The listing says “voll aufgeschlossen” (fully serviced), but the seller only produces an older invoice. Before you finalise your plot budget with that, you need two separate answers: What has been prescribed and paid for this exact building plot? And what does your own project mean for still-open items? The following procedure concerns preparing an enquiry in Lower Austria. Other federal states are not legally equated with this.
Finding the document for the correct plot
Our editorial recommendation: First ask for the tax assessment notice (Abgabenbescheid) and the corresponding proof of payment. Compare the plot number, cadastral municipality, date and the described occasion. A bank transfer with a general booking text does not yet explain for which area and which calculation basis it was made. In a later subdivision the earlier plot designation can also be different.
Create a small chain of documents: former plot, former notice, payment, current plot. If the connection between two steps is missing, explicitly mark this. Do not supplement it with the assumption that an old amount will anyway concern the entire current purchase object.
Asking the municipality about your own project
The town of Eggenburg describes the development contribution (Aufschließungsabgabe) in connection with the building-plot declaration or a building permit. It also names occasions for supplementary contributions, including changes to plot boundaries. Its information refers to the Lower Austrian Building Code. That shows why a historical payment and a new plan should be considered together. The amounts given on the municipal page are deliberately not transferred here to other municipalities. [EGG]
State in your enquiry whether you intend to buy unchanged, subdivide or erect a specific building. Ask which existing prescriptions will be taken into account and which documents are missing for a concrete assessment. Information about an abstract standard development is not a confirmed calculation of your still unresolved project.
An example with an open outcome
You want to purchase part of a larger plot. The selling person produces an old payment. Instead of apportioning this pro rata by square metres, you gather the then notice, the subdivision draft and a short description of the planned house. Your question is: What allocation exists to the new area, and which further tax-related checks does this constellation trigger?
The working result may initially be: “Payment for the former building plot documented; current allocation and new project not yet confirmed.” This statement is more robust for the purchase decision than a numerically precise but undocumented residual amount.
What additionally remains open
Road connection, water, sewer, electricity and individual connections you present in your own overview. From a single development contribution document there will editorially be no confirmation of completeness for all development and connection costs. Have concrete charges, contractual assurances and technical connection possibilities checked by the respective competent authorities before you base your budget or a purchase agreement on them.