, and observe the general safety duty (§ 823 BGB).
- Issue the instructions needed for compliance with public-law requirements under § 56 Para. 1 MBO; instructing the workforce stays the duty of each employer under § 12 ArbSchG.
- Verify fall protection under § 9 DGUV Vorschrift 38 (above 1.00 m at stair flights, wall openings and traffic routes, above 2.00 m otherwise) and TRBS 2121.
- Run quantity surveys, check progress invoices under VOB/B § 14.
- Attend client meetings, formal acceptances under VOB/B § 12 and regulatory inspections.
- Order immediate measures including site stoppage in case of imminent danger.
- Archive all building-authority-relevant records beyond the five-year limitation for structures under § 634a Para. 1 No. 2 BGB.
Appointment and qualification
Under § 53 Para. 1 sentence 1 MBO the owner must appoint suitable participants for a project that is not procedure-free, unless the owner is personally suited to meet those obligations. For the Bauleiter an express form requirement applies on top: § 53 Para. 1 sentence 5 MBO requires the owner to notify the building authority in writing of the Bauleiter's name before construction starts, and of any change of that person during execution without delay. The state building codes implement this with their own numbering, Baden-Württemberg through § 45 LBO. Bavaria carries no building-law Bauleiter at all; Art. 50 Para. 1 BayBO refers only to the designer and the contractor. Where no appointment is made, the duties stay with the owner.
Qualification is governed by § 56 Para. 2 MBO: the Bauleiter must have the expertise and experience required for the task. Where that expertise is missing in particular fields, suitable specialist site managers (Fachbauleiter) must be brought in and step into the Bauleiter's place for those fields, with the Bauleiter aligning their work with their own. The MBO contains no nationwide mapping of building classes to formal qualifications; the states regulate the detail differently. Liability follows several tracks: civil under works contract (§§ 631 ff. BGB) and general safety duty (§ 823 BGB), administrative under the state building codes (in Bavaria a fine up to 500,000 EUR under Art. 79 Para. 1 BayBO), criminal under § 319 StGB construction endangerment with imprisonment up to five years, and § 222 StGB negligent homicide. Daily rates for external Bauleiter range from 700 to 1,400 EUR, hourly rates from 80 to 350 EUR depending on building category.
- The project is not procedure-free under the state building code and needs a building permit (standard case).
- Special building under § 51 MBO in conjunction with § 2 Para. 4 MBO, such as assembly venue, hospital or high-rise.
- Change of Bauleiter during ongoing construction, with the notification duty under § 53 Para. 1 sentence 5 MBO.
- Construction affecting public traffic, with orders from the competent authority under § 45 Para. 6 StVO.
- Site with employees of more than one employer, which also triggers SiGeKo appointment under § 3 Para. 1 BaustellV.
- Project with heritage protection or special public-law conditions.
Typical construction projects
- Residential construction from building class 3 (multi-family and terraced houses).
- Commercial and industrial construction with halls, storage and production.
- Office and administration buildings above the permit threshold.
- Hotels, hospitals and care facilities as special buildings.
- Schools, daycares and universities for the public sector.
- Civil engineering, road and utility construction with traffic safety duty.
- Underground garages, parking decks and assembly venues.
- Renovation and conversion of existing buildings requiring permit.
- High-bay warehouses and logistics centres with fire protection conditions.
- Photovoltaic ground-mounted plants and wind turbines as special buildings.
How CIVAC supports the construction site manager
CIVAC delivers a Bauleiter appointment register that documents the written appointment under LBO §§ 56-59 with full version control, archives the qualification proof (chamber registration, submission rights) and triggers the notification to the building authority. Each project gets a digital construction logbook with geo-tag, weather pull and photo evidence that holds up under § 286 ZPO as evidence.
The workspace covers the demarcation to the SiGeKo under BaustellV §§ 2-5 through separated roles, hosts RAB 30 templates and runs the traffic safety checklist under § 32 StVO. Defects are captured with deadline and photo, subcontractor instructions are stored tamper-proof, acceptances under VOB/B § 12 are protocolled. An automatic retention timer keeps records available beyond the five years required by § 634a BGB.
Frequently asked questions
Need this officer role for your organisation?
Appoint our experts as your external officer or license CIVAC for your in-house team. Get in touch and we walk you through the right setup.