Before you buy a flat in Vienna: check light, heat and noise
The viewing lasts a quarter of an hour. Azima calculates what you cannot see there: sun per room in December, summer heat, noise at the facade.
- ✓ Card details only with Paddle (PCI DSS certified)
- ✓ No account
- ✓ Invoice by e-mail
- ✓ Money back if the report cannot be created
- ✓ Floor plan stays in your browser
- ✓ Official City of Vienna data
What a viewing does not show
Seven questions a November afternoon leaves open — and what the report answers.
Hours of direct sun per room on 21 December, June and March — with the gaps the houses opposite cut into the day.
The window direction plus the measured height of the facade opposite. A south window facing a 22-metre wall is not a south window.
A modelled summer-heat level for the address, from building form, green, street trees, water and elevation — never a fake temperature.
Street noise from the official noise map at the address, and aircraft noise from its own series of overflights.
Zoning and building class from the city’s plan — the legal maximum height, not today’s view.
Flood, heavy rain, contaminated sites, radon, earthquakes and geology — each with the source named.
Sun load and plant light on the floor plan: where the desk stays cool, where the lemon tree thrives.
What it costs — measured against what is at stake
Land transfer tax (3.5 %) and land registry fee (1.1 %) alone come to €23,000 on a €500,000 flat. The report costs €19 and answers the question that cannot be changed afterwards: what this flat is like in December, in July and at six in the morning.
Ask the agent for it
You can buy the report yourself — or ask the agent for it. An agent who knows the flat has it within a minute. One sentence is enough:
Is there an Azima report for this flat? I would like to see the hours of sun per room in December, the summer heat and the noise at the facade.
A measured disadvantage is never removed — not even when the agent pays. That is exactly why the question is fair.
How you get the report
Enter the address. In Azima, free: the house, its neighbours from official heights, the path of the sun, the hours per floor.
Paste the floor plan. Copy it from the listing. Azima reads rooms and windows in your browser — the file never leaves it.
Buy the report. “Buy exposé · €19” opens Paddle’s checkout. The PDF is created on your device; every page carries the Azima seal. During the beta it is free.
The Azima report is a PDF for one Vienna flat, meant for the time between the viewing and the purchase contract. It gives, per room, the hours of direct sun on 21 March, June and December, calculated from the floor plan, the window direction and the officially measured heights of the neighbouring buildings; plus summer heat (modelled), street noise from the noise map, aircraft noise from its own measurement series and information from 13 official sources such as zoning, flood, heavy rain, contaminated sites and radon. It costs €19 once including VAT, without an account; the light check before it is free. A measured disadvantage is never removed. The report is not an expert opinion.
Frequently asked
What does the report cost?
€19 once, including VAT, for one flat (one address, one floor). The light check before it — house, path of the sun, hours per floor — is free. During the beta the report is free as well.
Is the report an expert opinion?
No. Azima is software that calculates a model from open data. It answers the questions before an expert opinion — is the viewing worth it, does “bright” hold in December. A certificate of insolation under ÖNORM is a different, signed document.
Do I need the floor plan?
For hours per room, yes — copy it from the listing. Without it Azima shows the hours per floor and uses an example plan that is clearly marked as an assumption.
Can the seller or agent remove a disadvantage?
No. A measured disadvantage is never removed, only explained better — aircraft noise, shading, summer heat stay in the report, whoever pays for it.
Does it also help when renting?
Yes. The questions are the same; only the contract is shorter.
Do I need an account?
No. After buying, Azima shows your Azima key — twelve characters. With it you open the purchase on another device; it is also printed in the PDF.
Can I compare two flats?
Yes. “Object report & comparison” in the exposé sheet puts two properties side by side on one sheet.
What about a refund?
If the report could not be created you get your money back. Otherwise the right of withdrawal for a single report ends once it has been created and downloaded at your request; you confirm this before buying.
All prices · The free location report · For agents: Premium · Terms and refunds
Sources: City of Vienna Open Data (roof model LOD2.1, zoning, noise map 2022 and others, CC BY 4.0) · sun position calculated astronomically · land transfer tax: GrEStG section 7 · registry fee: Court Fees Act TP 9.