1. What preparation consists of
Five elements precede construction.
| Element | What it provides |
|---|---|
| Geodetic base plan | the existing situation on the plot |
| Engineering geological survey | the basis of the foundation solution |
| Design | scope depends on the building and the procedure |
| Energy performance certificate | part of the design documentation |
| Building permit or building notice | depends on the building and its parameters |
The conditions of the permit procedure are covered in a separate guide; this article is limited to their cost effect. Only the costs are examined here.
2. Why it is underestimated
Three reasons. Preparation is not visible. Its output is a document, not a building.
It takes place before quotations are sought, so it is not compared against the construction price. The cost arises at the start of the project.
Its scope depends on the project, so an average figure is less reliable than for construction. The scope follows from the complexity and the surveys needed.
On commercial sources these costs often fall between €5,000 and €15,000, though for special projects and more complex architecture they can be considerably higher. The width of the range reflects a real difference here, not imprecision in the estimate: a threefold gap between the lower and upper end is genuine.
3. What economising here costs
This is the practical core of the article. Preparation is a cost that cannot be avoided, only moved.
Preparation is the cheapest stage of a project in which to make changes. The same change costs little at design stage, a great deal during construction, and most of all after completion.
| When the change is made | Relative cost |
|---|---|
| At design stage | small |
| During construction | large |
| After completion | largest |
Economising on preparation therefore does not reduce the cost of a project, it moves decisions into a later and more expensive stage. The cost reappears in the construction budget.
This is the same logic as in the article on foundations and ground conditions, where omitting the survey leads to oversizing. In both cases the cost does not disappear, it changes place.
4. In what order to act
Four steps whose order affects cost. Geodetic base plan before design, because the design rests on it.
Ground survey before choosing the foundation solution, because it determines that solution. The wrong order forces redesign.
Design before connection applications, because the connection depends on the building's requirements.
Connection applications early, because their processing takes time.
Between the third and fourth steps there is tension: the design must be sufficiently complete, but the application must be sufficiently early. This has to be planned rather than left to happen. In practice it means the main fuse requirement should be determined as soon as the services solution is known, even if the design as a whole is not final.
5. What preparation delivers
Three things that are not documents. Comparable quotations, because contractors are pricing the same content.
A realistic budget, based on solutions rather than assumptions.
Fewer changes during construction, which is the largest single risk to a construction budget.
The third is the most significant financially, though the hardest to demonstrate in advance: a change avoided leaves no trace in the budget, so the value of good preparation is invisible precisely when it is working. It concerns connections and external works.
In summary, and four practical rules
Preparation consists of five elements and on commercial sources costs often €5,000 to €15,000, considerably more for complex projects. It is underestimated because it is not visible and takes place before quotations are sought. Economising on preparation does not reduce the cost of a project but moves decisions into a more expensive stage, by the same logic as omitting a ground survey.
Four rules: show preparation as a separate line in the budget, not inside overheads. Explain to the client how the cost of changes grows over time. Follow the order of the steps, because work done in reverse often has to be redone. Submit connection applications early, whatever the start date of construction.
This article serves professional orientation at the date of checking. It is not a quotation.