Prefab House Assembly: Narrow Access and Crane Setup Area
A prefab house is built in one day – if the low-loader and crane can reach the plot. This guide explains which requirements the access and crane setup area must meet and how module sizes influence transport. It shows typical obstacles with solutions and what the manufacturer checks in advance on an on-site appointment. That way you plan the assembly safely and avoid expensive additional costs.
A prefabricated house (Fertighaus) goes up in a single day – provided the low-loader and crane can actually reach the plot. This is exactly where some beautiful building plans fall apart: a narrow access road, a tight turning area, low-hanging power lines or ground that cannot bear the weight of the crane. Anyone who checks early on how the wall elements or room modules will be delivered and lifted into place avoids nasty surprises. This guide explains what matters when it comes to access, crane standing area and transport, and what the manufacturer checks in advance.
Short answer: For the assembly, the access route must be wide and load-bearing enough for a low-loader and a mobile crane – as a rough guide, around three metres of clear width and a solid standing area for the crane are needed. The crane must be able to swing freely up to the building site, clear of overhead lines and trees. The manufacturer checks the access, the crane standing area and the module sizes before assembly day during an on-site inspection.
How does a prefab house even get to the building site?
Short answer: The prefabricated components are produced in the factory and transported to the site by low-loader. With panel construction (Elementbauweise), individual wall, ceiling and roof elements arrive, which a mobile crane lifts one after another onto the prepared foundation or basement and which the assembly team joins together. With modular construction (Modulbauweise), by contrast, complete room cells are delivered and lifted into place as a whole. In both cases, heavy vehicles and a crane are involved – which is why the accessibility of the plot is decisive.
What happens step by step on assembly day – from delivery and lifting into place through to the weatherproof shell – is described in the guide on the assembly day. The chosen construction method directly affects the logistics: a modular house needs more space and a stronger crane because of its large room cells than a small-format panel construction.
What requirements does the access route have to meet?
Short answer: The access route must be wide, high and load-bearing enough for a low-loader and a crane. As a rough guide, around three metres of clear width should be available, plus sufficient height with no low-hanging branches, power lines or canopies. Tight bends, a cramped turning area or parked cars can block the delivery. The ground matters too: soft soil, freshly backfilled trenches or an unpaved access track often will not bear the heavy vehicles.
Typical obstacles during delivery and how to solve them
| Obstacle | Problem | Possible solution |
|---|---|---|
| Narrow street | low-loader doesn't fit | transfer to a smaller vehicle |
| Low-hanging lines | crane can't swing | have the line temporarily secured |
| Soft ground | crane could tip over | lay out crane mats / steel plates |
| Tight turning area | no room to manoeuvre | coordinate delivery time and closure |
| Parked cars | blocked access | apply for a no-parking zone in time |
Apply for no-parking zones and road closures early
A crane and low-loader often require a short road closure or a temporary no-parking zone. Such permits need lead time and are usually arranged with the manufacturer and the local authority. Take care of this early so that the tightly scheduled assembly day doesn't fall through. You can find suitable providers with assembly experience via the provider comparison.
Will the crane reach your plot?
Experienced prefab house manufacturers check the access, crane standing area and module sizes in advance and choose the right construction method. Compare several offers from providers with assembly experience, free of charge and without obligation.
What is a crane standing area and how much space does the crane need?
Short answer: The crane standing area (Kranstellfläche) is the spot from which the mobile crane lifts the components across the plot. It must be level, load-bearing and large enough for the crane's extended outriggers, and it must offer a clear swing range up to the building site – with no overhead lines, tall trees or neighbouring buildings in the way. The further the crane has to stand from the house, the larger and stronger it must be. On cramped plots, the crane standing area is a deciding factor in which construction method is feasible.
If there is no suitable standing spot, a larger crane with a longer jib may be needed – which pushes up the cost. In extremely tight locations, such as an infill plot (Baulücke) set back from the road, a small-format panel construction or a kit house (Bausatzhaus) may be the better choice, because the parts can be assembled even without a large crane. Which house type suits narrow plots is shown in the guide on building on a small plot.
What role do module sizes and transport play?
Short answer: The size of the components determines how involved the transport becomes. Large room modules or wide wall elements can exceed the permitted dimensions for road traffic and make heavy-load transports with escort vehicles and a special permit necessary. Smaller elements are more flexible and fit through narrower access routes too. The manufacturer therefore matches the module sizes to how easily your plot can be reached – not every house can be transported to every location.
- Determine the maximum vehicle width and height for the access route.
- Check whether a heavy-load transport with a special permit is required.
- Clarify delivery time slots and any road closure with the local authority.
- Plan a passing or transfer area for smaller vehicles.
- Adapt the module size to the access route based on the manufacturer's recommendation.
What does the manufacturer check before assembly?
Short answer: Reputable manufacturers carry out an on-site inspection before assembly day and check the entire logistics chain: the width, height and load capacity of the access route, the room to manoeuvre, the crane standing area including its swing range, the condition of the ground, and the permits needed for closures and no-parking zones. On this basis they define the crane size, the vehicles and the module dimensions. This check is your most important assurance that the assembly will go smoothly.
Clarify accessibility before signing the contract
Sort out the access route, crane standing area and transport route before you sign a construction contract. If difficult accessibility is only discovered later, you risk expensive extra costs for larger cranes, heavy-load transports or transfer work. Have the on-site inspection and its result confirmed in writing. Suitable models can be found in the house catalogues.
Assembling a prefab house is a logistical pinpoint landing – but with the right preparation, entirely manageable. Anyone who coordinates access, crane and module sizes with the manufacturer early on gets to experience the moment the house takes shape within hours on assembly day as pure joy. What happens afterwards and how the day unfolds can be read in the guide on the assembly day.
Plan the assembly safely with the right manufacturer
We put you in touch with prefab house providers, free of charge and without obligation, who check access, crane standing area and transport for your plot in advance. Compare fixed-price offers at your leisure.
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 Prefab House Assembly – answered concisely by the Prefabricated House editorial team (as of 2026).
