Press
Everything you need about wohnwahn, on one page.
wohnwahn.at is a free, independent property search for Austrian cities and their surroundings, run as a private project by two founders. What sets it apart from the big portals is not the number of listings, but the depth of the location data. Here are the figures, the sources, the story angles and the images you can work with.
We answer queries the same day. kontakt@wohnwahn.at
01The figures
As of 20 September 2026, measured when this page was loaded
4,695
listings online
26
connected providers
9
cities and their surroundings
476
neighbourhood pages
These figures are read from our database every time this page is loaded. We do not hard-code a number here that will be wrong in four weeks. The listing count comes from the same query as the counter on the search page, so it cannot differ from it.
How the inventory is growing
Every week we record how many listings are online. Measured since 24 August 2026. We did not count it before that, which is why the curve starts there and not earlier. The vertical lines mark the days a new city went live.
| Week | Listings online |
|---|---|
| 24 August 2026 | 4,115 |
| 31 August 2026 | 4,132 |
| 7 September 2026 | 4,762 |
| 14 September 2026 | 4,682 |
The same figures, machine-readable (JSON)
Vienna & surroundings · Graz & surroundings · Salzburg & surroundings · Linz & surroundings · St. Pölten & surroundings · Innsbruck & surroundings · Bregenz & the Rhine valley · Klagenfurt & surroundings · Eisenstadt & surroundings
02The facts at a glance
- Founded
- June 2026
- Operator
- A private project, not a company. The media owner under §25 of the Austrian Media Act is Julien El-Bahy.
- Team
- Two founders, no employees.
- Funding
- Self-funded. No investors, no commissions, no paid placements.
- Based in
- Mödling near Vienna.
- Spelling
- “wohnwahn” is written in lower case, including at the start of a sentence. The address is wohnwahn.at.
03Ready to copy
Three lengths, all approved. Please use as they are, or shorten them, but do not sharpen them.
One sentence
wohnwahn.at is a free, independent property search for Austria that rates every location using data no portal shows.
One paragraph
wohnwahn.at is a free, independent property search for Austrian cities and their surroundings. For every address it shows hours of sunlight per floor, official heat exposure, traffic noise, flood zones, green space and real travel times by public transport, bike, car and on foot. It is run as a private project by Julien El-Bahy and Christoph Dernberger, without commissions and without paid placements.
In full
wohnwahn.at is a free, independent property search for Austrian cities and their surroundings, run as a private project by Julien El-Bahy and Christoph Dernberger. For every address it shows data that appears in no listing: hours of sunlight per floor from an in-house shading calculation on a 3D city model, official heat exposure, traffic noise, flood zones, green space and real travel times. From that data and the priorities of the person searching, it derives a "fit", a traceable match rather than a marketing score. Anyone who has set no priorities gets no verdict, only facts. Listings arrive exclusively through interfaces, directly from agents, developers and private owners. Portals are deliberately not scraped. There are no commissions, no paid placements and no ranking for money.
04What no listing tells you
Every figure on wohnwahn states where it comes from and when it was measured. Where we could not measure, we say so instead of estimating.
- Sun and shading
- Hours of sunlight per floor and month, calculated on an in-house 3D city model including neighbouring buildings and terrain.
- Heat
- The City of Vienna urban climate analysis, the City of Graz climatope map, otherwise a model built from Copernicus data. The origin is stated for every value.
- Noise
- Official noise maps under the EU Environmental Noise Directive, day and night values.
- Accessibility
- An in-house routing engine using the timetables of all nine Austrian transport associations, plus bike, car and walking. Real travel times, not straight-line distance.
- Flooding
- Hazard zones and flood areas from the official INSPIRE services.
- Green space and trees
- Tree cover and green areas from Copernicus data and OpenStreetMap.
- Zoning
- Land-use plans of the federal states, evaluated per address.
05Milestones
These are the days each market went public. The first went online with the project launch in June 2026; the other five followed within three weeks.
- 28 June 2026Vienna & surroundings
- 16 August 2026Graz & surroundings
- 19 August 2026Salzburg & surroundings
- 26 August 2026Linz & surroundings
- 28 August 2026St. Pölten & surroundings
- 3 September 2026Innsbruck & surroundings
Klagenfurt is being built and is not public yet. A market only goes live once its entire data chain has been calculated and checked.
06Story angles
We calculated this data ourselves and are free to analyse it. Tell us which analysis you need and we will supply the method with it. If the numbers do not support the thesis, we will tell you that too.
Heat and rent
How do supply and price spread across the areas a city officially classifies as overheated?
The dark ground floor
How large is the difference in sunlight hours between the ground floor and the fourth floor, in summer and in December?
Noise in the offering
What share of the flats on offer sits above the thresholds of the noise maps?
What a listing leaves out
Comparing what a listing text promises with what the location data actually shows.
Important for context: we analyse our own inventory, not the entire market. Wording such as "of the flats on wohnwahn.at" is correct, "of Vienna's flats" would not be.
07How we work
- No scraping. Listings come through interfaces, directly from agents, developers and private owners.
- No money involved. No commissions, no paid placements, no ranking for payment. wohnwahn is free for searchers and providers alike.
- A gap stays a gap. “Not measured” is never rounded up to “unremarkable”.
- Addresses stay protected. The map deliberately shows an approximate location; exact coordinates never leave our server.
- No tracking. No Google Analytics, no advertising cookies, no user profiles for third parties.
08Approved quotes
You can use these quotes without asking, attributed by name.
A listing shows you the flat, but not the location. We show both, even when the data contradicts the listing.
We do not want to be another portal counting listings. What interests us is whether a home fits a life, and that can be measured.
09Imagery
Free for reporting about wohnwahn, crediting “wohnwahn.at”. The map credits inside each image are part of the licence and must stay visible. If you need a different motif or another city, write to us and we will render it.
Click to load the full-size version.
- Heat exposure in a neighbourhoodJPG · 1608 × 892 px
Atlas page for Neubau (1070 Vienna). Heat data: City of Vienna urban climate analysis. Base map © OpenStreetMap, © CARTO.
Hours of sunlight per floorJPG · 3192 × 2646 pxSun check at Stephansplatz, calculated on the official City of Vienna building model. Base map © OpenStreetMap, © CARTO.
Noise at an addressJPG · 2128 × 1510 pxVienna noise map. Source: strategic environmental noise map 2022 (laerminfo.at, BMK). Base map © OpenStreetMap, © CARTO.
3D city model with shadingJPG · 3192 × 2646 pxIn-house 3D model. Building heights: City of Vienna and BEV. Base map © OpenStreetMap, © CARTO.
Wordmark, forest greenPNG · 4000 × 612 px, transparentFor light backgrounds.
Wordmark, whitePNG · 4000 × 612 px, transparentFor dark backgrounds.
10Contact
Write to us directly, not to a press office. There is none.
Julien El-Bahy
Founder, product and data. Media owner under §25 of the Austrian Media Act.
julien@wohnwahn.at