Environmental impact

Environmental impact refers to all negative influences on a property caused by the surrounding area or the property itself-including noise (from roads, railways, aircraft, and industrial sources), air pollutant emissions, electromagnetic fields, soil contamination (contaminated sites), and odor emissions from industry or agriculture. Environmental impacts measurably reduce a property’s market value, give rise to disclosure obligations for sellers, and, in serious cases, may preclude the development or residential use of a property.

Noise and Air Pollution: Impact on Property Value

Noise is one of the most frequently cited factors that reduce property value. The relevant guidelines are DIN 18005 (Sound Insulation in Urban Planning) and the Technical Instructions on Noise (TA Lärm). Road noise exceeding 65 dB during the day (measured at the relevant exposure location) affects quality of life and purchase price; in Nuremberg, residential areas along federal highways, the A3/A9, and the Frankenschnellweg are particularly affected. We recommend that buyers review the city of Nuremberg’s noise maps (publicly available) before purchasing.

In addition to noise, air pollutant emissions are also playing an increasingly significant role in real estate valuation. Elevated NO₂ or particulate matter levels in high-traffic downtown areas can reduce residential appeal and are viewed by buyers-especially families with children-as a deal-breaker. The City of Nuremberg’s Environmental Atlas provides detailed maps of noise and air pollution, which we regularly incorporate into our consultations. Electromagnetic fields from high-voltage power lines or transmission towers are also perceived as disruptive by some buyers, even though no health risks have been scientifically proven when limit values are adhered to.

Contaminated Sites: Soil Contamination and Its Consequences

Contaminated sites refer to soil or groundwater contamination resulting from past uses-such as gas stations, electroplating facilities, the chemical industry, or military activities. They can make a property virtually unsellable and incur significant remediation costs. Under the Federal Soil Protection Act (BBodSchG), the owner is obligated to investigate and, if necessary, remediate the site-even if they did not cause the contamination. When purchasing a property on a potentially contaminated site, a due diligence review with soil analysis is essential.

The costs of remediating a contaminated site can range from a few thousand euros to several million euros, depending on the type and extent of the contamination. Contaminants such as chlorinated hydrocarbons (CHCs), heavy metals, or polycyclic aromatic hydrocarbons (PAHs) require complex soil replacement or pump-and-treat procedures. For potential buyers, this means that knowledge of the soil quality is at least as important as the property’s location and structural condition. We include contaminated site research as a standard part of our purchase consultation.

Environmental Contamination as a Disclosure Requirement in Sales

Sellers are obligated to disclose all known significant environmental contamination to the buyer. This applies to known contaminated sites on the property, ongoing remediation orders from authorities, noise abatement obligations, and groundwater contamination in the vicinity of the property. Anyone who conceals a known environmental contamination is committing fraudulent misrepresentation-the buyer can contest the sale and claim damages, even if a warranty exclusion was agreed upon in the contract.

The duty of disclosure also applies to environmental impacts that do not occur directly on the property itself but significantly affect its use-such as a planned road expansion, an approved industrial park in the neighborhood, or elevated radon levels in certain geological locations. Radon is a relevant issue in parts of Franconia, as the granite formations in northern Middle Franconia can cause elevated radon concentrations in basements. The Radiation Protection Act, which prescribes reference values for radon in living spaces, has been in effect since 2019.

Practical Tip for Property Owners in Nuremberg and Franconia

In Nuremberg, there are a number of former industrial sites and areas of concern stemming from the city’s industrial history (the former MAN site, the Hafen industrial area, and parts of the Kessler site). The Nuremberg Environmental Agency maintains a publicly accessible contaminated sites registry. We recommend that every buyer submit an inquiry to the Environmental Office before signing a contract and, if there is concrete suspicion, commission a soil investigation by an accredited specialist firm-the costs (approx. €2,000-8,000) are money well spent and can prevent significant remediation costs later on.

As a general rule: A known and documented environmental contamination does not have to be an obstacle to purchase-but it must be fairly reflected in the purchase price. We support sellers in marketing contaminated properties or real estate in a transparent and legally compliant manner, and help buyers assess the actual impact of contamination on value.

Frequently Asked Questions

How do I identify contaminated sites on a property?

Initial clues can be found in the property’s usage history (available in the land registry and at the city archives), the environmental agency’s contaminated sites registry, as well as noticeable soil colors, odors, or vegetation patterns. However, a professional soil and groundwater analysis by a consulting firm is required for a reliable assessment. Historical aerial photographs, available from the Bavarian State Office for Digitalization, Broadband, and Surveying, can also reveal past uses.

Who pays for the remediation of contaminated sites?

The party responsible for the contamination is primarily liable. If that party is no longer available or is insolvent, the current owner of the property is liable-even if they did not cause the contamination (liability for condition under the Federal Contaminated Sites Act). When purchasing, an indemnification clause for known contaminated sites or a significant reduction in the purchase price should therefore be negotiated. In individual cases, municipalities or the Free State of Bavaria may contribute to the remediation costs if public interests are affected.

By how much does noise reduce property value?

Studies show that every 1 dB increase in the continuous sound level reduces property value by approximately 0.5-1%. An apartment on a noisy street (70 dB) may experience a 10-20% reduction in value compared to a quiet location (50 dB). We consider noise as a separate depreciation factor in our valuation, basing our assessment on the current noise maps of the city of Nuremberg as well as comparable transaction data from the local market.

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