What is modular construction?
Short answer: Modular construction means: A house is created from prefabricated room modules. These are fully finished in the factory, transported to the construction site by low-loader and placed on the foundation there in just one to five days by crane. The overall project typically takes four to eight months in 2026 — turnkey from approx. 1.900 €/m².
The key difference from conventional construction: The majority of the work does not take place on the construction site, but in the production hall — dry, precise and independent of the weather. While the foundation is being prepared on site, the modules are already growing in the factory. This parallelism is the reason for the short overall construction time.
Modular construction method, serial construction, element or room module construction?
The terms are often mixed up. Serial construction is the overarching term for standardized, repeatable construction processes. The modular construction method is a specific form of it: It works with room-sized 3D modules. In contrast, the element or panel construction method (2D) involves flat components being brought to the construction site. Room modules have the highest degree of prefabrication — in return, transport dimensions limit the possible module size.
Degrees of Prefabrication in Comparison: from Room Module to Conventional Construction Method
| Construction Method | Prefabrication | Characteristic |
|---|---|---|
| Room Module (3D) | very high | Complete room as a box, delivered fully finished |
| Element/Panel Construction (2D) | high | Flat wall/ceiling elements, assembly on site |
| Serial Construction | variable | Overarching term for standardized, repeatable processes |
| Conventional (stone on stone) | low | Almost all trades take place on the construction site |
Process: from Factory via Transport to Erection
A modular construction project follows a clear, standardized process. Each step interlocks with the next — this makes the scheduling so reliable:
- Planning & Module Grid: Floor plan is broken down into transportable room modules.
- Factory Production: Modules are created weather-independent in the hall — in parallel with foundation preparation.
- Fit-out in Factory: Electrical, plumbing, windows, insulation and often bathroom/kitchen are already installed.
- Transport: Finished modules are taken by low-loader (if necessary heavy transport) to the construction site.
- Erection: A crane places the modules on the prepared foundation — usually in one to five days.
- Final Assembly: Module joints, connections to supply and disposal, roof and facade details are closed on site.
How crane, access and foundation interact on the erection day, read in detail under Erection and Transport.
Advantages and Disadvantages of the Modular Construction Method
The modular construction method plays to its strengths in terms of speed, predictability and quality. Limits are set primarily by transport and logistics. The most important points at a glance:
Modular Construction Method: Advantages and Disadvantages Compared
| Advantages of the Modular Construction Method | Points to Consider |
|---|---|
| Very short construction time on site (1–5 days) | Transport dimensions limit module width and length |
| Weather-independent factory production | Crane placement area and access must fit |
| Calculable fixed prices thanks to series production | Individual special requests increase the price |
| Expandable and partially relocatable | Foundation and approval remain the responsibility of the builder-owner |
| High, tested quality and dimensional accuracy | Less room for plan changes after production start |
For whom is modular house construction worthwhile?
Modular construction is suitable for all those who need a fixed move-in date, appreciate a calculable price and want to expand later. The comparisons show how the modular construction method performs against other options Modular House or Prefabricated House and Modular House or Tiny House. Those who rely on a sustainable building material will find the appropriate constructions under Timber Modular House the appropriate constructions. We explain the overarching principle behind the modular construction method under modular construction. You can calculate your total costs in the Cost Calculator.
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