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Methodology

How your fit works

The wohnwahn fit shows how well a property matches YOUR priorities. It weighs four pillars (location, price, climate and commute time) by what matters to you, and relies on open, traceable data: the City of Vienna, OpenStreetMap and the real timetable. No paid ranking, no hidden assumptions.

Satellite image of Vienna
Copernicus Sentinel-2, ESA · CC BY-SA 3.0 igo

The four pillars

Location

Daily needs, family, mobility, environment and culture, from concrete places within walking distance. We compute quality across the whole area of a Grätzl (250 m grid) instead of a single centre point: the edge counts too, not just the middle.

Price

Ratio of rent or purchase price to the area median: fair, not just cheap. This pillar is still provisional and visibly marked as such until we connect real market data.

Climate

How cool the location is, plus street trees and nearby water. In Vienna the value comes from the city’s official urban climate analysis, in Graz from the City of Graz’s official climatope map (46 climatope classes, each area with its official description). Outside these two city areas no such map exists, so we calculate it from the official soil sealing data (Copernicus, 10 m): how much a location heats up depends first on how much ground around it is sealed. We calibrated this against 818 cells of the Vienna map and tested it on districts the model had never seen: the level is exactly right in 68 percent of cases and within one level in 90 percent. Every listing shows which of the two applies. Honest limit: the scale is calibrated on Vienna, so in markedly cooler regions the calculated value tends to come out slightly too warm.

Commute

Real travel times to your work address by mode: public transport, bike, car, on foot. Reachable metro/rail/tram/bus lines are counted from OpenStreetMap, the frequency (departures per weekday within walking distance) from the real timetable (Wiener Linien and ÖBB): both visible per Grätzl in the Atlas. For commercial spaces this pillar becomes "Accessibility" and measures footfall: how busy a location is for retail, computed per 250 m cell from the density of shops, food & drink and services, proximity to pedestrian zones and transit frequency. It carries the most weight; climate then counts for less.

The area in categories

The „Location" pillar draws on five scannable categories, each from concrete places within walking distance. We count the figures per category from OpenStreetMap: you can see them per Grätzl in the Atlas.

Everyday & supplies
Supermarkets, bakeries, pharmacies and drugstores within walking distance: density and distance.
Family
Primary schools, kindergartens and playgrounds and how easy they are to reach.
Mobility
Connections and frequency of metro, tram and bus at the address.
Environment
Street trees, nearby water and the share of green and park areas: from the Vienna tree register and OpenStreetMap.
Culture & nightlife
Bars, cafés, cultural venues and nightlife in the surrounding area.

Data sources

DataSource
POI (supermarkets, doctors, pharmacies, schools, kindergartens)OpenStreetMap / Overpass
Travel times by mode (transit, bike, car, foot)our own routing over the OpenStreetMap network
Water & green areasOpenStreetMap
Tree canopy density (surroundings)Copernicus Land Monitoring Service (EEA)
Rent & purchase prices (area)Purchase asking prices per district: immopreise.at / derStandard price index (Dec 2025); per-district rent in preparation·Graz: IMMOXX market survey (purchase) / immomarktanalyse.at (rent)

The official open datasets are licensed under Creative Commons Attribution 4.0 (CC BY 4.0), OpenStreetMap data under the ODbL. In addition, every map names its sources directly in the attribution line.

How up to date

Location, transit, trees, water and building heights are refreshed automatically every month; the official climate analysis whenever the City of Vienna publishes a new release. Live listings with market prices are in preparation. Every place and listing page visibly carries its „as of" date.

Frequently asked questions

Is the fit objective?

The pillars rely on transparent, reproducible data (same data, same result). The weighting is deliberately YOURS: you decide what matters, and the fit shows how well a property matches, not a blanket „good/bad", but a fit for you.

What is already real, what is still coming?

Location, climate and commute time already rely on real, open data (City of Vienna, OpenStreetMap, timetable). The price comparison follows once we connect market data: until then this pillar is visibly marked as provisional.

What do the arrows on the heat map mean?

The colours show heat load (red hot, blue/green cool). Arrows and lines show where fresh and cold air flows (air corridors): these cool the city at night. The source is the City of Vienna official urban climate analysis.

How current is the data?

Location, transit, trees and water refresh automatically every month, the official climate analysis with each new City of Vienna release. Every page shows its update date.

Does paid placement play a role?

No. There is no bought ranking and no preferred listings. The fit depends solely on the data sources named here and your weighting.

Why is the location sometimes only „approximate"?

When a listing does not publish an exact address, we honestly show a soft radius instead of a sharp pin and mark it visibly.

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Last updated: June 2026 · Map tiles © OpenStreetMap contributors