Does the tree house need a building permit

The construction of a tree house is not explicitly regulated in German building law. In general, a tree house falls under the regulations that apply to garden houses of all kinds. An important criterion is the volume of the enclosed space. Other decisive factors are the equipment, construction method, type of use and the location in the garden.

There is room for maneuver in terms of building law

Anyone planning a tree house in the garden often has a playhouse for children in mind. If it is a construction with a platform that is not attached to the ground, it can usually be built without a permit. However, the following factors also play a role in planning

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  • The size that has to be checked from around ten square meters
  • The conversion room, which can be relevant from six cubic meters
  • The supply of electricity, water and possibly even sanitary plant
  • The impact of the impact and shadow throw to the neighboring property

Size and conversion room

The building regulations are regulated in the countries and municipalities. From the 14 federal states, six highest volumes are available for approval-free construction in the outdoor area. Bremen is the strictest and allowed six cubic meters, Rhineland-Palatinate and Schleswig-Holstein ten cubic meters, Baden-Württemberg, Mecklenburg-Vorpommern and Lower Saxony twenty cubic meters. There are no binding requirements in all other countries.

The conversion room is only an indicator and, above all, in borderline cases should always be in demand on the competent building office. The so-called light height also plays a role.

Equipment and use

In most cases, a tree house is designed as a playhouse and not for sleeping or even living in it. In principle, it can be stated that all tree houses that are built to be inhabited require a building permit. The regional building authorities assess the indicators that lead to the definition of living space differently. The following equipment and facilities are assessed:

  • Sleeping places (loose mattresses are a variable matter of negotiation)
  • Water connection
  • Power supply (also self-sufficient, e.g. through a solar system)
  • Lockable windows and doors
  • Heating and heat supply of all kinds
  • Floor, roof and wall insulation

Technical construction and location

A typical aspect of most tree houses is that they are attached to trees. However, there are also mixed forms such as a tree house supported by stilts. With every type of soil sealing like a foundation at the stilt house, a building permit is mandatory.

An important factor that first does not necessarily require the mandatory permit is the appearance and location of the tree house. For example, if it contradicts the local development plan, it can be rejected by the building authority. The nature conservation authority can intervene with old and protected trees. Acoustic and optical effects like shadow thread can be reclaimed by neighbors. In the worst case, a reconstruction can be requested by the authorities. As a minimum distance to the property boundary, three meters must never be undershot.

Tips & Tricks Do you think of the construction of a tree house in the winter no longer existing foliage on deciduous trees. As a result, the optics and possibly also the opinion of your neighbors to your project change.