Vienna, Austria
Vienna's land register is open to anyone for EUR 4.89 an extract, yet its defining owner is the city itself: Wiener Wohnen's 220,000 council flats house a quarter of the population, beside the federal estate, the railway and a CPI-controlled listed sector.
10 buildings · 8 with an owner established · 28 sources · 2 tier B · 8 tier A · prepared 2026-10-20
Can you find out who owns it?
Austria's land register (Grundbuch) is public: the Justice Ministry's own guidance says anyone may inspect it, both the main book and the deed collection. An extract of a property's full entry (A sheet for the land, B sheet for the owners and their shares, C sheet for mortgages and other burdens) costs EUR 4.89 online through JustizOnline or one of ten authorised clearing points, or EUR 19 printed at any district court. What is not open is the search by name: the owner index (Personenverzeichnis) needs a stated legal interest, so you must know the address or plot to find who owns it.
Is ownership public?Public, but one paid search at a time
Cost of one title searchEUR 4.89 per full current extract (Vollabfrage einer Einlagezahl) online, plus the clearing point's own charges; EUR 2.60 for one sheet; EUR 19 printed at a district court
Bulk ownership dataNone published
Sale pricesEvery sale, with its address
Sites that forbid taking their data
- viennaairport.com — “Any automated access to the website, in particular the reading, automated input or manipulation of data by software programs (in particular bots), is expressly prohibited.”
- www.deka-immobilien.de — “The information ... may not be shared with third parties, reproduced, distributed or published in part or in whole without the prior express written consent of Deka Immobilien.”
- www.wolftheiss.com — “The content of Wolf Theiss' website ... is protected by intellectual property rights and designed for private use only. ... You must not modify, reproduce, copy, distribute, disclose to third parties or derive commercial use or benefit from such content.”
- www.schoenherr.eu — “The content of the Schoenherr website is protected by copyright and designed for private use only.”
- oebb.at (infrastruktur.oebb.at, immobilien.oebb.at) — “Sämtliche auf der Website bereitgestellten Inhalte sind urheberrechtlich ... geschützt und soweit nicht gesondert anderweitig gekennzeichnet nur zur persönlichen, nicht kommerziellen Nutzung bestimmt.”
- www.unov.org — “The United Nations grants permission to Users to visit the Site and to download and copy the information ... for the User's personal, non-commercial use, without any right to resell or redistribute them or to compile or create derivative works therefrom”
- www.big.at — “Eine Verwendung der Inhalte unserer Webseite (insbesondere Bilder) ohne unsere ausdrückliche Zustimmung ist nicht gestattet.”
- www.sozialbau.at — “Alle Nachrichten, Grafiken und das Design der Website dienen ausschließlich der persönlichen Information.”
- cpi-europe.com — “... may not be reproduced, distributed for commercial or other purposes without the advance express written permission of the copyright owner.”
- simmoag.at — “The content must not be copied, disseminated, modified or made accessible to third parties for any commercial purposes.”
- www.caimmo.com — “All content of this web site is protected by copyright and may not be copied, distributed, modified or made available to third parties without the advance consent of the rights holder.”
- www.buwog.at — “Alle Inhalte dienen ausschließlich der persönlichen Information. Eine Weiterverwendung und Reproduktion über den persönlichen Gebrauch hinaus ist nicht gestattet.”
- www.burghauptmannschaft.at — “Außer zu kommerziellen Zwecken, ist bei Quellenangabe ein Nachdruck gestattet. Bei kommerzieller Nutzung bedarf es einer Genehmigung.”
1
The marquee buildings
The towers that set the tone of the core, and who holds them. A price is the price a document states, on the date it states — not an estimate of what the building is worth now.
| Building | Use | Owner | Owner type | Last price paid |
|---|---|---|---|---|
| Hofburg (Imperial Palace Vienna) Michaelerkuppel / Heldenplatz, 1010 Vienna |
Civic | Republic of Austria (administered by Burghauptmannschaft Österreich) Burghauptmannschaft Österreich, an office under the Federal Ministry for Economy, Energy and Tourism, says a 2000 amendment transferred to it the buildings counted as Austria's cultural heritage, 'darunter ... die Hofburg Wien, das Bundeskanzleramt und das Schloss Belvedere', 105 properties in all. Its 'at a glimpse' page (s28) says the palace serves sovereign purposes (seat of the Federal President) and museums; tenants include the President's office, Federal Chancellery, foreign ministry, OSCE, Albertina, Imperial Treasury and the National Library. Tier B: tenant list from s28. |
Government | —B |
| Schönbrunn Palace and Gardens (Schloss Schönbrunn) Schönbrunner Schloßstraße 47, 1130 Vienna |
Civic | Republic of Austria (represented by Burghauptmannschaft Österreich) Burghauptmannschaft's property page: 'Burghauptmannschaft Österreich (Verwaltungsabteilung) only represents the Federal Republic as the owner of the building, yet, does not have any other obligations', and refers readers to the occupant and management body, Schloß Schönbrunn Kultur- und Betriebsgesellschaft m.b.H., and to Österreichische Bundesgärten for the park. So the Republic owns it; the Schönbrunn company runs it. |
Government | —A |
| DC Tower 1 Donau-City-Straße 7, 1220 Vienna (Donau City) 75,000 m2 leaseable · 60 floors |
Mixed use | Deka Immobilien Investment GmbH (Deka funds) Deka Immobilien news item 'DC Tower in Vienna fully leased': at 250 m 'Austria's tallest office building', it 'opened in February 2014 and has been owned by Deka Immobilien Investment GmbH since 2017'; 75,000 sqm leaseable on 60 floors, about 60% offices, 31 tenants including a five-star hotel. No price stated. Deka Immobilien is the property arm of DekaBank, the German savings banks' asset manager. The fund split and seller come only from search snippets of a law-firm release that now 404s (see unverified). |
Institution | —A |
| Millennium Tower Handelskai 94-96, 1200 Vienna about 40,000 m2 commercial rental space; plot 2,767 m2 · 50 floors |
Mixed use | Art-Invest Real Estate special fund for Rheinische Versorgungskassen Wolf Theiss release, Vienna, 23 Nov 2017: German investor Art-Invest acquired the 'landmark property Millennium Tower'; 'The purchase took place for a special fund which Art-Invest established on behalf of the pension fund Rheinische Versorgungskassen.' 50 storeys, 202 m, about 40,000 m2 of commercial rental space. Art-Invest's own project page (s10): Handelskai 94-96, plot 2,767 m2, 497 parking spaces, office/retail/hotel, 'Acquired in: Q4 2017', its entry into the Austrian market. No price stated in either. The adjoining Millennium City mall is not covered by these pages. |
Pension fund | —A |
| Vienna International Centre (UNO City) Wagramer Straße 5, 1220 Vienna 180,000 m2 complex; about 4,500 offices, 19 conference rooms |
Institutional | Republic of Austria (lessor; leased to the UN and IAEA) UNOV history page: Austria offered in 1966 to build the centre; construction began in 1972 under the IAKW; 'The costs of constructing the VIC were shared by the Government of Austria (65 per cent) and the city of Vienna (35 per cent).' Inaugurated 23 Aug 1979. 'The Government of Austria handed over the VIC complex to the United Nations and IAEA for the symbolic rental sum of one Austrian schilling (equivalent to 0.07 euro today) a year for 99 years.' Extraterritorial; the organisations bear running costs. The IAKW's own site did not answer. |
Government | ATS ATS 1 per year (EUR 0.07) rent, 99-year term 1979-09 A lease, not a sale: symbolic annual rent stated by UNOV; agreements signed 28 Sept 1979. A |
| Wien Hauptbahnhof (Vienna Main Station) and the Sonnwendviertel / Quartier Belvedere development Am Hauptbahnhof, 1100 Vienna 590,000 m2 development area; about 1.1M m2 gross floor area in total |
Mixed use | ÖBB-Infrastruktur AG (station; land managed by ÖBB-Immobilienmanagement GmbH) ÖBB-Immobilienmanagement project page: the 590,000 m2 former freight-yard area round the new main station, 'Projektstatus: Verwertung abgeschlossen' (disposal complete); about 5,000 flats for 13,000 people, offices on about 550,000 m2 GFA for 20,000 jobs, an 8 ha park, a station mall of about 20,000 m2 with 90 shops. Its home page (s12) says it manages 'die Liegenschaften der ÖBB-Infrastruktur AG'. So the station stays with the state railway while the plots went to the builders of Quartier Belvedere and Sonnwendviertel, not named here. Tier B: owner link from s12. |
Government | —B |
| Vienna International Airport (Flughafen Wien-Schwechat) 1300 Schwechat, Lower Austria (outside the city boundary; Vienna's airport) |
Civic | Flughafen Wien AG (listed on the Vienna Stock Exchange) City of Vienna and Province of Lower Austria 20% plus 4 shares each (syndicated); Airports Group Europe S.à r.l. (IFM) the largest shareholder Lower Austrian Landtag motion Ltg.-330/XX-2024 (20 Feb 2024): Vienna and Lower Austria each hold '20% plus je 4 Aktien'; Airport Group Europe S.à r.l., behind which stands an IFM fund, reached 39.8% through free-float purchases in 2015-16 and is 'der größte Aktionär'. Quoting the Constitutional Court (KR 1/2018-30, 11 Dec 2018): the board's capital side has two members each from Vienna, Lower Austria and Airports Group Europe, one from the employee foundation and three from free float. IFM's current percentage is not stated; the airport's site forbids bots. |
Public company | —A |
| Austria Campus Am Tabor / Rothschildplatz, 1020 Vienna (Nordbahnhof) |
Office | Not established the source would not open The office campus built as UniCredit Bank Austria's headquarters on the former Nordbahnhof site was sold off in parts during development. Search results point to a forward sale of three of six building parts to PGIM Real Estate in October 2017, building 1 to the Vienna Chamber of Commerce (Wirtschaftskammer Wien) at the end of 2017, and building part 3 later to a special fund of the Bayerische Versorgungskammer, but every page carrying those claims was either a news site whose robots.txt bars AI agents (wien.orf.at, derstandard.at) or not found on the buyers' own sites within budget. Owners are therefore left blank; the Grundbuch would answer for EUR 4.89 per Einlagezahl. |
Not established | —A |
| Gasometers A-D (Gasometer City) Guglgasse, 1110 Vienna (Simmering) |
Mixed use | Not established a paid title search would answer it Four former gas-holder towers, heritage-listed in 1981 and converted around 2001 into flats, offices, a student hall, an event hall and a mall. Each tower is a separate property with different developers and, inside, condominium units, so there is no single owner; no annual report, municipal page or sale announcement naming the owner of any tower was found. Individually owned flats stay blank under this section's rules; the commercial parts could be read from the Grundbuch per Einlagezahl at EUR 4.89. |
Not established | —A |
| Vienna Twin Towers Wienerbergstraße, 1100 Vienna about 66,000 m2 gross lettable area |
Office | S IMMO AG (100% owned by CPI Europe AG, formerly IMMOFINANZ) S IMMO ad hoc notice, 11 July 2023: S IMMO AG 'concluded the purchase of the Twin Towers on Wienerbergstrasse in Vienna from IMMOFINANZ AG'; about 66,000 m2 GLA, 'recently valued at EUR 194m', rental income EUR 12.6m a year; a related-party deal under s.95a(2) AktG. The valuation is not stated as the price, so no acquired price is recorded. CPI Europe's about-us page (s22): 'CPI Europe owns 100% of the shares in S IMMO'. So the towers moved between two companies of the same CPI Property Group. |
Public company | —A |
2
The core land
The most valuable ground in the city, and what the public record says about it.
Vienna has no published assessed-value roll: the tax values (Einheitswerte) are not public, and land prices come from the Grundbuch's deed collection one contract at a time. What the city does publish is who owns its buildings, by class of owner and district, from the 2021 register census. It shows the centre is the one district where companies rival private persons, while the council and co-operative estates dominate the outer districts.
Buildings in Vienna by owner, 2021175,760: private persons 118,569; public bodies 25,547; limited-profit housing associations 19,950; other legal persons 11,694
Stadt Wien table 2.1.2 (Statistik Austria Registerzählung 2021). Buildings counted, not flats: a council block and a villa each count once.
Innere Stadt (1st district) buildings by owner, 20211,583: private persons 669; other legal persons 581; public bodies 324; housing associations 9
Same table. Companies own 37% of the old town's buildings, against 7% city-wide.
Donaustadt (22nd) buildings owned by housing associations, 20216,952 (up from 5,807 in 2011)
Same table: the largest co-operative holding of any district, where most of the city's new subsidised housing is built.
Council flatsabout 220,000, home to about 500,000 people (a quarter of the population)
Wiener Wohnen, Über uns, 2026.
3
Who owns the town
At this scale the significant owner is rarely a trust or a fund: it is one or two local holding companies, a family in its second or third generation, and often the land around the town rather than the buildings in it.
Vienna's largest landlord is the city itself. Wiener Wohnen, a municipal enterprise, manages about 220,000 council flats housing about a quarter of the population, and the limited-profit housing associations (gemeinnützige Bauvereinigungen) own another large slice: in the 2021 register census they held 19,950 of Vienna's 175,760 buildings against 25,547 held by public bodies. The federal state holds its heritage palaces through Burghauptmannschaft Österreich and its schools, universities, courts and offices through Bundesimmobiliengesellschaft (BIG) and BIG's subsidiary ARE; the railway holds its stations and remaining yards. Private persons own most buildings by count (118,569) but these are mostly houses; the city's centre is split almost evenly between private persons and companies.
| Name | Type | Holdings |
|---|---|---|
| ÖBB (Austrian Federal Railways) — ÖBB-Infrastruktur AG, managed by ÖBB-Immobilienmanagement GmbH ÖBB-Immobilienmanagement 'in Zahlen (per 31.12.2025)': 'rund 190,8 Mio. m² Gesamtgrundfläche', 21,914 Liegenschaften, 3,482 buildings, 1,056 passenger stations, about EUR 39.1M of property sales and about EUR 112.2M of rent and lease income from the market in 2025. These are national figures, not Vienna's. In Vienna the railway's disposals created whole districts: the 590,000 m2 Hauptbahnhof area (disposal complete) and the Nordwestbahnhof site still under development. |
Government | about 190.8 million m2 of land; 21,914 properties; 3,482 buildings (Austria-wide, 31 Dec 2025)A |
| City of Vienna — Wiener Wohnen (Unternehmung Stadt Wien – Wiener Wohnen) Wiener Wohnen's 'Über uns': the municipal enterprise 'verwaltet, saniert und bewirtschaftet die städtischen Wohnhausanlagen Wiens. Dazu gehören rund 220.000 Gemeindewohnungen (davon rund 1.400 Hausbesorger*innendienstwohnungen und 7.500 Wohnungen in Fremdverwaltung), 5.129 Lokale und über 47.000 Garagen- und Abstellplätze.' About 500,000 people live in council housing, 'ein Viertel der Wiener Bevölkerung'; more than EUR 1 billion has been spent since 2008 renovating council blocks with almost 40,000 flats. |
Government | about 220,000 council flats, 5,129 commercial units, over 47,000 garage and parking spacesA |
| WISEG (majority owned by the City of Vienna; Wiener Wohnen is limited partner) Same page: 'Die WISEG ist ein mehrheitlich im Eigentum der Stadt Wien stehendes Immobilienunternehmen, in dem im Wesentlichen die nicht klassischen Wohnhäuser (Zinshäuser), die ohne Verwendung von Mitteln aus der Wohnbausteuer meist von Privaten errichtet wurden, gebündelt sind. Wiener Wohnen ist Kommanditistin.' So the city's old private-built tenement houses sit in a separate company from the council estates. |
Government | not statedA |
| Republic of Austria — Bundesimmobiliengesellschaft (BIG) and subsidiary ARE Austrian Real Estate BIG 'Über uns': 'Unser Portfolio umfasst rund 2.000 Liegenschaften und Grundstücke mit einem Fair Value von knapp 18 Milliarden Euro', mainly schools, universities and special properties, also offices and housing; largest tenants are the education ministry, the universities and the interior and justice ministries. Portfolio page (s18): over 400 school and over 200 university properties, about 2.3M m2 for the 22 universities; about 800 special properties (prisons, courts); about 590 office and residential properties in ARE. National figures; BIG owns most university buildings in Vienna, the universities being tenants. |
Government | about 2,000 properties, fair value almost EUR 18 billion (Austria-wide)A |
| Republic of Austria — Burghauptmannschaft Österreich (heritage estate) Burghauptmannschaft: buildings counted as Austria's cultural and historical heritage were transferred to it by a 2000 amendment, including the Hofburg, the Federal Chancellery, Belvedere Palace, the government building on Stubenring and several palaces in Vienna — 105 properties in all. It represents the Republic as owner of Schönbrunn. |
Government | 105 properties (in and outside Austria)A |
| SOZIALBAU group (SOZIALBAU AG and its limited-profit housing group) SOZIALBAU's Kennzahlen for 2025: balance-sheet total EUR 3.4 billion, equity ratio 52%, turnover EUR 414 million, 'Verwaltete Wohnungen: 55.776', 'Wohnungen in Bau: 1.259', construction investment EUR 97 million. 'Managed' includes homes the group administers for others, so this is not a pure ownership count. The group is a limited-profit housing association under the WGG. |
Institution | 55,776 managed flats; 1,259 under construction (2025)A |
5
Who builds the houses
New-home building in this market: the volume, and the firms behind it. Ownership of a builder matters as much as its volume — a private-equity platform and a family firm behave differently.
Vienna builds most of its new housing through subsidy, not the open market. The city builds council flats again through Wiener Wohnen's Gemeindebau NEU programme, while limited-profit housing associations (gemeinnützige Bauvereinigungen), governed by the WGG with capped rents and profits, build most subsidised rental flats. Commercial developers and listed landlords build free-market and condominium flats. No official league table of builders exists; figures here are the builders' own.
| Name | Type | Units |
|---|---|---|
| City of Vienna — Wiener Wohnen (Gemeindebau NEU programme) City of Vienna, 6 Jul 2026: the Bernoullistraße groundbreaking is 'der 27. Gemeindebau NEU, für den ein Baustart erfolgte. 18 davon sind bereits fertiggestellt und das neue Zuhause für rund 4.500 Wiener*innen. An über 1.000 neuen Gemeindewohnungen wird aktuell ... gebaut', bringing the programme to over 5,700 new council flats for about 13,000 residents. The city resumed building council housing itself after a pause; this block has 88 flats. |
Government | over 5,700 new council flats launched; 27 blocks started, 18 completed; over 1,000 under construction (July 2026)A |
| SOZIALBAU group (limited-profit) SOZIALBAU Kennzahlen 2025: 'Wohnungen in Bau: 1.259', 'Verwaltete Wohnungen: 55.776', construction investment EUR 97 million. The largest limited-profit group in Vienna by its own figures; limited-profit associations build most of Vienna's subsidised housing. |
Institution | 1,259 flats under construction; 55,776 managed (2025)A |
| ARE Austrian Real Estate (federal, via BIG) ARE 2025: total investment EUR 399.3M, of which EUR 397.9M in project development, across offices and housing, much of it in Vienna; the page does not give unit numbers. |
Government | EUR 397.9M project-development investment (2025)A |
6
Commercial landlords
The commercial side, counted separately from housing: who holds the office, retail and industrial floor area.
Vienna's office stock is held by Austrian listed companies, now mostly controlled from Prague, German open-ended and pension funds, and the federal property group. The listed field has consolidated: CPI Property Group controls CPI Europe (formerly IMMOFINANZ), which owns all of S IMMO, and both trade buildings between themselves. Figures are group-wide unless stated; none of these companies publishes a Vienna-only floor-area total on the pages opened.
| Name | Type | Portfolio |
|---|---|---|
| CPI Europe AG (formerly IMMOFINANZ), with subsidiary S IMMO AG — 75.03% held by CPI Property Group CPI Europe 'About us': 'CPI Europe owns 100% of the shares in S IMMO and fully consolidates this company. The property portfolio of CPI Europe (including S IMMO) has a value of approximately EUR 8.6 billion and covers over 350 properties'; listed in Vienna since 1994. Shareholder page (s23): 'CPI Property Group currently holds (directly and indirectly) 75.03% of the voting rights'. Both companies are headquartered in Vienna; the figure covers all their markets, not Vienna alone. Vienna holdings include the Twin Towers (see marquee). |
Public company | about EUR 8.6 billion, over 350 properties (group-wide, incl. S IMMO)A |
| ARE Austrian Real Estate GmbH (subsidiary of the federal BIG) ARE facts & figures from its 2025 annual report: 590 properties, 1.9 million m2 lettable area, rental income EUR 262.1M, vacancy 2.2%, market value EUR 5 bn, total investment EUR 399.3M of which project development EUR 397.9M. Office and residential arm of the Republic's property company. |
Government | 590 properties; 1.9M m2 lettable; market value EUR 5 billion (2025, Austria-wide)A |
| Deka Immobilien (DekaBank / German savings banks' funds) Owns DC Tower 1 since 2017 (s8). S IMMO's release of 21 Jul 2017 (s24): S IMMO 'signed contracts for the sale of the properties Hoch Zwei and Plus Zwei to the German Deka Immobilien', two office buildings in Viertel Zwei, 2nd district, over 43,000 m2 above-ground lettable, let to OMV; price stated only as 'EUR 75m higher than the initial acquisition price of S IMMO in the year 2010'. Closing was then expected in Q3 2017 subject to competition clearance; whether Deka still holds them was not checked. |
Institution | DC Tower 1 (75,000 m2) plus Hoch Zwei and Plus Zwei (over 43,000 m2 above ground)A |
| CA Immobilien Anlagen AG (CA Immo) CA Immo is headquartered at Mechelgasse 1, Vienna, and listed in Vienna since 1988, but its portfolio page now lists a single Vienna building ('Silbermöwe, AT | Vienna, Office, 17,500 m2, Completed') among mostly Berlin, Munich, Frankfurt and Warsaw assets; it says Berlin is 'by far CA Immo's largest and most important single market'. A Vienna-based landlord that now owns little of Vienna. |
Public company | one Vienna asset on its current portfolio page: Silbermöwe, 17,500 m2 officeA |
?
Looked for and not found
Claims this page would have made if a source could be opened. They are left out rather than guessed.
- DC Tower 1: seller (a UniCredit Bank Austria AG subsidiary), closing 6 July 2017, price undisclosed, and the 60% Deka-ImmobilienGlobal / 40% Deka-ImmobilienEuropa allocation appear only in search snippets of a Schoenherr release whose URL now returns 404 on schoenherr.eu; not cited.
- Austria Campus: three of six building parts forward-sold to PGIM Real Estate (Oct 2017, Signa-stated volume over EUR 530M), building 1 to Wirtschaftskammer Wien (end-2017), building part 3 to a Bayerische Versorgungskammer special fund. Search snippets only; no opened page.
- Flughafen Wien AG: IFM's current stake after its 2022 partial offer (search results say over 40%; the Landtag document gives 39.8% for 2015-16) — the airport's own site forbids automated access.
- Limited-profit housing associations' total Vienna stock (GBV federation statistics) — the federation's site would not render to scripts; only SOZIALBAU's own figure is recorded.
- University of Vienna, the Catholic Archdiocese of Vienna and Wiener Stadtwerke as landowners: no page stating a holdings figure was found within budget (BIG's portfolio page says BIG owns over 200 university properties nationally, so most University of Vienna buildings are BIG's, not the university's). Wiener Stadtwerke's site lists no property figures.
- BUWOG (Vonovia) and GESIBA as Vienna builders: their pages opened gave no unit figures; not listed.
- Quartier Belvedere: which developer or investor holds each plot sold by ÖBB is not established.
- Gasometers A-D and Austria Campus: owners blank; a Grundbuch extract per Einlagezahl (EUR 4.89) would answer.
§
Sources
- Grundbuchsabfrage über das Internet (fees table) — oesterreich.gv.at, Federal Ministry of Justice · openA
- Hilfsverzeichnisse (owner index needs a legal interest) — oesterreich.gv.at, Federal Ministry of Justice · openA
- Einsichtnahme und Abfragen bei Gericht (EUR 19 at court) — oesterreich.gv.at, Federal Ministry of Justice · openA
- Hauptbuch (A, B and C sheets) — oesterreich.gv.at, Federal Ministry of Justice · openA
- Grundbuchseinsicht ('In das Grundbuch kann jede Person Einsicht nehmen') — oesterreich.gv.at · openA
- Aufgaben (tasks; 105 heritage properties transferred in 2000) and Imperial Palace Vienna at a Glimpse — Burghauptmannschaft Österreich · openA
- Schönbrunn Castle and Gardens (property page) — Burghauptmannschaft Österreich · openA
- DC Tower in Vienna fully leased — Deka Immobilien · openA
- Wolf Theiss advises Art-Invest Real Estate in the acquisition of the Millennium Tower — Wolf Theiss · openA
- Millennium Tower, Vienna (project page) — Art-Invest Real Estate · openA
- History of the Vienna International Centre — United Nations Office at Vienna · openA
- ÖBB-Immobilienmanagement GmbH (home page) — ÖBB-Immobilienmanagement GmbH · openA
- Wien Hauptbahnhof (project page) — ÖBB-Immobilienmanagement GmbH · openA
- Zahlen, Daten, Fakten (as of 31 Dec 2025) — ÖBB-Immobilienmanagement GmbH · openA
- Antrag Ltg.-330/XX-2024: Flughafen muss vom Rechnungshof geprüft werden können — Landtag von Niederösterreich · openA
- Über uns — Stadt Wien – Wiener Wohnen · openA
- Über uns — Bundesimmobiliengesellschaft m.b.H. (BIG) · openA
- Portfolio — Bundesimmobiliengesellschaft m.b.H. (BIG) · openA
- Kennzahlen (2025) — SOZIALBAU AG · openA
- Gebäude nach Eigentumsverhältnissen und Gemeindebezirken 2011 und 2021 (Jahrbuch table 2.1.2, from Statistik Austria Registerzählung) — Stadt Wien – Wirtschaft, Arbeit und Statistik (MA 23) · openA
- S IMMO AG acquires Vienna Twin Towers (ad hoc, 11 Jul 2023) — S IMMO AG · openA
- About us — CPI Europe AG (formerly IMMOFINANZ AG) · openA
- Shareholder structure — CPI Europe AG · openA
- S IMMO successfully sells large office buildings in Vienna (21 Jul 2017) — S IMMO AG · openA
- Portfolio — CA Immobilien Anlagen AG · openA
- Facts & Figures (ARE annual report 2025) — ARE Austrian Real Estate GmbH · openA
- Gemeindebau NEU Bernoullistraße (27th new council block; programme totals) — Stadt Wien · openA
- Imperial Palace Vienna at a Glimpse — Burghauptmannschaft Österreich · openA