2026 Property Tax (Grundsteuer) Update for Prospective Owners
The three categories: Grundsteuer A, B, and C
German property tax is split into three categories:
- Grundsteuer A ("agricultural") applies to agricultural and forestry operations.
- Grundsteuer B ("built") is the standard category for developed and undeveloped residential and commercial properties – this is where most private buyers and self-builders fall.
- Grundsteuer C is new: since January 1, 2025, municipalities in states using the federal model can tax building-ready but undeveloped land separately, at a significantly higher rate. It's based on the 2019 law amending the property tax act to mobilize building-ready land ("Gesetz zur Änderung des Grundsteuergesetzes zur Mobilisierung von baureifen Grundstücken für die Bebauung"). The goal is to make land speculation unattractive and get more building land actually used for housing.
Why this matters for prospective owners
If you own or want to buy undeveloped, building-ready land, it's worth checking whether your municipality applies Grundsteuer C – and by when development is expected in order to avoid the higher charge. The rule mainly targets land that has been building-ready for a while without being developed; for freshly acquired land with a concrete building plan it's usually not an immediate concern, but it should be part of your financing plan in case construction gets delayed.
The Hamburg example
Hamburg doesn't use the federal model but its own value-independent "Wohnlagenmodell": land and building areas are multiplied by fixed equivalence factors (€0.04/m² for land, €0.50/m² for buildings) instead of relying on standard land values – so expensive city-center locations don't automatically mean a higher tax. Since January 1, 2025, Hamburg applies these rates:
| Category | Rate |
|---|---|
| Grundsteuer A (agriculture/forestry) | 100% |
| Grundsteuer B (residential/commercial) | 975% |
| Grundsteuer C (building-ready, undeveloped) | 8,000% |
The extremely high rate for Grundsteuer C is meant to specifically push owners to actually develop vacant building land rather than holding it for speculative reasons.
Municipal rates vary widely
Regardless of the state, your actual property tax bill depends heavily on your municipality's rate (Hebesatz), which each municipality sets and periodically adjusts on its own. Two properties with an identical assessed property tax value can therefore be taxed very differently in neighboring municipalities. If you're considering a plot of land or an existing property, ask the relevant city or municipal administration directly for the current rate rather than relying on general comparison figures.
Constitutional complaint against the federal model
On February 27, 2026, the property owners' association Haus & Grund Deutschland and the German Taxpayers Federation (Bund der Steuerzahler Deutschland), together with two test-case plaintiffs, filed a constitutional complaint against the federal Grundsteuer model at the Federal Constitutional Court (case no. 1 BvR 472/26), based on a case from Berlin. The Federal Fiscal Court (Bundesfinanzhof) had ruled on November 12, 2025 that the federal model was, in principle, constitutional, but the plaintiffs still consider the assessment basis of land values and notional rents unsuitable. The federal model applies in nine states (Berlin, Brandenburg, Bremen, Mecklenburg-Vorpommern, North Rhine-Westphalia, Rhineland-Palatinate, Saxony-Anhalt, Schleswig-Holstein, Thuringia); Saarland and Saxony also use it, with adjusted tax assessment figures. The five states with their own models (Bavaria, Baden-Württemberg, Hamburg, Hesse, Lower Saxony) aren't directly affected by this particular complaint – though reports suggest the Federal Fiscal Court is expected to rule on those state models at some point during 2026 as well. Nothing changes about your payment obligation until the Constitutional Court reaches a final decision; if you want to keep your own assessment open to challenge, get individual tax advice.