Mistakes when buying an apartment in Vienna rarely look dramatic at the moment you make them. Signing a Kaufanbot “just so you don’t lose the place”, skipping the minutes of the owners’ meeting or drawing up a budget “by eye” all seem like minor things, but later they turn into €5,000, €10,000 or €30,000 of unplanned costs. Taxes, fees and services alone add around 10% to the price of an apartment in Austria. On top of that, since 1 July 2026 buyers once again pay the Grundbuch registration fees that most people buying a home to live in had been exempt from for the past two years.
In this article we go through the seven mistakes we see most often at first consultations: from budget and financing to checking the building’s documents and the permit for non-EU citizens. We have grouped them by stage of the purchase, so you can see at which step each trap usually springs. At the end you will find a worked example with the Petrenko family that shows what these mistakes cost in real money. All figures and legal rules are current as of October 2026.
Budget and financing: where the first 10% disappears
Mistake No. 1: counting only the price of the apartment. The listing shows you the purchase price, but the notary’s statement will show a different amount. On top of the price come the property transfer tax, two registration fees, the agent’s commission and the cost of drawing up the contract. Together this is usually 9–11% of the price, and the bank won’t finance it either: you pay this money from your own savings. It is especially important to redo your budget if you were already planning the purchase in spring: the exemption from Grundbuch fees for owner-occupied homes up to €500,000 ended on 30 June 2026 and has not been extended. Below you can see what the additional costs of buying an apartment for €300,000 with a €240,000 loan are made up of.
| Cost item | Rate | Amount, € |
|---|---|---|
| Grunderwerbsteuer (property transfer tax) | 3.5% of the price | 10,500 |
| Registering ownership in the Grundbuch | 1.1% of the price | 3,300 |
| Registering the mortgage (Pfandrecht) | 1.2% of the loan amount | 2,880 |
| Agent’s commission | up to 3% + 20% VAT | up to 10,800 |
| Notary or lawyer, escrow (Treuhand) | approx. 1–3% | ≈ 4,500 (1.5%) |
| Total | ≈ 10.7% | ≈ 31,980 |
Please note: the “whoever hires the agent pays” principle (Bestellerprinzip) applies in Austria only to renting homes. When buying, the buyer and the seller usually each pay the agent their own share, and you should agree its amount in writing before the first viewing.
Mistake No. 2: signing a Kaufanbot without confirmed financing. Many people see the Kaufanbot as a non-binding expression of interest, but in fact it is a binding offer: if the seller accepts it within the deadline, the purchase contract is considered concluded. Simply “changing your mind” is no longer an option: the seller can demand that you go through with the purchase or claim damages. Only a consumer who signed the offer on the day of the first viewing has the right to withdraw within one week under § 30a KSchG. That is why, before signing, you should have a written loan commitment from the bank (Finanzierungszusage) or at least a clear financing condition with a specific loan amount and deadline. How exactly to word such a condition is explained in detail by lawyers, and it is best to leave the final wording to a lawyer.
As for the banks, the KIM regulation (KIM-Verordnung) with its strict limits expired back on 30 June 2025. However, the supervisory authority FMA expects banks to keep following the previous benchmarks: a loan of up to 90% of the property value, repayments of up to 40% of net income and a term of up to 35 years. In practice, most banks expect 20% of your own funds plus full coverage of the additional costs, and conditions for non-EU citizens are often stricter. We explain how to prepare for the talk with your bank in our article on how to get a mortgage in Austria.
Checking the apartment and the building: what you can’t see at a viewing
Mistake No. 3: not reading the Grundbuch extract. The land register shows not only the owner but also every encumbrance on the apartment: the previous owner’s mortgages, bans on sale or encumbrance, easements or a third party’s right of first refusal. A typical case: the apartment is advertised with a storage room or a parking space, but in the Grundbuch they are not registered as belonging to it, and the buyer actually pays for something they will not legally own. The official portal oesterreich.gv.at recommends ordering a fresh extract right before the deal, because an old one may not contain new entries. We explain how to read sections A, B and C in our guide “Grundbuch in Austria: what is it?”. The seller’s existing mortgages are no reason to walk away from the deal: they are paid off from the purchase price through a notary’s or lawyer’s escrow (Treuhand), which is why the money is never transferred to the seller directly.
Mistake No. 4: ignoring the owners’ association documents. When you buy an apartment as Wohnungseigentum, you become a co-owner of the whole building, including its roof, façade and risers. Under § 31 WEG the owners build up a repair reserve (Rücklage), and since 1 January 2026 the minimum contribution after indexation has been about €1.12 per m² per month. But the minimum does not guarantee the reserve is enough: if the owners’ meeting has already approved a €400,000 façade renovation and the fund holds only €60,000, the difference is split among the owners as a special levy (Sonderumlage). Before signing the offer, ask the seller or the property manager for the following documents:
- a fresh Grundbuch extract and the condominium agreement (Wohnungseigentumsvertrag) with the usable value report (Nutzwertgutachten);
- the minutes of the owners’ meetings for the last 2–3 years and any decisions on renovation work;
- the latest annual statement (Jahresabrechnung) and the current balance of the Rücklage;
- the current monthly charges (Vorschreibung) with Betriebskosten and the reserve contribution;
- a valid energy performance certificate (Energieausweis).
If renovation work has already been approved, this is a strong argument in price negotiations, and who bears these costs should be clearly stated in the contract.
Mistake No. 5: judging the apartment’s condition “by eye” only. High ceilings and parquet floors in a Viennese Altbau often hide old wiring, lead or outdated risers, damp in the basement and gas heating that will sooner or later have to be replaced. You can read about the typical weak points of such properties in our article on buying an apartment in an old building. The Energieausweis gives you an objective benchmark: since 30 May 2026 new certificates are issued on the single EU scale from A to G, and a seller who fails to provide one faces a fine of up to €1,450. The difference in numbers is noticeable: if the heating demand (HWB) is 160 instead of 60 kWh/m² per year, then for a 70 m² apartment that means an extra 7,000 kWh every year. At an assumed price of 12 cents per kWh that is about €840 a year, or €8,400 over ten years, even before any renovation. We have written separately about how to improve the energy efficiency of your home and how much a renovation in Vienna costs.
Legal traps in the deal: tenants and the MA 35 permit
Mistake No. 6: buying a rented apartment without reading the lease. Apartments with tenants are often sold at a discount, and that looks attractive. However, under § 2 MRG an existing main lease passes to the new owner together with the apartment, so you become the landlord on the existing terms. If the lease is open-ended, it can only be terminated through the court on grounds set out in the law, and needing the apartment for yourself is rarely enough in practice. In buildings fully covered by the MRG the rent is also capped, and the Mietpreisbremse 2026 (rent brake) limits its indexation. So before buying, check three things: the term of the lease, the amount of rent and which MRG regime the building falls under. For an investor, such an apartment can be a perfectly sensible choice (more on this in our article on the Vorsorgewohnung), but a family that planned to move in within six months may end up waiting for years. We cover the rights of both sides in detail in our article on tenants’ rights under the MRG.
Mistake No. 7: forgetting the permit for non-EU citizens. Under Austrian law, Ukrainian citizens are third-country nationals, and in Vienna buying property usually requires a permit from MA 35 under the Wiener Ausländergrunderwerbsgesetz (Vienna Foreign Land Acquisition Act). Until it is granted, the contract is “pending and not yet valid”: ownership cannot be entered in the Grundbuch, and if the permit is refused, the deal has to be unwound. The fee itself is small (€76.30 per applicant plus federal fees, according to oesterreich.gv.at), but the real cost of the mistake lies elsewhere: money frozen in the escrow account, an expired interest-rate lock with the bank and months of waiting. There are exceptions (for example, buying jointly with a spouse who holds Austrian citizenship), and whether they apply to your situation is for a lawyer or notary to determine. We describe the procedure step by step in our article on buying property as a foreigner and getting the permit.
Case study: what these mistakes would have cost the Petrenko family
Oleksandr and Maria Petrenko chose a 70 m² three-room apartment in an old building in the 3rd district, Landstraße, for €300,000. They had €80,000 in savings, and the plan seemed simple: a 20% down payment, “around 5%” for costs and a €240,000 loan. Before they signed the Kaufanbot, we recalculated the budget together and requested the building’s documents. The minutes of the 2025 owners’ meeting contained a decision to renovate the façade and roof in 2027, which the repair reserve cannot cover, and this apartment’s share of the special levy (Sonderumlage) is about €9,000.
| Item | How the Petrenkos calculated | The real picture |
|---|---|---|
| Down payment (20%) | €60,000 | €60,000 |
| Additional purchase costs | €15,000 (5%) | €31,980 (10.7%) |
| Own funds needed | €75,000 | €91,980 |
| Left over from €80,000 savings | +€5,000 reserve | −€11,980 |
| Sonderumlage for façade and roof (2027) | not included | ≈ €9,000 |
| Loan repayment (€240,000, 3.5%, 30 years) | €1,078/month | €1,078/month |
| Betriebskosten (≈ €3/m²) + Rücklage (€1.12/m²) | not included | 210 + 78 = €288/month |
| Owner’s monthly costs | €1,078 | €1,366 |
All in all, that is almost €26,000 of costs that were not in the plan (€16,980 of underestimated additional costs and €9,000 of Sonderumlage), plus €288 a month on top of the loan. Had the Petrenkos signed the offer blindly, they would have run out of money before even reaching the notary, and a year later the bill for the façade would have arrived. Had they bought the apartment to live in before 30 June 2026, the exemption from Grundbuch fees would have saved them €6,180 (€3,300 + €2,880), but that window has now closed. Instead, the renovation decision we found became an argument in the price negotiations, and the bank agreed to a slightly larger loan. Please note: the 3.5% interest rate in the calculation is an assumption, and the actual terms depend on the bank, your income and the length of the fixed-rate period.
Conclusion: how to avoid costly mistakes when buying an apartment in Vienna
All seven mistakes have one thing in common: they are cheap to fix before you sign the Kaufanbot and expensive afterwards. A full calculation of the additional costs, the bank’s written position, a fresh Grundbuch extract, the minutes of the owners’ meetings, the Energieausweis, the lease and the MA 35 question settled in advance take a few days. Yet they protect you from losses which, as the Petrenkos’ case shows, can easily reach tens of thousands of euros. We are not saying that every apartment hides a problem, but a checked deal is always more relaxed than an unchecked one.
At VigoImmobilien we support our clients not just up to the viewing, but all the way to signing at the notary. We prepare a market price assessment of the property (Marktpreiseinschätzung), request and analyse the building’s documents before you make an offer, and coordinate legal questions, such as Grundverkehr and the wording of conditions in the Kaufanbot, with a lawyer or notary. You can read more about what this support includes in our article on the services of a real estate agent in Austria.
We will calculate your specific scenario free of charge: the full additional costs, the down payment you need and the monthly costs for the apartment you are considering, and we will put together a list of the documents worth requesting before you sign the Kaufanbot. No obligation. Write to us today: +43 664 998 775 99, [email protected] or on Telegram @vigoimmobilienmanager.
This article contains general information as of October 2026 and is not legal or tax advice. For your specific situation, please consult a lawyer, notary or tax advisor.
