- Identify the plot by cadastral municipality and plot number before assigning planning symbols to it.
- Assess the plan, general provisions and special provisions together.
- Document current planning law, potential project floor area and existing permission separately.
Which plot and which plan are being referred to?
Start with a current land register extract and a site plan. A postal address may cover several plots; different provisions can also apply within a single plot. Put the cadastral municipality, plot numbers and valuation date on a cover sheet. Also indicate whether you are valuing the current condition or examining a future development.
Find the property in Vienna's information system and activate the planning-document boundary layer. The plot query allows you to download the plan and text section. Save both files with the planning-document number and retrieval date. Where several documents overlap or adjoin one another, ask which provisions actually apply to the affected part of the plot. An extract without a document number is insufficient for a transparent valuation.
Foundations: Stadt Wien [1]
Which statements belong in your zoning worksheet?
Read the symbols using the official legend appropriate to the plan. Keep your initial transcription descriptive: what actually appears in the plan, to which area does it apply, and which text provision does the number refer to? Only then turn abbreviations into a question for the planning professional. This prevents an apparently unambiguous colour from becoming an unsupported promise of development.
| Provision | Dossier entry | Consequence to clarify |
|---|---|---|
| Land-use zoning | Category and geographical scope | Does the intended use fit? |
| Building class and development type | Symbol and any additional information | What building form is possible in principle? |
| Building lines and buildable areas | Line positions with source reference | Where can a project be located at all? |
| Special provisions | Number and full text passage | What additional limits or requirements apply? |
| Zones and building restrictions | Designation, legal basis and current status | What additional review is required? |
Foundations: Stadt Wien [1] · Stadt Wien [2]
Why the building class does not establish saleable floor area
A plot of a given size does not become project floor area simply by multiplying it by a number of storeys. The usable geometry depends, among other things, on shape, building lines, building arrangement and applicable requirements. Stairs, circulation and technical areas also differ from the usable floor areas that can later be sold. An initial test requires a clear planning sketch with area definitions.
Ask the planning professional to disclose the starting inputs: which provisions were considered, which questions remain unresolved and which parts of the concept require exceptions or additional procedures? In the valuation, use separate rows for plot area, assumed gross floor areas and derived usable floor areas. A preliminary study remains a preliminary study; it replaces neither the complete project nor the required administrative procedure.
Foundations: Stadt Wien [3]
How should drafts and building restrictions be handled?
A published planning procedure may be relevant to the future. It must not, however, be recorded as new zoning already in force. Vienna's map also shows procedures and various building restrictions. Their specific effect must be clarified with the competent authority and, where appropriate, the project planner; the designation alone does not explain how an individual project will be treated.
For changes, maintain two separate analyses: the documented legal and existing position on the valuation date, and an explicitly conditional future scenario. In the scenario, note the next procedural step required. Additional potential usable floor area belongs in a robust calculation only once its requirements have been professionally examined and the remaining uncertainties are visible.
Foundations: Stadt Wien [1]
Which question will obtain a useful answer?
An enquiry such as 'What is my plot worth?' gives the planning authority little to work with. Better: 'For plot X in cadastral municipality Y, I have found these provisions. Which apply to the marked area, and how should special provision Z be understood?' Attach the extract, the text and your specific question about use. For project questions, add the labelled sketch.
Keep official documents, professional interpretations and your own assumptions separate in your records. The City of Vienna expressly states that no legal entitlement can be derived from the online overview. General information also does not automatically confirm that a particular design can be approved. Your result is a verifiable plot profile that allows valuation and planning to continue on the same basis.
Foundations: Stadt Wien [1]
Fictional case: one plot, two areas subject to different rules
A purely hypothetical property with no real address or actual building project. Sales particulars describe the entire area as usable for a residential project.
- The owner marks the plot boundary and finds that a rear area carries different planning symbols from the street-facing section.
- He downloads the plan and text. The planning professional must clarify which provisions apply in each area and how access would be arranged.
- A previously quoted project floor area is treated as an unconfirmed assumption until a verified preliminary study is available. The dossier records the unresolved question and the competent information service.
At first, the dossier provides no new square-metre figure. It does, however, prevent the entire plot area from being valued using the same unchecked development expectation.
Your next assessment steps
Record what you have already clarified and which documents you still need.
Record the plot's identity
This prevents provisions for other plots, or provisions that apply only partly, from being assigned to it.
Where can I obtain the supporting information?
Cross-check the land register extract and cadastral documents.
Save the plan and complete text
This makes general and special provisions verifiable later.
Where can I obtain the supporting information?
Vienna land-use zoning and development plan information system.
Mark unresolved planning symbols
This brings together questions about partial areas, zones and overlapping documents.
Where can I obtain the supporting information?
Contact the urban development service with a specific extract.
Document project assumptions
This separates professionally investigated areas from mere development ideas.
Where can I obtain the supporting information?
Commission an authorised planning professional to prepare a floor-area study.
Reading and checking are possible without signing in. Your saved checklists are private under My area. The selection does not confirm a professional assessment of your property.
Sources and date
The following sources support this main article. For your specific property, current documents and the applicable conditions matter.
- Stadt WienLand-use zoning and development plan information system
- Stadt WienLegend for the land-use zoning and development plan, 2019
- Stadt WienGeneral building permission for buildings or structures
Editorial date: 11/09/2026. Examples explain relationships and do not contain an individually prepared property valuation. Editorial work and sources.
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