In a direct communication, the source explained:

With the exception of a single layout-based conversion of the tables, nothing has changed in the old numbers until 2013. Due to revision-related changes, the reporting periods 2018 are affected back to 2014, all other figures have remained the same.

In response, we have:

1. Synchronized our extract (all series are NSA).
2. Recalculated our seasonally adjusted (SA) supplements.
3. Properties are otherwise unchanged.

The series reside in the historical catalog (Austria » Real Estate » Construction » Permits) and include, for example:

• HSQPMTNM3GUUQ.IAUT    = Real Estate: Building permits - Number of dwellings - In new residential buildings - With 3 or more dwellings, (#, NSA)
• HSQPMTNTUUQ.IAUT_SA   = Number of dwellings - In new buildings, (#, NSA) - for Salzburg
• HSQPMTNHOTDUQ.IAUT_OB = Number of new buildings - Non-residential - Hotels; inns and guesthouses, (#, NSA) - for Oberösterreich
• HSQPMTNRDAQ.IAUT_NI   = Number of new buildings - Residential - Total, (#, SAAR) - for Niederösterreich

Because catalog locations are subject to change, the upper-right box on DataBuffet.com provides a "find in catalog" mode that accepts a mnemonic.