The three location categories at a glance
Many container projects fail not because of the container’s size but because of where the plot lies. The German Building Code (Baugesetzbuch, BauGB) distinguishes three basic situations, and entirely different standards apply depending on which one fits your plot. This level is called planning-law permissibility: it answers whether anything may be built there at all. It differs from the states’ building regulations law, which governs how something must be built and whether a procedure is required.
| Category | What counts | Containers typically | Note |
|---|---|---|---|
| Area with a development plan (§ 30 BauGB) | The plan’s stipulations: type and extent of use, building lines, ancillary structures | Permissible if it matches the plan; otherwise only via exception or exemption | The most binding standard – look at it first |
| Unplanned inner area (§ 34 BauGB) | Whether the project fits the character of the immediate surroundings | Often possible if type and extent of use are locally customary | The assessment is evaluative and case-specific |
| Outer area (§ 35 BauGB) | Whether the project is privileged and whether public interests are impaired | Far more restrictive; residential and leisure use usually impermissible | Procedure exemption under state law rarely helps here |
This classification is the first step of any assessment. It says nothing about setback areas, fire safety or structural stability – for those, see our article on the container building permit.
Reading a development plan
A development plan (Bebauungsplan) is a municipal statute consisting of a plan drawing, textual stipulations and usually an explanatory statement. Four points matter most for containers:
- Type of use. Purely residential, general residential, mixed, commercial or special area. This determines which uses are permissible at all: a storage container for a business fits a commercial area, but not readily a purely residential one.
- Building lines and building envelopes. The plan delimits the buildable area graphically, and main structures must sit inside it. What is permitted outside is governed by the plan or state law – ancillary structures are often allowed there with restrictions.
- Extent of use. The site occupancy index (Grundflächenzahl, GRZ) states what share of the plot may be built on. A container normally counts towards it, so anyone who has already exhausted the GRZ has a problem.
- Ancillary structures and parking. Many plans add textual stipulations on ancillary structures, heights, materials or roof shapes. Such design requirements can rule out a steel container in practice.
You can inspect the plan at the municipality or planning office; many municipalities publish plans online in a geoportal. If your project does not match the stipulations, an exception (provided for in the plan itself) or an exemption (§ 31 BauGB, tied to narrow conditions) remain. Both are decisions of the authority, not entitlements.
Unplanned inner area
Not every built-up area has a development plan. For plots within a coherently built-up part of a settlement, § 34 BauGB applies. The standard is whether the project fits into the character of the immediate surroundings in terms of type and extent of use, building method and built-on plot area. Access must also be secured and the townscape preserved.
In practice, what already exists nearby is decisive. If the surroundings contain garden sheds, garages and outbuildings of customary size, a container of comparable dimensions may fit in well. A two-storey container structure in a street of small-scale detached houses probably will not.
The distinction between type of use and appearance matters. Purely aesthetic questions – colour, corrugated steel look – are only partly captured by § 34 BauGB, but may be regulated by municipal design statutes. The type of use is central: a storage container is assessed differently from one used for living or commercial work. Because the assessment is evaluative, early coordination with the building authority is worthwhile.
Outer area
The outer area (Außenbereich) is everything lying neither within a qualified development plan nor within a coherently built-up part of a settlement – typically open landscape, fields, forest and scattered locations. The legislature wants it kept free of development in principle, which is why § 35 BauGB is markedly more restrictive.
A distinction is drawn between privileged projects, which exceptionally belong there, and other projects, permissible only if they do not impair public interests. Privileged projects include those serving an agricultural or forestry business as well as certain location-bound or supply-related installations.
| Constellation | Classification (orientation) | What this means in practice |
|---|---|---|
| Container for an active agricultural or forestry business | May qualify as a privileged project | The link to the business must be demonstrated, not merely asserted |
| Container as a weekend house or leisure accommodation | Regularly assessed as an other project | Usually impermissible in practice, as public interests conflict |
| Container as storage on a meadow without a business | Other project | Frequently refused; the risk of urban sprawl is a central concern |
| Container for residential use in the outer area | Other project | As a rule impermissible, regardless of the construction method |
Exemption from procedure under state law does not replace planning-law permissibility. A project can be procedure-free and still impermissible – with the risk of a subsequent removal order.
Further requirements frequently apply in the outer area: nature conservation, landscape or water protection zones, or minimum distances to forests and watercourses. These are examined separately.
Special cases
- Site containers during construction. Containers standing on a site for the duration of approved construction work are often treated differently from permanent structures. The relief is tied to the construction work and its duration; when the work ends, the basis falls away.
- Temporary placement. “Only temporary” is not a legal free pass; what counts is how long and with what permanence the container stands. Anyone leaving it in the same spot year after year will struggle to invoke provisionality later. Some state codes provide for time-limited permits.
- Allotment gardens. Sites governed by the Federal Allotment Gardens Act (Bundeskleingartengesetz) follow their own standards: the act limits garden sheds by size and fittings and rules out suitability for permanent living, and the association’s statutes apply on top. A regular container is therefore often not permitted there.
- Containers that stay mobile. Wheels or a tow hitch do not automatically turn a structure into a vehicle. What matters is the actual stationary use. For more on this, see Tiny house: site and law.
How to obtain clarity
- Classify the location. Ask the municipality whether a development plan exists, whether the plot lies in the inner area or counts as outer area. This is the starting point for everything else.
- Inspect the development plan. Check the drawing and textual stipulations, online or at the planning office. Note the area type, the GRZ, building lines and rules on ancillary structures.
- Contact the building authority. A short, factual conversation with the lower building supervisory authority often clarifies more than lengthy research. Describe size, height, location and above all the intended use honestly.
- File a preliminary building enquiry. For larger investments, the Bauvoranfrage is the appropriate instrument. It leads to a preliminary ruling (Bauvorbescheid) on individual questions of permissibility – binding and usually valid for a limited period. Costs and procedure follow state law.
- Document everything. Record information in writing, with date and contact person; verbal assurances are worth little in case of doubt.
Important note
This article contains general information and does not constitute legal advice. In Germany, planning law and building regulations law are shaped by federal and state law as well as municipal statutes; their implementation is a matter for the individual federal states. Decisive for your case are the Building Code (BauGB), the state building code of your federal state, the development plan applicable to your plot and the information provided by the locally competent building authority. The provisions and categories mentioned here serve as orientation and do not replace an examination of your individual case. For a binding assessment, contact the lower building supervisory authority or a lawyer practising in building law.
Conclusion
Whether a container is permissible is decided first by the location, not by the product. In an area with a development plan, the stipulations set the frame; in the unplanned inner area, fitting into the immediate surroundings is what counts; in the outer area a considerably stricter standard applies that as a rule rules out residential and leisure use. Clarifying this classification at the outset – ideally with a look at the development plan and a conversation at the building authority – saves expensive detours. For larger projects, the preliminary building enquiry is the instrument of choice for obtaining binding clarity before the first container is delivered.