Fungus and mold in a student’s apartment in Gdańsk: What to do?

Where in Gdańsk is it easiest to find a “stowaway”?

What to do in chronological order?

If you notice a fungus, do not clean it with Domestos on your own – you will destroy evidence and expose yourself to the charge of property destruction. Follow this plan:

1. Photographic documentation (Day 1): Take photos of the blooms with a newspaper or phone displaying the date attached. Also take a photo of a hygrometer (buy it for 20 PLN if you don’t have one) showing humidity above 60%.
2. Written defect report (Day 1): Send an email and SMS to the owner. In 2026, courts honor digital communication, but just to be sure, also send a registered letter to the address from the lease agreement.
3. Verification at USOS and the Career Office: Check if your university (PG, UG, MUG) offers free legal advice for students. Many disputes in Gdańsk end with a settlement of one letter with a lawyer’s stamp.
4. Call for Defect Removal (Day 7): Give the owner 3-7 days for professional fungus removal and removal of the cause (e.g. gutter repair or installation of diffusers).
5. Submitting an application for rent reduction: As long as the defect exists, you have the right to pay less. In Gdańsk, the standard is to demand a 20-50% reduction for a room with a mushroom.
6. Termination of the contract (Finality): If the fungus threatens your health (doctor’s opinion or visible dust), you give notice of termination immediately on the basis of Article 682 of the Civil Code.

Physics of buildings on the Baltic Sea

Living in the coastal belt, from Brzeźno to Jelitkowo, is associated with extremely high relative humidity, which rarely drops below 80% in autumn and winter. In the academic year 2026/2027, with increasingly tight PVC windows installed in Gdańsk blocks, the phenomenon of a “thermos” occurs. If your room is located in a wavy ship at Obrońców Wybrzeża Street or in a skyscraper in Zaspa, you need to understand the concept of dew point.

With insufficient ventilation, water vapor from your breath, cooking pasta or drying clothes condenses on the coldest parts of the walls (usually in the corners by the windows). In Gdańsk, the wind from the Bay cools the gable walls of buildings much faster than inland. If the owner has not installed hygrocontrollable vents, the fungus will appear not because you do not take care of cleanliness, but because the building does not breathe. As a student of Gdańsk University of Gdańsk Tech or University of Gdańsk, you have the right to require the landlord to adapt the premises to technical standards – including ensuring efficient mechanical or gravity ventilation.

Handover protocol: How to describe walls

This is the most common trap in the Tri-City: you enter an apartment in Wrzeszcz in September, the walls are white and smell of fresh paint. In November, a black coating comes out from under the paint. If your handover protocol says “walls in perfect condition”, the owner will accuse you of negligence in June 2027 and deduct PLN 2000 from the deposit for painting and fungus removal.

How to protect yourself?

1. Touch Test: During the inspection, put your hand on the corners of the exterior walls. If you feel damp or cold, write in the protocol: “the walls in the corners show low temperature, risk of freezing”.
2. Smell verification: The smell of mustiness in built-in wardrobes is a sure sign that the fungus is already there, but has been covered. Note this in the USOS system (if you rent a dormitory) or in a private contract.
3. Photos with date stamp: Use an app that puts an indisputable date and GPS location on the photo (e.g. Wita Stwosza Street, Gdańsk). Take a photo of the ventilation grilles – if they are covered with wallpaper, you have proof of a structural error of the premises as early as day zero.

Chimney sweep expertise

Many owners in Gdańsk ignore the annual chimney sweep inspections, which are mandatory. If a fungus has appeared in your apartment in Żabianka or Sopot , demand from the landlord to see the last protocol from the inspection of chimney ducts.

If it turns out that the ventilation is faulty (e.g. lack of draught), you have proof that the fault lies with the building manager or the owner. In 2026, the jurisprudence of the courts in Gdańsk is very favorable for students: if the cause of the fungus lies in the infrastructure (lack of draught, leaky roof, cracked gutter on the façade), the owner not only has to remove the damage, but has no right to demand any subsidies from you. What’s more, you can apply for compensation for damaged clothes or leather shoes, which can get moldy in Gdańsk’s basements and ground floors in two weeks.

Professional dehumidification and ozonation in Gdańsk – service costs 2026/2027

If the owner agrees to the repair, make sure that it is not just a “repainting”. In conditions of high humidity at Grunwaldzka Avenue or in the vicinity of Marynarki Polska Street, professional mechanical drying is necessary.

Real market rates in the Tri-City (2026)

• Rental of a condensation dryer: 50 – 80 PLN / day (need min. 7 days).
• Ozonation of the room (spore elimination): 300 – 500 PLN per session.
• Chemical fungus removal with furasol: 400 – 700 PLN.
• Mycological examination (determination of the type of fungus): 500 – 900 PLN.

Remember that during dehumidification, the electricity meter spins like crazy (the dehumidifier consumes approx. 0.5-1 kW/h). It is in your interest to write down the Energi meter reading before turning on the machines and to demand reimbursement of the cost of the energy consumed from the owner. It is responsible for maintaining the premises in a usable condition, and dehumidification is not your whim, but a technical necessity.

Effect of mycotoxins on concentration and academic performance

As a student of medicine at MUG or biology at UG, you should know that living in a fungus-infested room is not just a runny nose. Hyphae fungal spores secrete aflatoxins, which have a strong neurotoxic effect.

In the academic year 2026/2027, learning takes place largely in a hybrid way. By spending 12-14 hours in an infected room with a laptop, you expose yourself to the so-called Brain Fog . It manifests itself in difficulty remembering, headaches and chronic fatigue. If your grade point average has suddenly dropped, and you feel perpetually sleepless despite spending the night in bed by a fungus-infested wall in Oksywie, it’s not the fault of the difficult material. It is the result of poisoning the body. In such a situation, your first step should be to evacuate to the Gdańsk University of Technology Student Campus or the main library, and the second – to formally terminate the lease agreement due to a threat to life and health.

How to survive the winter in Gdańsk without fungus?

If your apartment is on the verge of the norm, and you don’t want to get into a conflict with the owner, apply the Gdańsk decalogue of the fight against dampness:

• Impact ventilation: 5 minutes with the window wide open with the radiators off, instead of micro-tilt all day.
• Digital Hygrometer: It must stand on your desk. If the humidity exceeds 60%, turn on the dehumidifier or intensify ventilation.
• Moisture absorbers: The tablet ones from DIY stores (e.g. OBI at Przywidzka Street) are good for a closet, but not for a 15m2 room. Only an electrical device will help here.
• Oil heater: If the administration is stingy with city heating, heat the room. Warm air has a larger water capacity, which prevents steam from condensing on the walls.

Don’t let the fight against the fungus take away the joy of studying in the Tri-City. Be assertive, document every dot on the wall , and remember that your ELS card doesn’t make you a second-class citizen in your relationship with your landlord. If the problem overwhelms you, look for a new place near the loop in Siedlce or in upper Sopot – where the buildings stand on sandy, dry ground.

Questions from Gdańsk students

How to force the owner in Gdańsk to remove the fungus?

Most landlords in Wrzeszcz or Żabianka use the “gaslighting” strategy, claiming that mold is the fault of a student who dries laundry in his room. To break it, you need to operate with hard facts. First, refer to the warranty for defects of the premises. Secondly, offer a visit to an appraiser – the very fact that you know about the existence of such experts often prompts the owner to act. In 2026, you can also threaten to report the matter to the construction supervision or the sanitary inspectorate (Voivodeship Sanitary and Epidemiological Station in Gdańsk at Hołdu Pruskiego Street), which is a paralyzing vision for an owner renting an apartment without reporting it to the Tax Office.

Can I stop paying rent for a mold-infested room?

Never stop paying rent completely without a court judgment or written consent from the landlord, or you will risk eviction due to your fault and loss of status in occasional rentals. However, you can legally demand a reduction in rent for the duration of the defect. It is best to do this by means of a statement about deducting the amount of the reduction from the next transfer, but on the condition that you have previously formally called on the owner to remove the fungus and set a deadline for him. In the Gdańsk student reality, if the room is unusable (e.g. a fungus has taken over the wall by the bed), you can demand a refund of 100% of the rent for that particular module, but still paying for utilities.

How to prove that the fungus in the tenement house in Wrzeszcz is not my fault?

The key is to demonstrate that the fungus is a design defect. Check if the wall is cold to the touch and if mold appears in the corners (thermal bridges) or near the floor (capillary moisture). If you live in a “wrzeszczanka” on the ground floor, the cause is almost certainly the lack of vertical insulation of the building. Do a simple test: move the wardrobe 10 cm away from the wall. If the fungus grows despite this, the owner’s argument about the “lack of circulation” falls. In 2026, it is also worth downloading data on air humidity in Gdańsk from the weather service – if it rained and blew from the sea for a week, and the administration did not turn on the GPEC node, the fault lies with the facility manager, not yours.

Is a fungus in the room a basis for breaking the lease agreement immediately?

Yes, Article 682 of the Civil Code is your greatest ally here. It clearly states: if the defects of the leased premises are of such a kind that they endanger the tenant’s health, the tenant may terminate the lease without observing the notice periods, even if he was aware of the defects at the time of signing the agreement. In 2026, courts treat mold (especially droplet and black mold) as a real oncological and respiratory threat. In order for the termination to be effective, you must have proof (photos) and, preferably, a certificate from a doctor (it can be from a student clinic at MUG) that being in such conditions worsens your health (e.g. intensifies allergies or asthma).

Who pays for fungus removal – the student or the landlord?

The landlord always pays for the removal of the cause of fungus formation and professional fungus removal (ozonation, fogging, plaster removal). This is treated as a major repair of the premises, necessary to keep it in a usable condition. The student is only responsible for minor outlays (e.g. replacing a light bulb), and the fungus is not one of them. The exception is when the landlord proves gross negligence in court (e.g. sealing the ventilation grilles in the bathroom in a block of flats in Żabianka), which in practice is very difficult to prove if you prove that you used the apartment normally.

What are the health effects of an apartment with mold for a student?

Living with a fungus is not only an aesthetic problem, it is a daily inhalation of mycotoxins. Students in Gdańsk, especially those with reduced immunity due to session stress, often report chronic headaches, sinusitis, cough and chronic fatigue. If you study at the Medical University of Gdańsk, you know that Aspergillus or Stachybotrys spores can lead to serious lung diseases. Do not ignore these symptoms – if you feel better after a weekend spent at your family home outside Gdańsk, and when you return to your room in Zaspa, the symptoms return, this is an obvious signal that your district is contaminated.

Where to look for free legal assistance in disputes over fungus in Gdańsk?

Students of all universities (Gdańsk Tech University, MUG, AMW) are entitled to assistance at Free Legal Aid points run by the City of Gdańsk (e.g. in the building of the Municipal Office at Nowe Ogrody Street or in local branches in Orunia and Oliwa). In addition, the UG Students’ Government runs an intervention office that helps in the analysis of lease agreements. If you have a valid ELS card, you can also contact the Student Legal Clinic at the Faculty of Law and Administration of the University of Gdańsk – there, older colleagues under the supervision of professors will help you formulate a lawsuit for the return of the deposit.

Does the energy performance certificate of a building have an impact on the formation of mould?

Directly, yes. From 2024 and 2025, the certification regulations are very strict. A building with a low energy class is a cold building, with the so-called thermal bridges at the joints of the slabs (especially in the construction of the 1970s in Przymorze). In such places, water vapor from your breath and cooking condenses on the cooled wall, which is an ideal breeding ground for the fungus. When signing a lease agreement in 2026, always ask about the heat transfer coefficient of the partitions – if the landlord is spinning, it’s a sign that you’ll be struggling with moisture in winter.

How to effectively remove small mold outbreaks with home remedies?

If the problem is fresh and involves only a few centimeters of grout in the bathroom, you can use preparations based on chlorine or hydrogen peroxide available in Gdańsk DIY stores (e.g. Castorama in Oliwa or Leroy Merlin in Galeria Bałtycka). Remember, however, that this is only a “symptomatic treatment”. The mycelium usually sits deep in the plaster or under the wallpaper. Home remedies such as vinegar or tea tree oil are ineffective in the conditions of Gdańsk humidity (often exceeding 80% outside) and can only discolor the wall, which the owner will use to keep your refundable deposit.

Does the tenant’s liability insurance cover damage caused by fungus?

Standard tenant liability insurance, which is required by most apartment owners in Gdańsk in 2026 for occasional rentals, protects you from damage that you cause to the landlord (e.g. flooding your neighbor). However, it does not cover the costs of removing the fungus, which is a defect of the property. What’s more, if the landlord tries to accuse you of mold in the apartment, your policy may refuse to pay compensation to the landlord, deeming it to be natural wear and tear on the building or a structural defect. Paradoxically, this is good news for you – the insurer will send its own appraiser who can confirm that you are not at fault.