This is not possible to the cent in terms of a legally binding cost estimate. Only a fairly accurate estimate can be made in the context of a price quotation.
First of all, the facts from the non-destructive examination are compiled. I evaluate these with my experience gained in 22 years as a furniture restorer, sometimes it is advisable to call in other experts for an appraisal. From the analysis of the ACTUAL condition, I develop the necessary measures and assess the material and labour costs. This determines the approximate cost framework.
As a rule, the previously estimated sums can be adhered to. However, the financial evaluation is difficult before the start of a restoration, because it is not foreseeable whether there will be "surprises" and whether all measures can be implemented as hoped.
If, in the course of the work process, it becomes apparent that the estimate made cannot be kept to, the estimated cost will be made more precise and the further procedure will be discussed with the client.