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Building law in Upper Austria: Oö. Bauordnung 1994 and OIB guidelines

Upper Austria did not adopt the 2023 OIB guidelines as a package. Guidelines 1 to 5 apply in the new edition, guideline 6 does not, according to the OIB overview. Anyone planning there works with two editions in one project. Piloti keeps them apart guideline by guideline and names the edition that applies for every requirement.

OIB status per the OIB overview “Inkrafttreten der OIB-Richtlinien”: 2023 edition as of September 2025, RL 6 edition 2025 as of July 2026. Legal text from RIS.

In short

Piloti answers questions on a project in Upper Austria from the Oö. Bauordnung 1994 and the OIB guidelines and names, guideline by guideline, the edition that applies there. According to the OIB overview (as of September 2025), OIB guidelines 1 to 5 in the 2023 edition have been binding since 1 October 2025; for OIB guideline 6 the overview does not list the 2023 edition as in force, so the 2019 edition generally still applies.

Try it with a real questionChecked: September 2026

What applies in Upper Austria

Piloti draws on these sources for a project in Upper Austria, each with its citation.

Oö. Bauordnung 1994
Applications and permits. The basis of every answer on an Upper Austrian project.
OIB guidelines 1–5
Mechanical resistance, fire safety, hygiene, safety in use and accessibility, sound insulation: 2023 edition, binding since 1 October 2025 according to the OIB overview.
OIB guideline 6
Energy saving and thermal protection: the 2023 edition is not in force according to the OIB overview, nor the 2025 edition according to the overview (as of July 2026). The 2019 edition generally still applies.

Two editions in one project

A file note that writes “according to OIB guidelines 2023” across the board for a project in Upper Austria is right for fire safety or sound insulation, but generally not for thermal protection. There, according to the OIB overview, no edition newer than 2019 is in force.

Then there is the effective date: guidelines 1 to 5 in the 2023 edition only apply since 1 October 2025. For procedures filed before that, the older edition can still govern. The state’s transition rules decide that, not the guideline itself.

Piloti therefore names the edition for each OIB requirement separately instead of assuming one for the whole project. The file note then carries, for every topic, the guideline actually in force in Upper Austria.

How Piloti answers a question on a project in Upper Austria

  1. 01

    State and date

    If the project lacks the state, Piloti asks once. If the answer depends on the OIB edition, it asks for the submission date or states its assumption.

  2. 02

    Guideline and edition

    A fire-safety question it bases on RL 2, 2023 edition. For a thermal-protection question it names the edition that applies to RL 6 in Upper Austria.

  3. 03

    Cite like a permit

    “Oö. Bauordnung 1994, § …” or “OIB-RL 2, Pkt. …”, checked against the source text before it appears. Piloti opens the state passage from RIS at the marked place.

Good to know

The municipal building authority decides on the project; responsibility for the design stays with the office. Piloti names every source with edition and citation so the office can check it, and asks for the submission date when the state’s transition rules turn on it. It reads the development plan from the project.

Questions

Which OIB guidelines apply in Upper Austria?

According to the OIB overview (as of September 2025), Upper Austria applies OIB guidelines 1 to 5 in the 2023 edition, binding since 1 October 2025. RL 6 in the 2023 edition is not listed as in force there, nor the 2025 edition according to the overview (as of July 2026); for energy saving and thermal protection the 2019 edition generally still applies. Exceptions and transition rules are in state law.

Where can I read the Oö. Bauordnung 1994 in full?

In the federal legal information system (RIS), free of charge and in its current version. When Piloti cites from it, the passage opens straight from RIS inside Piloti, marked.

Can Piloti answer questions on the Upper Austria building code?

Yes. Piloti cites answers on an Upper Austrian project from the Oö. Bauordnung 1994 and the OIB guidelines, with a checked citation and the edition for each guideline. The answer is a working basis for the office, not information from the authority.

Why does RL 6 apply in a different edition in Upper Austria?

Each state decides whether and when it declares an OIB edition binding, and can do so guideline by guideline. According to the OIB overview, Upper Austria adopted the 2023 edition for guidelines 1 to 5 but not for RL 6. The overview does not give reasons; state law holds the rule in force.

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