Federal Fiscal Court Upholds Baden-Württemberg State Property Tax Act: Greater Legal Certainty for Property Owners

In its ruling of April 22, 2026 (Case No. II R 26/24), the Federal Fiscal Court (BFH) issued a landmark decision regarding the new property tax in Baden-Württemberg. The court upheld the constitutionality of the State Property Tax Act (LGrStG BW) and dismissed the appeal filed by a property owner.

The decision provides significant legal certainty for property owners, businesses, and municipalities. At the same time, the BFH makes it clear that the Baden-Württemberg state legislature has broad discretion in structuring the property tax. The land value model may use standardizations and flat rates, even if this leads to deviations from the actual property value in individual cases.

Summary of the Judgment
The case concerned the appraisal of a property in Karlsruhe on which a two-family house was built. The plaintiff challenged the property tax assessment value used to determine her property tax liability. In particular, she argued that the standard land value applied to the entire standard land value zone did not adequately reflect the specific characteristics of her property. According to the explanations provided by the local appraisal committee, only a reduced land value should be applied to the rear portion of the property. Furthermore, she contended that the State Property Tax Act was unconstitutional.

The Federal Fiscal Court (BFH) upheld the decisions of the lower court and dismissed the appeal as unfounded. In the court’s view, the State Property Tax Act is compatible with the Basic Law both in form and substance. A referral to the Federal Constitutional Court or the Constitutional Court of Baden-Württemberg was therefore not necessary.

Key Points of the Ruling
The core of Baden-Württemberg’s property tax model is its exclusive focus on land value. Unlike the federal model, the state model takes into account neither the value of the building nor the actual use of the property nor the income it can generate. The decisive factors are essentially the property’s area and the standard land value.

The Federal Fiscal Court (BFH) considers this model to be constitutionally permissible. Based on the constitutional “opening clause,” the state legislature was authorized to create an independent valuation model. In doing so, it is not obligated to individually consider all circumstances affecting the value of a property. Rather, generalizing and flat-rate regulations are permissible, provided they remain within constitutional limits.

The BFH specifically emphasized that, pursuant to § 38(1) of the Baden-Württemberg State Property Tax Act (LGrStG BW), the standard land value is generally to be applied on a flat-rate basis and without individual adjustments to all properties within a standard land value zone. Notes or explanations from the expert committee indicating that reduced land values might be appropriate for certain areas of a property do not automatically lead to a different tax assessment.

Proof of a lower land value is possible only within the legal framework set forth in § 38(4) of the Baden-Württemberg State Real Estate Tax Act (LGrStG BW). According to this provision, the proven actual value must be more than 30 percent below the applicable standard land value. Only under these conditions may a different valuation be considered.

The Federal Fiscal Court (BFH) does not view this as a violation of the general principle of equality under Article 3(1) of the Basic Law (GG). The inaccuracies inherent in any categorization are deemed acceptable in light of the significant administrative simplification achieved. Furthermore, the decision not to take buildings or individual property characteristics into account does not exceed the legislature’s discretion.

Practical Relevance
The ruling has significant practical implications for property owners in Baden-Württemberg. It confirms the legal basis for the state model, which has been in effect since 2025, and removes major uncertainties regarding its constitutionality.

For companies with properties used for business purposes, the ruling provides planning certainty. The same applies to real estate companies, housing associations, and private property owners. In the future, the mere fact that an individual property has a lower economic value than the assessed standard land value will generally not be sufficient to successfully challenge the valuation.

Anyone seeking a lower valuation must meet the legal requirements of § 38(4) of the Baden-Württemberg State Real Estate Tax Act (LGrStG BW) and demonstrate a correspondingly lower land value. The evidence required for this can generally only be provided through a qualified expert opinion. Whether the associated effort is economically worthwhile should be carefully evaluated.

At the same time, the ruling makes it clear that, according to the supreme court’s decision, appeals based solely on general constitutional concerns regarding the State Property Tax Act now have little chance of success. While it cannot be ruled out that the Federal Constitutional Court may address this issue in the future, the Federal Fiscal Court’s decision serves as the authoritative guideline for tax practice for the time being.

Fazit
In its ruling of April 22, 2026, the Federal Fiscal Court affirmed the constitutionality of Baden-Württemberg’s State Property Tax Act and reinforced the land value model in effect there. The legislature was entitled to opt for a simple and standardized valuation method, even if this does not reflect the actual market value of a property in individual cases.

For property owners, this means, above all, greater legal certainty. At the same time, the requirements for successfully challenging property tax assessment notices have become more stringent. A different valuation can only be considered within the scope of the statutory exceptions expressly provided for by law.

Companies and property owners should therefore not review existing property tax assessment notices solely from a constitutional perspective, but should, in particular, have them examined to determine whether the statutory requirements for proving a lower land value are met in each individual case. Seeking tax advice early on can help ensure that existing planning options are utilized appropriately and that unnecessary appeals are avoided.

Additional Author: Filip Stojanoski