Your Building Site When Building a House: Duties, Safety, Process
As soon as the excavator moves in, your plot becomes a building site – with clear duties. As the builder you bear the duty to maintain safety, must organise site electricity and site water and secure the building site. This guide explains duties, safety, supply and the course of a site visit – with a checklist and notes on neighbour law.
As soon as the excavator moves in, your plot becomes a construction site – and thus a place with clear obligations. As the client you bear the duty to ensure safe access (Verkehrssicherungspflicht), must organise site power and site water and secure the site against unauthorised persons. Anyone who knows the most important rules avoids liability risks, trouble with neighbours and expensive delays. This guide explains your obligations, the securing of the site, the supply of power and water, and the sensible course of a site visit – with a practical checklist.
Pure information – not legal advice
This article informs generally about obligations and processes on a private construction site. It is not legal advice and does not replace information from the building authority, utility provider or a specialist. Specific requirements arise from the local regulations, the building contract and the conditions of your utility providers.
What obligations does the client have on the construction site?
Short answer: The client’s most important obligation is the duty to ensure safe access (Verkehrssicherungspflicht): you must ensure that no avoidable danger to others emanates from your construction site. This includes securing hazard spots such as open pits, scaffolding, trenches or material storage, making access more difficult for unauthorised persons and marking the site sufficiently. If someone is harmed because you have violated this duty, you can be liable. Even if you commission a specialist company, a basic responsibility for your plot remains with you. It is precisely this liability risk that the client’s liability insurance (Bauherrenhaftpflicht) covers.
How this insurance works, what it covers and what it does not, is explained by the guide to the client’s liability insurance. Also clarify in the building contract which safe-access duties the executing company takes on during its work – with a prefab house, for example, during the assembly phase. An overview of the individual construction phases is given by the guide to the house-building process.
Site sign and securing: what is necessary?
Short answer: Securing a construction site usually includes a site sign with the details of the building project and those involved, an effective barrier against unauthorised persons (such as a site fence) and the securing of individual hazard spots such as open pits, scaffolding and access ways. If the site projects into the public traffic space – for example through a material container or a crane on the pavement – a permit from the municipality and an additional traffic-law safeguard are usually necessary. The exact requirements depend on the local regulations; when in doubt, ask the building authority.
Typical securing elements of a private construction site
| Element | Purpose | Note |
|---|---|---|
| Site sign | marking, those involved, building project | requirements depend on the federal state/municipality |
| Site fence / barrier | protection against unauthorised persons and children | especially important in residential areas |
| Pit securing / lighting | fall and accident protection | cover/light open pits |
| Container/crane on pavement | storage, assembly | usually a special-use permit needed |
Site power and site water: how is the site supplied?
Short answer: For most construction work you need power and water on the site even before the actual assembly. Site power is supplied by a so-called site power distributor (Baustromkasten), which is applied for and connected via the grid operator or via an approved electrician. Site water is provided by the local water supplier via a provisional site water connection. You should organise both early – ideally weeks before construction starts – because registration, meter installation and connection take time. The costs arise as incidental building costs and vary depending on the region and effort.
Think of the cable connection at the same time
Besides power and water, also plan the later house connections for telecommunications and cable/fibre in good time. Because civil engineering, excavation and house-connection work often run in a coordinated way, it saves time and money to register the cable or fibre connection early with the provider and coordinate it with the remaining servicing work – a subsequent connection is usually more elaborate.
Site power and site water are among the servicing and incidental building costs that you should not forget in your calculation. How to assess your budget realistically overall is shown by the overview under how much house can I afford.
Plan assembly and servicing cleanly
Anyone who thinks of site power, site water and securing from the start loses no time during assembly. Compare suitable prefab-house manufacturers for free and clarify early which servicing and construction-site services are included in the offer.
Site visit: what should clients pay attention to?
Short answer: Regular site visits help to follow the progress and to spot deviations early. Pay attention to your own safety: sturdy footwear and a helmet are mandatory, enter the site only by arrangement and avoid the working area of running machines. Document the construction progress with photos, compare what has been built with the building specification and note anything conspicuous in writing. You should also record important arrangements with the site management. This way you have reliable evidence in the event of defects or a dispute.
- Wear sturdy footwear and a helmet, enter only by arrangement.
- Avoid the working area of running machines and cranes.
- Document construction progress with dated photos.
- Compare what has been built with the building specification and the contract.
- Record anything conspicuous and any arrangements in writing.
- Note the site management contact person and emergency contacts.
Whether what has been built corresponds to what was agreed is best checked against the reviewed building specification. A practical template for your walkthroughs can also be found in the checklists.
What must neighbours tolerate during construction?
Short answer: Neighbours must tolerate part of the impairments associated with a construction site – for example customary construction noise during the permitted times, dust or the temporary use of adjacent areas within the scope of statutory regulations such as the so-called hammer-blow and ladder right (Hammerschlags- und Leiterrecht), provided the respective state regulation provides for it. There are limits nonetheless: quiet hours, unreasonable permanent burdens or damage to the neighbouring plot need not be accepted. What applies in detail depends on the state-law neighbour regulations and the specific situation. Clarify boundary building and access early and by mutual agreement.
Which rights and obligations exist between neighbours during house building is deepened by the guide to neighbour law during house building. Precisely with a prefab house, the burden often concentrates on a few intensive days – how these unfold is shown by the guide to assembly day. An early, friendly conversation with the neighbours most effectively prevents conflicts. General background on emissions is provided by the definition of emissions (Immissionen).
Compare a prefab house with a clearly regulated assembly
With a prefab house, securing, servicing and assembly run in a tightly timed sequence. Compare suitable manufacturers for free and without obligation and have it shown which construction-site and servicing services are included in each case.
What does your dream house really cost?
Request suitable quotes from vetted manufacturers for free and compare the prices per square metre for your construction project.
Compare house prices nowImportant questions briefly explained
The most common price questions around Your Building Site When Building a House – answered concisely by the Prefabricated House editorial team (as of 2026).
