Regional Planning for Wind Energy

The regional plans (Regionalpläne) of the German federal states determine where wind energy is permissible. Three instruments shape wind turbine siting: priority areas (Vorranggebiete), concentration zones (Konzentrationszonen), and suitability areas (Eignungsgebiete). The WaLG reform has fundamentally changed how these instruments operate.

Why Steer Development Through Regional Plans At All?

Without spatial steering, wind energy in the outlying areas (Außenbereich) could in principle arise anywhere it is privileged under § 35 BauGB and otherwise permit-eligible. Regional planning exists to bundle this potentially diffuse distribution: sites with strong wind resource and low conflict potential are deliberately earmarked for wind, while more sensitive areas — close to settlements, or landscapes worth particular protection — are excluded. This also serves legal certainty for project developers: within a designated priority area, conflict potential during the permitting procedure is generally lower, because the site's fundamental suitability has already been examined during the planning process.

The Three Planning Instruments

The WaLG Reform — What Changed

Before WaLG:

• Municipalities could effectively steer wind development through concentration zones
• Outside the zones: wind turbines generally impermissible (exclusion effect)
• Prerequisite: “substantial space” (substantieller Raum) for wind in the plan

With WaLG (since 2023):

• Each federal state must designate 2.2% of its land area for wind by 2032
• If the area target is missed: the exclusion effect of concentration zones lapses
• Wind turbines may then be erected outside the designated zones, provided they are otherwise privileged
• Creates strong pressure for rapid area designation — and acceleration for project planners

How a Site Enters Regional Planning

1. Potential analysis by the planning association or state authority: wind resource, protected areas, setbacks, infrastructure
2. Consultation with public authorities (Träger öffentlicher Belange): nature conservation, landscape planning, water management, transport
3. Public participation: plan disclosure with objection period
4. Balancing of interests (Abwägung): all submitted concerns are weighed against each other
5. Resolution by the regional planning association + state approval
6. Binding effect: the plan is binding on authorities but subject to judicial review

Responsibilities: Federal Government, States, and Regional Planning Bodies

The division of authority over wind area planning runs across several levels. The federal government sets the area targets and the timeline through the Wind-on-Land Act (WaLG). Implementation falls to the federal states, which translate these requirements into state planning legislation and leave the concrete area designation to the regional planning bodies — usually planning associations or administrative districts. At the lowest level, municipalities act through their local land-use plans, though now only within the scope left to them by the regional plan and the WaLG. This multi-tier structure explains why a specific site's status often cannot be read off the regional plan alone: the municipal land-use plan and the state's implementation status under the WaLG also need to be checked.

Regional Plan versus Municipal Land-Use Plan — the Practical Difference

For project developers, the distinction between the two planning levels is central. The regional plan is drawn up at the supra-local level by a planning association or the upper state planning authority, and typically sets priority or suitability areas jointly for several municipalities. The municipal land-use plan (Flächennutzungsplan), by contrast, is a local instrument of the individual municipality and governs concentration zones within its own territory. The two levels must adapt to one another (the so-called counter-current principle): a regional-plan priority area generally prevails over a conflicting municipal land-use plan, but a municipality can still make additional, more specific determinations within a priority area through its land-use plan — for instance on turbine height, within the bounds of its local planning authority.

Typical Timeline for Updating a Regional Plan

A complete new regional plan, or an update to an existing one that adds a wind energy chapter, typically takes several years in practice — from the initial potential analysis through authority consultation and public disclosure to the legally binding resolution. For project developers, this means: a site not currently included in the designated area framework can still be added during an ongoing plan update. Early involvement in the drafting procedure — submitting input during the public disclosure period — is therefore an important, and often underestimated, lever for site development.

Litigation Risks

Regional plans are frequently challenged by environmental organizations or residents:

• Allegation of insufficient “substantial space” for wind
• Allegation of excessive exclusions (e.g. taboo zones drawn too broadly)
• Allegation of inadequate balancing with nature conservation interests

Successful challenges do occur — consequence: the regional plan becomes at least partially void, which in the concentration-zone model also eliminates the exclusion effect. This significantly slowed wind energy expansion in the 2010s.

Regional Planning and Repowering

An important special case applies to repowering projects: existing wind farm sites are almost always already located within a designated priority area or concentration zone, since that is where they were originally permitted. This substantially reduces the litigation and planning risk for a repowering project compared with a greenfield site, because planning-law permissibility is already established and generally does not need to be re-argued. An exception arises where the boundary of a priority area has since changed — for instance following a court-ordered redesignation — leaving the existing site at the edge of, or outside, the current area framework. Checking the current status of the regional plan before starting repowering planning is therefore worthwhile even for an established site; see also the repowering section.

Common Questions

What does “substantial space” mean?

A judicially unresolved concept. Rule of thumb: at least 1–2% of the total regional area designated for wind. Significantly less creates a risk of judicial annulment.

Can municipalities set their own minimum setbacks?

To a limited extent — within their local planning authority, yes. However, the WaLG has significantly curtailed municipal steering power.

Does this apply in Bavaria (10H rule)?

Bavaria has enshrined its 10H rule (10× total height as minimum setback) in state law. The WaLG could override it if Bavaria misses its area target — current status: behind schedule. Legal practice in 2026 is still being clarified.

Who can sue over a regional plan?

Standing to sue lies chiefly with recognized environmental organizations, via their associational right of action, as well as directly affected landowners or municipalities. Individual residents without direct impact generally have no standing of their own to challenge the regional plan as a whole.

Can a project developer propose an area for inclusion in the regional plan?

Not directly, but suggestions can be submitted during the public disclosure period, which the planning body must take into account in its balancing process. Binding inclusion only occurs with the final plan resolution.